mybatis-generator

mybatis-generator

mybatis-generator可以用来自动生成实体类、mapper接口、mapper的xml文件。

前提准备

在数据库表建立完整的前提下
pom.xml中：

       <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.5</version>
        </dependency>
            <!-- mybatis-generator自动生成代码插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>src/main/resources/mybatis-generator/generatorConfig.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>

配置配置文件

mybatis:
  config-location: classpath:mybatis-generator/mybatis-config.xml
  mapper-locations: classpath:mapper/*.xml##

编写generatorConfig.xml

在resource下的mybatis-config.xml目录下：

<?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>
    <!--自己的地址-->
    <classPathEntry location="E:\mysql-connector-java-5.1.8\mysql-connector-java-5.1.8-bin.jar"/>
    <context id="my" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="false"/>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--数据库相关的配置-->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/数据库?characterEncoding=utf-8" userId="root"
                        password="xxxx"/>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!--实体类需要放置的位置-->
        <javaModelGenerator targetPackage="com.jiajiawen.jjw.entity"
                            targetProject="D:\projects\management\jjw\src\main\java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!--mapper.xml需要放置的位置-->
        <sqlMapGenerator targetPackage="mapper"
                         targetProject="D:\projects\management\jjw\src\main\resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!--mapper接口放置的位置-->
        <javaClientGenerator targetPackage="com.jiajiawen.jjw.mapper"
                             targetProject="D:\projects\management\jjw\src\main\java" type="XMLMAPPER">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <!--各个表-->
        <table tableName="user" domainObjectName="user"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
        <table tableName="role" domainObjectName="role"
               enableCountByExample="false" enableUpdateByExample="false"
               enableDeleteByExample="false" enableSelectByExample="false"
               selectByExampleQueryId="false">
        </table>
    </context>
</generatorConfiguration>

编写mybatis-config文件

<?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>
</configuration>