Spring + mybatis整合方案总结 结合实例应用

Spring + mybatis整合方案总结 结合实例应用

 

 

Spring + mybatis整合实例应用

项目结构图 (Spring3.0.2 +mybatis3.0.4)

方案一: 通过配置文件整合Spring和mybatis 
应用数据库

-- --数据库 tb_user -- 
drop table if exists tb_user; create table tb_user( id int primary key auto_increment comment '主键', username varchar(40) not null unique comment '用户名', password varchar(40) not null comment '密码', email varchar(40) comment '邮件', age int  comment '年龄', sex char(2) not null comment '性别' );

对应的实体类

package com.icreate.entity; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="mailto:[email protected]">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-9 上午11:15:50 * * @function： TODO * */
public class User { private int id; private String username; private String password; private String sex; private String email; private int age; //getter() and setter () 
}

数据Dao接口 

package com.icreate.dao; import java.util.List; import com.icreate.entity.User; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="mailto:[email protected]">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-9 上午11:36:34 * * @function： TODO * */
public interface UserDao { public int insert(User user); public int update(User user); public int delete(String userName); public List<User> selectAll(); public int countAll(); public User findByUserName(String userName); }

在config目录下进行Mapper文件配置

<?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.icreate.dao.UserDao">
    <select id="countAll" resultType="int">  <!-- 查询表中记录总数 --> select count(*) c from tb_user; </select>
    
    <select id="selectAll" resultType="com.icreate.entity.User">    <!-- 查询表中的所有用户 --> select * from tb_user order by username asc </select>
    
    <insert id="insert" parameterType="com.icreate.entity.User">    <!-- 向数据库中插入用户 --> insert into tb_user(username,password,email,sex,age) values(#{username},#{password},#{email},#{sex},#{age}) </insert>
    
    <update id="update" parameterType="com.icreate.entity.User">     <!-- 更新库中的用户 --> update tb_user set username=#{username},password=#{password},email=#{email},sex=#{sex},age=#{age} where username=#{username} </update>
    
    <delete id="delete" parameterType="String">    <!-- 删除用户 --> delete from tb_user where username=#{username} </delete>
    
    <select id="findByUserName" parameterType="String" resultType="com.icreate.entity.User"> <!-- 根据用户名查找用户 --> select * from tb_user where username=#{username} </select>
</mapper>

Mybatis应用配置文件MyBatis-Configuration.xml

<?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>
    <mappers>
        <mapper resource="com/icreate/dao/UserDao.xml"/>
    </mappers>
</configuration>

Spring配置文件,本例中我们放在/WebRoot/WEB-INF/applicationContext.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:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
         <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/db_mybatis?useUnicode=true&amp;characterEncoding=UTF-8&amp;zeroDateTimeBehavior=convertToNull"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
    </bean>
    
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" /> 
    </bean>
    
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="configLocation" value="classpath:MyBatis-Configuration.xml"></property>
        <property name="dataSource" ref="dataSource" />
    </bean>
    

    <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
         <property name="mapperInterface" value="com.icreate.dao.UserDao"></property>
         <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean>                
    
    <bean id="userService" class="com.icreate.service.impl.UserServiceImpl">
        <property name="userDao" ref="userDao"></property>
    </bean>

</beans>

同目录下的web.xml文件进行如下配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <context-param>
        <param-name>contextConfigLocation</param-name>
            <!-- applicationContext.xml文件在/WEB-INF/目錄下時可以這樣配置,-->
            <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    
    <!-- 配置上下文监听 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

配置说明:

<context-param/> 节点配置contextConfigLocation属性是为了让ContextLoaderListener找到Spring上下文的位置并加载它，如果不指定contextConfigLocation，ContextLoaderListener会到/WEB-INF/目录下找applicationContext.xml来加载。

<listener/>  节点上配了ContextLoaderListener。它实现了ServletContextListener接口，所以web server启动时ContextLoaderListener能读取到ServletContext，也就能通过<context-param/>指定的Spring上下文的路径来找到上下文并加载它。

当然，如果你不需要Spring来管理你的Bean，可以去掉上面两个节点。

定义service接口

package com.icreate.service; import java.util.List; import com.icreate.entity.User; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="mailto:[email protected]">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-9 下午03:52:07 * * @function： TODO * */
public interface UserService { public int insert(User user); public int update(User user); public int delete(String userName); public List<User> selectAll(); public int countAll(); public User findByUserName(String userName); }

