Springboot如何实现项目初始化及完整登录注册流程？

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目录 + idea + Spring Initializr 创建项目 + 选择项目所需的依赖 + 整体项目结构 + 创建 User 实体类并放入 Entity 下 + 创建通用的返回结果类 + 创建 controller + 创建 service 层 + 创建 Mapper / Dao 层 + 邮箱验证码、生成 Token

目录

• idea spring Initializr创建项目
• 勾选项目所需要的依赖
• 整体项目结构
• 创建User实体类放入Enity下
• 创建通用返回的结果类
• 创建controller
• 创建service层
• 创建Mapper / Dao层
• 邮箱验证码、生成Token
• 总结

idea spring Initializr创建项目

勾选项目所需要的依赖

pom.xml文件会加载勾选的依赖，也可以不勾选后面通过自己常用的pom.xml统一导入。

• Lombok 可以通过注解省去一些get，set方法。

简单项目常用pom.xml：

mybatis-plus、mybatis、

<?xml version="1.0" encoding="UTF-8"?> <project xmlns="maven.apache.org/POM/4.0.0" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="maven.apache.org/POM/4.0.0 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.example.community</groupId> <artifactId>springboot03</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot03</name> <description>springboot03</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.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <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>1.1.13</version> </dependency> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.9.1</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-mail</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-configuration-processor</artifactId> <optional>true</optional> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>

整体项目结构

创建User实体类放入Enity下

@TableName("user")是实体对应的表的名字

@TableId(type = IdType.AUTO)表的主键

@TableField(exist = false)不存在，就不会返回空。

package com.example.community.enity; import com.baomidou.mybatisplus.annotation.IdType; import com.baomidou.mybatisplus.annotation.TableField; import com.baomidou.mybatisplus.annotation.TableId; import com.baomidou.mybatisplus.annotation.TableName; import lombok.Data; @Data @TableName("user") public class User { @TableId(type = IdType.AUTO) private Integer userId; private String email; private String username; private String password; private String avatar; private String phone; @TableField(exist = false) private String code; public User(String email, String password) { this.email = email; this.password = password; } }

创建通用返回的结果类

可以使用泛型传入对应的实体类，这里我就不传了。

package com.example.community.common; import lombok.Data; @Data public class R { private Integer code; private String msg; private Object data; public R(Integer code, String msg, Object ob) { this.code = code; this.msg = msg; this.data = ob; } public R(Integer code, String msg) { this.code = code; this.msg = msg; } public static R success(String msg){ R r= new R(1,msg); return r; } public static R success(String msg,Object ob){ R r= new R(1,msg,ob); return r; } public static R error(String msg){ R r= new R(0,msg,null); return r; } }

创建controller

在controller里可以对前端的请求进行一个分发，处理。根据地址链接找到对应的controller。

登入模块，可以创建一个UserController处理用户的相关信息。

package com.example.community.controller; import com.example.community.common.R; import com.example.community.enity.User; import com.example.community.service.UserService; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.*; import javax.servlet.localhost:8090", "null"}) public class UserController { @Autowired UserService service; @PostMapping("/login") public R login(@RequestBody User user) { log.info("user"+user.toString()); return service.login(user.getEmail(), user.getPassword()); } @PostMapping("/register") @ResponseBody public R register(@RequestBody Map<String, Object> data, HttpSession session) { log.info(data.toString()); String code1 = (String) session.getAttribute("code"); String email1 = (String) session.getAttribute("email"); log.info("---------------------------"); log.info(email1); log.info(code1); log.info("---------------------------"); if(code1 == null || email1 == null){ return R.error("验证码已过期或邮箱有误"); } if (!data.get("password").equals(data.get("password_confirmation"))) { return R.error("两次密码不一致"); } if (!email1.equals(data.get("email").toString())) { return R.error("邮箱错误"); } if (!code1.equals(data.get("code").toString())) { return R.error("验证码错误"); } User user1 = new User(data.get("email").toString(), data.get("password").toString()); return service.register(user1); } }

创建service层

service层给controller层提供服务，调用dao层mapper查询数据库的数据，提供相对应的服务。

在这里我是用了mybtis-plus来进行数据库简单的查询。

用户模块的service层代码：

UserService接口

继承mybatis-plus的IService

package com.example.community.service; import com.baomidou.mybatisplus.extension.service.IService; import com.example.community.common.R; import com.example.community.enity.User; public interface UserService extends IService<User> { public R selectUserByUsername(String name); public R login(String username, String password); public R register(User user); public R logout(String token); }

