【MyBatis-Plus】MyBaits-Plus 代码生成器快速构建 Spring Boot 项目

旧城等待， 2022-12-04 09:27 128阅读 0赞

## 数据库脚本 ##

CREATE DATABASE /*!32312 IF NOT EXISTS*/`mp_generator` /*!40100 DEFAULT CHARACTER SET utf8 */;
    USE `mp_generator`;
    CREATE TABLE `mp_user` (
      `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID',
      `username` varchar(50) DEFAULT NULL COMMENT '用户名',
      `age` tinyint(10) DEFAULT NULL COMMENT '年龄',
      `sex` tinyint(1) DEFAULT NULL COMMENT '性别 0 男 1 女',
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (1, '张三', 14, 0);
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (2, '李四', 15, 1);
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (3, '张美美', 13, 1);
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (4, '鲁班七号', 16, 0);
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (5, '上官婉儿', 17, 1);
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (6, '甄姬', 18, 1);
    INSERT INTO `mp_user`(`id`, `username`, `age`, `sex`) VALUES (7, NULL, NULL, NULL);

## 添加依赖 ##

* 添加 `Spring Boot Web` 依赖
 
 <dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
 </dependency>
 * 添加 `Lombok` 依赖
 
 <dependency>
 <groupId>org.projectlombok</groupId>
 <artifactId>lombok</artifactId>
 <version>1.18.12</version>
 <scope>provided</scope>
 </dependency>
 * 添加 `MyBatis-Plus` 依赖
 
 <dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatis-plus-boot-starter</artifactId>
 <version>3.4.0</version>
 </dependency>
 <dependency>
 <groupId>com.baomidou</groupId>
 <artifactId>mybatis-plus-generator</artifactId>
 <version>3.4.0</version>
 </dependency>
 	<dependency>
 <groupId>org.freemarker</groupId>
 <artifactId>freemarker</artifactId>
 </dependency>
 * 添加 `数据库` 依赖
 
 <dependency>
 <groupId>mysql</groupId>
 <artifactId>mysql-connector-java</artifactId>
 <version>5.1.49</version>
 </dependency>
 * 添加 `javaformat代码美化` 插件
 
 <plugin>
 <groupId>io.spring.javaformat</groupId>
 <artifactId>spring-javaformat-maven-plugin</artifactId>
 <version>0.0.25</version>
 </plugin>

## Spring Boot 配置 ##

在 `src/main/resources` 目录下创建名为 `application.yml`文件

spring:
      application:
        name: mybatis-plus-generator
      main:
        allow-bean-definition-overriding: true
      datasource:
        type: com.zaxxer.hikari.HikariDataSource
        driver-class-name: com.mysql.jdbc.Driver
        url: jdbc:mysql://localhost:3306/mp_generator?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false
        username: root
        password: 123456
        hikari:
          minimum-idle: 5
          idle-timeout: 600000
          maximum-pool-size: 10
          auto-commit: true
          pool-name: MyHikariCP
          max-lifetime: 1800000
          connection-timeout: 30000
          connection-test-query: SELECT 1

## 代码模版 ##

### ORM 映射文件 ###

在 `src/main/resources/templates` 目录下创建名为 `mapper.xml.ftl` 文件

<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
 <mapper namespace="${package.Mapper}.${table.mapperName}">
 <#if enableCache>
 <cache type="org.mybatis.caches.ehcache.LoggingEhcache"/>
 </#if>
 
 <#if baseResultMap>
 <resultMap id="BaseResultMap" type="${package.Entity}.${entity}">
 <#list table.fields as field>
 <#if field.keyFlag>
 <#--生成主键排在第一位-->
 <id column="${field.name}" property="${field.propertyName}" />
 </#if>
 </#list>
 <#list table.commonFields as field>
 <#--生成公共字段 -->
 <result column="${field.name}" property="${field.propertyName}" />
 </#list>
 <#list table.fields as field>
 <#if !field.keyFlag>
 <#--生成普通字段 -->
 <result column="${field.name}" property="${field.propertyName}" />
 </#if>
 </#list>
 </resultMap>
 </#if>
 
 <#if baseColumnList>
 <sql id="Base_Column_List">
 <#list table.commonFields as field>
 ${field.name},
 </#list>
 ${table.fieldNames}
 </sql>
 </#if>
 </mapper>

