【ibatis】入门讲例

时间：2024-10-03 22:04:50

Ⅰ 、Ibatis项目机构

打开资源包，可以看到里面有一个simple_exzample的文件夹，在MyEclipse8.5中新建一个JAVA项目，将刚才的文件夹中内容复制到项目SRC下，这样的话呢，可以看到这样一个目录

aaarticlea/png;base64,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" alt="" width="357" height="229" />

Ⅱ、Ibatis的SQL语句配置类MySqlMapConfig.xml

<span style="font-size: medium;"><?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://127.0.0.1:3306/ibatis"/>

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

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

    </dataSource>

  </transactionManager>

  <sqlMap resource="com/mydomain/data/Employee.xml"/>

</sqlMapConfig>

</span>

使用的是MySQL数据库，所以要添加数据库驱动包，还有ibatis核心包，在看看数据库表该怎么建立，这得查看下Employee.xml了

Ⅲ、Employee.xml

<span style="font-size: medium;"><?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 namespace="Employee">

  <typeAlias alias="Employee" type="com.mydomain.domain.Employee"/>

  <resultMap id="AccountResult" class="Employee">

    <result property="id" column="ACC_ID"/>

    <result property="firstName" column="ACC_FIRST_NAME"/>

    <result property="lastName" column="ACC_LAST_NAME"/>

    <result property="emailAddress" column="ACC_EMAIL"/>

  </resultMap>

  <select id="selectAllAccounts" resultMap="AccountResult">

    select * from Employee

  </select>

  <select id="selectAccountById" parameterClass="int" resultClass="Employee">

    select

      ACC_ID as id,

      ACC_FIRST_NAME as firstName,

      ACC_LAST_NAME as lastName,

      ACC_EMAIL as emailAddress

    from Employee

    where ACC_ID = #id#

  </select>

  <insert id="insertAccount" parameterClass="Employee">

    insert into Employee (

      ACC_FIRST_NAME,

      ACC_LAST_NAME,

      ACC_EMAIL

    )values (

      #firstName#, #lastName#, #emailAddress#

    )

  </insert>

  <update id="updateAccount" parameterClass="Employee">

    update Employee set

      ACC_FIRST_NAME = #firstName#,

      ACC_LAST_NAME = #lastName#,

      ACC_EMAIL = #emailAddress#

    where

      ACC_ID = #id#

  </update>

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

    delete from Employee where ACC_ID = #id#

  </delete>

</sqlMap></span>

上面的<ResultMap>标签中有指定每个Account属性对应的数据库的列名，所以就新建数据库了
 这样数据建立完成后，我们就可以测试了，这回就用到了SimpleExample.java类了

Ⅳ、SimpleExample.java

package com.mydomain.data;

import com.ibatis.sqlmap.client.SqlMapClient;

import com.ibatis.sqlmap.client.SqlMapClientBuilder;

import com.ibatis.common.resources.Resources;

import com.mydomain.domain.Account;

import java.io.Reader;

import java.io.IOException;

import java.util.List;

import java.sql.SQLException;

public class SimpleExample {

  private static SqlMapClient sqlMapper;

  static {

    try {

      Reader reader = Resources.getResourceAsReader("com/mydomain/data/MySqlMapConfig.xml");

      sqlMapper = SqlMapClientBuilder.buildSqlMapClient(reader);

      reader.close();

    } catch (IOException e) {

      throw new RuntimeException("Something bad happened while building the SqlMapClient instance." + e, e);

    }

  }

  public static List selectAllAccounts () throws SQLException {

    return sqlMapper.queryForList("selectAllAccounts");

  }

  public static Account selectAccountById  (int id) throws SQLException {

    return (Account) sqlMapper.queryForObject("selectAccountById", id);

  }

  public static void insertAccount (Account account) throws SQLException {

    sqlMapper.insert("insertAccount", account);

  }

  public static void updateAccount (Account account) throws SQLException {

    sqlMapper.update("updateAccount", account);

  }

  public static void deleteAccount (int id) throws SQLException {

    sqlMapper.delete("deleteAccountById", id);

  }

}

像上面的增删改查中用到的代替SQL语句的映射KEY，也是可以加上相应的XML文件的配置名称的，如：return sqlMapper.queryForList("Employee.selectAllAccounts")那么这个Account就是Account.xml的名称了
真正想看到测试结果得另写个JUNIT测试类，添加junit的jar包，这里我写了MyTest.java

Ⅴ、MyTest.java

package com.mydomain.data;

import java.sql.SQLException;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import org.junit.Test;

import com.mydomain.domain.Account;

public class MyTest {

    @Test

    public void selectAllAccounts(){

        try {

            List list=SimpleExample.selectAllAccounts();

            System.out.println(Arrays.toString(list.toArray()));

        } catch (SQLException e) {

            e.printStackTrace();

        }

    }

    public void selectAccountById(){

        try {

            Account account=SimpleExample.selectAccountById(1);

            System.out.println(account);

        } catch (SQLException e) {

            e.printStackTrace();

        }

    }

    public void insertAccount(){

        Account account=new Account();

        account.setFirstName("tom");

        account.setLastName("jam");

        account.setEmailAddress("china");

        try {

            SimpleExample.insertAccount(account);

        } catch (SQLException e) {

            e.printStackTrace();

        }

    }

    public void updateAccount(){

        try {

            Account account=SimpleExample.selectAccountById(2);

            account.setFirstName("gates");

            SimpleExample.updateAccount(account);

        } catch (SQLException e) {

            e.printStackTrace();

        }

    }

    public void deleteAccount(){

        try {

            SimpleExample.deleteAccount(1);

        } catch (SQLException e) {

            e.printStackTrace();

        }

    }

}

Ⅵ、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/。 目前版本是3.0.2

相关文章