用來自動為數據庫映射類建立：mapper、service、controller

注：代碼生成器的寫法，參考官方文檔：https://mp.baomidou.com/

package com.hanmh.utils;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 com.hanmh.pojo.BasePojo; import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map; public class HanGenerator { public static void main(String[] args) { // 代碼生成器 AutoGenerator mpg = new AutoGenerator(); // 全局配置 GlobalConfig gc = new GlobalConfig(); //這樣獲取到的是父項目的目錄 String projectPath = System.getProperty('user.dir'); String pojoProject = 'pojo' + '/src/main/java/com/hanmh/pojo'; String otherProject = 'admin'; //gc.setOutputDir(projectPath + '/src/main/java'); gc.setAuthor('hanmh'); gc.setOpen(false); // gc.setSwagger2(true); 實體屬性 Swagger2 注解 mpg.setGlobalConfig(gc); // 數據源配置 DataSourceConfig dsc = new DataSourceConfig(); dsc.setUrl('jdbc:mysql://39.105.231.52:3306/db?useUnicode=true&useSSL=false&characterEncoding=utf8'); // dsc.setSchemaName('public'); dsc.setDriverName('com.mysql.jdbc.Driver'); dsc.setUsername('root'); dsc.setPassword('123456'); mpg.setDataSource(dsc); // 包配置 PackageConfig pc = new PackageConfig(); pc.setParent('com.hanmh'); //設置父包 //自定義生成路徑 Map<String,String> pathInfo = new HashMap<String,String>(); pathInfo.put('entity_path', projectPath + '/' + pojoProject); //pojo位置 pathInfo.put('controller_path', projectPath + '/' + otherProject + '/src/main/java/com/hanmh/controller'); pathInfo.put('service_impl_path', projectPath + '/' + otherProject + '/src/main/java/com/hanmh/service/impl'); pathInfo.put('service_path', projectPath + '/' + otherProject + '/src/main/java/com/hanmh/service'); pathInfo.put('mapper_path', projectPath + '/' + otherProject + '/src/main/java/com/hanmh/mapper'); pathInfo.put('xml_path', projectPath + '/' + otherProject + '/src/main/resources/com/hanmh/mapper'); pc.setEntity('pojo'); //實體類 pc.setPathInfo(pathInfo); mpg.setPackageInfo(pc); // 自定義配置 InjectionConfig cfg = new InjectionConfig() { @Override public void initMap() {// to do nothing } }; // 如果模板引擎是 freemarker String templatePath = '/templates/mapper.xml.ftl'; // 策略配置 StrategyConfig strategy = new StrategyConfig(); strategy.setNaming(NamingStrategy.underline_to_camel); strategy.setColumnNaming(NamingStrategy.underline_to_camel); //生成時，繼承的父類 strategy.setSuperEntityClass(BasePojo.class); strategy.setEntityLombokModel(true); strategy.setRestControllerStyle(true); // 公共父類 strategy.setSuperControllerClass('你自己的父類控制器,沒有就不用設置!'); // 寫于父類中的公共字段 strategy.setSuperEntityColumns('id'); strategy.setInclude('ums_admin'); strategy.setControllerMappingHyphenStyle(true); strategy.setTablePrefix(pc.getModuleName() + '_'); mpg.setStrategy(strategy); mpg.setTemplateEngine(new FreemarkerTemplateEngine()); mpg.execute(); }}二、導入需要的jar包

前期需要導入的包有：mybatis-plus、mysql、duracloud（工具包）、pojo、spring-boot-starter-web

<dependency> <groupId>com.hanmh</groupId> <artifactId>pojo</artifactId></dependency><dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId></dependency><dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId></dependency><dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency><dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId></dependency><dependency> <groupId>org.duracloud</groupId> <artifactId>common</artifactId></dependency>三、創建啟動類