### 数据访问接口 ###

在 `src/main/resources/templates` 目录下创建名为 `mapper.java.ftl` 文件

package ${ package.Mapper};
 
 import ${ package.Entity}.${ entity};
 import ${ superMapperClassPackage};
 
 /** * * ${table.comment!} Mapper 接口 * * * @author ${author} * @since ${date} */
 <#if kotlin>
 interface ${ table.mapperName} : ${ superMapperClass}<${ entity}>
 <#else>
 public interface ${ table.mapperName} extends ${ superMapperClass}<${ entity}> { 
 
 }
 </#if>

### 领域模型 ###

在 `src/main/resources/templates` 目录下创建名为 `entity.java.ftl` 文件

package ${ package.Entity};
 
 <#list table.importPackages as pkg>
 import ${ pkg};
 </#list>
 <#if swagger2>
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 </#if>
 <#if entityLombokModel>
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.experimental.Accessors;
 </#if>
 
 /** * * ${table.comment!} * * * @author ${author} * @since ${date} */
 <#if entityLombokModel>
 @Data
 <#if superEntityClass??>
 @EqualsAndHashCode(callSuper = true)
 <#else>
 @EqualsAndHashCode(callSuper = false)
 </#if>
 @Accessors(chain = true)
 </#if>
 <#if table.convert>
 @TableName("${table.name}")
 </#if>
 <#if swagger2>
 @ApiModel(value="${entity}对象", description="${table.comment!}")
 </#if>
 <#if superEntityClass??>
 public class ${ entity} extends ${ superEntityClass}<#if activeRecord><${ entity}></#if> { 
 <#elseif activeRecord>
 public class ${ entity} extends Model<${ entity}> { 
 <#else>
 public class ${ entity} implements Serializable { 
 </#if>
 
 <#if entitySerialVersionUID>
 private static final long serialVersionUID = 1L;
 </#if>
 <#-- ---------- BEGIN 字段循环遍历 ---------->
 <#list table.fields as field>
 <#if field.keyFlag>
 <#assign keyPropertyName="${field.propertyName}"/>
 </#if>
 
 <#if field.comment!?length gt 0>
 <#if swagger2>
 @ApiModelProperty(value = "${field.comment}")
 <#else>
 /** * ${field.comment} */
 </#if>
 </#if>
 <#if field.keyFlag>
 <#-- 主键 -->
 <#if field.keyIdentityFlag>
 @TableId(value = "${field.name}", type = IdType.ASSIGN_ID)
 <#elseif idType??>
 @TableId(value = "${field.name}", type = IdType.${ idType})
 <#elseif field.convert>
 @TableId("${field.name}")
 </#if>
 <#-- 普通字段 -->
 <#elseif field.fill??>
 <#-- ----- 存在字段填充设置 ----->
 <#if field.convert>
 @TableField(value = "${field.name}", fill = FieldFill.${ field.fill})
 <#else>
 @TableField(fill = FieldFill.${ field.fill})
 </#if>
 <#elseif field.convert>
 @TableField("${field.name}")
 </#if>
 <#-- 乐观锁注解 -->
 <#if (versionFieldName!"") == field.name>
 @Version
 </#if>
 <#-- 逻辑删除注解 -->
 <#if (logicDeleteFieldName!"") == field.name>
 @TableLogic
 </#if>
 private ${ field.propertyType} ${ field.propertyName};
 </#list>
 <#------------ END 字段循环遍历 ---------->
 
 <#if !entityLombokModel>
 <#list table.fields as field>
 <#if field.propertyType == "boolean">
 <#assign getprefix="is"/>
 <#else>
 <#assign getprefix="get"/>
 </#if>
 public ${ field.propertyType} ${ getprefix}${ field.capitalName}() { 
 return ${ field.propertyName};
 }
 
 <#if entityBuilderModel>
 public ${ entity} set${ field.capitalName}(${ field.propertyType} ${ field.propertyName}) { 
 <#else>
 public void set${ field.capitalName}(${ field.propertyType} ${ field.propertyName}) { 
 </#if>
 this.${ field.propertyName} = ${ field.propertyName};
 <#if entityBuilderModel>
 return this;
 </#if>
 }
 </#list>
 </#if>
 
 <#if entityColumnConstant>
 <#list table.fields as field>
 public static final String ${ field.name?upper_case} = "${field.name}";
 
