JavaEE之mybatis代理开发模式

MyBatis 是一款优秀的持久层框架，它支持定制化 SQL、存储过程以及高级映射。MyBatis 避免了几乎所有的 JDBC 代码和手动设置参数以及获取结果集。MyBatis 可以使用简单的 XML 或注解来配置和映射原生信息，将接口和 Java 的 POJOs(Plain Old Java Objects,普通的
Java对象)映射成数据库中的记录。下面我简单说说怎么创建mybatis的代理开发模式：

第一步：创建一个空的Javaweb项目，这个我就不详细说了；

第二步：导包，这个我也就不详细说了；

第三步：创建Javabean：

package com.fengqi.vo;
import java.util.Date;
public class Users {
private Integer id;
private String user_name;
private Date user_birthday;
private String user_sex;
private Integer user_age;
private String user_addr;
private String user_iphone;
public Users() {

}
public Users(Integer id, String user_name, Date user_birthday,
String user_sex, Integer user_age, String user_addr,
String user_iphone) {
super();
this.id = id;
this.user_name = user_name;
this.user_birthday = user_birthday;
this.user_sex = user_sex;
this.user_age = user_age;
this.user_addr = user_addr;
this.user_iphone = user_iphone;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUser_name() {
return user_name;
}
public void setUser_name(String user_name) {
this.user_name = user_name;
}
public Date getUser_birthday() {
return user_birthday;
}
public void setUser_birthday(Date user_birthday) {
this.user_birthday = user_birthday;
}
public String getUser_sex() {
return user_sex;
}
public void setUser_sex(String user_sex) {
this.user_sex = user_sex;
}
public Integer getUser_age() {
return user_age;
}
public void setUser_age(Integer user_age) {
this.user_age = user_age;
}
public String getUser_addr() {
return user_addr;
}
public void setUser_addr(String user_addr) {
this.user_addr = user_addr;
}
public String getUser_iphone() {
return user_iphone;
}
public void setUser_iphone(String user_iphone) {
this.user_iphone = user_iphone;
}
@Override
public String toString() {
return "Users [id=" + id + ", user_name=" + user_name
+ ", user_birthday=" + user_birthday + ", user_sex=" + user_sex
+ ", user_age=" + user_age + ", user_addr=" + user_addr
+ ", user_iphone=" + user_iphone + "]";
}
}

第四步：创建接口：

package com.fengqi.dao;
import com.fengqi.vo.Users;
public interface UsersMapper {
//查找用户接口
public Users selectUser(String id);
//删除用户接口
public Users delectUser(int id);
//插入用户接口
public Users insertUser(Users user);
//修改用户接口
public Users updateUser(Users user);
}

第五步：创建mapper：

<?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.fengqi.dao.UsersMapper">
<!-- 查找用户 -->
<select id="selectUser" parameterType="String" resultType="Users">
select user_name from userss where id=#{id}
</select>
<!-- 删除用户 -->
<delete id="delectUser" parameterType="java.lang.Integer" >
delete from userss where id=#{id}
</delete>
<!-- 增加用户 -->
<insert id="insertUser" parameterType="com.fengqi.vo.Users">
insert into userss(id,user_name,user_birthday,user_sex,user_age,user_addr,user_iphone) values(#{id},#{user_name},#{user_birthday},#{user_sex},#{user_age},#{user_addr},#{user_iphone});
</insert>
<!-- 修改用户 -->
<update id="updateUser" parameterType="com.fengqi.vo.Users">
update userss set user_name=#{user_name},user_birthday=#{user_birthday},user_sex=#{user_sex},user_age=#{user_age},user_addr=#{user_addr},user_iphone=#{user_iphone}  where id=#{id}
</update>
</mapper>

第六步：创建全局配置文件：

<?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>
<!-- mybatis别名定义 -->
<typeAliases>
<typeAlias alias="Users" type="com.fengqi.vo.Users"/>
</typeAliases>
<!-- development 工厂模式 -->
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://127.0.0.1:3306/test?characterEncoding=utf-8"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<!-- mybatis的mapper文件，每个xml配置文件对应一个接口 -->
<mappers>
<mapper resource="com/fengqi/dao/UsersMapper.xml"/>
</mappers>
</configuration>

第七步：创建测试类：

package com.fengqi.test;
import java.io.IOException;
import java.io.Reader;
import java.sql.SQLException;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.fengqi.vo.Users;
public class UserTest {
public static void main(String[] args) throws SQLException, IOException{
String resource = "configuration.xml";
//加载配置文件
Reader reader = Resources.getResourceAsReader(resource);
//根据read获取SqlSessionFactory 对象
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(reader);
//根据SqlSessionFactory获
4000
取SqlSession对象
SqlSession session = sessionFactory.openSession();
try{
//根据ID查找用户
Users user = (Users)session.selectOne("com.fengqi.dao.UsersMapper.selectUser","3");
System.out.println("username:"+user.getUser_name());
//根据ID删除用户
/*session.delete("com.fengqi.dao.UsersMapper.delectUser",3);
session.commit();*/
//插入用户
/*Users ui = new Users(null,"archybold8",new Date(),"0",11,"陕西省西安市","18392357490");
session.insert("com.fengqi.dao.UsersMapper.insertUser",ui);
session.commit();*/
//更新用户
/*Users ui = new Users(14,"archy78",new Date(),"1",29,"陕西省西安市","18392357490");
session.update("com.fengqi.dao.UsersMapper.updateUser", ui);
session.commit();	*/
}finally{
//关闭session
session.close();
}
}
}

第八步：测试结果：



第八步：项目总览：