众所周知,之前我们开发都是手动去创建框架,并且也都是一些很繁琐且枯燥的操作,之后便有了Mybatis Plus的代码生成器这个功能,简直好用到飞起(懒惰使科技进步是没错的),下面就为大家介绍一下最简单的用法
首先在pom中添加依赖
mysql mysql-connector-javaruntime 8.0.26 com.baomidou mybatis-plus-boot-starter3.0-RELEASE com.baomidou mybatis-plus-generator3.0-RELEASE org.mybatis.spring.boot mybatis-spring-boot-starter2.2.0 org.springframework.boot spring-boot-starter-freemarkerio.springfox springfox-swagger23.0.0 io.springfox springfox-swagger-ui2.9.2
然后去项目下新建一个util包,在里面创建一个CodeGenerator类来配置代码生成器
package com.study.util; import java.util.ArrayList; import java.util.List; import java.util.Scanner; import com.baomidou.mybatisplus.core.exceptions.MybatisPlusException; import com.baomidou.mybatisplus.core.toolkit.StringPool; import com.baomidou.mybatisplus.core.toolkit.StringUtils; import com.baomidou.mybatisplus.generator.AutoGenerator; import com.baomidou.mybatisplus.generator.InjectionConfig; import com.baomidou.mybatisplus.generator.config.DataSourceConfig; import com.baomidou.mybatisplus.generator.config.FileOutConfig; import com.baomidou.mybatisplus.generator.config.GlobalConfig; import com.baomidou.mybatisplus.generator.config.PackageConfig; import com.baomidou.mybatisplus.generator.config.StrategyConfig; import com.baomidou.mybatisplus.generator.config.TemplateConfig; import com.baomidou.mybatisplus.generator.config.po.TableInfo; import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy; import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine; import javax.swing.*; public class CodeGenerator { public static String scanner(String tip) { Scanner scanner = new Scanner(System.in); StringBuilder help = new StringBuilder(); help.append("请输入" + tip + ":"); System.out.println(help.toString()); if (scanner.hasNext()) { String ipt = scanner.next(); if (StringUtils.isNotEmpty(ipt)) { return ipt; } } throw new MybatisPlusException("请输入正确的" + tip + "!"); } public static void main(String[] args) { // 代码生成器 AutoGenerator mpg = new AutoGenerator(); // 全局配置 GlobalConfig gc = new GlobalConfig(); String projectPath = System.getProperty("user.dir"); gc.setOutputDir(projectPath + "/src/main/java"); gc.setAuthor("az"); gc.setOpen(false); gc.setServiceName("%sService"); gc.setXmlName("%sMapper"); gc.setServiceImplName("%sServiceImpl"); gc.setMapperName("%sMapper"); gc.setEntityName("%s"); gc.setControllerName("%sController"); gc.setSwagger2(true); gc.setbaseResultMap(true); mpg.setGlobalConfig(gc); // 数据源配置 DataSourceConfig dsc = new DataSourceConfig(); dsc.setUrl("jdbc:mysql://localhost:3306/fileupload?useUnicode=true&serverTimezone=GMT&useSSL=false&characterEncoding=utf8"); // dsc.setSchemaName("public"); dsc.setDriverName("com.mysql.cj.jdbc.Driver"); dsc.setUsername("root"); dsc.setPassword("root"); mpg.setDataSource(dsc); // 包配置 PackageConfig pc = new PackageConfig(); pc.setModuleName(null); pc.setParent("com.study"); mpg.setPackageInfo(pc); // 自定义配置 InjectionConfig cfg = new InjectionConfig() { @Override public void initMap() { // to do nothing } }; ListfocList = new ArrayList<>(); focList.add(new FileOutConfig("/templates/mapper.xml.ftl") { @Override public String outputFile(TableInfo tableInfo) { // 自定义输入文件名称 return projectPath + "/src/main/resources/mybatis/mapper/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML; } }); cfg.setFileOutConfigList(focList); mpg.setCfg(cfg); mpg.setTemplate(new TemplateConfig().setXml(null)); // 策略配置 StrategyConfig strategy = new StrategyConfig(); strategy.setNaming(NamingStrategy.underline_to_camel); strategy.setColumnNaming(NamingStrategy.underline_to_camel); strategy.setEntityLombokModel(true); strategy.setRestControllerStyle(true); strategy.setInclude(scanner("表名,多个英文逗号分割").split(",")); strategy.setControllerMappingHyphenStyle(true); strategy.setTablePrefix("m_"); mpg.setStrategy(strategy); // 选择 freemarker 引擎需要指定如下加,注意 pom 依赖必须有! mpg.setTemplateEngine(new FreemarkerTemplateEngine()); mpg.execute(); } }
然后我们直接运行main方法输入要生成的表
然后回车,我们就得到了一个完成的MVC框架!
Mybatis Plus中自身也携带了一些我们常用的CRUD方法,实习生狂喜(●'◡'●)
不过这里就不作演示了,大家如果有兴趣可以去了解一下