啟動類必須創建在父包下面，注意在SpringBoot中，并不是不掃包，而是框架幫助完成了這件事，它會掃描啟動類所在包下的所有類及其子包中的類

package com.hanmh; import org.mybatis.spring.annotation.MapperScan;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication@MapperScan('com.hanmh.mapper')public class AdminRun { public static void main(String[] args) { SpringApplication.run(AdminRun.class); }}四、創建配置文件（application.yml）

server: port: 8080spring: application: name: admin datasource: driver-class-name: com.mysql.jdbc.Driver url: jdbc:mysql://39.105.231.52:3306/db?useUnicode=true&useSSL=false&characterEncoding=utf8 username: root password: 123456 hikari: maximum-pool-size: 20 minimum-idle: 10 servlet: #文件傳輸配置 multipart: max-file-size: 5MB max-request-size: 10MB#運行的過程中輸出sql語句（日志信息）logging: level: com.hanmh.mapper: debug五、返回值統一定義1、ResultJson

package com.hanmh.pojo; import lombok.Data; @Datapublic class ResultJson { private Integer code; //200成功，500錯誤 private Object obj; private String message; public ResultJson(ResultCode resultCode, Object obj) { this.code = resultCode.getCode(); this.message = resultCode.getMessage(); this.obj = obj; } public ResultJson(ResultCode resultCode, Object obj, String message) { this.code = resultCode.getCode(); this.message = message; this.obj = obj; } public static ResultJson success(Object obj) { return new ResultJson(ResultCode.SUCCESS, obj); } public static ResultJson success(Object obj, String message) { return new ResultJson(ResultCode.SUCCESS, obj, message); } public static ResultJson error(Object obj) { return new ResultJson(ResultCode.ERROR, obj); } public static ResultJson error() { return new ResultJson(ResultCode.ERROR, null); } public static ResultJson error(String message) { return new ResultJson(ResultCode.ERROR, null, message); }}2、ResultCode

定義4種返回代號和返回信息，使用枚舉類進行實現

package com.hanmh.pojo; import lombok.Data;import lombok.Getter; @Getterpublic enum ResultCode { SUCCESS(200, '請求成功'), ERROR(500, '請求失敗'), NOAUTH(401, '用戶未登錄或者登錄超時'), //操作時 NOPREMISSION(403, '沒有此權限'); private Integer code; private String message; //枚舉類型的構造默認為私有 private ResultCode(Integer code, String message) { this.code = code; this.message = message; }}六、創建基礎pojo

在所有的數據庫表種，共有的字段是ID，現在將id獨立出來

為了使用該包內部的IdType等類內部提供的注解，以告訴BasePojo中某些字段在數據庫表中的存在與否

<dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-annotation</artifactId> <version>3.0-RELEASE</version></dependency>2、BasePojo類

package com.hanmh.pojo; import com.baomidou.mybatisplus.annotation.IdType;import com.baomidou.mybatisplus.annotation.TableField;import com.baomidou.mybatisplus.annotation.TableId;import lombok.Data;import org.omg.CORBA.IDLType; @Datapublic class BasePojo { @TableId(type = IdType.AUTO) private Integer id; //做分頁操作需要的字段 @TableField(exist = false) private Integer pageNO; @TableField(exist = false) private Integer pageSize;}七、后端添加數據1、密碼加密

（1）需要使用安全包提供加密服務（security）

<dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-core</artifactId></dependency>2、將加密類（BCryptPasswordEncoder）放入IOC容器

在SpringBoot環節，需要將某個類加入IOC容器，就需要在配置類中，配置@Bean節點

@Configurationpublic class AdminConfig { @Bean //將BCryptPasswordEncoder放進IOC容器 BCryptPasswordEncoder getPasswordEncoder() { return new BCryptPasswordEncoder(); }}

注：使用此方法對數據進行加密的原因：此加密方法相同明文密碼多次可以生成不同的密文，而MD5相同密碼則會生成相同的密文

@PostMapping('/add')ResultJson add(UmsAdmin umsAdmin) throws InterruptedException, IOException { //對密碼加密 umsAdmin.setPassword(passwordEncoder.encode(umsAdmin.getPassword())); //TimeUnit.SECONDS.sleep(2); return ResultJson.success(adminService.save(umsAdmin), '添加用戶成功');}八、前端頁面添加功能1、添加用戶（按鈕和彈窗）

