MP實戰系列(一)之入門框架搭建和使用

mybatis plus官網:https://github.com/baomidou/mybatis-pluscss

上面有對應的實際例子,直接導入便可用。html

mybatis plus官方的怎麼介紹,我就不在這裏多說了,你們進入上方網址便可。前端

不過在此說明,mybatis plus絕對很是好用,比mybatis generator還好用,雖然mybatis逆向工程單表增刪改查自動生成,不過我以爲它生成的動態sql和一些QueryVo之類的太不友好了。而mybatis plus只需繼承,Dao繼承BaseMapper<T>,Service繼承IService<T>,Service實現類繼承ServiceImpl<DAO,T>並實現Service,而後在src/main/resource下只需保留一個mybatis放置的xml文件便可,裏面什麼resultMap都不須要寫,一片空白便可,除非特殊的需求,須要多個實體管理,一多對,多對多等。對於有mybatis的基礎學習mybatis plus是很是簡單的。不過初學者導入官網項目試着運行跑起來後,切不可抱着運行沒問題或者是效果出的來就無論了,官方文檔仍是要看的。雖說這個文檔沒有面面俱到,不過讓你心中有個數或有個大概,這樣對於之後學習仍是很是有幫助的。java

pom的依賴和spring+springmvc+mybatis其實也差很少,這裏的mybaits plus依賴其實裏面也封裝了mybatismysql

下面的spring和mybatis的xml配置文件,除了mybatis plus加入一部分有點區別於以前的ssm配置,不過大體仍是同樣的。複製過來,修改即用。git

運行環境:maven+jdk8+eclipse+window10(ubun16.04沒問題)+tomcat8github

項目中使用mybatis plus早就想寫總結了,我但願將我碰見的問題或者是使用的感覺與你們一塊兒分享web

因此才決定寫一個這系列的文章,一來總結,二來分享 spring

 下面演示示例加上我的看法sql

pom文件:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.lms.demo</groupId>
    <artifactId>LMS</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <!-- 文件拷貝時的編碼 -->  
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>  
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>  
        <!-- 編譯時的編碼 -->  
        <maven.compiler.encoding>UTF-8</maven.compiler.encoding> 
        <spring.version>4.3.13.RELEASE</spring.version>
        <junit.version>4.12</junit.version>
        <druid.version>1.1.0</druid.version>
        <fastjson.version>1.2.8</fastjson.version>
        <mybaitsplus.version>2.1.8</mybaitsplus.version>
        <mysql.version>5.1.38</mysql.version>
        <log4j.version>1.2.17</log4j.version>
        <slf4j.version>1.7.19</slf4j.version>
        <aspectjweaver.version>1.8.8</aspectjweaver.version>
        <fileupload.version>1.3.1</fileupload.version>
        <jstl.version>1.2</jstl.version>
        <commons-io.version>2.5</commons-io.version>
        <commons-fileupload.version>1.3.1</commons-fileupload.version>
        <ruedigermoeller-fst.version>2.56</ruedigermoeller-fst.version>
        <json.version>20170516</json.version>
        <dozer.version>5.5.1</dozer.version>
        <poi.version>3.14</poi.version>
    </properties>

    <dependencies>
        <!-- JUnit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
         <dependency>
         <!-- jsp -->
        <groupId>javax.servlet.jsp</groupId>
         <artifactId>jsp-api</artifactId>
         <version>2.1</version>
         <scope>compile</scope>
        </dependency>
        <!-- servlet -->
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>compile</scope>
        </dependency>
    

        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-test</artifactId>
          <version>${spring.version}</version>
          <scope>compile</scope>
           </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>

        <!-- Spring MVC -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>

        <!-- AOP -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectjweaver.version}</version>
        </dependency>

        <!-- FileUpload -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>${fileupload.version}</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>${jstl.version}</version>
        </dependency>

        <!-- Mybatis-Plus -->
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>${mybaitsplus.version}</version>
        </dependency>

        <!-- Mysql -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>

        <!-- Druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>

        <!-- FastJson -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>${fastjson.version}</version>
        </dependency>

        <!-- Log -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        
        
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.3.2</version>
        </dependency>
        
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>${commons-io.version}</version>
        </dependency>
        
        <dependency>
            <groupId>de.ruedigermoeller</groupId>
            <artifactId>fst</artifactId>
            <version>${ruedigermoeller-fst.version}</version>
        </dependency>
       <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
        </dependency>
        
