JWT——SpringBoot整合JWT

素颜马尾好姑娘i 2022-11-26 14:58 234阅读 0赞

# 一、SpringBoot + MyBatis + JWT #

### 1、引入依赖、编写全局配置文件 ###

<dependency>
      <groupId>com.auth0</groupId>
      <artifactId>java-jwt</artifactId>
      <version>3.4.0</version>
    </dependency>
    
    
    <dependency>
      <groupId>org.mybatis.spring.boot</groupId>
      <artifactId>mybatis-spring-boot-starter</artifactId>
      <version>2.1.3</version>
    </dependency>
    
    
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.12</version>
    </dependency>
    
    
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.1.19</version>
    </dependency>
    
    
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>

server.port=8989
    
    
    spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql://localhost:3306/jwt?characterEncoding=UTF-8
    spring.datasource.username=root
    spring.datasource.password=1111
    
    mybatis.type-aliases-package=com.zy.entity
    mybatis.mapper-locations=classpath:com/zy/mapper/*.xml
    
    logging.level.com.baizhi.dao=debug

### 2、开发数据库 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center]

### 3、编写实体类 ###

@Data
    @Accessors(chain=true)
    public class User { 
        private String id;
        private String name;
        private String password;
    }

### 4、开发DAO接口和mapper.xml ###

@Mapper
    public interface UserDAO { 
        User login(User user);
    }

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.zy.dao.UserDAO">
    
        
        <select id="login" parameterType="User" resultType="User">
            select * from user where name=#{name} and password = #{password}
        </select>
    
    </mapper>

### 5、开发Service 接口以及实现类 ###

public interface UserService { 
        User login(User user);//登录接口
    }

@Service
    @Transactional
    public class UserServiceImpl implements UserService { 
        @Autowired
        private UserDAO userDAO;
        @Override
        @Transactional(propagation = Propagation.SUPPORTS)
        public User login(User user) { 
            User userDB = userDAO.login(user);
            if(userDB!=null){ 
                return userDB;
            }
            throw  new RuntimeException("登录失败~~");
        }
    }

#### 6、开发Controller ####

@RestController
    @Slf4j
    public class UserController { 
    
        @Autowired
        private UserService userService;
    
    
        @GetMapping("/user/login")
        public Map<String, Object> login(User user) { 
            log.info("用户名: [{}]", user.getName());
            log.info("密码: [{}]", user.getPassword());
            Map<String, Object> map = new HashMap<>();
            try { 
                User userDB = userService.login(user);
                Map<String, String> payload = new HashMap<>();
                payload.put("id", userDB.getId());
                payload.put("name", userDB.getName());
                //生成JWT的令牌
                String token = JWTUtils.getToken(payload);
                map.put("state", true);
                map.put("msg", "认证成功");
                map.put("token", token);//响应token
            } catch (Exception e) { 
                map.put("state", false);
                map.put("msg", e.getMessage());
            }
            return map;
        }
    }

#### 7、通过postman测试 ####

测试错误密码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center 1]  
测试正确账号密码  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center 2]

#### 8、编写测试接口 ####

@PostMapping("/user/test")
        public Map<String, Object> test(HttpServletRequest request) { 
            Map<String, Object> map = new HashMap<>();
            //处理自己业务逻辑
            String token = request.getHeader("token");
            // 验证token
            DecodedJWT verify = JWTUtils.verify(token);
            log.info("用户id: [{}]", verify.getClaim("id").asString());
            log.info("用户name: [{}]", verify.getClaim("name").asString());
            map.put("state", true);
            map.put("msg", "请求成功!");
            return map;
        }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center 3]  
不携带Token测试  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center 4]  
携带token测试  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center 5]

#### 9、存在的问题 ####

*  使用上述方式每次都要`传递token数据,每个方法都需要验证token代码冗余`,不够灵活? 如何优化
 *  使用拦截器进行优化

使用拦截器

public class JWTInterceptor implements HandlerInterceptor { 
    
        @Override
        public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { 
            Map<String, Object> map = new HashMap<>();
            //获取请求头中令牌
            String token = request.getHeader("token");
            try { 
                JWTUtils.verify(token);//验证令牌
                return true;//放行请求
            } catch (SignatureVerificationException e) { 
                e.printStackTrace();
                map.put("msg","无效签名!");
            }catch (TokenExpiredException e){ 
                e.printStackTrace();
                map.put("msg","token过期!");
            }catch (AlgorithmMismatchException e){ 
                e.printStackTrace();
                map.put("msg","token算法不一致!");
            }catch (Exception e){ 
                e.printStackTrace();
                map.put("msg","token无效!!");
            }
            map.put("state",false);//设置状态
            //将map 专为json jackson
            String json = new ObjectMapper().writeValueAsString(map);
            response.setContentType("application/json;charset=UTF-8");
            response.getWriter().println(json);
            return false;
        }
    }

@Configuration
    public class InterceptorConfig implements WebMvcConfigurer { 
    
        @Override
        public void addInterceptors(InterceptorRegistry registry) { 
            registry.addInterceptor(new JWTInterceptor())
                    .addPathPatterns("/user/test")         //其他接口token验证
                    .excludePathPatterns("/user/login");  //所有用户都放心
        }
    }

修改测试接口

@PostMapping("/user/test")
        public Map<String,Object> test(HttpServletRequest request){ 
            Map<String, Object> map = new HashMap<>();
            //处理自己业务逻辑
            String token = request.getHeader("token");
            DecodedJWT verify = JWTUtils.verify(token);
            log.info("用户id: [{}]",verify.getClaim("id").asString());
            log.info("用户name: [{}]",verify.getClaim("name").asString());
            map.put("state",true);
            map.put("msg","请求成功!");
            return map;
        }

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzM3OTg5OTgw_size_16_color_FFFFFF_t_70_pic_center 6]

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