Mybatis技术（二） MyBatis-Spring
Mybatis技术（二） MyBatis-Spring
博客分类：
[*]Mybatis技术内幕
MyBatis-Spring整合环境搭建
Mybaits为什么要整合Spring?
说白了其实就想使用Spring提供的服务，比如Spring的事务管理、Spring的IOC对Bean进行管理等。
Mybatis怎么整合Spring?
由于目前Spring官方还没有出整合Mybatis的特性，所以这里在Spring框架和MyBatis框架上再添加用于整合的框架“mybatis-spring-1.0.2.jar” (该框架时MyBatis官方自己出的)。
（1）新建一个Web工程，名称为MybatisSpring。
（2）将Spring3.0.3、Mybatis3.0.6、Mybatis－Spring1.0.2、log4j、Oracle驱动和DBCP连接池的JAR包放到Web工程的lib下面，具体的JAR包如下：
Java代码
[*]classes12.jar
[*]log4j-1.2.16.jar
[*]mybatis-3.0.6.jar
[*]mybatis-spring-1.0.2.jar
[*]org.springframework.aop-3.0.3.RELEASE.jar
[*]org.springframework.asm-3.0.3.RELEASE.jar
[*]org.springframework.aspects-3.0.3.RELEASE.jar
[*]org.springframework.beans-3.0.3.RELEASE.jar
[*]org.springframework.context-3.0.3.RELEASE.jar
[*]org.springframework.context.support-3.0.3.RELEASE.jar
[*]org.springframework.core-3.0.3.RELEASE.jar
[*]org.springframework.expression-3.0.3.RELEASE.jar
[*]org.springframework.jdbc-3.0.3.RELEASE.jar
[*]org.springframework.transaction-3.0.3.RELEASE.jar
[*]org.springframework.web-3.0.3.RELEASE.jar
[*]commons-logging-1.1.1.jar
[*]commons-dbcp-1.2.jar
[*]commons-pool-1.4.jar
（3）在src下面新建log4j.properties文件，该文件的内容如下：
Java代码
[*]log4j.appender.stdout=org.apache.log4j.ConsoleAppender
[*]log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
[*]log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] -%m%n
[*]log4j.logger.com.ibatis=debug
[*]log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=debug
[*]log4j.logger.com.ibatis.common.jdbc.ScriptRunner=debug
[*]log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=debug
[*]log4j.logger.java.sql.Connection=debug
[*]log4j.logger.java.sql.Statement=debug
[*]log4j.logger.java.sql.PreparedStatement=debug,stdout
（4）在Oracle数据库执行以下SQL，创建一个USER_INFO的表：
Java代码
[*]-- Create table
[*]create table USER_INFO
[*](
[*] ID NUMBER(12) not null,
[*] NAME VARCHAR2(50)
[*]);
[*]
[*]--Insert data
[*]insert into USER_INFO(ID,NAME) values(1,'张三');
（5）新建一个Java类UserInfo.java，该类的内容如下：
Java代码
[*]package com.user;
[*]
[*]public class UserInfo {
[*] private int id;
[*] private String name;
[*]
[*] public UserInfo() {
[*] }
[*]
[*] public UserInfo(String name) {
[*] this(0, name);
[*] }
[*]
[*] public UserInfo(int id, String name) {
[*] this.id = id;
[*] this.name = name;
[*] }
[*]
[*] public int getId() {
[*] return id;
[*] }
[*]
[*] public void setId(int id) {
[*] this.id = id;
[*] }
[*]
[*] public String getName() {
[*] return name;
[*] }
[*]
[*] public void setName(String name) {
[*] this.name = name;
[*] }
[*]
[*] @Override
[*] public String toString() {
[*] return "ID: " + id + ", Name: " + name;
[*] }
[*]}
（6）在com.user.sqlmap下面新建UserInfo.xml文件，该文件的内容如下：
Java代码
[*]<?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="User">
[*] <select id="selectUser" parameterType="int" resultType="UserInfo">
[*] <!