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.3</version>
        </dependency>
        
                
        <!-- Json in java  -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20170516</version>
        </dependency>

        <!-- Email -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-email</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>
        
        <!-- 條形碼、二維碼生成  -->
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.0</version>
        </dependency>
        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>javase</artifactId>
            <version>3.3.0</version>
        </dependency>
        
        <!-- User Agent -->
        <dependency>
            <groupId>eu.bitwalker</groupId>
            <artifactId>UserAgentUtils</artifactId>
            <version>1.20</version>
        </dependency>
        
        <!-- Apache HTTP -->
        <dependency>
          <groupId>org.apache.httpcomponents</groupId>
          <artifactId>httpclient</artifactId>
          <version>4.5.3</version>
        </dependency>
        
        <!-- Jsoup HTTP -->
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.9.1</version>
        </dependency>
        
        <!-- 圖片Meta獲取 -->
        <dependency>
            <groupId>com.drewnoakes</groupId>
            <artifactId>metadata-extractor</artifactId>
            <version>2.9.1</version>
        </dependency>
        <!-- 縮略圖工具  -->
        <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.8</version>
        </dependency>
        <!-- 圖片驗證碼生成  -->
        <dependency>
            <groupId>com.bladejava</groupId>
            <artifactId>blade-patchca</artifactId>
            <version>1.0.5</version>
        </dependency>
        
        <!-- jackson -->        
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.9.4</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.9.5</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.dataformat/jackson-dataformat-xml -->
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
            <version>2.9.5</version>
        </dependency>
        
        <!-- Java xml -->
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6.1</version>
        </dependency>
        
        <!-- XPath xml -->
        <dependency>
            <groupId>jaxen</groupId>
            <artifactId>jaxen</artifactId>
            <version>1.1.6</version>
        </dependency>
        
        <!-- Snake YAML -->
        <dependency>
            <groupId>org.yaml</groupId>
            <artifactId>snakeyaml</artifactId>
            <version>1.17</version>
        </dependency>
        
    
        <!-- Bean To Bean copy -->
        <dependency>
            <groupId>net.sf.dozer</groupId>
            <artifactId>dozer</artifactId>
            <version>${dozer.version}</version>
        </dependency>
        
        <!-- POI Office Tools -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>${poi.version}</version>
            <exclusions>
                <exclusion>
                    <artifactId>commons-codec</artifactId>
                    <groupId>commons-codec</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml-schemas</artifactId>
            <version>${poi.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-scratchpad</artifactId>
            <version>${poi.version}</version>
        </dependency>
        
        
        <!-- pinyin4j -->
        <dependency>
            <groupId>com.belerweb</groupId>
            <artifactId>pinyin4j</artifactId>
            <version>2.5.0</version>
        </dependency>
        
        <!-- Apache Tools Ant Tar Zip  -->
        <dependency>
            <groupId>org.apache.ant</groupId>
            <artifactId>ant</artifactId>
            <version>1.9.7</version>
        </dependency>
        
        <!-- File MimeType ContentType -->
        <dependency>
            <groupId>net.sf.jmimemagic</groupId>
            <artifactId>jmimemagic</artifactId>
            <version>0.1.3</version>
            <exclusions>
                <exclusion>
                    <groupId>xerces</groupId>
                    <artifactId>xercesImpl</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.codehaus.jackson</groupId>
                    <artifactId>jackson-xc</artifactId>
                </exclusion>
                <exclusion>
                    <groupId>org.codehaus.jackson</groupId>
                    <artifactId>jackson-jaxrs</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j</artifactId>
                    <groupId>log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        

    <!-- https://mvnrepository.com/artifact/com.squareup.okhttp3/okhttp -->
    <dependency>
        <groupId>com.squareup.okhttp3</groupId>
        <artifactId>okhttp</artifactId>
        <version>3.9.1</version>
    </dependency>
    
    <!-- https://mvnrepository.com/artifact/com.squareup.okio/okio -->
    <dependency>
        <groupId>com.squareup.okio</groupId>
        <artifactId>okio</artifactId>
        <version>1.13.0</version>
    </dependency>
    
        <!-- swagger -->  
        <dependency>    
            <groupId>com.mangofactory</groupId>    
            <artifactId>swagger-springmvc</artifactId> 
            <version>1.0.2</version>    
        </dependency> 
        