 </#list>
 </#if>
 <#if activeRecord>
 @Override
 protected Serializable pkVal() { 
 <#if keyPropertyName??>
 return this.${ keyPropertyName};
 <#else>
 return null;
 </#if>
 }
 
 </#if>
 <#if !entityLombokModel>
 @Override
 public String toString() { 
 return "${entity}{" +
 <#list table.fields as field>
 <#if field_index==0>
 "${field.propertyName}=" + ${ field.propertyName} +
 <#else>
 ", ${field.propertyName}=" + ${ field.propertyName} +
 </#if>
 </#list>
 "}";
 }
 </#if>
 }

### 业务逻辑接口 ###

在 `src/main/resources/templates` 目录下创建名为 `service.java.ftl` 文件

package ${ package.Service};
 
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import ${ package.Entity}.${ entity};
 import ${ superServiceClassPackage};
 
 /** * * ${table.comment!} 服务类 * * * @author ${author} * @since ${date} */
 <#if kotlin>
 interface ${ table.serviceName} : ${ superServiceClass}<${ entity}>
 <#else>
 public interface ${ table.serviceName} extends ${ superServiceClass}<${ entity}> { 
 /** * 新增 * @param ${entity?uncap_first} {@link ${entity}} * @return {@code boolean} */
 boolean create(${ entity} ${ entity?uncap_first});
 
 /** * 删除 * @param id {@code Long} * @return {@code boolean} */
 boolean remove(Long id);
 
 /** * 编辑 * @param ${entity?uncap_first} {@link ${entity}} * @return {@code boolean} */
 boolean update(${ entity} ${ entity?uncap_first});
 
 /** * 获取 * @param id {@code Long} * @return {@link ${entity}} */
 ${ entity} get(Long id);
 
 /** * 分页 * @param current {@code int} 页码 * @param size {@code int} 笔数 * @param ${entity?uncap_first} {@link ${entity}} * @return {@code IPage<${entity}>} */
 IPage<${ entity}> page(int current, int size, ${ entity} ${ entity?uncap_first});
 }
 </#if>

### 业务逻辑实现 ###

在 `src/main/resources/templates` 目录下创建名为 `serviceImpl.java.ftl` 文件

package ${ package.ServiceImpl};
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import ${ package.Entity}.${ entity};
 import ${ package.Mapper}.${ table.mapperName};
 import ${ package.Service}.${ table.serviceName};
 import ${ superServiceImplClassPackage};
 import org.springframework.stereotype.Service;
 
 /** * * ${table.comment!} 服务实现类 * * * @author ${author} * @since ${date} */
 @Service
 <#if kotlin>
 open class ${ table.serviceImplName} : ${ superServiceImplClass}<${ table.mapperName}, ${ entity}>(), ${ table.serviceName} { 
 
 }
 <#else>
 public class ${ table.serviceImplName} extends ${ superServiceImplClass}<${ table.mapperName}, ${ entity}> implements ${ table.serviceName} { 
 @Override
 public boolean create(${ entity} ${ entity?uncap_first}) { 
 return super.save(${ entity?uncap_first});
 }
 
 @Override
 public boolean remove(Long id) { 
 return super.removeById(id);
 }
 
 @Override
 public boolean update(${ entity} ${ entity?uncap_first}) { 
 return super.updateById(${ entity?uncap_first});
 }
 
 @Override
 public ${ entity} get(Long id) { 
 return super.getById(id);
 }
 
 @Override
 public IPage<${ entity}> page(int current, int size, ${ entity} ${ entity?uncap_first}) { 
 Page<${ entity}> page = new Page<>(current, size);
 LambdaQueryWrapper<${ entity}> wrapper = new LambdaQueryWrapper<>();
 
 // TODO 查询
 // TODO 排序
 
 return super.page(page, wrapper);
 }
 }
 </#if>

### 请求处理控制器 ###

在 `src/main/resources/templates` 目录下创建名为 `controller.java.ftl` 文件

package ${ package.Controller};
 
 import org.springframework.web.bind.annotation.RequestMapping;
 
 <#if restControllerStyle>
 import org.springframework.web.bind.annotation.RestController;
 <#else>
 import org.springframework.stereotype.Controller;
 </#if>
 <#if superControllerClassPackage??>
 import ${ superControllerClassPackage};
 </#if>
 
