1、mybatis 通过mybatis-generator-core-1.3.2 代码生成：
工具下载地址：
https://code.google.com/p/mybatis/
解压工具包 mybatis-generator-core-1.3.2 找到lib目录 添加 配置文件，根据文档说明执行代码生成：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"> <!-- 使用说明： cmd cd 安装包存放路径 eg: cd C:MybatisCodeBuildToollib 执行： java -jar mybatis-generator-core-1.3.2.jar -configfile 配置文件.xml -overwrite --> <generatorConfiguration> <!-- 陪在数据库连接驱动 --> <classPathEntry location="mysql-connector-java-5.1.22-bin.jar" /> <context id="DB2Tables" targetRuntime="MyBatis3"> <commentGenerator> <property name="suppressDate" value="true" /> </commentGenerator> <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost/mybatistest" userId="root" password="wangkun"> </jdbcConnection> <javaTypeResolver> <property name="forceBigDecimals" value="false" /> </javaTypeResolver> <!-- model 实体代码生成： targetPackage：命名空间 targetProject：生成文件目录（需要存在目录） --> <javaModelGenerator targetPackage="com.rhythmk.model" targetProject="javacodedir"> <property name="enableSubPackages" value="true" /> <property name="trimStrings" value="true" /> </javaModelGenerator> <sqlMapGenerator targetPackage="com.rhythmk.dao" targetProject="javacodedir"> <property name="enableSubPackages" value="true" /> </sqlMapGenerator> <javaClientGenerator type="XMLMAPPER" targetPackage="com.rhythmk.dao" targetProject="javacodedir"> <property name="enableSubPackages" value="true" /> </javaClientGenerator> <!--- table 代码配置： tableName： 数据库表名 domainObjectName： 映射对象名 通过下面配置选择生成操作方法,默认为true enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" --> <table tableName="MyUser" domainObjectName="MyUser" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" > <!-- ignoreColumn : 排除属性 ---> <ignoreColumn column="Age" /> </table> </context> </generatorConfiguration>
2、mybatis 增改查：
项目结构：
config.properties：
db.driver=com.mysql.jdbc.Driver db.url=jdbc:mysql://localhost:3306/mybatistest?useUnicode=true&characterEncoding=UTF-8&zeroDateTimeBehavior=convertToNull db.user=root db.pass=wangkun
SqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 引入配置文件 -->
<properties resource="config.properties"></properties>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="${db.driver}" />
<property name="url" value="${db.url}" />
<property name="username" value="${db.user}" />
<property name="password" value="${db.pass}" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com/rhythmk/dao/MyUserMapper.xml"/>
</mappers>
</configuration>
MyUserMapper.xml：
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.rhythmk.dao.MyUserMapper"> <resultMap id="BaseResultMap" type="com.rhythmk.model.MyUser"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> <id column="ID" jdbcType="TINYINT" property="id" /> <result column="UserName" jdbcType="VARCHAR" property="username" /> <result column="CreateTime" jdbcType="TIMESTAMP" property="createtime" /> </resultMap> <sql id="Base_Column_List"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> ID, UserName, CreateTime </sql> <select id="selectByPrimaryKey" parameterType="java.lang.Byte" resultMap="BaseResultMap"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> select <include refid="Base_Column_List" /> from myuser where ID = #{id,jdbcType=TINYINT} </select> <delete id="deleteByPrimaryKey" parameterType="java.lang.Byte"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> delete from myuser where ID = #{id,jdbcType=TINYINT} </delete> <insert id="insert" parameterType="com.rhythmk.model.MyUser"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> insert into myuser (ID, UserName, CreateTime ) values (#{id,jdbcType=TINYINT}, #{username,jdbcType=VARCHAR}, #{createtime,jdbcType=TIMESTAMP} ) </insert> <insert id="insertSelective" parameterType="com.rhythmk.model.MyUser"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> insert into myuser <trim prefix="(" suffix=")" suffixOverrides=","> <if test="id != null"> ID, </if> <if test="username != null"> UserName, </if> <if test="createtime != null"> CreateTime, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides=","> <if test="id != null"> #{id,jdbcType=TINYINT}, </if> <if test="username != null"> #{username,jdbcType=VARCHAR}, </if> <if test="createtime != null"> #{createtime,jdbcType=TIMESTAMP}, </if> </trim> </insert> <update id="updateByPrimaryKeySelective" parameterType="com.rhythmk.model.MyUser"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> update myuser <set> <if test="username != null"> UserName = #{username,jdbcType=VARCHAR}, </if> <if test="createtime != null"> CreateTime = #{createtime,jdbcType=TIMESTAMP}, </if> </set> where ID = #{id,jdbcType=TINYINT} </update> <update id="updateByPrimaryKey" parameterType="com.rhythmk.model.MyUser"> <!-- WARNING - @mbggenerated This element is automatically generated by MyBatis Generator, do not modify. --> update myuser set UserName = #{username,jdbcType=VARCHAR}, CreateTime = #{createtime,jdbcType=TIMESTAMP} where ID = #{id,jdbcType=TINYINT} </update> <!-- 设置 参数类型为Map 则可以通过 Map<String,Object> 进行参数化 传值， 同时 parameterType 也可以设置为具体的 JaveBean类型 如上面方法进行查询传值 --> <select id="selectUser" parameterType="Map" resultMap="BaseResultMap"> select <include refid="Base_Column_List" /> from myuser where ID = #{id,jdbcType=TINYINT} And UserName=#{UserName} </select> </mapper>
测试代码：
private static SqlSessionFactory sqlSessionFactory = null;
static{
try {
InputStream is= org.apache.ibatis.io.Resources.getResourceAsStream("SqlMapConfig.xml");
sqlSessionFactory=new SqlSessionFactoryBuilder().build(is);
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
}
/**
* 添加数据
*/
public static void testInsert()
{
SqlSession session=sqlSessionFactory.openSession();
MyUser user=new MyUser();
user.setCreatetime(new Date());
user.setUsername("RHYTHMK");
session.insert("insert",user);
session.commit();
}
/**
* 查询数据
*/
public static void testSelectOne()
{
SqlSession session=sqlSessionFactory.openSession();
try {
MyUser user=session.selectOne("selectByPrimaryKey",1);
System.out.printf(user.getUsername());
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}finally{
session.close();
}
}
/**
* 修改数据
*/
public static void testUpdate()
{
SqlSession session=sqlSessionFactory.openSession();
MyUser user=new MyUser();
user.setCreatetime(new Date());
user.setUsername("RHYTHMK_update");
user.setId(Byte.parseByte("1"));
session.insert("updateByPrimaryKeySelective",user);
session.commit();
}
public static void testSelectByMap()
{
Map<String,Object> map=new HashMap<String, Object>();
map.put("id", "2");
map.put("UserName", "wangk2");
SqlSession session=sqlSessionFactory.openSession();
MyUser user=(MyUser)session.selectOne("selectUser", map) ;
System.out.println("testSelect:"+user.getId().toString());
}
相关代码：
http://pan.baidu.com/s/1raUGs