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1.首先第一步.部署mybatis ;
1.1 下载myBatis
MyBits前身是iBitis,相对于Hibernate而言,它是半自动化ORM框架。由于老板对性能要求的比较苛刻,不得不放弃我亲爱的hibernate,转而学习并使用mybatis,在此之前我对mybatis也并不熟悉,如有不对的地方,欢迎指正，也希望对想学习mybitis的同窗们有所帮助。
鉴于我的测试数据库是mysql，同仁们现在把mysql装好，然后准备好mysql驱动以及 下载mybitis(http://code.google.com/p/mybatis/)。
我用的是maven. 就直接在pom 文件里面写了.
<dependencies>
<!-- db -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.5</version>
</dependency>
<!-- 加入mysql驱动依赖包 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.25</version>
</dependency>
2.新建数据表
DROP TABLE IF EXISTS `t_test`; CREATE TABLE `t_test` ( `id` int(11) NOT NULL, `userName` varchar(255) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of t_test -- ---------------------------- INSERT INTO `t_test` VALUES (‘1‘, ‘2‘);
3.用mybatis-generator 自动生成代码
创建一个配置文件，如conf.xml，此处文件名自己命名，没有命名方面的特殊要求， 可以参考doc文档里的配置文件写的，我的如下
<?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">
<generatorConfiguration>
<!-- 数据库驱动包位置 -->
<!-- <classPathEntry location="D:\software\lib\mysql-connector-java-5.1.21.jar" /> -->
<classPathEntry location="E:\data\.m2\repository\mysql\mysql-connector-java\5.1.25\mysql-connector-java-5.1.25.jar" />
<context id="DB2Tables" targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressAllComments" value="true" />
</commentGenerator>
<!-- 数据库链接URL、用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/c_sai" userId="root" password="">
<!--<jdbcConnection driverClass="oracle.jdbc.driver.OracleDriver" connectionURL="jdbc:oracle:thin:@localhost:1521:orcl" userId="msa" password="msa">-->
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!-- 生成模型的包名和位置 -->
<javaModelGenerator targetPackage="com.test.model" targetProject="F:\source">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!-- 生成的映射文件包名和位置 -->
<sqlMapGenerator targetPackage="com.test.mapping" targetProject="F:\source">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!-- 生成DAO的包名和位置 -->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.test.dao" targetProject="F:\source">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!-- 要生成那些表(更改tableName和domainObjectName就可以) -->
<table tableName="t_test" domainObjectName="TTest" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false" />
</context>
</generatorConfiguration>
执行jar 文件
E:\data\Users\Administrator\Downloads\generator> java -jar mybatis-generator-cor e-1.3.2.jar -configfile generator.xml -overwrite MyBatis Generator finished successfully.
生成代码如下
package com.test.model;
public class TTest {
private Integer id;
private String username;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username == null ? null : username.trim();
}
}
package com.test.dao;
import com.test.model.TTest;
public interface TTestMapper {
int deleteByPrimaryKey(Integer id);
int insert(TTest record);
int insertSelective(TTest record);
TTest selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(TTest record);
int updateByPrimaryKey(TTest record);
}
XML 如下
<?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.test.dao.TTestMapper" >
<resultMap id="BaseResultMap" type="com.test.model.TTest" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="userName" property="username" jdbcType="VARCHAR" />
</resultMap>
<sql id="Base_Column_List" >
id, userName
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from t_test
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from t_test
where id = #{id,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.test.model.TTest" >
insert into t_test (id, userName)
values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR})
</insert>
<insert id="insertSelective" parameterType="com.test.model.TTest" >
insert into t_test
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="username != null" >
userName,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="username != null" >
#{username,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.test.model.TTest" >
update t_test
<set >
<if test="username != null" >
userName = #{username,jdbcType=VARCHAR},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.test.model.TTest" >
update t_test
set userName = #{username,jdbcType=VARCHAR}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>
编写mybatis 配置文件
mybatis-config.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>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC" />
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://127.0.0.1:3306/c_sai" />
<property name="username" value="root" />
<property name="password" value="" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="com\test\mapping\TTestMapper.xml" />
</mappers>
</configuration>
编写测试类
package com.jefry;
import java.io.IOException;
import java.io.InputStream;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.test.model.TTest;
public class Test {
static String resource = "mybatis-config.xml";
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder()
.build(inputStream);
SqlSession session = sqlSessionFactory.openSession();
try {
// User.selectUser中User对应UserMapper.xml文件中标签<mapper
// namespace="com.test.dao.TTestMapper"> namespace的值
// selectUser 对应UserMapper.xml文件中标签<select id="selectUser"
// parameterType="int" resultType="com.jefry.User">中id值
TTest tt = session.selectOne("com.test.dao.TTestMapper.selectByPrimaryKey", 1);
System.out.println("tt.getName()=" + tt.getUsername());
} finally {
session.close();
}
}
}
结果:
tt.getName()=2
到此为止mybatis 部署成功.
springMVC+MyBatis+Spring+maven 框架整合
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原文地址：http://www.cnblogs.com/zhenjava/p/4712366.html