 /** * * ${table.comment!} 前端控制器 * * * @author ${author} * @since ${date} */
 <#if restControllerStyle>
 @RestController
 <#else>
 @Controller
 </#if>
 @RequestMapping("<#if package.ModuleName??>/${package.ModuleName}</#if>/<#if controllerMappingHyphenStyle??>${controllerMappingHyphen}<#else>${table.entityPath}</#if>")
 <#if kotlin>
 class ${ table.controllerName}<#if superControllerClass??> : ${ superControllerClass}()</#if>
 <#else>
 <#if superControllerClass??>
 public class ${ table.controllerName} extends ${ superControllerClass} { 
 <#else>
 public class ${ table.controllerName} { 
 @Resource
 private I${ entity}Service ${ entity?uncap_first}Service;
 
 /** * 新增 * * @param ${entity?uncap_first} {@link ${entity}} * @return {@link ResponseResult} */
 @PostMapping("create")
 public ResponseResult create(@RequestBody ${ entity} ${ entity?uncap_first}) { 
 
 // 业务逻辑
 boolean created = ${ entity?uncap_first}Service.create(${ entity?uncap_first});
 if (created) { 
 return ResponseResult.success("创建成功");
 }
 
 return null;
 }
 
 /** * 删除 * * @param ${entity?uncap_first}Id {@code Long} * @return {@link ResponseResult} */
 @DeleteMapping("remove/{${entity?uncap_first}Id}")
 public ResponseResult remove(@PathVariable Long ${ entity?uncap_first}Id) { 
 // 业务逻辑
 boolean deleted = ${ entity?uncap_first}Service.remove(${ entity?uncap_first}Id);
 if (deleted) { 
 return ResponseResult.success("删除成功");
 }
 
 return null;
 }
 
 /** * 修改 * * @param ${entity?uncap_first} {@link ${entity}} * @return {@link ResponseResult} */
 @PutMapping("update")
 public ResponseResult update(@RequestBody ${ entity} ${ entity?uncap_first}) { 
 // 业务逻辑
 boolean updated = ${ entity?uncap_first}Service.update(${ entity?uncap_first});
 if (updated) { 
 return ResponseResult.success("编辑成功");
 }
 
 return null;
 }
 
 /** * 获取 * * @param ${entity?uncap_first}Id {@code Long} * @return {@link ResponseResult} */
 @GetMapping("get/{${entity?uncap_first}Id}")
 public ResponseResult get(@PathVariable Long ${ entity?uncap_first}Id) { 
 ${ entity} ${ entity?uncap_first} = ${ entity?uncap_first}Service.get(${ entity?uncap_first}Id);
 return ResponseResult.success(${ entity?uncap_first});
 }
 
 /** * 分页 * * @param current {@code int} 页码 * @param size {@code int} 笔数 * @return {@link ResponseResult} */
 @GetMapping("page")
 public ResponseResult page(
 @RequestParam int current, @RequestParam int size, @ModelAttribute ${ entity} ${ entity?uncap_first}) { 
 IPage<${ entity}> page = ${ entity?uncap_first}Service.page(current, size, ${ entity?uncap_first});
 return ResponseResult.success(page);
 }
 </#if>
 
 }
 </#if>

## 代码生成 ##

创建名为 `MyBatisPlusGenerator` 类

import com.baomidou.mybatisplus.core.toolkit.StringPool;
 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;
 
 /** * @ClassName: MyBatisPlusGenerate * @Auther: Yuu * @Date: 2020/9/7 15:21 * @Description: MyBatisPlus 代码生成器 */
 public class MyBatisPlusGenerate { 
 
 	/** * 作者 */
 	private static final String AUTHOR = "Yuu";
 
 	/** * 工作目录 */
 	private static final String USER_DIR = System.getProperty("user.dir");
 
 	/** * JDBC 连接地址 */
 	private static final String JDBC_URL = "jdbc:mysql://localhost:3306/dict_demo?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false";
 
 	/** * JDBC 驱动程序 */
 	private static final String JDBC_DRIVER_NAME = "com.mysql.jdbc.Driver";
 
 	/** * 数据库账号 */
 	private static final String JDBC_USERNAME = "root";
 
 	/** * 数据库密码 */
 	private static final String JDBC_PASSWORD = "123456";
 
 	/** * 包配置 - 父级目录 */
 	private static final String PACKAGE_PARENT = "";
 
 	/** * 包配置 - 模块目录 * 注意：如果表前缀与模块命相同，生成时会删除前缀，比如：core_admin 最终构建为 Admin, AdminController ... */
 	private static final String PACKAGE_MODULE_NAME = "";
 
