SpringBoot如何实现高效的项目开发？

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创建项目步骤：

1.创建项目目录

2.添加pom.xml文件

3.修改配置文件

4.创建测试接口

5.使用截断器实现

6.需求：用户登录成功后，才能访问其他接口。未登录则提示需要登录。

项目仓库地址：[https://gitee.com/aiw-nine/sprin](https://gitee.com/aiw-nine/sprin)

目录

• 添加pom.xml
• 修改配置文件
• 创建简单的测试接口
• 使用拦截器实现

需求：只有用户登录成功后，才能访问其它接口，否则提示需要进行登录

项目仓库地址：gitee.com/aiw-nine/springboot_jwt_verify

添加pom.xml

新建Spring Boot（2.7.2）项目，添加如下依赖：

<?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>2.7.2</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>com.eaiw</groupId> <artifactId>springboot_jwt_verify</artifactId> <version>0.0.1-SNAPSHOT</version> <name>springboot_jwt_verify</name> <description>springboot_jwt_verify</description> <properties> <java.version>17</java.version> <mysql.version>5.1.40</mysql.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <!-- 引入jwt--> <dependency> <groupId>com.auth0</groupId> <artifactId>java-jwt</artifactId> <version>3.8.2</version> </dependency> <!--MySQL驱动--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <!--mybatis-plus启动器--> <dependency> <groupId>com.baomidou</groupId> <artifactId>mybatis-plus-boot-starter</artifactId> <version>3.5.1</version> </dependency> <!--redis缓存--> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> <configuration> <excludes> <exclude> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </exclude> </excludes> </configuration> </plugin> </plugins> </build> </project>

修改配置文件

spring:
# 配置数据源信息
datasource:
# 配置数据源类型
type: com.zaxxer.hikari.HikariDataSource
# 配置连接数据库的各个信息
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/test?characterEncoding=utf-8&useSSL=false
username: root
password: 123456

创建简单的测试接口

package com.aiw.springboot_jwt_verify.controller; import com.aiw.springboot_jwt_verify.entity.User; import com.aiw.springboot_jwt_verify.response.R; import com.aiw.springboot_jwt_verify.service.UserService; import com.aiw.springboot_jwt_verify.utils.JwtUtil; import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Objects; @RestController @RequestMapping("/user") public class UserController { @Autowired private UserService userService; /** * 登录，此处只做简单测试 * * @param user * @return */ @RequestMapping(value = "/login", method = RequestMethod.POST) public R<Map> login(@RequestBody User user) { // 进行数据库查询 LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>(); wrapper.eq(User::getName, user.getName()).eq(User::getPwd, user.getPwd()); User one = userService.getOne(wrapper); if (Objects.nonNull(one)) { // 登录成功，根据用户id生成token并返回登录成功结果 Map<String, Object> map = new HashMap<>(); map.put("user", one); map.put("token", JwtUtil.sign(one.getId())); return R.success("登录成功", map); } return R.fail("登录失败"); } /** * 此处做测试，看用户在未登录时，能否访问到此接口 * * @return */ @RequestMapping(value = "/list", method = RequestMethod.GET) public R<List<User>> index() { return R.success("访问成功", userService.list()); } }

使用拦截器实现

创建JwtInterceptor.java类，实现HandlerInterceptor接口

package com.aiw.springboot_jwt_verify.interceptor; import com.aiw.springboot_jwt_verify.response.R; import com.aiw.springboot_jwt_verify.utils.JwtUtil; import com.fasterxml.jackson.databind.ObjectMapper; import lombok.extern.slf4j.Slf4j; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.HandlerInterceptor; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.util.Objects; @Slf4j public class JwtInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // 从 http 请求头中取出 token String token = request.getHeader("token"); // 如果不是映射到方法直接通过 if (!(handler instanceof HandlerMethod)) { return true; } if (Objects.nonNull(token) && JwtUtil.verify(token)) { return true; } response.setContentType("application/json; charset=utf-8"); response.getWriter().write(new ObjectMapper().writeValueAsString(R.error("未通过身份认证"))); return false; } }

注册拦截器，新建配置类WebConfig.java，实现WebMvcConfigurer接口

package com.aiw.springboot_jwt_verify.config; import com.aiw.springboot_jwt_verify.interceptor.JwtInterceptor; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer; @Configuration public class WebConfig implements WebMvcConfigurer { @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(new JwtInterceptor()) .addPathPatterns("/**") // 排除的请求路径 .excludePathPatterns("/user/login"); } }

启动项目，使用ApiPost进行接口测试。首先在未登录状态下，访问/user/list接口

此时先进行登录，访问/user/login接口

复制登录时的token放于/user/list接口的请求头，进行访问

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