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

 

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posted on 2016-04-25 09:37  山冈龙  阅读(183)  评论(0编辑  收藏  举报

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