Spring Boot JWT 用户认证

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https://github.com/jwtk/jjwt

代码结构如图：需要源码联系QQ：47262947

1. 添加 Maven 引用 

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-api</artifactId>
    <version>0.11.0</version>
</dependency>
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-impl</artifactId>
    <version>0.11.0</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-jackson</artifactId> <!-- or jjwt-gson if Gson is preferred -->
    <version>0.11.0</version>
    <scope>runtime</scope>
</dependency>
<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.3.7</version>
</dependency>

2. 添加 annotation JwtIgnore 用于忽略不需要验证的接口

package com.vipsoft.web.boot.annotation;

import java.lang.annotation.*;


@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface JwtIgnore {
}

3. 添加工具类 JwtUtils

package com.vipsoft.web.boot.utils;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;


@ConfigurationProperties(prefix = "vipsoft.jwt")
@Component
public class JwtUtils {
    private Logger logger = LoggerFactory.getLogger(getClass());
    private String secret;
    private long expire;
    private String header;

    /**
     * 生成jwt token
     */
    public String generateToken(long userId) {
        Date nowDate = new Date();
        //过期时间
        Date expireDate = new Date(nowDate.getTime() + expire * 1000);

        return Jwts.builder()
                .setHeaderParam("typ", "JWT")
                .setSubject(userId+"")
                .setIssuedAt(nowDate)
                .setExpiration(expireDate)
                .signWith(SignatureAlgorithm.HS256, secret)
                .compact();
    }

    public Claims getClaimByToken(String token) {
        try {
            return Jwts.parser()
                    .setSigningKey(secret)
                    .parseClaimsJws(token)
                    .getBody();
        }catch (Exception e){
            logger.debug("validate is token error ", e);
            return null;
        }
    }

    /**
     * token是否过期
     * @return  true：过期
     */
    public boolean isTokenExpired(Date expiration) {
        return expiration.before(new Date());
    }

    public String getSecret() {
        return secret;
    }

    public void setSecret(String secret) {
        this.secret = secret;
    }

    public long getExpire() {
        return expire;
    }

    public void setExpire(long expire) {
        this.expire = expire;
    }

    public String getHeader() {
        return header;
    }

    public void setHeader(String header) {
        this.header = header;
    }
}

4. 添加拦截器 AuthorizationInterceptor

package com.vipsoft.web.boot.interceptor;


import cn.hutool.core.util.StrUtil;
import com.vipsoft.web.boot.annotation.JwtIgnore;
import com.vipsoft.web.boot.exception.CustomException;
import com.vipsoft.web.boot.utils.JwtUtils;
import io.jsonwebtoken.Claims;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;


@Component
public class AuthorizationInterceptor extends HandlerInterceptorAdapter {
    private Logger logger = LoggerFactory.getLogger(this.getClass());

    @Autowired
    private JwtUtils jwtUtils;


    public static final String USER_KEY = "userId";

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        // 忽略带JwtIgnore注解的请求, 不做后续token认证校验
        if (handler instanceof HandlerMethod) {
            HandlerMethod handlerMethod = (HandlerMethod) handler;
            JwtIgnore jwtIgnore = handlerMethod.getMethodAnnotation(JwtIgnore.class);
            if (jwtIgnore != null) {
                return true;
            }
        }

        if (HttpMethod.OPTIONS.equals(request.getMethod())) {
            response.setStatus(HttpServletResponse.SC_OK);
            return true;
        }

        //获取用户凭证
        String token = request.getHeader(jwtUtils.getHeader());
        if (StrUtil.isBlank(token)) {
            token = request.getParameter(jwtUtils.getHeader());
        }

        //凭证为空
        if (StrUtil.isBlank(token)) {
            throw new CustomException(HttpStatus.UNAUTHORIZED.value(), "token 不能为空");
        }

        Claims claims = jwtUtils.getClaimByToken(token);
        if (claims == null || jwtUtils.isTokenExpired(claims.getExpiration())) {
            throw new CustomException(HttpStatus.UNAUTHORIZED.value(), "token  失效，请重新登录");
        }

