maven插件mybatis-generator生成代碼配置


鳴謝:http://my.oschina.net/u/1763011/blog/324106?fromerr=nJakGh4P (也可參看此博客進行配置)

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

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

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

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

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

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

http://www.cnblogs.com/daxin/p/3545040.html (Mybatis MapperScannerConfigurer 自動掃描 將Mapper接口生成代理注入到Spring

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測試項目:Test

1.新建maven項目

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.在項目的/src/main/resources(默認目錄)的文件目錄下加入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> 
            <!-- 是否去除自動生成的注釋 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的包和此包在項目中的地址;

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

javaClientGenerator :指定生成訪問映射xml文件的接口所在包和此包在項目中的地址;

table屬性: 
enableCountByExample="false" 
enableUpdateByExample="false" 
enableDeleteByExample="false" 
enableSelectByExample="false" 
selectByExampleQueryId="false" 
schema為數據庫名, tableName為對應的數據庫表, domainObjectName是要生成的實體類, 
如果想要mapper配置文件加入sql的where條件查詢, 可以將enableCountByExample等設為true, 
這樣就會生成一個對應domainObjectName的Example類, enableCountByExample等設為false時, 
就不會生成對應的Example類了. 

如果table里邊不配置property,默認字段都生成為類屬性。 
<ignoreColumn column="FRED" />//忽略字段 
<columnOverride column="LONG_VARCHAR_FIELD" jdbcType="VARCHAR" />//無論字段是什么類型,生成的類屬性都是varchar。

 

4.項目 右鍵--》run as --》 maven bulid --》彈出對話框 --》在goals中輸入mybatis-generator:generate (或者 點擊select --》選擇你的mybatis插件 --》apply --》run)

 

5:選擇項目 按 F5 刷新項目 出現生成的代碼。

 

說明:上面示例的generateConfig.xml 可簡化成以下寫法:即把targetProject的決定路徑改為項目中的相對路徑。以后要用可直接復制下面的。

<?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> 
            <!-- 是否去除自動生成的注釋 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項目中要記得配對哦,如:

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

<!-- 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" />
        <!-- 自動掃描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:

 

實踐:

1.建表 t_student

2.項目 右鍵--》run as --》 maven bulid 生成代碼(按上面簡化的generateConfig.xml)

3.查看生成的代碼

a.Student.java  略

b.StudentMapper   注意:1.訪問pojo的映射文件可直接通過此接口訪問,不需要建立實現類。2.在spring-mybatis.xml中MapperScannerConfigurer會把sqlSessionFactory注入此類,所以也不需要注入sqlSessionFactory、SqlSessionTemplate 。具體參見: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.測試

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)        //表示繼承了SpringJUnit4ClassRunner類
@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("張三");
        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">
    <!-- 自動掃描 -->
    <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}" />
        <!-- 初始化連接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 連接池最大數量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 連接池最大空閑 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 連接池最小空閑 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 獲取連接最大等待時間 -->
        <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" />
        <!-- 自動掃描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會自動查找其下的類 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.cn.hnust.dao" />
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>

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

</beans>

項目結構:

 


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