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