 	/** * 包配置 - 实体类目录 */
 	private static final String PACKAGE_ENTITY = "domain";
 
 	/** * 包配置 - 数据访问接口目录 */
 	private static final String PACKAGE_MAPPER = "mapper";
 
 	/** * 包配置 - 业务处理接口目录 */
 	private static final String PACKAGE_SERVICE = "service";
 
 	/** * 包配置 - 业务处理实现目录 */
 	private static final String PACKAGE_SERVICE_IMPL = "service.impl";
 
 	/** * 包配置 - 控制器目录 */
 	private static final String PACKAGE_CONTROLLER = "controller";
 
 	/** * 要生成的表，用 `,` 分割 */
 	private static final String TABLES = "";
 
 	/** * 全局配置 * @return {@link GlobalConfig} */
 	private static GlobalConfig globalConfig() { 
 		GlobalConfig config = new GlobalConfig();
 		config.setOutputDir(USER_DIR + "/src/main/java");
 		config.setAuthor(AUTHOR);
 		config.setOpen(false);
 		return config;
 	}
 
 	/** * 数据源配置 * @return {@link DataSourceConfig} */
 	private static DataSourceConfig dataSourceConfig() { 
 		DataSourceConfig config = new DataSourceConfig();
 		config.setUrl(JDBC_URL);
 		config.setDriverName(JDBC_DRIVER_NAME);
 		config.setUsername(JDBC_USERNAME);
 		config.setPassword(JDBC_PASSWORD);
 		return config;
 	}
 
 	/** * 包配置 * @return {@link PackageConfig} */
 	private static PackageConfig packageConfig() { 
 		PackageConfig config = new PackageConfig();
 		// 你哪个父目录下创建包
 		config.setParent(PACKAGE_PARENT);
 		// 设置模块的名字，比如 core，生成效果为 com.qfdmy.core
 		config.setModuleName(PACKAGE_MODULE_NAME);
 		// 实体类创建在哪个包
 		config.setEntity(PACKAGE_ENTITY);
 		config.setMapper(PACKAGE_MAPPER);
 		config.setService(PACKAGE_SERVICE);
 		config.setServiceImpl(PACKAGE_SERVICE_IMPL);
 		config.setController(PACKAGE_CONTROLLER);
 		return config;
 	}
 
 	/** * 代码生成模板配置 - Freemarker * @return {@link TemplateConfig} */
 	private static TemplateConfig templateConfig() { 
 		TemplateConfig templateConfig = new TemplateConfig();
 		templateConfig.setEntity("templates/entity.java");
 		templateConfig.setMapper("templates/mapper.java");
 		templateConfig.setService("templates/service.java");
 		templateConfig.setServiceImpl("templates/serviceImpl.java");
 		templateConfig.setController("templates/controller.java");
 		templateConfig.setXml(null);
 		return templateConfig;
 	}
 
 	/** * 代码生成策略配置 * @return {@link StrategyConfig} */
 	private static StrategyConfig strategyConfig() { 
 		// 策略配置,数据库表配置
 		StrategyConfig config = new StrategyConfig();
 		// 数据库表映射到实体的命名策略
 		config.setNaming(NamingStrategy.underline_to_camel);
 		// 数据库表字段映射到实体类的命名策略
 		config.setColumnNaming(NamingStrategy.underline_to_camel);
 		// 实体是否为 lombok 模型
 		config.setEntityLombokModel(true);
 		config.setInclude(TABLES.split(","));
 		// 驼峰转连字符串
 		config.setControllerMappingHyphenStyle(true);
 		// REST 风格
 		config.setRestControllerStyle(true);
 		// 表前缀
 		config.setTablePrefix(packageConfig().getModuleName() + "_");
 		return config;
 	}
 
 	/** * 自定义配置 */
 	private static InjectionConfig injectionConfig() { 
 		InjectionConfig config = new InjectionConfig() { 
 			@Override
 			public void initMap() { 
 				// to do nothing
 			}
 		};
 
 		// 自定义输出 mapper.xml 到 resources 目录下
 		String mapperPath = "/templates/mapper.xml.ftl";
 		List<FileOutConfig> focList = new ArrayList<>();
 
