ibatis入门实例讲解

 

目录结构：

Test.java

package com.you.me;

import java.io.IOException;

import java.io.Reader;

import java.sql.SQLException;

import java.util.List;



import com.ibatis.common.resources.Resources;

import com.ibatis.sqlmap.client.SqlMapClient;

import com.ibatis.sqlmap.client.SqlMapClientBuilder;

/**

 * author:you.me 2010-12-22

 * 

 */

public class Test {

    static SqlMapClient sqlMapClient = null;

    static {

        try {

          Reader reader = 

             Resources.getResourceAsReader("com/you/me/SqlMapConfig.xml");

          sqlMapClient = SqlMapClientBuilder.buildSqlMapClient(reader);

        } catch (IOException e) {

          e.printStackTrace();

        }

    }

    public static void main(String[] args) 

        throws IOException, SQLException {

        /**查询FIND BY ID*/

//        User user = (User) sqlMapClient.queryForObject("getUser",new Integer(2));

//        System.out.println(user.getName());

        /**查询FIND ALL*/

//        List list = sqlMapClient.queryForList("getAllUser");

//        System.out.println(list.size());

        /**插入INSERT*/

//        User user = new User(3,"王五","male",25,"wangwu","123456");

//        sqlMapClient.insert("insertUser",user);

        /**删除DELETE*/

//        sqlMapClient.delete("deleteUser",new Integer(2));

        /**修改UPDATE*/

//        User user = new User(3,"王老五","male",24,"wanglaowu","123456");

//        sqlMapClient.update("updateUser",user);

        

    }

}

User.java

package com.you.me;



public class User {

    private int id;

    private String name;

    private String sex;

    private int age;

    private String username;

    private String password;

    public User() {

    }

    public User(int id, String name, String sex, int age, String username, String password) {

        super();

        this.id = id;

        this.name = name;

        this.sex = sex;

        this.age = age;

        this.username = username;

        this.password = password;

    }

    public int getId() {

        return id;

    }

    public void setId(int id) {

        this.id = id;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getSex() {

        return sex;

    }

    public void setSex(String sex) {

        this.sex = sex;

    }

    public int getAge() {

        return age;

    }

    public void setAge(int age) {

        this.age = age;

    }

    public String getUsername() {

        return username;

    }

    public void setUsername(String username) {

        this.username = username;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

db.properties 用于通过属性文件连接数据库。如果在SqlMapConfig.xml中直接连接数据库则不需要这个。

driver=com.mysql.jdbc.Driver

url=jdbc:mysql://192.168.1.74:3306/test

user=root

password=root

SqlMapConfig.xml 连接是的mysql数据库。需要加入mysq jar包mysql-connector-java-5.1.15-bin.jar 和ibatis核心包ibatis-2.3.4.726.jar

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

<!DOCTYPE sqlMapConfig 

 PUBLIC "-//iBATIS.com//DTD SQL Map Config 2.0//EN" 

 "http://www.ibatis.com/dtd/sql-map-config-2.dtd">

<sqlMapConfig>

    <properties resource="com/you/me/db.properties" />

    <transactionManager type="JDBC">

        <dataSource type="SIMPLE">

            <property name="JDBC.Driver" value="${driver}" /><!--通过属性文件连接数据库  -->

            <property name="JDBC.ConnectionURL" value="${url}" />

            <property name="JDBC.Username" value="${user}" />

            <property name="JDBC.Password" value="${password}" />

       <!-- <property name="JDBC.Driver" value="com.mysql.jdbc.Driver" />

            <property name="JDBC.ConnectionURL" value="jdbc:mysql://192.168.1.74:3306/test" />

            <property name="JDBC.Username" value="root" />

            <property name="JDBC.Password" value="root" /> -->

        </dataSource>

    </transactionManager>

    <sqlMap resource="com/you/me/User.xml" />

</sqlMapConfig>

<!-- SqlMapConfig.xml是ibatis连接数据库的配置文件  -->

User.xml

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

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

<sqlMap namespace="User">

    <!--

    create table temp_user ( 

        id number primary key , 

        name varchar2(30),

        sex varchar2(10), 

        age number , 

        username varchar2(30), 

        password varchar2(30));

    insert into temp_user

        values(1,'张三','male',23,'zhangsan','123456');

    insert into temp_user

        values(2,'李四','male',23,'lisi','123456'); 

    commit;

    -->

    <select id="getUser" parameterClass="int" resultClass="com.you.me.User"><!--parameterClass传值参数类型   resultClass返回值类型-->

        select id,name,sex,age,username,password 

        from temp_user 

        where id = #id#

    </select>

    <select id="getAllUser" resultClass="java.util.List">

        select id,name,sex,age,username,password 

        from temp_user 

    </select>

    <insert id="insertUser" parameterClass="com.you.me.User">

        insert into temp_user

        values(#id#,#name#,#sex#,#age#,#username#,#password#)

    </insert>

    <delete id="deleteUser" parameterClass="int">

        delete from temp_user

        where id = #id#

    </delete>

    <update id="updateUser" parameterClass="com.you.me.User">

        update temp_user set 

         name = #name# ,

         age = #age# ,

         username = #username# , 

         password = #password#

        where id =#id#

    </update>

</sqlMap>

 

 

怎么样，ibatis也不是很难吧，将所有的SQL语句统一管理起来，十分方便，对于写复杂的SQL语句也可以直接来写

 

 顺便介绍下MyBatis

MyBatis来源于iBATIS，iBATIS是一个由Clinton Begin在2001年发起的开放源代码项目，iBATIS一词来源于“internet”和“abatis”的组合。该项目最初侧重于密码软件的开发，现在是一个基于Java的持久层框架。iBATIS提供的持久层框架包括SQL Maps和Data Access Objects（DAO），它是著名的ORM开发框架，分为Java和.NET版本，有着众多的追随者。

iBATIS更名为MyBatis并迁移到Google Code，此次项目迁移后，将启用新的网站http://www.mybatis.org/，由于目前只是改了名字，因此仍然可直接浏览iBatis的文档。

MyBatis开发团队希望脱离Apache而独立发展，并保证不会修改授权协议（Apache License）、代码完全兼容、包名不会更改、也不会删除 Apache站上的任何相关资源。

改名后的第一次版本MyBatis 3.0.1已经发布，基于iBatis 3.0版本，该版本非常稳定，已经有很多用户使用了数周时间，修复了一些小bug。欲下载 MyBatis 3.0.1请到它新的网站http://www.mybatis.org/。