Mybatis之逆向工程

新建一个maven工程 pom.xml内容以下：

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.zns</groupId>
    <artifactId>project1</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <!-- 引入sqlserver数据库链接包 -->
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>sqljdbc4</artifactId>
            <version>4.0</version>
        </dependency>
        <!-- 引入mysql数据库链接包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.35</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis.generator</groupId>
            <artifactId>mybatis-generator-core</artifactId>
            <version>1.3.2</version>
        </dependency>
    </dependencies>
</project>

 

 

在src/main/resources下增长一个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="context1" targetRuntime="MyBatis3">
        <!--<plugin type="org.mybatis.generator.plugins.EqualsHashCodePlugin"></plugin>
        <plugin type="org.mybatis.generator.plugins.ToStringPlugin"></plugin>
        <plugin type="org.mybatis.generator.plugins.SerializablePlugin"></plugin>-->

        <commentGenerator>
            <!-- 这个元素用来去除指定生成的注释中是否包含生成的日期 false:表示保护 -->
            <!-- 若是生成日期，会形成即便修改一个字段，整个实体类全部属性都会发生变化，不利于版本控制，因此设置为true -->
            <property name="suppressDate" value="true"/>
            <!-- 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URL，用户名、密码 -->
        <!--<jdbcConnection driverClass="com.mysql.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/testdb?characterEncoding=utf8"
                        userId="root" password="123456">
        </jdbcConnection>-->
        <jdbcConnection driverClass="com.microsoft.sqlserver.jdbc.SQLServerDriver"
                        connectionURL="jdbc:sqlserver://192.168.1.100:1433;DatabaseName=testdb"
                        userId="sa" password="123456">
        </jdbcConnection>
        <javaTypeResolver>
            <!-- This property is used to specify whether MyBatis Generator should
                force the use of java.math.BigDecimal for DECIMAL and NUMERIC fields, -->
            <property name="forceBigDecimals" value="true"/>
        </javaTypeResolver>
        <!-- 生成模型类的包名和位置 -->
        <javaModelGenerator targetPackage="com.zns.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- 生成mapper映射文件的包名和位置 -->
        <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!-- 生成mapper类的包名和位置 -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.zns.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>


        <!-- 要生成哪些表(指定tableName和domainObjectName就能够) -->
        <table tableName="tb_user" domainObjectName="User"
                       enableCountByExample="false" enableUpdateByExample="false"
                       enableDeleteByExample="false" enableSelectByExample="false"
                       selectByExampleQueryId="false">
        <generatedKey column="id" sqlStatement="Mysql" identity="true"/>
        </table>

    </context>
</generatorConfiguration>

 

 

新建一个生成代码类

package com.zns;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class MyGenerate {
    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        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);
        System.out.println("生成成功...");
    }
}

 

 

右键执行MyGenerate main方法便可!