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:DennisIT@163.com">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:DennisIT@163.com">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&characterEncoding=UTF-8&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:DennisIT@163.com">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:DennisIT@163.com">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:DennisIT@163.com">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("dennisit@163.com");
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:DennisIT@163.com">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&characterEncoding=UTF-8&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:[http://www.cnblogs.com/dennisit/archive/2013/04/10/3012972.html]