MyBatis Generator 逆向工程使用

• 創建resources文件及對應生成的包

• pom.xml中引入必要的包：

<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.lwy</groupId>
	<artifactId>MyBatisGenerator</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>MyBatisGenerator</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<!-- https://mvnrepository.com/artifact/org.postgresql/postgresql -->
		<dependency>
			<groupId>org.postgresql</groupId>
			<artifactId>postgresql</artifactId>
			<version>42.2.5</version>
		</dependency>

		<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
		<dependency>
			<groupId>org.mybatis.generator</groupId>
			<artifactId>mybatis-generator-core</artifactId>
			<version>1.3.7</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.5.0</version>
		</dependency>

	</dependencies>
</project>

• 在項目下創建generatorConfig.xml文件，並配置：

<?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>

	<!-- 注意逆向工程中的路徑問題，windows和mac等的文件系統路徑不同，mac和Linux下應該使用./，windows下應該使用.\​ -->
	<!-- 導入的類 <classPathEntry location="/Program Files/IBM/SQLLIB/java/db2java.zip"/> -->
	<context id="tables" targetRuntime="MyBatis3">

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

		<!-- 配置數據庫連接信息 -->
		<jdbcConnection driverClass="驅動：org.postgresql.Driver"
			connectionURL="jdbc連接串：jdbc:postgresql://127.0.0.1:5432/test"
			userId="用戶名" password="密碼">
		</jdbcConnection>

		<!-- Java類型解析 -->
		<javaTypeResolver>
			<property name="forceBigDecimals" value="false" />
		</javaTypeResolver>

		<!-- 指定JavaBen生成的位置 -->
		<javaModelGenerator targetPackage="com.lwy.bean"
			targetProject="./src/main/java">
			<property name="enableSubPackages" value="true" />
			<property name="trimStrings" value="true" />
		</javaModelGenerator>

		<!-- 指定SQL 映射文件生成的位置 -->
		<sqlMapGenerator targetPackage="mapper"
			targetProject="./src/main/resources">
			<property name="enableSubPackages" value="true" />
		</sqlMapGenerator>

		<!-- 指定dao接口生成的位置 -->
		<javaClientGenerator type="XMLMAPPER"
			targetPackage="com.lwy.dao" targetProject="./src/main/java">
			<property name="enableSubPackages" value="true" />
		</javaClientGenerator>

		<!-- 指定每個表的生成策略 設置以下Example爲false，不生成Example -->
		<table tableName="student" domainObjectName="Student"
			enableCountByExample="false" enableUpdateByExample="false"
			enableDeleteByExample="false" enableSelectByExample="false"
			selectByExampleQueryId="false">
		</table>

	</context>
</generatorConfiguration>

• 創建主函數，運行生成相應文件文件。

package com.lwy.main;

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.internal.DefaultShellCallback;

public class Main {

	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		List<String> warnings = new ArrayList<String>();
		boolean overwrite = true;
		File configFile = new File("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);
	}

}