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SpringMVC概述前端
Spring Web MVC是一種基於Java的實現了Web MVC設計模式的請求驅動類型的輕量級Web框架,即便用了MVC架構模式的思想,將web層進行職責解耦,基於請求驅動指的就是使用請求-響應模型,框架的目的就是幫助咱們簡化開發,Spring Web MVC也是要簡化咱們平常Web開發的。java
什麼是MVCmysql
程序員
SpringMVC的強大之處web
這些描述都是我從別的文檔上摘下來了,看得雲裏霧裏的,我我的理解,SpringMVC其實就是對servlet的封裝。沒用ssm的時候,前端頁面調用Controller(servlet)時須要在web.xml內爲每個servlet進行配置,很是麻煩;使用SpringMVC以後,只須要幾個註解就能夠輕鬆訪問Controller,而且數據的傳輸也變得很是方便,其實說白了,框架就是簡化開發而存在的,使得程序員更關注在業務上而不是(基礎)代碼上。spring
經常使用的SpringMVC註解sql
SSM整合數據庫
<dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.3.8.RELEASE</version> </dependency> <dependency> <groupId>com.google.code.gson</groupId> <artifactId>gson</artifactId> <version>2.8.2</version> </dependency> <dependency> <groupId>org.apache.httpcomponents</groupId> <artifactId>httpclient</artifactId> <version>4.5.3</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.21</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.21</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.46</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.2.8</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.7</version> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.8</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.2</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.5</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency>
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>classpath:log4j.properties</param-value> </context-param> <context-param> <param-name>log4jRefreshInterval</param-name> <param-value>60000</param-value> </context-param> <!-- Log4j的監聽器要放在spring監聽器前面 --> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>springServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:/spring-mvc*.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>static/index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <context-param> <param-name>log4jConfigLocation</param-name> <param-value>classpath:log4j.properties</param-value> </context-param> <context-param> <param-name>log4jRefreshInterval</param-name> <param-value>60000</param-value> </context-param> <!-- Log4j的監聽器要放在spring監聽器前面 --> <listener> <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-context*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>springServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath*:/spring-mvc*.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>static/index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
db.propertiesexpress
# JDBC jdbc.driverClass=com.mysql.jdbc.Driver jdbc.connectionURL=jdbc:mysql://localhost:3306/test?allowMultiQueries=true&useUnicode=true&characterEncoding=utf-8&useSSL=false jdbc.userName=root jdbc.password=123456 # JDBC Pool jdbc.pool.init=1 jdbc.pool.minIdle=3 jdbc.pool.maxActive=20 # JDBC Test jdbc.testSql=SELECT 'x' FROM DUAL #============================# #==== Framework settings ====# #============================# # \u89c6\u56fe\u6587\u4ef6\u5b58\u653e\u8def\u5f84 web.view.prefix=/WEB-INF/views/ web.view.suffix=.jsp
spring-context.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:tx="http://www.springframework.org/schema/tx" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!--開啓註解掃描--> <context:annotation-config/> <!--不掃描Controller註解--> <context:component-scan base-package="com.alfred"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 配置事務管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean> <!-- 開啓事務註解驅動 --> <tx:annotation-driven transaction-manager="transactionManager"/> </beans>
spring-context-druid.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" 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"> <!-- 加載配置屬性文件 --> <context:property-placeholder ignore-unresolvable="true" location="classpath:db.properties"/> <!-- 數據源配置, 使用 Druid 數據庫鏈接池 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <!-- 數據源驅動類可不寫,Druid默認會自動根據URL識別DriverClass --> <property name="driverClassName" value="${jdbc.driverClass}"/> <!-- 基本屬性 url、user、password --> <property name="url" value="${jdbc.connectionURL}"/> <property name="username" value="${jdbc.userName}"/> <property name="password" value="${jdbc.password}"/> <!-- 配置初始化大小、最小、最大 --> <property name="initialSize" value="${jdbc.pool.init}"/> <property name="minIdle" value="${jdbc.pool.minIdle}"/> <property name="maxActive" value="${jdbc.pool.maxActive}"/> <!-- 配置獲取鏈接等待超時的時間 --> <property name="maxWait" value="60000"/> <!-- 配置間隔多久才進行一次檢測,檢測須要關閉的空閒鏈接,單位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000"/> <!-- 配置一個鏈接在池中最小生存的時間,單位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000"/> <property name="validationQuery" value="${jdbc.testSql}"/> <property name="testWhileIdle" value="true"/> <property name="testOnBorrow" value="false"/> <property name="testOnReturn" value="false"/> <!-- 配置監控統計攔截的filters --> <property name="filters" value="stat"/> </bean> </beans>
spring-context-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" 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"> <!-- 配置 SqlSession --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- 用於配置對應實體類所在的包,多個 package 之間能夠用 ',' 號分割 --> <property name="typeAliasesPackage" value="com.alfred.domain"/> <!-- 用於配置對象關係映射配置文件所在目錄 --> <property name="mapperLocations" value="classpath:/mapper/*.xml"/> <property name="configLocation" value="classpath:/mybatis-config.xml"></property> </bean> <!-- 掃描 Mapper --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.alfred.mapper" /> </bean> </beans>