        
    </dependencies>

    <build>
        <plugins>
        
            <!-- 指定編譯版本 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            
                <!-- YUI Compressor (CSS/JS壓縮) -->
<!--                 <plugin>
                    <groupId>net.alchim31.maven</groupId>
                    <artifactId>yuicompressor-maven-plugin</artifactId>
                    <version>1.5.1</version>
                    <executions>
                        <execution>
                        <phase>prepare-package</phase>
                            <goals>
                                <goal>compress</goal>
                            </goals>
                        </execution>
                    </executions>
                    <configuration>
                        <encoding>UTF-8</encoding>
                        <jswarn>false</jswarn>
                        <nosuffix>true</nosuffix>
                        <linebreakpos>30000</linebreakpos>
                        <force>true</force>
                        <includes>
                            <include>**/*.js</include>
                            <include>**/*.css</include>
                        </includes>
                        <excludes>
                            <exclude>**/*.min.js</exclude>
                            <exclude>**/*.min.css</exclude>
                        </excludes>
                     <aggregations>
                         <aggregation> 
                             <removeIncluded>true</removeIncluded> 
                             <insertNewLine>true</insertNewLine> 
                             <inputDir>${project.build.directory}/${project.build.finalName}</inputDir>
                             <output>${project.build.directory}/${project.build.finalName}/app/js/app.pack.js</output>
                             <includes>
                                 <include>app/js/app*.js</include> 
                             </includes> 
                             <excludes> 
                                 <exclude>**/**min.js</exclude> 
                             </excludes>
                         </aggregation>
                    </aggregations>
                    </configuration>
                </plugin> -->
        </plugins>
                <finalName>${project.artifactId}</finalName>
    </build>
    
        <repositories>
    
        <repository>
            <id>aliyun-repos</id>
            <name>Aliyun Repository</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases><enabled>true</enabled></releases>
            <snapshots><enabled>false</enabled></snapshots>
        </repository>
        
    </repositories>
    
    <pluginRepositories>
        
        <pluginRepository>
            <id>aliyun-repos</id>
            <name>Aliyun Repository</name>
            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
            <releases><enabled>true</enabled></releases>
            <snapshots><enabled>false</enabled></snapshots>
        </pluginRepository>
        
    </pluginRepositories>
</project>

 

 mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD SQL Map Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<!--
 |   plugins在配置文件中的位置必須符合要求,不然會報錯,順序以下:
 |   properties?, settings?,
 |   typeAliases?, typeHandlers?,
 |   objectFactory?,objectWrapperFactory?,
 |   plugins?,
 |   environments?, databaseIdProvider?, mappers?
 |-->
<configuration>
    <!--
     | 全局配置設置
     |
     | 可配置選項                   默認值,     描述
     |
     | aggressiveLazyLoading       true,     當設置爲‘true’的時候,懶加載的對象可能被任何懶屬性所有加載。不然,每一個屬性都按需加載。
     | multipleResultSetsEnabled   true,     容許和不容許單條語句返回多個數據集(取決於驅動需求)
     | useColumnLabel              true,     使用列標籤代替列名稱。不一樣的驅動器有不一樣的做法。參考一下驅動器文檔,或者用這兩個不一樣的選項進行測試一下。
     | useGeneratedKeys            false,    容許JDBC 生成主鍵。須要驅動器支持。若是設爲了true,這個設置將強制使用被生成的主鍵,有一些驅動器不兼容不過仍然能夠執行。
     | autoMappingBehavior         PARTIAL,  指定MyBatis 是否而且如何來自動映射數據表字段與對象的屬性。PARTIAL將只自動映射簡單的,沒有嵌套的結果。FULL 將自動映射全部複雜的結果。
     | defaultExecutorType         SIMPLE,   配置和設定執行器,SIMPLE 執行器執行其它語句。REUSE 執行器可能重複使用prepared statements 語句,BATCH執行器能夠重複執行語句和批量更新。
     | defaultStatementTimeout     null,     設置一個時限,以決定讓驅動器等待數據庫迴應的多長時間爲超時
     | -->
    <settings>
        <!-- 這個配置使全局的映射器啓用或禁用緩存 -->
        <setting name="cacheEnabled" value="true"/>
        <!-- 全局啓用或禁用延遲加載。當禁用時,全部關聯對象都會即時加載 -->
        <setting name="lazyLoadingEnabled" value="true"/>
        <setting name="multipleResultSetsEnabled" value="true"/>
        <setting name="useColumnLabel" value="true"/>
        <setting name="defaultExecutorType" value="REUSE"/>
        <setting name="defaultStatementTimeout" value="25000"/>
    </settings>

