Mybatis使用篇之四：整合Spring

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：

 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：

 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：

 

 -- 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：

 

 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：

 

 <?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" >
     <![CDATA[
         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：

 <?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：

 

 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：

 <?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：

 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。

 

 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 [java.sql.PreparedStatement] -==>  Executing: select * from user_info where id = ?
 2012 - 02 - 11   21 : 13 : 42 , 156  DEBUG [java.sql.PreparedStatement] -==> Parameters:  1 (String)
 ID: 1 , Name: 张三