第一个iBATIS

基于ibatis-2.3.0.677版本。
1、创建新的项目，并引入jar包
a) ibatis-2.3.0.677.jar
b) mysql驱动

2、在类路径中提供ibatis的配置文件：sqlMapConfig.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE sqlMapConfig      
    PUBLIC "-//ibatis.apache.org//DTD SQL Map Config 2.0//EN"      
    "http://ibatis.apache.org/dtd/sql-map-config-2.dtd">

<sqlMapConfig>

  <transactionManager type="JDBC" commitRequired="false">
    <dataSource type="SIMPLE">
      <property name="JDBC.Driver" value="com.mysql.jdbc.Driver"/>
      <property name="JDBC.ConnectionURL" value="jdbc:mysql://127.0.0.1/crm"/>
      <property name="JDBC.Username" value="root"/>
      <property name="JDBC.Password" value="mysql"/>
    </dataSource>
  </transactionManager>
  <sqlMap resource="com/bjsxt/crm/model/User.xml"/>

</sqlMapConfig>

3、创建实体类：User.java

package com.app.model;

public class User {
	private int id;
	private String username;
	private String password;
	
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
}

4、创建针对User对象的CRUD的xml映射配置:User.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE sqlMap      
    PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"      
    "http://ibatis.apache.org/dtd/sql-map-2.dtd">

<sqlMap>

  <!-- Use type aliases to avoid typing the full classname every time. -->
  <typeAlias alias="User" type="com.app.model.User"/>

  <!-- Select with no parameters using the result map for Account class. -->
  <select id="selectAllUsers" resultClass="User">
    select * from t_user
  </select>
  
  <select id="selectUser" resultClass="User" parameterClass="int">
  	select * from t_user where id=#id#
  </select>
  
  <insert id="insertUser" parameterClass="User">
  	insert into t_user values (
  		null,#username#,#password#
  	)
  </insert>
  
  <update id="updateUser" parameterClass="User">
  	update t_user set username = #username#,password=#password#
  	where id=#id#
  </update>
  
  <delete id="deleteUser" parameterClass="int">
  	delete from t_user where id=#id#
  </delete>
</sqlMap>

5、创建测试程序测试：

package com.app.model;

import java.io.Reader;
import java.util.Iterator;
import java.util.List;

import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;

/**
 * 最简单的形式！
 * @author Lee
 *
 */
public class UserTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception{

		//从配置文件中得到SqlMapClient对象 
		Reader reader = Resources.getResourceAsReader("sqlMapConfig.xml");
		SqlMapClient sqlMapper = SqlMapClientBuilder.buildSqlMapClient(reader);
		reader.close();
		
		//创建用户数据
		for(int i=0; i<10; i++){
			User user = new User();
			user.setUsername("用户"+i);
			user.setPassword("密码"+i);
			sqlMapper.insert("insertUser", user);
		}
		
		//查询用户数据
		List users = sqlMapper.queryForList("selectAllUsers");
		for (Iterator iter = users.iterator(); iter.hasNext();) {
			User user = (User) iter.next();
			System.out.println(user.getUsername());
		}
		
		//查询特定用户的数据
		User user = (User)sqlMapper.queryForObject("selectUser", 1);
		System.out.println("用户【id="+1+"】的名称是："+user.getUsername());
		
		//更新用户的信息
		user = new User();
		user.setId(3);
		user.setUsername("更改之后的用户名称");
		user.setPassword("密码被更改");
		sqlMapper.update("updateUser", user);
		
		//删除用户的信息
		sqlMapper.delete("deleteUser", 6);
	}

}