</configuration>

 

spring-mvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    
    <!-- Controller包(自動注入) -->
    <context:component-scan base-package="com.lms.controller"/>

    <mvc:default-servlet-handler/>
    

    <!-- FastJson注入 -->
    <mvc:annotation-driven>
        <mvc:message-converters register-defaults="true">
            <!-- 避免IE執行AJAX時,返回JSON出現下載文件 -->
            <!-- FastJson -->
            <bean id="fastJsonHttpMessageConverter"
                  class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <!-- 這裏順序不能反,必定先寫text/html,否則ie下出現下載提示 -->
                        <value>text/html;charset=UTF-8</value>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
              <!--   <property name="features">
                    <array value-type="com.alibaba.fastjson.serializer.SerializerFeature">
                        避免循環引用
                        <value>DisableCircularReferenceDetect</value>
                        是否輸出值爲null的字段
                        <value>WriteMapNullValue</value>
                        數值字段若是爲null,輸出爲0,而非null
                        <value>WriteNullNumberAsZero</value>
                        字符類型字段若是爲null,輸出爲"",而非null 
                        <value>WriteNullStringAsEmpty</value>
                        List字段若是爲null,輸出爲[],而非null
                        <value>WriteNullListAsEmpty</value>
                        Boolean字段若是爲null,輸出爲false,而非null
                        <value>WriteNullBooleanAsFalse</value>
                    </array>
                </property> -->
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

    <!-- 上傳限制 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <!-- 上傳文件大小限制爲31M,31*1024*1024 -->
        <property name="maxUploadSize" value="32505856"/>
    </bean>
    
 
</beans>

 

spring-mybatis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd">

    <!-- 配置數據源 -->
    <bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <property name="url" value="${jdbc_url}"/>
        <property name="username" value="${jdbc_username}"/>
        <property name="password" value="${jdbc_password}"/>

        <!-- 初始化鏈接大小 -->
        <property name="initialSize" value="0"/>
        <!-- 鏈接池最大使用鏈接數量 -->
        <property name="maxActive" value="20"/>
        <!-- 鏈接池最大空閒 -->
        <property name="maxIdle" value="20"/>
        <!-- 鏈接池最小空閒 -->
        <property name="minIdle" value="0"/>
        <!-- 獲取鏈接最大等待時間 -->
        <property name="maxWait" value="60000"/>

        <property name="validationQuery" value="${validationQuery}"/>
        <property name="testOnBorrow" value="false"/>
        <property name="testOnReturn" value="false"/>
        <property name="testWhileIdle" value="true"/>

        <!-- 配置間隔多久才進行一次檢測,檢測須要關閉的空閒鏈接,單位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000"/>
        <!-- 配置一個鏈接在池中最小生存的時間,單位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="25200000"/>

        <!-- 打開removeAbandoned功能 -->
        <property name="removeAbandoned" value="true"/>
        <!-- 1800秒,也就是30分鐘 -->
        <property name="removeAbandonedTimeout" value="1800"/>
        <!-- 關閉abanded鏈接時輸出錯誤日誌 -->
        <property name="logAbandoned" value="true"/>

        <!-- 監控數據庫 -->
        <property name="filters" value="mergeStat"/>
        
    </bean>
    
    <!-- 慢SQL記錄 -->
    <bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
        <!-- 慢sql時間設置,即執行時間大於500毫秒的都是慢sql -->
        <property name="slowSqlMillis" value="500"/>
        <property name="logSlowSql" value="true"/>
    </bean>

    <bean id="log-filter" class="com.alibaba.druid.filter.logging.Log4jFilter">
        <property name="dataSourceLogEnabled" value="true" />
        <property name="statementExecutableSqlLogEnable" value="true" />
    </bean>
    <bean id="druid-stat-interceptor"
        class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
    </bean>

    <bean id="druid-stat-pointcut" class="org.springframework.aop.support.JdkRegexpMethodPointcut"
        scope="prototype">
        <property name="patterns">
            <list>
                <value>com.lms.service.*</value>
                <value>com.lms.controller.*</value>
            </list>
        </property>
    </bean>
    
