1.添加pom.xml文件,配置文件如下:
<?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.ping</groupId>
<artifactId>mybatisnixiangproject</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.1</version>
</dependency>
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.5</version>
<scope>compile</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!-- https://mvnrepository.com/artifact/log4j/log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.xml</include>
<include>**/*.properties</include>
</includes>
</resource>
</resources>
<plugins>
<!-- mybatis-generator自动生成代码插件 -->
<plugin>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-maven-plugin</artifactId>
<version>1.3.5</version>
</plugin>
</plugins>
</build>
</project>
2.在 resources文件下添加(db.properties,log4j.properties,generatorConfig.xml)三个文件,具体如下:
db.properties:
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis
jdbc.username=root
jdbc.password=root
log4j.properties:
log4j.rootLogger=DEBUG, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c{1}:%L - %m%n
generatorConfig.xm:
<?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:\mvn_local_repository\mysql\mysql-connector-java\5.1.38\mysql-connector-java-5.1.38.jar" />
-->
<!--【*****】-->
<properties resource="db.properties"/>
<context id="mysql" targetRuntime="MyBatis3">
<!-- 生成的pojo,将implements Serializable-->
<plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
<!-- 是否去除自动生成的注释 true:是 : false:否 -->
<commentGenerator>
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!-- 数据库链接URL、用户名、密码 -->
<!-- <jdbcConnection
driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://127.0.0.1:3306/webtestdb"
userId="root"
password="root">
</jdbcConnection>-->
<!--【*****】-->
<jdbcConnection
driverClass="${jdbc.driver}"
connectionURL="${jdbc.url}"
userId="${jdbc.username}"
password="${jdbc.password}">
</jdbcConnection>
<!--
默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer
true,把JDBC DECIMAL 和 NUMERIC 类型解析为java.math.BigDecimal
-->
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!--【***** PO】
生成model模型,对应的包路径,以及文件存放路径(targetProject),targetProject可以指定具体的路径,如./src/main/java,
也可以使用“MAVEN”来自动生成,这样生成的代码会在target/generatord-source目录下
-->
<!--<javaModelGenerator targetPackage="com.joey.mybaties.test.pojo" targetProject="MAVEN">-->
<javaModelGenerator targetPackage="com.arvin.po" targetProject="./src/main/java">
<!-- 在targetPackage的基础上,根据数据库的schema再生成一层package,最终生成的类放在这个package下,默认为false -->
<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>
<!--【*****】-->
<!--对应的XXXMapper接口类 -->
<sqlMapGenerator targetPackage="com.arvin.mapper" targetProject="./src/main/java">
<!-- 在targetPackage的基础上,根据数据库的schema再生成一层package,最终生成的类放在这个package下,默认为false -->
<property name="enableSubPackages" value="false"/>
</sqlMapGenerator>
<!--【*****】-->
<!-- 对应的Mapper接口类文件xxxMapper.xml -->
<javaClientGenerator targetPackage="com.arvin.mapper" type="XMLMAPPER" targetProject="./src/main/java">
<!-- 在targetPackage的基础上,根据数据库的schema再生成一层package,最终生成的类放在这个package下,默认为false -->
<property name="enableSubPackages" value="false"/>
</javaClientGenerator>
<!--【*****】-->
<!-- 列出要生成代码的所有表,这里配置的是不生成Example文件 -->
<!--指定数据库表-->
<table tableName="items" domainObjectName="Items"/>
<table tableName="orders" domainObjectName="Orders"/>
<table tableName="orderdetail" domainObjectName="Orderdetail"/>
<table tableName="user" domainObjectName="User"/>
</context>
</generatorConfiguration>
3.分别创建(client、mapper、po)三个包,在client包下创建实现类,具体如下:
package com.arvin.client;
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 GeneratorSqlMap
{
public void generatorMethod() throws Exception{
List<String> warnings = new ArrayList<String>();
boolean overwirte = true;
//指定逆向工程配置文件
String genCfg = "/generatorConfig.xml";
File configFile = new File(GeneratorSqlMap.class.getResource(genCfg).getFile());
ConfigurationParser configurationParser = new ConfigurationParser(warnings);
Configuration configuration = configurationParser.parseConfiguration(configFile);
DefaultShellCallback defaultShellCallback = new DefaultShellCallback(overwirte);
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(configuration,defaultShellCallback,warnings);
myBatisGenerator.generate(null);
}
public static void main(String[] args) throws Exception
{
try{
GeneratorSqlMap generatorSqlMap = new GeneratorSqlMap();
generatorSqlMap.generatorMethod();
}catch(Exception ex){
ex.printStackTrace();
}
}
}