逆向工程的使用

1、配置generatorConfig.xml文件

<?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>
    <context id="MySQLTables" targetRuntime="MyBatis3">

        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>


        <!-- mvn mybatis-generator:generate 配置数据库位置 ，配置虚拟机上的mysql ip地址；不采用安全协议连接，否则无法逆向生成 -->
        <jdbcConnection
            driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/test?useSSL=false"
            userId="root" password="root">
        </jdbcConnection>
        
        
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>


        <!-- javaBean生成在哪里 -->
        <javaModelGenerator
                targetPackage="com.example.bean"
                targetProject="..\project-base\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>

        <!-- sqlMap sql映射文件（xml mapper文件） -->
        <sqlMapGenerator targetPackage="mybatis.mapper"
                         targetProject="..\project-mapper\src\main\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>

        <!-- javaClient：java接口生成的地方 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.example.mapper"
                             targetProject="..\project-interfaces\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>

        <!-- 根据表名逆向生成 -->
        <!-- <table schema="" tableName="%"></table> -->
        <table schema="TPermission" tableName="t_permission"></table>
    </context>
</generatorConfiguration> 

2、引入逆向工程的依赖

<!-- 逆向工程插件依赖 -->
<dependency>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-core</artifactId>
    <version>${mybatis-generator-core.version}</version>
</dependency>

3、配置逆向工程的插件

<!-- 逆向工程插件 -->
<build>
    <plugins>
        <plugin>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-maven-plugin</artifactId>
            <version>1.3.7</version>
            <dependencies>
                <dependency>
                    <groupId>mysql</groupId>
                    <artifactId>mysql-connector-java</artifactId>
                    <version>5.1.42</version>
                </dependency>
            </dependencies>
        </plugin>
    </plugins>
</build>

4、执行命令

mvn mybatis-generator:generate

5、代码示例

/*
	使用逆向工程生成bean、mapper、mapper.xml后，单表操作可直接如下操作，减少代码开发量
*/

// 模糊查询
example.createCriteria().andLoginacctLike("%" + condition + "%");

// 增加一个约束条件
Criteria criteria2 = example.createCriteria();
criteria2.andUsernameLike("%" + condition + "%");

Criteria criteria3 = example.createCriteria();
criteria3.andEmailLike("%" + condition + "%");

example.or(criteria2);
example.or(criteria3);