Spring+SpringMvc+Mybatis 框架的搭建(一)

本文是由於實習結束後學習到了新的技術,想寫下來和更多人交流。開發中遇到的問題我也會一一說明,但願有更多人能夠互相探討,加入到一塊兒來。css

1. Spring+SpringMvc +Mybatis 的做用有哪些:

  Spring做爲一個輕量級框架,開發使用已經有不少年了,很好用的底層框架。裏面的IOC,AOP詳細的我只能說會使用,不能給你們更詳細的說明。java

  Mybatis呢,主要是JDBC使用,鏈接數據庫。它比起hibernate來講我以爲配置文件少了不少,不須要去配置什麼數據庫方言啊,亂七八糟的東西。mysql

  SpringMvc感受更多的是像一個Spring精簡升級版,它裏面的應該就是配置文件中的啓動註解還有視圖的配置吧。web

 爲何要用這個框架而不是傳統的Spring+Struts+Hibernate呢? spring

  傳統的SSH以前也學習過,首先hibernate雖然很好用但是配置太過於複雜,不如Mybatis簡單明瞭(Mybatis的動態sql語句我以爲很實用);Struts呢太複雜!各類攔截器,處理緩存。真的配置都得配置好半天才能夠。而SSM則簡單了不少不少,適合小項目,本身聯繫時使用;sql

 

2.項目的配置:

  首先我使用的工具:數據庫

  編碼軟件:Eclipse  服務器:Tomcat  數據庫:Mysqlspring-mvc

  2.1在Eclipse中創建web工程

       

  2.2添加相應的架包

    因爲過多就不截圖,自出省略......緩存

  2.3 創建數據庫表

   

 3.項目的開發

  3.1 首先咱們須要將src中的po類至Service層寫好 順序爲entity—dao—mapper—Service

  

  3.2 這裏面須要注意的事項:

    3.2.1 CustomerMapper中的方法名須要和CustomerMapper.xml中的id一致;服務器

    

      3.2.2  在寫CustomerMapper.xml時 咱們須要配置namespace 的路徑是CustomerMapper.java的路徑,在resultMap中須要說明JdbcType和javaType類型

  

   3.2.3 編寫service即實現 

      service類代碼以下: 

1 package com.vivebest.service;
2 
3 import java.util.List;
4 
5 import com.vivebest.entity.Customer;
6 
7 public interface CustomerService {
8 public List<Customer> getAllCustomer();
9 }

         serviceImpl類代碼以下

 1 package com.vivebest.service.impl;
 2 
 3 import java.util.List;
 4 import org.springframework.beans.factory.annotation.Autowired;
 5 import org.springframework.stereotype.Service;
 6 import com.vivebest.dao.CustomerMapper;
 7 import com.vivebest.entity.Customer;
 8 import com.vivebest.service.CustomerService;
 9 
10 @Service("customerService")
11 public class CustomerServiceImpl implements CustomerService{
12 
13 @Autowired
14 private CustomerMapper customerMapper;
15 
16 @Override
17 public List<Customer> getAllCustomer() {
18 // TODO Auto-generated method stub
19 return customerMapper.getAllCustomer();
20 }
21 
22 }

須要用到@service 和@Autowired .其中@service表明標示爲服務層,@Autowired是Spring中自動裝配使用,Spring會直接將UserDao類型的惟一一個bean賦值給userDao這個成員變量;

 

4.配置文件的配置

  

  4.1  jdbc.properties :主要是用來配置數據庫信息

 1 #DB
 2 dataSource.driverClassName=com.mysql.jdbc.Driver
 3 dataSource.url=jdbc:mysql://localhost:3306/?
 4 dataSource.username = 5 dataSource.password = 6 
 7 dataSource.initialSize  =  2
 8 dataSource.maxActive = 30
 9 dataSource.maxIdle = 2
10 dataSource.minIdle = 2
11 dataSource.maxOpenPreparedStatements = 150
12 dataSource.validationQuery = SELECT 1 FROM DUAL
13 dataSource.testWhileIdle = true
14 dataSource.testOnBorrow = false
15 dataSource.testOnReturn = false
16 # \u914d\u7f6e\u95f4\u9694\u591a\u4e45\u624d\u8fdb\u884c\u4e00\u6b21\u68c0\u6d4b\uff0c\u68c0\u6d4b\u9700\u8981\u5173\u95ed\u7684\u7a7a\u95f2\u8fde\u63a5\uff0c\u5355\u4f4d\u662f\u6beb\u79d2 
17 dataSource.timeBetweenEvictionRunsMillis = 60000
18 # \u914d\u7f6e\u4e00\u4e2a\u8fde\u63a5\u5728\u6c60\u4e2d\u6700\u5c0f\u751f\u5b58\u7684\u65f6\u95f4\uff0c\u5355\u4f4d\u662f\u6beb\u79d2
19 dataSource.minEvictableIdleTimeMillis = 300000
20 # \u6253\u5f00PSCache\uff0c\u5e76\u4e14\u6307\u5b9a\u6bcf\u4e2a\u8fde\u63a5\u4e0aPSCache\u7684\u5927\u5c0f
21 dataSource.poolPreparedStatements = true
22 dataSource.maxPoolPreparedStatementPerConnectionSize = 20
23 # \u914d\u7f6e\u76d1\u63a7\u7edf\u8ba1\u62e6\u622a\u7684filter
24 dataSource.filters = stat