    <aop:config>
        <aop:advisor advice-ref="druid-stat-interceptor"
            pointcut-ref="druid-stat-pointcut" />
    </aop:config>
    
    
    

    <!-- Spring整合Mybatis,更多查看文檔:http://mp.baomidou.com -->
    <bean id="sqlSessionFactory" class="com.baomidou.mybatisplus.spring.MybatisSqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!-- 自動掃描Mapping.xml文件 -->
        <property name="mapperLocations" value="classpath:mybatis/system/*.xml"/>
        <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"/>
        <property name="typeAliasesPackage" value="com.lms.entity"/>
        <property name="typeEnumsPackage" value="com.lms.enums"/>
        <property name="plugins">
            <array>
                <!-- 分頁插件配置 -->
                <bean id="paginationInterceptor" class="com.baomidou.mybatisplus.plugins.PaginationInterceptor">
                </bean>
            </array>
        </property>
        <!-- 全局配置注入 -->
        <property name="globalConfig" ref="globalConfig" />
    </bean>
    <bean id="globalConfig" class="com.baomidou.mybatisplus.entity.GlobalConfiguration">
        <!--
            AUTO->`0`("數據庫ID自增")
             INPUT->`1`(用戶輸入ID")
            ID_WORKER->`2`("全局惟一ID")
            UUID->`3`("全局惟一ID")
        -->
        <property name="idType" value="2" />
        <!--
            MYSQL->`mysql`
            ORACLE->`oracle`
            DB2->`db2`
            H2->`h2`
            HSQL->`hsql`
            SQLITE->`sqlite`
            POSTGRE->`postgresql`
            SQLSERVER2005->`sqlserver2005`
            SQLSERVER->`sqlserver`
        -->
        <!-- Oracle須要添加該項 -->
        <!-- <property name="dbType" value="oracle" /> -->
        <!-- 全局表爲下劃線命名設置 true -->
        <!-- <property name="dbColumnUnderline" value="true" /> -->
        <property name="metaObjectHandler">
            <bean class="com.lms.common.MyMetaObjectHandler" />
        </property>
    </bean>

    <!-- MyBatis 動態掃描  -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.lms.dao"/>
    </bean>

    <!-- 配置事務管理 -->
    <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 事務管理 屬性 -->
    <tx:advice id="transactionAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED"/>
            <tx:method name="append*" propagation="REQUIRED"/>
            <tx:method name="save*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="modify*" propagation="REQUIRED"/>
            <tx:method name="edit*" propagation="REQUIRED"/>
            <tx:method name="insert*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="remove*" propagation="REQUIRED"/>
            <tx:method name="repair" propagation="REQUIRED"/>

            <tx:method name="get*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="find*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="load*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="search*" propagation="REQUIRED" read-only="true"/>
            <tx:method name="datagrid*" propagation="REQUIRED" read-only="true"/>

            <tx:method name="*" propagation="REQUIRED" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!-- 配置切面 -->
    <aop:config>
        <aop:pointcut id="transactionPointcut" expression="execution(* com.lms.service..*.*(..))"/>
        <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice"/>
    </aop:config>

</beans>

 

spring.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">

    <!-- 引入屬性文件 -->
    <context:property-placeholder location="classpath:config.properties"/>

    <!-- Service包(自動注入) -->
    <context:component-scan base-package="com.lms.service"/>

    <import resource="classpath:spring/spring-mybatis.xml"/>
</beans>

 

config.properties

validationQuery=SELECT 1
jdbc_url=jdbc:mysql://127.0.0.1:3306/lms?useUnicode=true&characterEncoding=UTF-8
jdbc_username=root
jdbc_password=1234

log4j.properties(本地調式環境使用DeBug,DeBug打印日誌更爲詳細,生產環境建議日誌級別使用Info)

log4j.rootLogger=DEBUG,CONSOLE,A
log4j.addivity.org.apache=false
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=DEBUG
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH\:mm\:ss} -%-4r [%t] %-5p  %x - %m%n
log4j.appender.CONSOLE.Target=System.out
#log4j.appender.CONSOLE.charset=utf-8
log4j.appender.CONSOLE.encoding=utf-8
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.A=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A.File=${catalina.home}/logs/yo_log/PurePro_
log4j.appender.A.DatePattern=yyyy-MM-dd'.log'
log4j.appender.A.layout=org.apache.log4j.PatternLayout
log4j.appender.A.layout.ConversionPattern=[FH_sys]  %d{yyyy-MM-dd HH\:mm\:ss} %5p %c{1}\:%L \: %m%n
log4j.logger.java.sql.ResultSet=INFO
log4j.logger.org.apache=DEBUG
log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