 		// 自定义配置会被优先输出
 		focList.add(new FileOutConfig(mapperPath) { 
 			@Override
 			public 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 USER_DIR + "/src/main/resources/mapper/" + tableInfo.getEntityName() + "Mapper"
 						+ StringPool.DOT_XML;
 			}
 		});
 
 		config.setFileOutConfigList(focList);
 		return config;
 	}
 
 	public static void main(String[] args) { 
 		AutoGenerator generator = new AutoGenerator();
 		generator.setGlobalConfig(globalConfig());
 		generator.setDataSource(dataSourceConfig());
 		generator.setPackageInfo(packageConfig());
 		generator.setTemplate(templateConfig());
 		generator.setTemplateEngine(new FreemarkerTemplateEngine());
 		generator.setCfg(injectionConfig());
 		generator.setStrategy(strategyConfig());
 
 		generator.execute();
 	}
 
 }

## 代码格式化 ##

使用 `javaformat` 代码格式化插件格式化成 `Spring` 风格的代码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTgxMjgy_size_16_color_FFFFFF_t_70_pic_center]

## 通用的数据响应对象 ##

在 `commons/response` 目录创建 `ResponseResult` 类

/** * @ClassName: ResponseResult * @Auther: Yuu * @Date: 2020/9/7 21:00 * @Description: 通用的数据响应结果 */
    @Data
    public class ResponseResult implements Serializable { 
    
    	private static final long serialVersionUID = 5907202414434691737L;
    
    	/** * 返回失败状态码 */
    	private static final Integer SUCCESS_CODE = 200;
    
    	/** * 返回失败状态码 */
    	private static final Integer FAIL_CODE = 500;
    
    	/** * 请求成功默认消息 */
    	private static final String SUCCESS_MESSAGE = "请求成功";
    
    	/** * 请求失败默认消息 */
    	private static final String FAIL_MESSAGE = "请求失败";
    
    	/** * 状态码 */
    	private Integer code;
    
    	/** * 消息 */
    	private String message;
    
    	/** * 需要返回的数据对象 */
    	private Object data;
    
    	/** * 构造函数 * @param code * @param message * @param data */
    	private ResponseResult(Integer code, String message, Object data) { 
    		this.code = code;
    		this.message = message;
    		this.data = data;
    	}
    
    	/** * 返回成功，默认 200，消息：请求成功 * @return */
    	public static ResponseResult success() { 
    		return new ResponseResult(SUCCESS_CODE, SUCCESS_MESSAGE, null);
    	}
    
    	/** * 返回成功，自定义消息 * @param message * @return */
    	public static ResponseResult success(String message) { 
    		return new ResponseResult(SUCCESS_CODE, message, null);
    	}
    
    	/** * 返回成功，自定义数据 * @param data * @return */
    	public static ResponseResult success(Object data) { 
    		return new ResponseResult(SUCCESS_CODE, SUCCESS_MESSAGE, data);
    	}
    
    	/** * 返回成功，自定义消息，自定义数据 * @param message * @param data * @return */
    	public static ResponseResult success(String message, Object data) { 
    		return new ResponseResult(SUCCESS_CODE, message, data);
    	}
    
    	/** * 返回失败，默认 500，消息：请求失败 * @return */
    	public static ResponseResult fail() { 
    		return new ResponseResult(FAIL_CODE, FAIL_MESSAGE, null);
    	}
    
    	/** * 返回失败，自定义消息 * @param message * @return */
    	public static ResponseResult fail(String message) { 
    		return new ResponseResult(FAIL_CODE, message, null);
    	}
    
    }

## 入口类配置 ##

增加 `Mapper` 包扫描注解

@SpringBootApplication
    @MapperScan(basePackages = "com.yuu.boot.mybatis.plus.generator.mp.mapper")
    public class MpGeneratorApplication{ 
    
        public static void main(String[] args) { 
            SpringApplication.run(MpGeneratorApplication.class, args);
        }
    
    }

## 测试 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTgxMjgy_size_16_color_FFFFFF_t_70_pic_center 1]

## MyBatis-Plus-Generator Github 地址 ##

[MyBatis-Plus-Generator][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTgxMjgy_size_16_color_FFFFFF_t_70_pic_center]: /images/20221123/75ed6b6a81a249658c03528c4d491266.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM3NTgxMjgy_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221123/29f0f735673e489abc40bf54b9186113.png
[MyBatis-Plus-Generator]: https://github.com/71yuu/mybatis-plus-generator