ibatis例子（一）

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

"1.0" encoding="UTF-8" ?>


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



  "JDBC" commitRequired="false">
    "SIMPLE">
      "JDBC.Driver" value="com.mysql.jdbc.Driver"/>
      "JDBC.ConnectionURL" value="jdbc:mysql://127.0.0.1/crm"/>
      "JDBC.Username" value="root"/>
      "JDBC.Password" value="mysql"/>


  "com/bjsxt/crm/model/User.xml"/>

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;
    }
}

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

"1.0" encoding="UTF-8" ?>


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




  "User" type="com.app.model.User"/>


  "selectAllUsers" resultClass="User">
    select * from t_user


  "selectUser" resultClass="User" parameterClass="int">
    select * from t_user where id=#id#


  "insertUser" parameterClass="User">
    insert into t_user values (
        null,#username#,#password#
    )


  "updateUser" parameterClass="User">
    update t_user set username = #username#,password=#password#
    where id=#id#


  "deleteUser" parameterClass="int">
    delete from t_user where id=#id#

  
  

  
  
    select * from t_user
  
  
  
  	select * from t_user where id=#id#
  
  
  
  	insert into t_user values (
  		null,#username#,#password#
  	)
  
  
  
  	update t_user set username = #username#,password=#password#
  	where id=#id#
  
  
  
  	delete from t_user where id=#id#
  

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);
    }

}