<el-button>：elementUI按鈕標簽<el-button type='primary' plain @click='add'>添加用戶</el-button><!-- <el-dialog> 代表彈窗 :visible.sync表示顯示或隱藏--><!-- close-on-click-modal代表點擊對話框以外區域是否可以關閉 --><el-dialog :title='dialog.title' :visible.sync='dialog.show':close-on-click-modal='false'width='450px'> <AdminEdit :show.sync='dialog.show' v-if='dialog.show'></AdminEdit></el-dialog>

（1）添加用戶功能

add() { this.dialog.show = true this.dialog.title = '添加用戶'}

（2）添加內容彈窗

<template> <div> <el-form :model='forms' :rules='rules' ref='ruleForm' label-width='100px'> <el-form-item label='登錄名' prop='loginName'> <el-input v-model='forms.loginName' placeholder='請輸入登錄名'></el-input> </el-form-item> <el-form-item label='昵稱' prop='name'> <el-input v-model='forms.name' placeholder='請輸入昵稱'></el-input> </el-form-item> <el-form-item label='密碼' prop='password'> <el-input v-model='forms.password' placeholder='請輸入密碼' show-password></el-input> </el-form-item> <el-form-item label='郵箱' prop='email'> <el-input v-model='forms.email' placeholder='請輸入郵箱'></el-input> </el-form-item> <el-form-item label='手機號' prop='phone'> <el-input v-model='forms.phone' placeholder='請輸入手機號'></el-input> </el-form-item> <el-form-item label='頭像' prop='imgobj'> </el-form-item> <el-form-item> <el-button size='small' type='primary' plain @click='save'>保存</el-button> </el-form-item> </el-form> </div></template> <script> export default{ name: ’AdminEdit’, props:{ show:{ type: Boolean } }, data(){ return { forms: { loginName: ’’, name: ’’, password: ’’, email: ’’, phone: ’’, imgobj: ’這是一張圖片’ }, rules:{ loginName:[ {required: true, message: ’請輸入登錄名’, trigger: ’blur’}, {min : 1, max: 20, message: ’長度在1-20之間’, trigger: ’change’} ], name:[ {required: true, message: ’請輸入昵稱’, trigger: ’blur’}, {min : 1, max: 20, message: ’長度在1-20之間’, trigger: ’change’} ], password:[ {required: true, message: ’請輸入密碼’, trigger: ’blur’}, {min : 1, max: 100, message: ’長度在1-100之間’, trigger: ’change’} ], email:[ {required: true, message: ’請輸入郵箱’, trigger: ’blur’}, {min : 1, max: 50, message: ’長度在1-50之間’, trigger: ’change’}, {type: ’email’, message: ’請輸入正確格式的郵箱’, trigger: ’blur’} ], phone:[ {required: true, message: ’請輸入電話號’, trigger: ’blur’}, {min : 1, max: 20, message: ’長度在1-20之間’, trigger: ’change’}, {pattern: /^1([38][0-9]|4[5-9]|5[0-3,5-9]|66|7[0-8]|9[89])[0-9]{8}$/, message: ’請輸入正確的手機號’, trigger: ’blur’} ], } } }, methods:{ save() { //提交表單前需要對表單再次進行驗證 //獲取表單對象//表單二次驗證 this.$refs[’ruleForm’].validate((flag) => { //如果通過驗證，則進行表單數據提交 if(flag === true) { this.request(’/umsadmin/add’, ’post’, this.forms, response => { this.$message.success(response.message) }) } }) }, changeimg(file, fileList) { this.forms.imgobj = file.raw }, removeimg() { this.forms.imgobj = null } } }</script> <style></style>2、此時前端給后端發post請求會出現跨域錯誤

跨域錯誤解決需要在后端植入跨域過濾器（Bean節點）

//跨域問題解決@BeanCorsFilter getCorsFilter() { UrlBasedCorsConfigurationSource configurationSource = new UrlBasedCorsConfigurationSource(); CorsConfiguration corsConfiguration = new CorsConfiguration(); corsConfiguration.addAllowedHeader('*'); corsConfiguration.addAllowedMethod('*'); corsConfiguration.addAllowedOrigin('*'); //域名 configurationSource.registerCorsConfiguration('/**', corsConfiguration); return new CorsFilter(configurationSource);}

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