  4.2 applicationContext.xml :主要是用來配置Spring和Mybatis

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
 4     xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
 5     xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc"
 6     
 7     xsi:schemaLocation="
 8      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
 9      http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
10      http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.0.xsd
11      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
12      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
13      http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
14     <!-- 加載配置文件-->
15     <context:property-placeholder location="classpath:jdbc.properties"/>
16     <!-- 掃描控制包 -->
17     <context:component-scan base-package="com.vivebest.service" />
18     
19     <!--   ***************如下是dataSource 和 Mybatis配置******************  -->
20     <!-- dataSource -->
21     <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
22         <property name="driverClassName" value="${dataSource.driverClassName}"/>
23         <property name="url" value="${dataSource.url}"/>
24         <property name="username" value="${dataSource.username}" />
25         <property name="password" value="${dataSource.password}" />
26         <property name="initialSize" value="${dataSource.initialSize}"/>
27         <property name="maxActive" value="${dataSource.maxActive}"/>
28         <property name="maxWait" value="30000"/>
29         <property name="maxIdle" value="${dataSource.maxIdle}"/>
30         <property name="minIdle" value="${dataSource.minIdle}"/>
31         <property name="validationQuery" value="${dataSource.validationQuery}"/>
32         <property name="testWhileIdle" value="${dataSource.testWhileIdle}"/>
33         <property name="testOnBorrow" value="${dataSource.testOnBorrow}"/>
34         <property name="testOnReturn" value="${dataSource.testOnReturn}"/>
35         <property name="timeBetweenEvictionRunsMillis" value="${dataSource.timeBetweenEvictionRunsMillis}" />
36         <property name="minEvictableIdleTimeMillis" value="${dataSource.minEvictableIdleTimeMillis}" />
37         <property name="poolPreparedStatements" value="${dataSource.poolPreparedStatements}" />
38         <property name="maxPoolPreparedStatementPerConnectionSize" value="${dataSource.maxPoolPreparedStatementPerConnectionSize}" />
39         <property name="filters" value="${dataSource.filters}" />
40     </bean>
41     
42     <!-- define the SqlSessionFactory -->
43     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
44         <property name="dataSource" ref="dataSource" />
45         <property name="configLocation" value="classpath:mybatis-config.xml" />
46         <!-- 要映射類的包路徑 -->
47         <!--  <property name="typeAliasesPackage" value="com.vivebest.erp.entity" /> -->
48         <!-- 若無上條就須要有該配置 -->
49         <property name="mapperLocations" value="classpath:com/vivebest/mapper/CustomerMapper.xml"></property>  <!-- 當配置文件在其餘目錄時 -->
50     </bean>
51     
52     <!-- scan for mappers and let them be autowired -->
53     <!-- DAO接口所在包名,Spring會自動查找其下的類 -->  
54     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
55        <property name="basePackage" value="com.vivebest.dao"/>
56     </bean>     
57 
58 </beans>

須要注意的是:value=「」 填寫的是你*Mapper.xml文件的位置(個人是dao和mapper不在一個包下)

這樣application就配置成功了。

 4.3 web.xml配置(主要爲配置Spring)

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <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" id="WebApp_ID" version="3.0">
 3   <display-name>bankERP</display-name>
 4  <!-- Spring 服務層的配置文件 -->
 5     <context-param>
 6         <param-name>contextConfigLocation</param-name>
 7         <param-value>classpath:applicationContext.xml</param-value>
 8     </context-param>
 9 
10     <!-- Spring 容器啓動監聽器 -->
11     <listener>
12         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
13     </listener>
14                   
17     <!-- 配置spring核心servlet -->  
18     <servlet>  
19         <servlet-name>spring</servlet-name>  
20         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
21         <init-param>
22               <param-name>contextConfigLocation</param-name>
23               <param-value>classpath:spring-mvc.xml</param-value>
24         </init-param>     
25         <load-on-startup>1</load-on-startup>  
26     </servlet>  
27     
28     <!-- url-pattern配置爲/,不帶文件後綴,會形成其它靜態文件(js,css等)不能訪問。如配爲*.do,則不影響靜態文件的訪問 -->  
29     <servlet-mapping>  
30         <servlet-name>spring</servlet-name>  
31         <url-pattern>*.do</url-pattern>  
32     </servlet-mapping>  
33     
34     
35     <!-- encode filter 支持中文轉碼  -->
36     <filter>
37         <filter-name>characterEncodingFilter</filter-name>
38         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
39         <init-param>
40             <param-name>encoding</param-name>
41             <param-value>UTF-8</param-value>
42         </init-param>
43         <init-param>
44             <param-name>forceEncoding</param-name>
45             <param-value>true</param-value>
46         </init-param>
47     </filter>
48     <filter-mapping>
49         <filter-name>characterEncodingFilter</filter-name>
50         <url-pattern>/*</url-pattern>
51     </filter-mapping>
52     57 </web-app>
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