UserService实现类

在这个类中，调用了mapper提供的方法。

继承ServiceImpl

package com.example.community.service.impl; import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl; import com.example.community.Mapper.UserMapper; import com.example.community.common.R; import com.example.community.enity.User; import com.example.community.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService { @Autowired private UserMapper userMapper; @Override public R selectUserByUsername(String name){ return null; } @Override public R login(String email, String password){ User user = userMapper.selectOne(new QueryWrapper<User>().eq("email", email)); if(user == null){ return R.error("用户不存在"); } if(!user.getPassword().equals(password)){ return R.error("密码错误"); } return R.success("登录成功"); } @Override public R register(User user){ User user1 = userMapper.selectOne(new QueryWrapper<User>().eq("username", user.getUsername())); if(user1 != null){ return R.error("用户已存在"); } userMapper.insert(user); return R.success("注册成功"); } @Override public R logout(String token){ return null; } }

创建Mapper / Dao层

使用了mybatis-plus，所以只需要继承BaseMapper既可。

package com.example.community.Mapper; import com.baomidou.mybatisplus.core.mapper.BaseMapper; import com.example.community.enity.User; import org.apache.ibatis.annotations.Mapper; @Mapper public interface UserMapper extends BaseMapper<User> { }

邮箱验证码、生成Token

• 使用邮箱进行登入验证码验证
• 使用jwt生成token返回给前端，服务端可以用来判断用户是否登入。并且支持跨域

实现这两个功能需要使用到一些工具类和配置，如下：

package com.example.community.utils; import io.jsonwebtoken.Jwt; import io.jsonwebtoken.JwtBuilder; import io.jsonwebtoken.Jwts; import io.jsonwebtoken.SignatureAlgorithm; import java.util.Date; import java.util.HashMap; import java.util.Map; public class JWTUtils { private static final String jwtToken = "123456Mszlu!@#$$"; public static String createToken(Long userId) { Map<String, Object> claims = new HashMap<>(); claims.put("userId", userId); JwtBuilder jwtBuilder = Jwts.builder() .signWith(SignatureAlgorithm.HS256, jwtToken) // 签发算法，秘钥为jwtToken .setClaims(claims) // body数据，要唯一，自行设置 .setIssuedAt(new Date()) // 设置签发时间 .setExpiration(new Date(System.currentTimeMillis() + 24 * 60 * 60 * 1000));// 一天的有效时间 String token = jwtBuilder.compact(); return token; } public static Map<String, Object> checkToken(String token) { try { Jwt parse = Jwts.parser().setSigningKey(jwtToken).parse(token); return (Map<String, Object>) parse.getBody(); } catch (Exception e) { e.printStackTrace(); } return null; } }

拦截器的配置

package com.example.community.handler; import com.alibaba.druid.util.StringUtils; import com.example.community.common.R; import com.example.community.utils.JsonUtil; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Component; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.HandlerInterceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @Component @Slf4j public class LoginInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object handler) throws Exception{ log.info("请求被拦截{}",request); if(!(handler instanceof HandlerMethod)){ return true; } String token = request.getHeader("Authorization"); log.info("token:{}",token); if(StringUtils.isEmpty(token)){ R r= R.error("未登录"); response.setContentType("application/json;charset=utf-8"); log.info("{}",r); response.getWriter().print(JsonUtil.objectToJson(r)); return false; } return true; } }

package com.example.community.config; import com.example.community.handler.LoginInterceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.CorsRegistry; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class WebMvcConfig implements WebMvcConfigurer { @Override public void addInterceptors(InterceptorRegistry registry) { // 用户拦截器 registry.addInterceptor(new LoginInterceptor()) // 需要拦截的请求 .addPathPatterns("/user/**","/article/**") // 需要放行的请求 .excludePathPatterns("/user/login","/user/register","/mail/**") // 添加swagger-ui的放行路径 .excludePathPatterns("/swagger-resources/**", "/webjars/**", "/v2/**", "/swagger-ui.html/**", "/doc.html/**") ; } @Override public void addCorsMappings(CorsRegistry registry) { registry.addMapping("/**") .allowedOriginPatterns("*") .allowedMethods("POST", "GET", "PUT", "OPTIONS", "DELETE") .maxAge(3600) .allowCredentials(true); } }

实现邮箱认证登入，之前写过一个，传送门

总结

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