Mybatis的逆向工程

导入

	<dependencies>
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.6</version>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.47</version>
    </dependency>
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.7</version>
    </dependency>
</dependencies>

配置

放在resource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>
    <context id="testTables" targetRuntime="MyBatis3">
        <commentGenerator>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!--数据库连接的信息：驱动类、连接地址、用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://127.0.0.1:3306/vue-demo?useSSL=true" userId="root"
                        password="123456">
        </jdbcConnection>
        <!-- 默认false，把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer，为 true时把JDBC DECIMAL 和
            NUMERIC 类型解析为java.math.BigDecimal -->
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>

        <!-- targetProject:生成PO类的位置 -->
        <javaModelGenerator targetPackage="com.lt.pojo"
                            targetProject="./src/main/java">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
            <!-- 从数据库返回的值被清理前后的空格 -->
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- targetProject:mapper映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="mybatis.mappers"
                         targetProject="./src/main/resources">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </sqlMapGenerator>
        <!-- targetPackage：mapper接口生成的位置 -->
        <javaClientGenerator type="XMLMAPPER"
                             targetPackage="com.lt.dao"
                             targetProject="./src/main/java">
            <!-- enableSubPackages:是否让schema作为包的后缀 -->
            <property name="enableSubPackages" value="false" />
        </javaClientGenerator>
        <!-- 指定数据库表   tableName是表名   -->
         <table schema="" tableName="user"></table>

    </context>
</generatorConfiguration>

启动类

在main/java/com/lt/utils下创建一个工具类然后运行下面的方法，就会自动生成xml pojo

public static void main(String[] args) throws Exception {

package com.lt.util;

	import java.io.File;
	import java.util.ArrayList;
	import java.util.List;	
	import org.mybatis.generator.api.MyBatisGenerator;
	import org.mybatis.generator.config.Configuration;
	import org.mybatis.generator.config.xml.ConfigurationParser;
	import org.mybatis.generator.exception.XMLParserException;
	import org.mybatis.generator.internal.DefaultShellCallback;
	
	public class GeneratorSqlmap {
	
	    public void generator() throws Exception {
	
	        List<String> warnings = new ArrayList<String>();
	        boolean overwrite = true;
	        //指定 逆向工程配置文件
	        File configFile = new File("./src/main/resources/generatorConfig.xml");
	        ConfigurationParser cp = new ConfigurationParser(warnings);
	        Configuration config = cp.parseConfiguration(configFile);
	        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
	        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
	                callback, warnings);
	        myBatisGenerator.generate(null);
	
	    }
	
	    public static void main(String[] args) throws Exception {
	        try {
	            GeneratorSqlmap generatorSqlmap = new GeneratorSqlmap();
	            generatorSqlmap.generator();
	        } catch (Exception e) {
	            e.printStackTrace();
	        }
	
	    }
	}