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"> <description>Spring MVC Configuration</description> <!-- 加載配置屬性文件 --> <context:property-placeholder ignore-unresolvable="true" location="classpath:db.properties"/> <!-- 使用 Annotation 自動註冊 Bean,只掃描 @Controller --> <context:component-scan base-package="com.alfred" use-default-filters="false"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 默認的註解映射的支持 --> <mvc:annotation-driven/> <!-- 定義視圖文件解析 --> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="${web.view.prefix}"/> <property name="suffix" value="${web.view.suffix}"/> </bean> <!--文件上傳bean 定義--> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 默認編碼 --> <property name="defaultEncoding" value="utf-8"/> <!-- 文件大小最大值 --> <property name="maxUploadSize" value="10485760000"/> <!-- 內存中的最大值 --> <property name="maxInMemorySize" value="40960"/> <!-- 啓用是爲了推遲文件解析,以便捕獲文件大小異常 --> <property name="resolveLazily" value="true"/> </bean> <!-- 靜態資源映射 --> <mvc:resources mapping="/static/**" location="/static/" cache-period="31536000"/> <!-- 解決先後端分離跨域問題--> <mvc:cors> <mvc:mapping path="/**" allowed-origins="*" allowed-methods="POST, GET, OPTIONS, DELETE, PUT,PATCH" allowed-headers="Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With" allow-credentials="true"/> </mvc:cors> </beans>
mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> <!-- 全局參數 --> <settings> <!-- 打印 SQL 語句 --> <setting name="logImpl" value="STDOUT_LOGGING" /> <!-- 使全局的映射器啓用或禁用緩存。 --> <setting name="cacheEnabled" value="false"/> <!-- 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"/> <!-- 當啓用時,有延遲加載屬性的對象在被調用時將會徹底加載任意屬性。不然,每種屬性將會按須要加載。 --> <setting name="aggressiveLazyLoading" value="true"/> <!-- 是否容許單條 SQL 返回多個數據集 (取決於驅動的兼容性) default:true --> <setting name="multipleResultSetsEnabled" value="true"/> <!-- 是否可使用列的別名 (取決於驅動的兼容性) default:true --> <setting name="useColumnLabel" value="true"/> <!-- 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。 default:false --> <setting name="useGeneratedKeys" value="false"/> <!-- 指定 MyBatis 如何自動映射 數據基表的列 NONE:不映射 PARTIAL:部分 FULL:所有 --> <setting name="autoMappingBehavior" value="PARTIAL"/> <!-- 這是默認的執行類型 (SIMPLE: 簡單; 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) --> <setting name="defaultExecutorType" value="SIMPLE"/> <!-- 使用駝峯命名法轉換字段。 --> <setting name="mapUnderscoreToCamelCase" value="true"/> <!-- 設置本地緩存範圍 session:就會有數據的共享 statement:語句範圍 (這樣就不會有數據的共享 ) defalut:session --> <setting name="localCacheScope" value="SESSION"/> <!-- 設置 JDBC 類型爲空時,某些驅動程序 要指定值, default:OTHER,插入空值時不須要指定類型 --> <setting name="jdbcTypeForNull" value="NULL"/> </settings> </configuration>
逆向工程(一鍵生成實體類、sql語句、接口)
pom文件
<dependency> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-core</artifactId> <version>1.3.7</version> </dependency> <build> <plugins> <!-- mybatis逆向工程插件 --> <plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.5</version> <dependencies> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.16</version> </dependency> </dependencies> <configuration> <!--配置文件的路徑--> <configurationFile>src/main/resources/generator/generatorConfig.xml</configurationFile> <overwrite>true</overwrite> </configuration> </plugin> </plugins> <!-- 解決配置文件不生效問題--> <resources> <resource> <includes> <include>**/*.*</include> </includes> <directory>src/main/resources</directory> </resource> </resources> </build>
配置文件
generatorConfig.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <generatorConfiguration> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressDate" value="false"/> <!-- 是否去除自動生成的註釋 true:是 : false:否 --> <property name="suppressAllComments" value="true"/> </commentGenerator> <!--數據庫連接URL,用戶名、密碼 --> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/beitong?serverTimezone=Asia/Shanghai" userId="root" password="101203"> <!--<property name="serverTimezone" value="UTC"/>--> <property name="nullCatalogMeansCurrent" value="true"/> </jdbcConnection> <!--指定生成entity實體類的具體位置--> <javaModelGenerator targetPackage="com.alfred.domain" targetProject="./src/main/java"> <property name="enableSubPackages" value="true"/> <property name="trimStrings" value="true"/> </javaModelGenerator> <!--指定生成mybatis映射xml文件的包名和位置--> <sqlMapGenerator targetPackage="mapper" targetProject="./src/main/resources"> <property name="enableSubPackages" value="true"/> </sqlMapGenerator> <!--指定生成mapper接口的具體位置--> <javaClientGenerator targetPackage="com.alfred.mapper" targetProject="./src/main/java" type="XMLMAPPER"> <property name="enableSubPackages" value="true"/> </javaClientGenerator> <!--<!– 要生成entity/mapper的表名及自定義的DO名 –>--> <!--<table tableName="users" domainObjectName="User"/>--> <!--<table tableName="product_brand" domainObjectName="ProductBrand" />--> <!--mybatis generator代碼生成器在默認的狀況下會生成對於表實體類的一個Examle類, 能夠更改生成器的配置可避免生成Examle類, enableCountByExample,enableUpdateByExample,enableDeleteByExample,enableSelectByExample等配置爲false後, 就不會生成生成Examle類了 --> <!--<table tableName="user" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/> <table tableName="commodity" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/>--> <table tableName="orders" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/> <!--<table tableName="orders_info" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/> <table tableName="cart" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/> <table tableName="user_address" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"/>--> </context> </generatorConfiguration>