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/。