實體類:

package com.lms.entity;

import com.baomidou.mybatisplus.annotations.TableField;
import com.baomidou.mybatisplus.annotations.TableId;
import com.baomidou.mybatisplus.annotations.TableName;

import java.io.Serializable;
import java.util.Date;

/**
 * lms系統用戶基本信息表
 * 
 * @author youcong
 * @date 2018-04-20 19:30:29
 */
@TableName("user")
public class UserEntity implements Serializable {
    private static final long serialVersionUID = 1L;

    /**
     * 
     */
    @TableId
    private Integer id;
    /**
     * 用戶id
     */
    @TableField("user_id")
    private String userId;
    /**
     * 系統分配暱稱
     */
    @TableField("nick_name")
    private String nickName;
    /**
     * 真實姓名
     */
    @TableField("real_name")
    private String realName;
    /**
     * 手機號
     */
    private String mobile;
    /**
     * 郵箱
     */
    private String email;
    /**
     * 
     */
    @TableField("sms_signature")
    private String smsSignature;
    /**
     * 頭像
     */
    private String icon;
    /**
     * 性別
     */
    private Integer gender;
    /**
     * 證件號
     */
    @TableField("idcard_no")
    private String idcardNo;

    /**
     * 設置:
     */
    public void setId(Integer id) {
        this.id = id;
    }
    /**
     * 獲取:
     */
    public Integer getId() {
        return id;
    }
    /**
     * 設置:用戶id
     */
    public void setUserId(String userId) {
        this.userId = userId;
    }
    /**
     * 獲取:用戶id
     */
    public String getUserId() {
        return userId;
    }
    /**
     * 設置:系統分配暱稱
     */
    public void setNickName(String nickName) {
        this.nickName = nickName;
    }
    /**
     * 獲取:系統分配暱稱
     */
    public String getNickName() {
        return nickName;
    }
    /**
     * 設置:真實姓名
     */
    public void setRealName(String realName) {
        this.realName = realName;
    }
    /**
     * 獲取:真實姓名
     */
    public String getRealName() {
        return realName;
    }
    /**
     * 設置:手機號
     */
    public void setMobile(String mobile) {
        this.mobile = mobile;
    }
    /**
     * 獲取:手機號
     */
    public String getMobile() {
        return mobile;
    }
    /**
     * 設置:郵箱
     */
    public void setEmail(String email) {
        this.email = email;
    }
    /**
     * 獲取:郵箱
     */
    public String getEmail() {
        return email;
    }
    /**
     * 設置:
     */
    public void setSmsSignature(String smsSignature) {
        this.smsSignature = smsSignature;
    }
    /**
     * 獲取:
     */
    public String getSmsSignature() {
        return smsSignature;
    }
    /**
     * 設置:頭像
     */
    public void setIcon(String icon) {
        this.icon = icon;
    }
    /**
     * 獲取:頭像
     */
    public String getIcon() {
        return icon;
    }
    /**
     * 設置:性別
     */
    public void setGender(Integer gender) {
        this.gender = gender;
    }
    /**
     * 獲取:性別
     */
    public Integer getGender() {
        return gender;
    }
    /**
     * 設置:證件號
     */
    public void setIdcardNo(String idcardNo) {
        this.idcardNo = idcardNo;
    }
    /**
     * 獲取:證件號
     */
    public String getIdcardNo() {
        return idcardNo;
    }
}

解說:(1)@TableName是mybatis plus對錶的註解,每一個實體必需要加,否則會致使表不存在異常。

        (2)@TableId對主鍵的註解 @TableId中有一個屬性叫type是枚舉類型,該屬性主要做用是主鍵以什麼形式存在,例如IdType.AUTO自增或UUID。

