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  • mybatis3.2.3+spring整合

    先看下此文章使用的项目的目录结构:

    31020142443

    mybatis整合spring最简单的理解就是“mybatis数据源的配置、事务的管理、SqlSessionFactory的创建以及数据映射器接口Mapper的创建交由spring去管理”,所以mybatis的配置文件mybatis-config.xml中不需要再配置数据源及事务,在业务层service实现时不需要手动地获取SqlSession以及对应的数据映射器接口Mapper,通过spring的注入即可。

    1、准备工作:

    (1)、下载mybatis:http://code.google.com/p/mybatis/downloads/list?can=3&q=Product%3DMyBatis

    (2)、下载mybatis-spring:https://code.google.com/p/mybatis/downloads/detail?name=mybatis-spring-1.2.1.zip

    (3)、下载mysql-connector-java-5.1.14.jar

    (4)、mybatis-spring官方地址:http://mybatis.github.io/spring/

    2、创建一个User实体:

    package com.luoshengsha.bean;
    public class User {
     private String id;
     private String name;
     private String password;
    
     public String getId() {
     return id;
     }
     public void setId(String id) {
     this.id = id;
     }
     public String getName() {
     return name;
     }
     public void setName(String name) {
     this.name = name;
     }
     public String getPassword() {
     return password;
     }
     public void setPassword(String password) {
     this.password = password;
     }
    }

    3、创建userMapper:

    package com.luoshengsha.mapper;
    import com.luoshengsha.bean.User;
    public interface UserMapper {
      /**保存**/
      public void save(User user);
      /**修改**/
      public void update(User user);
      /**查找**/
      public User find(String id);
      /**删除**/
      public void delete(String id);
     }

    4、创建UserMapper.xml://跟UserMapper.java在同一目录下

    <?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.luoshengsha.mapper.UserMapper">
     <!-- 保存 -->
      <insert id="save" parameterType="user">
      insert into user(id,name,password) values(#{id},#{name},#{password})
      </insert>
     <!-- 更新 -->
      <update id="update" parameterType="user">
      update user set name=#{name},password=#{password} where id=#{id}
      </update>
     <!-- 查找 -->
      <select id="find" parameterType="string" resultType="user">
      select * from user where id=#{id}
      </select>
     <!-- 删除 -->
      <delete id="delete" parameterType="string">
      delete from user where id=#{id}
      </delete>
     </mapper>

    5、创建UserService:

    package com.luoshengsha.service;
    import com.luoshengsha.bean.User;
    public interface UserService {
      /**保存**/
      public void save(User user);
      /**修改**/
      public void update(User user);
      /**查找**/
      public User find(String id);
      /**删除**/
      public void delete(String id);
     }

    6、创建UserServiceImpl:

    package com.luoshengsha.service.impl;
    import javax.annotation.Resource;
    import org.springframework.stereotype.Service;
    import org.springframework.transaction.annotation.Transactional;
    import com.luoshengsha.bean.User;
    import com.luoshengsha.mapper.UserMapper;
    import com.luoshengsha.service.UserService;
    
    @Service //告诉spring这个业务组件
    @Transactional //告诉spring这个类需要事务
    public class UserServiceImpl implements UserService {
     @Resource
     private UserMapper mapper;
     
     @Override
     public void save(User user) {
     //此处不再进行创建SqlSession和提交事务,都已交由spring去管理了。
     mapper.save(user);
     }
    @Override
     public void update(User user) {
     //此处不再进行创建SqlSession和提交事务,都已交由spring去管理了。
     mapper.update(user);
     }
    @Override
     public User find(String id) {
     //此处不再进行创建SqlSession,都已交由spring去管理了。
     return mapper.find(id);
     }
    @Override
     public void delete(String id) {
     //此处不再进行创建SqlSession和提交事务,都已交由spring去管理了。
     mapper.delete(id);
     }
    }

    7、mybatis-config.xml配置文件:

    <?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>
     <!-- <properties resource="jdbc.properties" /> -->
     <settings>
     <!-- 全局启用或禁用延迟加载。当禁用时,所有关联对象都会即时加载。默认:true -->
     <setting name="lazyLoadingEnabled" value="true"/>
     <!-- 当启用时,有延迟加载属性的对象在被调用时将会完全加载任意属性。否则,每种属性将会按需要加载 -->
     <setting name="aggressiveLazyLoading" value="false"/>
     </settings>
    
    <!--//此处的配置不再需要
    <environments>...</environments>
    -->
    <typeAliases><!--设置别名-->
     <typeAlias type="com.luoshengsha.bean.User" alias="user"/>
     </typeAliases>
    
    <!--说明:如果xxMapper.xml配置文件放在和xxMapper.java统一目录下,mappers也可以省略,因为org.mybatis.spring.mapper.MapperFactoryBean默认会去查找与xxMapper.java相同目录和名称的xxMapper.xml--> 
    <mappers>
    <mapper resource="com/luoshengsha/Mapper/UserMapper.xml"/>
    </mappers>
    </configuration>

