ibatis_note_1-优快云博客

本文介绍了一个简单的MyBatis入门示例，包括配置环境、创建User类、编写SqlMapConfig.xml配置文件、User.xml映射文件及查询操作。

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作为新手还是先照着做个小例子

一.导入ibatis包和mysql的jdbc包。

二.新建一个User类，包含id，name，sex。

三.写ibatis配置文件，SqlMapConfig.xml。

四.写sql映射的xml文件User.xml。

五.初始化配置文件并查询。

User.java

package com.forrest.ibatis.test.domain;

import java.io.Serializable;

public class User implements Serializable
{
	private Integer id;
	
	private String name;
	
	private Integer sex;

	public Integer getId()
	{
		return id;
	}

	public void setId(Integer id)
	{
		this.id = id;
	}

	public String getName()
	{
		return name;
	}

	public void setName(String name)
	{
		this.name = name;
	}

	public Integer getSex()
	{
		return sex;
	}

	public void setSex(Integer sex)
	{
		this.sex = sex;
	}
	
	
}

SqlMapConfig.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>  
        <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://localhost:3306/ibatis1"/>   
                   <property name="username" value="java"/>
                   <property name="password" value="java"/>    
               </dataSource>   
           </environment>   
       </environments>   
       <mappers>   
           <mapper resource="com/forrest/ibatis/test/User.xml"/>   
       </mappers>  
  </configuration>

User.xml

<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE mapper  
PUBLIC "-//ibatis.apache.org//DTD Mapper 3.0//EN"  
"http://ibatis.apache.org/dtd/ibatis-3-mapper.dtd">  
  
<mapper namespace="UserMapper">  
    <select id="selectOne" parameterType="java.lang.Integer" resultType="com.forrest.ibatis.test.domain.User">  
        select * from t_user where id = #{id}
    </select>  
</mapper>

main方法

public static void main(String[] args) throws IOException
	{
		String resource = "com/forrest/ibatis/test/SqlMapConfig.xml";
		Reader reader;
		reader = Resources.getResourceAsReader(resource);
		SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
		SqlSession sqlSession = sqlSessionFactory.openSession();
		User user = (User)sqlSession.selectOne("UserMapper.selectOne", "1");
		System.out.println(user.getId());
		System.out.println(user.getName());
		System.out.println(user.getSex());
	}