        (3)@TableField像及了mybatis中的resultMap,在mybatis中爲何要使用resultMap,由於當實體中的屬性名與數據庫中的表不一致時須要手動映射,resultMap的做用在於手動映射,既然說了resultMap就不能不說resultType,resultType當實體屬性與表字段一致時自動映射。 在mybatis plus使用@TableField的場景與mybatis中使用resultMap的是一致的。@TableField中還有一個屬性不能不提,就是exist,這個屬性屬於boolean類型,默認爲true,意思是是否在數據表中存在,true存在,false不存在,這個的應用場景是當某個實體中須要包含其餘實體時,可以使用該屬性,不然自動生成的查會報錯,使用自動生成的查有關方法,默認是查全部數據表全部字段,固然可以使用setSqlSelect()方法指定須要查的字段,能夠在必定程度上避免該錯誤的出現,否則致使的錯誤最有可能就是找不到該字段異常(column not exist),使用exist屬性可直接避免,固然也能夠在該屬性中加入static或transient修飾,與exist的做用本質上是同樣的。

      

        

 

 

DAO:

package com.lms.dao;

import java.util.Map;

import com.baomidou.mybatisplus.mapper.BaseMapper;
import com.lms.entity.UserEntity;

/**
 * lms系統用戶基本信息表
 * 
 * @author youcong
 * @date 2018-04-20 22:22:29
 */
public interface UserDao extends BaseMapper<UserEntity> {
    

    
}

 解說:BaseMapper<T>中包含的就是一系列增刪改查,maven項目中可Ctrl+鼠標點擊進去查看源碼,源碼全部註釋都有,很是淺顯易懂,若是你須要加入自定義sql直接寫就行,跟mybatis同樣,在該類中新增方法,只需在對應的xml中配置便可

Service:

package com.lms.service;

import java.util.Map;

import com.baomidou.mybatisplus.service.IService;
import com.lms.entity.UserEntity;

/**
 * lms系統用戶基本信息表
 *
 * @author youcong
 * @date 2018-04-20 22:22:29
 */
public interface UserService extends IService<UserEntity> {

    
    
    
}

 解說:IService<T>同DAO也是同樣的,查看源碼一目瞭然

Service實現類:

package com.lms.service.impl;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.baomidou.mybatisplus.service.impl.ServiceImpl;
import com.lms.dao.UserDao;
import com.lms.entity.UserEntity;
import com.lms.service.UserService;

/**]
 * 
 * @author youcong
 *
 */
@Service("userService")
public class UserServiceImpl extends ServiceImpl<UserDao, UserEntity> implements UserService {


}

 解說:@Service註解的做用也是同mybatis以前那樣也是同樣,這個註解的做用掃描Service層,自動註解spring容器

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>LMS</display-name>
  <!-- 加載配置文件 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:spring/spring.xml</param-value>
  </context-param>
  <!-- 字符過濾器 攔截全部 -->
  <filter>
    <filter-name>encodingFilter</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
      
 <!-- druid鏈接池攔截器 -->
    <filter>  
    <filter-name>DruidWebStatFilter</filter-name>  
    <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>  
    <init-param>  
        <param-name>exclusions</param-name>  
        <param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>  
    </init-param>  
    </filter>  
    <filter-mapping>  
    <filter-name>DruidWebStatFilter</filter-name>  
    <url-pattern>/*</url-pattern>  
</filter-mapping>
  <!-- 上下文監聽 -->
  <listener>
    <description>Spring監聽器</description>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 緩存清除監聽器 -->
  <listener>
    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
  </listener>
    <!-- 靜態資源放行 -->
    <servlet-mapping>    
    <servlet-name>default</servlet-name>    
    <url-pattern>/view/</url-pattern>    
    <url-pattern>/css/</url-pattern>    
    <url-pattern>/js/*"</url-pattern>       
    <url-pattern>/images/*</url-pattern>  
    <url-pattern>/fonticon/*</url-pattern>
    <url-pattern>/layui/*</url-pattern>
    <url-pattern>*.html</url-pattern>
    <url-pattern>*.js</url-pattern>
    <url-pattern>*.css</url-pattern>
    <url-pattern>*.jpg</url-pattern>
    <url-pattern>*.png</url-pattern>  
     <url-pattern>/lib/*</url-pattern>  
    <url-pattern>/font/*</url-pattern> 
    <url-pattern>/lang/*</url-pattern>
    </servlet-mapping>
    

  <!-- 前端控制器 攔截 -->
  <servlet>
    <servlet-name>SpringMVC</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <description>SpringMVC</description>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring/spring-mvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>

  <servlet-mapping>
    <servlet-name>SpringMVC</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
  
