一、添加代码生成器

用来自动为数据库映射类建立：mapper、service、controller

注：代码生成器的写法，参考官方文档：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) { // 代码生成器 AutoGenerator mpg = new AutoGenerator(); // 全局配置 GlobalConfig gc = new GlobalConfig(); //这样获取到的是父项目的目录 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); 实体属性 Swagger2 注解 mpg.setGlobalConfig(gc); // 数据源配置 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"); //设置父包 //自定义生成路径 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"); //实体类 pc.setPathInfo(pathInfo); mpg.setPackageInfo(pc); // 自定义配置 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); //生成时，继承的父类 strategy.setSuperEntityClass(BasePojo.class); strategy.setEntityLombokModel(true); strategy.setRestControllerStyle(true); // 公共父类 strategy.setSuperControllerClass("你自己的父类控制器,没有就不用设置!"); // 写于父类中的公共字段 strategy.setSuperEntityColumns("id"); strategy.setInclude("ums_admin"); strategy.setControllerMappingHyphenStyle(true); strategy.setTablePrefix(pc.getModuleName() + "_"); mpg.setStrategy(strategy); mpg.setTemplateEngine(new FreemarkerTemplateEngine()); mpg.execute(); }}

二、导入需要的jar包

前期需要导入的包有：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、创建启动类

启动类必须创建在父包下面，注意在SpringBoot中，并不是不扫包，而是框架帮助完成了这件事，它会扫描启动类所在包下的所有类及其子包中的类

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、创建配置文件（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: #文件传输配置 multipart: max-file-size: 5MB max-request-size: 10MB#运行的过程中输出sql语句（日志信息）logging: level: com.hanmh.mapper: debug

五、返回值统一定义

1、ResultJson

package com.hanmh.pojo; import lombok.Data; @Datapublic class ResultJson { private Integer code; //200成功，500错误 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

定义4种返回代号和返回信息，使用枚举类进行实现

package com.hanmh.pojo; import lombok.Data;import lombok.Getter; @Getterpublic enum ResultCode { SUCCESS(200, "请求成功"), ERROR(500, "请求失败"), NOAUTH(401, "用户未登录或者登录超时"), //操作时 NOPREMISSION(403, "没有此权限"); private Integer code; private String message; //枚举类型的构造默认为私有 private ResultCode(Integer code, String message) { this.code = code; this.message = message; }}

六、创建基础pojo

在所有的数据库表种，共有的字段是ID，现在将id独立出来

1、导入 mybatis-plus-annotation包

为了使用该包内部的IdType等类内部提供的注解，以告诉BasePojo中某些字段在数据库表中的存在与否

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

2、BasePojo类

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; //做分页操作需要的字段 @TableField(exist = false) private Integer pageNO; @TableField(exist = false) private Integer pageSize;}

七、后端添加数据

1、密码加密

（1）需要使用安全包提供加密服务（security）

<dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-core</artifactId></dependency>

2、将加密类（BCryptPasswordEncoder）放入IOC容器

在SpringBoot环节，需要将某个类加入IOC容器，就需要在配置类中，配置@Bean节点

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

注：使用此方法对数据进行加密的原因：此加密方法相同明文密码多次可以生成不同的密文，而MD5相同密码则会生成相同的密文

3、后端添加数据简单实现

@PostMapping("/add")ResultJson add(UmsAdmin umsAdmin) throws InterruptedException, IOException { //对密码加密 umsAdmin.setPassword(passwordEncoder.encode(umsAdmin.getPassword())); //TimeUnit.SECONDS.sleep(2); return ResultJson.success(adminService.save(umsAdmin), "添加用户成功");}

八、前端页面添加功能

1、添加用户（按钮和弹窗）

<el-button>：elementUI按钮标签<el-button type="primary" plain @click="add">添加用户</el-button><!-- <el-dialog> 代表弹窗 :visible.sync表示显示或隐藏--><!-- close-on-click-modal代表点击对话框以外区域是否可以关闭 --><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）添加用户功能

add() { this.dialog.show = true this.dialog.title = "添加用户"}

（2）添加内容弹窗

<template> <div> <el-form :model="forms" :rules="rules" ref="ruleForm" label-width="100px"> <el-form-item label="登录名" prop="loginName"> <el-input v-model="forms.loginName" placeholder="请输入登录名"></el-input> </el-form-item> <el-form-item label="昵称" prop="name"> <el-input v-model="forms.name" placeholder="请输入昵称"></el-input> </el-form-item> <el-form-item label="密码" prop="password"> <el-input v-model="forms.password" placeholder="请输入密码" show-password></el-input> </el-form-item> <el-form-item label="邮箱" prop="email"> <el-input v-model="forms.email" placeholder="请输入邮箱"></el-input> </el-form-item> <el-form-item label="手机号" prop="phone"> <el-input v-model="forms.phone" placeholder="请输入手机号"></el-input> </el-form-item> <el-form-item label="头像" 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: '这是一张图片' }, rules:{ loginName:[ {required: true, message: '请输入登录名', trigger: 'blur'}, {min : 1, max: 20, message: '长度在1-20之间', trigger: 'change'} ], name:[ {required: true, message: '请输入昵称', trigger: 'blur'}, {min : 1, max: 20, message: '长度在1-20之间', trigger: 'change'} ], password:[ {required: true, message: '请输入密码', trigger: 'blur'}, {min : 1, max: 100, message: '长度在1-100之间', trigger: 'change'} ], email:[ {required: true, message: '请输入邮箱', trigger: 'blur'}, {min : 1, max: 50, message: '长度在1-50之间', trigger: 'change'}, {type: 'email', message: '请输入正确格式的邮箱', trigger: 'blur'} ], phone:[ {required: true, message: '请输入电话号', trigger: 'blur'}, {min : 1, max: 20, message: '长度在1-20之间', trigger: 'change'}, {pattern: /^1([38][0-9]|4[5-9]|5[0-3,5-9]|66|7[0-8]|9[89])[0-9]{8}$/, message: '请输入正确的手机号', trigger: 'blur'} ], } } }, methods:{ save() { //提交表单前需要对表单再次进行验证 //获取表单对象 //表单二次验证 this.$refs['ruleForm'].validate((flag) => { //如果通过验证，则进行表单数据提交 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、此时前端给后端发post请求会出现跨域错误

跨域错误解决需要在后端植入跨域过滤器（Bean节点）

//跨域问题解决@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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