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maven插件mybatis-generator生成代码配置

2017-01-09 15:31 537 查看
http://www.cnblogs.com/wql025/p/5037860.html


maven插件mybatis-generator生成代码配置

鸣谢:http://my.oschina.net/u/1763011/blog/324106?fromerr=nJakGh4P (也可参看此博客进行配置)

http://www.cnblogs.com/zcy_soft/p/3358132.html(补充1)

http://blog.csdn.net/sunny243788557/article/details/45166397 (补充2)

http://www.cnblogs.com/yjmyzz/p/4210554.html (补充3)

http://www.myexception.cn/software-architecture-design/621662.html (补充4)

http://mbg.cndocs.tk (MyBatis Generator介绍)

http://blog.csdn.net/isea533/article/details/42102297 (MyBatis Generator详解)

http://www.cnblogs.com/daxin/p/3545040.html (Mybatis MapperScannerConfigurer 自动扫描 将Mapper接口生成代理注入到Spring

---------------------------------------------------------------------------------------------------------------------------

测试项目:Test

1.新建maven项目

2.pom.xml文件中添加插件,如:

<build>
<finalName>org.zsl.hnust</finalName>
<plugins>
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.2</version>
<configuration>
<verbose>true</verbose>
<overwrite>true</overwrite>
</configuration>
</plugin>
</plugins>
</build>


3.在项目的/src/main/resources(默认目录)的文件目录下加入generateConfig.xml 

如:

<?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>
<classPathEntry
location="D:\repo\mysql-connector-java-5.1.26.jar" />
<context id="context1" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>

<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/test"
userId="root" password="" />
<javaModelGenerator targetPackage="com.cn.hnust.pojo"
targetProject="D:\Eclipse_Workspace\HNUST\org.zsl.hnust Maven Webapp\src\main\java" />

<sqlMapGenerator targetPackage="com.cn.hnust.mapping"
targetProject="D:\Eclipse_Workspace\HNUST\org.zsl.hnust Maven Webapp\src\main\java" />

<javaClientGenerator type="XMLMAPPER" targetPackage="com.cn.hnust.dao"
targetProject="D:\Eclipse_Workspace\HNUST\org.zsl.hnust Maven Webapp\src\main\java">
</javaClientGenerator>

<table tableName="t_student" domainObjectName="Address"
enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false" >
<property name="useActualColumnNames" value="true"/>
</table>
</context>
</generatorConfiguration>


注:

javaModelGenerator :指定生成pojo的包和此包在项目中的地址;

sqlMapGenerator :指定生成pojo的映射xml文件的所在包和此包在项目中的地址;

javaClientGenerator :指定生成访问映射xml文件的接口所在包和此包在项目中的地址;

table属性: 

enableCountByExample="false" 

enableUpdateByExample="false" 

enableDeleteByExample="false" 

enableSelectByExample="false" 

selectByExampleQueryId="false" 

schema为数据库名, tableName为对应的数据库表, domainObjectName是要生成的实体类, 
如果想要mapper配置文件加入sql的where条件查询, 可以将enableCountByExample等设为true, 

这样就会生成一个对应domainObjectName的Example类, enableCountByExample等设为false时, 

就不会生成对应的Example类了. 


如果table里边不配置property,默认字段都生成为类属性。 

<ignoreColumn column="FRED" />//忽略字段 

<columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />//无论字段是什么类型,生成的类属性都是varchar。

 

4.项目 右键--》run as --》 maven bulid --》弹出对话框 --》在goals中输入mybatis-generator:generate (或者 点击select --》选择你的mybatis插件 --》apply --》run)

 

5:选择项目 按 F5 刷新项目 出现生成的代码。

 

说明:上面示例的generateConfig.xml 可简化成以下写法:即把targetProject的决定路径改为项目中的相对路径。以后要用可直接复制下面的。

<?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>
<classPathEntry
location="D:\repo\mysql-connector-java-5.1.26.jar" />
<context id="context1" targetRuntime="MyBatis3">
<commentGenerator>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<property name="suppressAllComments" value="true" />
</commentGenerator>

<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/test"
userId="root" password="" />
<javaModelGenerator targetPackage="com.cn.hnust.pojo"
targetProject="src/main/java" />

<sqlMapGenerator targetPackage="sqlMap"
targetProject="src/main/resources" />

<javaClientGenerator type="XMLMAPPER" targetPackage="com.cn.hnust.dao"
targetProject="src/main/java">
</javaClientGenerator>

<table tableName="t_student" domainObjectName="Student"
enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false" >
<property name="useActualColumnNames" value="true"/>
</table>
</context>
</generatorConfiguration>