  <!-- druid相關信息 -->
    <servlet>
        <servlet-name>DruidStatView</servlet-name>
        <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
        <init-param>
            <!-- 用戶名 -->
            <param-name>loginUsername</param-name>
            <param-value>druid</param-value>
        </init-param>
        <init-param>
            <!-- 密碼 -->
            <param-name>loginPassword</param-name>
            <param-value>druid</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>DruidStatView</servlet-name>
        <url-pattern>/druid/*</url-pattern>
    </servlet-mapping>
    
  <!-- session過時時間 -->
  <session-config>
    <session-timeout>30</session-timeout>
  </session-config>
  
  <!-- 歡迎頁 -->
  <welcome-file-list>
    <welcome-file>test.html</welcome-file> 
  </welcome-file-list>
</web-app>

 

 

MyMetaObjectHandler

package com.lms.common;

import java.util.Date;

import org.apache.ibatis.reflection.MetaObject;

import com.baomidou.mybatisplus.mapper.MetaObjectHandler;

/**
 * 自定義填充處理器
 */
public class MyMetaObjectHandler extends MetaObjectHandler {

    @Override
    public void insertFill(MetaObject metaObject) {
        this.setFieldValByName("ctime", new Date(), metaObject);
    }

    @Override
    public boolean openUpdateFill() {
        return false;
    }

    @Override
    public void updateFill(MetaObject metaObject) {
        // 關閉更新填充、這裏不執行
    }
}

UserDao.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.lms.dao.UserDao">


</mapper>

 

解說:這個xml裏面什麼也沒有,一具空殼,可是沒有這空殼也是萬萬不行的,這就好像mybatis除了xm方式,還有註解的方式,儘管註解的方式如今不多用,用過mybatis註解的人都知道一點,隨着業務的開展,sql會愈來愈多,寫在dao中的sql也愈來愈多,這就不解耦了,並且mybatis使用註解的前提,必須仍是要有一個空殼xml的。之因此jdbc沒人用了,最大的缺點就是java代碼與sql緊密度高,也就是耦合度高,因此mybatis註解幾乎如今沒人用,很大程度也是這個緣由。使用xml方便管理。而mybatis plus也能用xml,固然同時也是能夠用mybatis註解的方式,mybatis plus開發團隊也同時一再聲明過,mybatis plus在mybatis的基礎上只作加強不作改變。因此mybatis的各方面特性也是能夠用的,絲絕不影響對於mybatis習慣的開發者們。

Junit單元測試:

package test;

import java.util.List;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.lms.entity.UserEntity;
import com.lms.dao.UserDao;


@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring/spring.xml")
public class JunitTest {


    
    @Autowired
    private UserDao ud;

    
    @Test
    public void testName2() throws Exception {
        
        List<UserEntity> list =ud.selectList(null);
        for (UserEntity u : list) {
            System.out.println(u);
        }
        
        
    }
    
}

 解說:單元測試和以前的spring+mybatis也是同樣的,沒有任何變化

 

mybatis plus若是要問我最喜歡它的地方是什麼?

答:能夠從這麼幾個方面說。

第一,封裝的增刪改查(多條件查詢,分頁查詢等等應有盡有),使我開發效率獲得很大的提高,雖說增刪改查能夠cv大法解決,可是也是不小的工做量,使用mybaits plus開發效率獲得很是大的提高,使我更能專一於業務邏輯;

第二,xml是無比的簡潔,而mybatis逆向工程看起來不太友好(這裏聲明不針對mybatis);

第三,註解是如此的親易近人,如何的讓人痛快,以前使用時,還挺疑惑,自動生成的我如何sql優化呢,開發者們都知道一點,一個系統的瓶頸與sql方面有很大的緊密度的,沒想到mybatis plus只需一個方法,sql優化也作到了;

以前也時常造訪github和碼雲,發現裏面也有很多用mybatis plus,其中比較有名的就是人人開源,該代碼生成器徹底能夠挪用過來,以前一個庫四五十張表,一個敲太累了,逆向工程的話,也不太符合需求,直接果斷的用人人開源的代碼生成器(該代碼生成器原理也是基於mybatis plus),不過它生成只需改一部分便可用了。運行徹底沒問題。不過,這個小部分問題,我還要再研究研究這我的人開源的代碼生成器。使其更能符合個人需求。

人人開源的代碼生成器幫助我提高了很多效率,與mybatis plus徹底無縫結合,本人在此推薦。

該官網爲:http://www.renren.io/

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