实现service接口,执行dao操作

package com.icreate.service.impl; import java.util.List; import com.icreate.dao.UserDao; import com.icreate.entity.User; import com.icreate.service.UserService; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="mailto:[email protected]">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-9 下午03:53:26 * * @function： TODO * */
public class UserServiceImpl implements UserService{ private UserDao userDao; public UserDao getUserDao() { return userDao; } public void setUserDao(UserDao userDao) { this.userDao = userDao; } public int countAll() { return this.userDao.countAll(); } public int delete(String userName) { return this.userDao.delete(userName); } public User findByUserName(String userName) { return this.userDao.findByUserName(userName); } public int insert(User user) { return this.userDao.insert(user); } public List<User> selectAll() { return this.userDao.selectAll(); } public int update(User user) { return this.userDao.update(user); } }

接下来写我们的测试用例 

package com.icreate.service; import java.util.List; import org.junit.Before; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.FileSystemXmlApplicationContext; import com.icreate.entity.User; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="mailto:[email protected]">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-9 下午05:16:28 * * @function： TODO * */
public class SpringBatis { ApplicationContext context = null; UserService userService = null; @Before public void initContext(){ this.context = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml"); this.userService = (UserService) context.getBean("userService"); } @Test public void countAll(){ System.out.println("数据库中的记录条数:"  + userService.countAll()); } @Test public void insert(){ User user = new User(); user.setUsername("苏若年"); user.setPassword("passtest"); user.setEmail("[email protected]"); user.setSex("男"); user.setAge(23); userService.insert(user); } @Test public void selectAll(){ List<User> list = userService.selectAll(); for(int i=0; i<list.size(); i++){ User user = list.get(i); System.out.println("用户名:" + user.getUsername() + "\t密码:" + user.getPassword() + "\t邮箱：" + user.getEmail()); } } @Test public void update(){ User user = new User(); user.setUsername("苏若年"); user.setPassword("xxxxxxxx"); user.setEmail("xxxxxx@163xxx"); user.setSex("男"); user.setAge(23); userService.update(user); } @Test public void delete(){ userService.delete("苏若年"); } @Test public void findByName(){ User user = userService.findByUserName("苏若年"); System.out.println("用户名:" + user.getUsername() + "\t密码:" + user.getPassword() + "\t邮箱：" + user.getEmail()); } }

 

方案二:使用注解整合
这次将配置文件放置在config目录下.

数据库表与实体类同上

数据dao接口定义

package com.icreate.dao; import java.util.List; import org.apache.ibatis.annotations.Delete; import org.apache.ibatis.annotations.Insert; import org.apache.ibatis.annotations.Select; import org.apache.ibatis.annotations.Update; import com.icreate.entity.User; /** * * * @version ： 1.0 * * @author ： 苏若年 <a href="mailto:[email protected]">发送邮件</a> * * @since ： 1.0 创建时间: 2013-4-9 上午11:36:34 * * @function： TODO * */
public interface UserDao { @Insert("insert into tb_user(username,password,email,sex,age) values(#{username},#{password},#{email},#{sex},#{age})") public int insert(User user); @Update("update tb_user set username=#{username},password=#{password},email=#{email},sex=#{sex},age=#{age} where username=#{username}") public int update(User user); @Delete("delete from tb_user where username=#{username}") public int delete(String userName); @Select("select * from tb_user ") public List<User> selectAll(); @Select("select count(*) from tb_user") public int countAll(); @Select("select * from tb_user where username=#{username}") public User findByUserName(String userName); }

Service接口与实现不变.

Spring配置文件内容如下 

<?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:p="http://www.springframework.org/schema/p" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
    
    <!-- 配置数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
         <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://localhost:3306/db_mybatis?useUnicode=true&amp;characterEncoding=UTF-8&amp;zeroDateTimeBehavior=convertToNull"></property>
        <property name="username" value="root"></property>
        <property name="password" value="root"></property>
    </bean>
    
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" /> 
    </bean>
    
    
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
    </bean>
    

    <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
         <property name="mapperInterface" value="com.icreate.dao.UserDao"></property>
         <property name="sqlSessionFactory" ref="sqlSessionFactory"></property>
    </bean>                
    
    <bean id="userService" class="com.icreate.service.impl.UserServiceImpl">
        <property name="userDao" ref="userDao"></property>
    </bean>

</beans>

Web.xml文件配置如下

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <!-- applicationContext.xml文件在/WEB-INF/目錄下時可以這樣配置,-->
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- 配置上下文监听 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    
</web-app>

测试类大致上没有变化,只是ApplicationContext初始化的方法改变成了下面方式

    ApplicationContext context = null; UserService userService = null; @Before public void initContext(){ this.context = new ClassPathXmlApplicationContext("applicationContext.xml"); //this.context = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml");
        this.userService = (UserService) context.getBean("userService"); }

至此我们Spring与mybatis整合实例应用演示完毕

转载请注明出处:[http://www.cnblogs.com/dennisit/archive/2013/04/10/3012972.html]

热爱生活,热爱Coding,敢于挑战,用于探索 ...

 

分类:  JavaEE

标签:  spring,  mybatis