值得注意的是pojo映射文件的存放地址在项目中要记得配对哦,如:

spring-mybatis.xml中下面的配置:这里sql映射文件存放在src/main/resources目录

<!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 原:value="classpath:com/cn/hnust/mapping/*.xml"-->
<property name="mapperLocations" value="classpath:sqlMap/*.xml"/>
</bean>


sql映射文件存放地址:



 

实践:

1.建表 t_student



2.项目 右键--》run as --》 maven bulid 生成代码(按上面简化的generateConfig.xml)

3.查看生成的代码

a.Student.java  略

b.StudentMapper   注意:1.访问pojo的映射文件可直接通过此接口访问,不需要建立实现类。2.在spring-mybatis.xml中MapperScannerConfigurer会把sqlSessionFactory注入此类,所以也不需要注入sqlSessionFactory、SqlSessionTemplate 。具体参见:http://www.cnblogs.com/daxin/p/3545040.html

package com.cn.hnust.dao;

import com.cn.hnust.pojo.Student;

public interface StudentMapper {
int deleteByPrimaryKey(Integer sid);

int insert(Student record);

int insertSelective(Student record);

Student selectByPrimaryKey(Integer sid);

int updateByPrimaryKeySelective(Student record);

int updateByPrimaryKey(Student record);
}


c.StudentMapper.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.cn.hnust.dao.StudentMapper" >
<resultMap id="BaseResultMap" type="com.cn.hnust.pojo.Student" >
<id column="sid" property="sid" jdbcType="INTEGER" />
<result column="sname" property="sname" jdbcType="VARCHAR" />
<result column="sex" property="sex" jdbcType="CHAR" />
</resultMap>
<sql id="Base_Column_List" >
sid, sname, sex
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from t_student
where sid = #{sid,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from t_student
where sid = #{sid,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.cn.hnust.pojo.Student" >
insert into t_student (sid, sname, sex)
values (#{sid,jdbcType=INTEGER}, #{sname,jdbcType=VARCHAR}, #{sex,jdbcType=CHAR})
</insert>
<insert id="insertSelective" parameterType="com.cn.hnust.pojo.Student" >
insert into t_student
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="sid != null" >
sid,
</if>
<if test="sname != null" >
sname,
</if>
<if test="sex != null" >
sex,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="sid != null" >
#{sid,jdbcType=INTEGER},
</if>
<if test="sname != null" >
#{sname,jdbcType=VARCHAR},
</if>
<if test="sex != null" >
#{sex,jdbcType=CHAR},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.cn.hnust.pojo.Student" >
update t_student
<set >
<if test="sname != null" >
sname = #{sname,jdbcType=VARCHAR},
</if>
<if test="sex != null" >
sex = #{sex,jdbcType=CHAR},
</if>
</set>
where sid = #{sid,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.cn.hnust.pojo.Student" >
update t_student
set sname = #{sname,jdbcType=VARCHAR},
sex = #{sex,jdbcType=CHAR}
where sid = #{sid,jdbcType=INTEGER}
</update>
</mapper>


4.测试

package org.zsl.testmybatis;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.cn.hnust.dao.StudentMapper;
import com.cn.hnust.pojo.Address;
import com.cn.hnust.pojo.Student;

@RunWith(SpringJUnit4ClassRunner.class)        //表示继承了SpringJUnit4ClassRunner类
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})
public class StudentTest {
@Resource
private StudentMapper studentMapper;

@Test
public void insert(){
Student s = new Student();
s.setSex("女");
s.setSname("李浩");
studentMapper.insert(s);
}

@Test
public void deleteByPrimaryKey(){
studentMapper.deleteByPrimaryKey(1);
}

@Test
public void insertSelective(){
Student s = new Student();
s.setSname("李浩");
studentMapper.insertSelective(s);
}

@Test
public void selectByPrimaryKey(){
Student s = studentMapper.selectByPrimaryKey(2);
System.out.println(s);
}

@Test
public void updateByPrimaryKeySelective(){
Student s = studentMapper.selectByPrimaryKey(2);
s.setSname("张三");
studentMapper.updateByPrimaryKeySelective(s);
}

@Test
public void updateByPrimaryKey(){
Student s = studentMapper.selectByPrimaryKey(2);
s.setSname("王五");
s.setSex("男");
studentMapper.updateByPrimaryKeySelective(s);
}

}


 

附:

spring-mybatis.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd"> <!-- 自动扫描 -->
<context:component-scan base-package="com.cn.hnust" />
<!-- 引入配置文件 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
</bean>

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>

<!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描mapping.xml文件 原:value="classpath:com/cn/hnust/mapping/*.xml"--> <property name="mapperLocations" value="classpath:sqlMap/*.xml"/> </bean>

<!-- DAO接口所在包名,Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.cn.hnust.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

<!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>

</beans>


项目结构:



 
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