[*] select * from user_info where id = #{id}
[*] ]]>
[*] </select>
[*]</mapper>
（7）在src下面新建mybatis.cfg.xml文件，该文件的内容如下：
Java代码
[*]<?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>
[*] <typeAliases>
[*] <typeAlias alias="UserInfo" type="com.user.UserInfo" />
[*] </typeAliases>
[*]
[*] <mappers>
[*] <mapper resource="com/user/sqlmap/UserInfo.xml" />
[*] </mappers>
[*]</configuration>
（8）新建一个Java类UserService.java，该类的内容如下：
Java代码
[*]package com.user;
[*]
[*]import org.mybatis.spring.SqlSessionTemplate;
[*]
[*]public class UserService {
[*] private SqlSessionTemplate sqlSession;
[*]
[*] public SqlSessionTemplate getSqlSession() {
[*] return sqlSession;
[*] }
[*]
[*] public void setSqlSession(SqlSessionTemplate sqlSession) {
[*] this.sqlSession = sqlSession;
[*] }
[*]
[*] public UserInfo selectUser(){
[*] UserInfo user = null;
[*] try {
[*] user = (UserInfo) sqlSession.selectOne("User.selectUser", "1");
[*] } catch (Exception e) {
[*] e.printStackTrace();
[*] }
[*]
[*] return user;
[*] }
[*]}
（9）在src下面新建applicationContext.xml文件，该文件的内容如下：
Java代码
[*]<?xml version="1.0" encoding="UTF-8"?>
[*]<beans xmlns="http://www.springframework.org/schema/beans"
[*] default-autowire="byName"
[*] 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-3.0.xsd">
[*]
[*] <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
[*] <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
[*] <property name="url" value="jdbc:oracle:thin:@localhost:1521:SID" />
[*] <property name="username" value="xxxx" />
[*] <property name="password" value="xxxx" />
[*] <property name="maxActive" value="100"></property>
[*] <property name="maxIdle" value="30"></property>
[*] <property name="maxWait" value="500"></property>
[*] <property name="defaultAutoCommit" value="true"></property>
[*] </bean>
[*]
[*] <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
[*] <property name="configLocation" value="classpath:mybatis.cfg.xml"></property>
[*] <property name="dataSource" ref="dataSource" />
[*] </bean>
[*]
[*] <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
[*] <constructor-arg index="0" ref="sqlSessionFactory" />
[*] </bean>
[*]
[*] <bean id="userService" class="com.user.UserService">
[*] <property name="sqlSession" ref="sqlSessionTemplate" />
[*] </bean>
[*]
[*]</beans>
（10）新建一个测试Java类UserInfoTest.java，该类的具体内容如下：
Java代码
[*]package com.user;
[*]
[*]import java.io.IOException;
[*]
[*]import org.springframework.context.ApplicationContext;
[*]import org.springframework.context.support.ClassPathXmlApplicationContext;
[*]
[*]
[*]
[*]public class UserInfoTest {
[*]
[*] /**
[*] * @param args
[*] * @throws IOException
[*] */
[*] public static void main(String[] args) throws IOException {
[*] ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
[*] UserService userService = (UserService)context.getBean("userService");
[*] UserInfo userInfo = userService.selectUser();
[*] System.out.println(userInfo);
[*]
[*] }
[*]
[*]}
（11）右键UserInfoTest 类，选择Run As Application，运行MyBaits操作数据库。
Java代码
[*]log4j:WARN No appenders could be found for logger (org.springframework.context.support.ClassPathXmlApplicationContext).
[*]log4j:WARN Please initialize the log4j system properly.
[*]log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[*]2012-02-11 21:13:42,156 DEBUG -==> Executing: select * from user_info where id = ?
[*]2012-02-11 21:13:42,156 DEBUG -==> Parameters: 1(String)
[*]ID: 1, Name: 张三
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