SpringBoot整合MybatisPlus 自动生成controller、mapper、entity、service-编程知识

首先创建SpringBoot项目

选择依赖

把application的后缀改为.yml，方便些。

pom.xml：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.7.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.xgsm</groupId><artifactId>mybatisplus</artifactId><version>0.0.1-SNAPSHOT</version><name>mybatisplus</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.2.2</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><!-- https://mvnrepository.com/artifact/com.baomidou/mybatis-plus-boot-starter --><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.4.2</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.2.8</version></dependency><dependency><groupId>com.baomidou</groupId><artifactId>dynamic-datasource-spring-boot-starter</artifactId><version>3.4.1</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><exclusions><exclusion><groupId>org.junit.jupiter</groupId><artifactId>junit-jupiter-api</artifactId></exclusion></exclusions><scope>test</scope></dependency><!-- https://mvnrepository.com/artifact/junit/junit --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.13.1</version><scope>test</scope></dependency><dependency><groupId>com.spring4all</groupId><artifactId>swagger-spring-boot-starter</artifactId><version>1.7.1.RELEASE</version></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId></dependency><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-generator</artifactId><scope>test</scope><version>3.4.0</version></dependency><dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><scope>test</scope><version>2.3.31</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><version>2.7.0</version><configuration><fork>true</fork><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build></project>

需要在application.yml中配置下数据源，并修改端口。

application.yml：

server:port: 8080
spring:datasource:url: jdbc:mysql://127.0.0.1:3306/ssm-java1?useSSL=false&&characterEncoding=UTF-8driver-class-name: com.mysql.cj.jdbc.Driverusername: rootpassword: 123456

写个HelloController测试下

HelloController：

package com.example.laozhang.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RestController;/*** <p>*  前端控制器* </p>** @author java爱好者* @since 2023-06-26*/
@RestController
@RequestMapping("/test-user")
public class TestUserController {@RequestMapping("/hello")public String hello(){return "keafmd";}
}

到此证明SpringBoot没有问题。

使用代码生成器生成代码

添加所需的依赖

pom.xml中添加以下依赖：

<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-generator</artifactId><scope>test</scope><version>3.4.0</version>
</dependency>
<dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId><scope>test</scope><version>2.3.31</version>
</dependency>

由于代码生成器并不会在生产环境使用，只是在开发环境中使用了下。所以我们把代码生成器写在test包中即可，依赖的使用场景也定义成test即可。

CodeGenerator

package com.example.mp;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.*;
import com.baomidou.mybatisplus.generator.config.po.TableInfo;
import com.baomidou.mybatisplus.generator.config.rules.NamingStrategy;
import com.baomidou.mybatisplus.generator.engine.FreemarkerTemplateEngine;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
/*** Keafmd** @ClassName: CodeGenerator* @Description:* @author:* @date:*/
// 演示例子，执行 main 方法控制台输入模块表名回车自动生成对应项目目录中
public class CodeGenerator {/*** <p>* 读取控制台内容* </p>*/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.isNotBlank(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");
//        System.out.println("projectPath = " + projectPath);gc.setOutputDir(projectPath + "/src/main/java");
//        gc.setOutputDir("D:\\test");gc.setAuthor("java爱好者");gc.setOpen(false);// gc.setSwagger2(true); 实体属性 Swagger2 注解gc.setServiceName("%sService");mpg.setGlobalConfig(gc);// 数据源配置DataSourceConfig dsc = new DataSourceConfig();dsc.setUrl("jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&useSSL=false&characterEncoding=utf8&serverTimezone=UTC");// dsc.setSchemaName("public");dsc.setDriverName("com.mysql.cj.jdbc.Driver");dsc.setUsername("root");dsc.setPassword("123456");mpg.setDataSource(dsc);// 包配置PackageConfig pc = new PackageConfig();pc.setModuleName(null);pc.setParent("com.example.laozhang");mpg.setPackageInfo(pc);// 自定义配置InjectionConfig cfg = new InjectionConfig() {@Overridepublic void initMap() {// to do nothing}};// 如果模板引擎是 freemarkerString templatePath = "/templates/mapper.xml.ftl";// 如果模板引擎是 velocity// String templatePath = "/templates/mapper.xml.vm";// 自定义输出配置List<FileOutConfig> focList = new ArrayList<>();// 自定义配置会被优先输出focList.add(new FileOutConfig(templatePath) {@Overridepublic String outputFile(TableInfo tableInfo) {// 自定义输出文件名 ， 如果你 Entity 设置了前后缀、此处注意 xml 的名称会跟着发生变化！！return projectPath + "/src/main/resources/mapper/"+ "/" + tableInfo.getEntityName() + "Mapper" + StringPool.DOT_XML;}});cfg.setFileOutConfigList(focList);mpg.setCfg(cfg);// 配置模板TemplateConfig templateConfig = new TemplateConfig();templateConfig.setXml(null);mpg.setTemplate(templateConfig);// 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);mpg.setTemplateEngine(new FreemarkerTemplateEngine());mpg.execute();}
}