     8、spring配置文件bean.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:aop="http://www.springframework.org/schema/aop"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context-2.5.xsd
      http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
       <context:annotation-config />
      <aop:aspectj-autoproxy/> 
      <aop:aspectj-autoproxy proxy-target-class="true"/>
      
      <!--告诉spring从什么地方开始扫描组件,根据自己项目的实际目录配置-->
      <context:component-scan base-package="com.luoshengsha" />
      
      <!--数据源配置-->
      <context:property-placeholder location="classpath:jdbc.properties"/><!--从classpath下面的jdbc.properties中读取数据库的链接信息-->
      <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
      <property name="driverClass" value="${driver}"/>
      <property name="jdbcUrl" value="${url}"/>
      <property name="user" value="${username}"/>
      <property name="password" value="${password}"/>
      <!-- 初始化时获取的连接数,取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
      <property name="initialPoolSize" value="1"/>
      <!-- 连接池中保留的最小连接数。 -->
      <property name="minPoolSize" value="1"/> 
      <!-- 连接池中保留的最大连接数。Default: 15 -->
      <property name="maxPoolSize" value="300"/>
      <!-- 最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
      <property name="maxIdleTime" value="60"/> 
      <!-- 当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
      <property name="acquireIncrement" value="5"/> 
      <!-- 每60秒检查所有连接池中的空闲连接。Default: 0 -->
      <property name="idleConnectionTestPeriod" value="60"/>
      </bean>
    
      <!--把mybatis SqlSessionFactory的创建交由spring管理-->
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
      <property name="dataSource" ref="dataSource" /><!--数据源-->
      <property name="configLocation" value="classpath:mybatis-config.xml" /><!--mybatis配置文件路径-->
      </bean>
    
      <!-- scan for mappers and let them be autowired -->
      <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
      <property name="basePackage" value="com.luoshengsha.mapper" /><!---根据自己的项目路径配置-->
      </bean>
    
      <!--把mybatis的事务交由spring去管理-->
      <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
      <property name="dataSource" ref="dataSource" /><!--注意:此处的数据源要与sqlSessionFactory中的dataSource相同-->
      </bean>
    
     <!--启用spring @Transactional注解 -->
     <tx:annotation-driven />
    </beans>

    9、jdbc.properties配置文件:

     driver=org.gjt.mm.mysql.Driver
     url=jdbc:mysql://127.0.0.1:3306/mybatis?useUnicode=true&characterEncoding=UTF-8
     username=root
     password=root

    10、log4j.properties:

     log4j.rootLogger=debug, Console
     #Console
     log4j.appender.Console=org.apache.log4j.ConsoleAppender
     log4j.appender.Console.layout=org.apache.log4j.PatternLayout
     log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
     log4j.logger.java.sql.ResultSet=DEBUG
     log4j.logger.org.apache=DEBUG
     log4j.logger.java.sql.Connection=DEBUG
     log4j.logger.java.sql.Statement=DEBUG
     log4j.logger.java.sql.PreparedStatement=DEBUG

    11、web.xml配置文件:

    <?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
      <display-name>mybatisSpring</display-name>
      <welcome-file-list>
      <welcome-file>index.html</welcome-file>
      <welcome-file>index.htm</welcome-file>
      <welcome-file>index.jsp</welcome-file>
      <welcome-file>default.html</welcome-file>
      <welcome-file>default.htm</welcome-file>
      <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
    
      <!--告诉项目spring配置文件所处的位置-->
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:beans.xml</param-value>
      </context-param>
      
      <!-- spring监听器 -->
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
     </web-app>
    

    12、junit测试:

    package com.luoshengsha;
    import org.junit.BeforeClass;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    import com.luoshengsha.bean.User;
    import com.luoshengsha.service.UserService;
    public class UserTest {
    protected static UserService userService;
    
     @BeforeClass
     public static void setUpBeforeClass() throws Exception {
     try {
     ApplicationContext cxt = new ClassPathXmlApplicationContext("beans.xml");
     userService = (UserService)cxt.getBean("userServiceImpl");
     } catch (Exception e) {
     e.printStackTrace();
     }
     }
    
     @Test
     public void save() {
     User user = new User();
     user.setId("2");
     user.setName("绿竹");
     user.setPassword("123456");
     userService.save(user);
     }
    
     @Test
     public void find() {
     User user = userService.find("2");
     System.out.println("name: " + user.getName());
     }
    
     @Test
     public void update() {
     User user = userService.find("2");
     user.setName("绿竹2");
     userService.update(user);
     }
    
     @Test
     public void delete() {
     userService.delete("2");
     }
    }

    13、源码下载地址:http://pan.baidu.com/s/123Xd1

    本文出自 luoshengsha.com,欢迎转载,转载时请注明出处及相应链接。

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  • 原文地址:https://www.cnblogs.com/shsgl/p/5429769.html
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