        //设置userId到request里，后续根据userId，获取用户信息
        request.setAttribute(USER_KEY, Long.parseLong(claims.getSubject()));

        return true;
    }
}

5. 添加 WebConfig，启用拦截器

package com.vipsoft.web.boot.config;

import com.vipsoft.web.boot.interceptor.AuthorizationInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
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 WebConfig implements WebMvcConfigurer {
    @Autowired
    private AuthorizationInterceptor authorizationInterceptor;

    /**
     * 添加拦截器
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        //拦截路径可自行配置多个 可用 ，分隔开
        registry.addInterceptor(authorizationInterceptor).addPathPatterns("/**");
    }

    /**
     * 跨域支持
     *
     * @param registry
     */
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("/**")
                .allowedOrigins("*")
                .allowCredentials(true)
                .allowedMethods("GET", "POST", "DELETE", "PUT", "PATCH", "OPTIONS", "HEAD")
                .maxAge(3600 * 24);
    }

}

6. 添加返回对象 Result

package com.vipsoft.web.boot.utils;

 

/**
 * 返回的对象，项目中要移到Core中
 */ 
public class Result<T> {
    //操作代码
    int code;
    //提示信息
    String message;

    T Data;

    public Result(int code, String message){
        this.code = code;
        this.message = message;
    }

    public Result(int code, String message,T data){
        this.code = code;
        this.message = message;
        this.setData(data);
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public T getData() {
        return Data;
    }

    public void setData(T data) {
        Data = data;
    }
}

7. 添加自定义异常类 CustomException.java 用于拦截器中的异常捕获

package com.vipsoft.web.boot.exception;

public class CustomException extends RuntimeException {
    private static final long serialVersionUID = 1L;

    private int code;
    private String msg;

    public CustomException(String msg) {
        super(msg);
        this.code = 500;
        this.msg = msg;
    }

    public CustomException(String msg, Throwable e) {
        super(msg, e);
        this.msg = msg;
    }

    public CustomException(int code, String msg) {
        super(msg);
        this.code = code;
        this.msg = msg;
    }

    public CustomException(int code, String msg, Throwable e) {
        super(msg, e);
        this.code = code;
        this.msg = msg;
    }

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }


}

8. 添加全局异常处理类 GlobalExceptionHandler.java , 可以将 返回 前端的数据处理成 JSON格式

package com.vipsoft.web.boot.exception;

import com.vipsoft.web.boot.utils.Result;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.List;

/**
 * 全局异常处理器
 */
@RestControllerAdvice
public class GlobalExceptionHandler {

    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    /**
     * 处理自定义异常
     */
    @ExceptionHandler(CustomException.class)
    public Result handleException(CustomException e) {
        // 打印异常信息
        logger.error("### 异常信息:{} ###", e.getMessage());
        return new Result(e.getCode(), e.getMessage());
    }

    /**
     * 参数错误异常
     */
    @ExceptionHandler({MethodArgumentNotValidException.class, BindException.class})
    public Result handleException(Exception e) {

        if (e instanceof MethodArgumentNotValidException) {
            MethodArgumentNotValidException validException = (MethodArgumentNotValidException) e;
            BindingResult result = validException.getBindingResult();
            StringBuffer errorMsg = new StringBuffer();
            if (result.hasErrors()) {
                List<ObjectError> errors = result.getAllErrors();
                errors.forEach(p -> {
                    FieldError fieldError = (FieldError) p;
                    errorMsg.append(fieldError.getDefaultMessage()).append(",");
                    logger.error("### 请求参数错误：{" + fieldError.getObjectName() + "},field{" + fieldError.getField() + "},errorMessage{" + fieldError.getDefaultMessage() + "}");
                });
            }
        } else if (e instanceof BindException) {
            BindException bindException = (BindException) e;
            if (bindException.hasErrors()) {
                logger.error("### 请求参数错误: {}", bindException.getAllErrors());
            }
        }
        return new Result(10001, "参数无效");
    }

    /**
     * 处理所有不可知的异常
     */
    @ExceptionHandler(Exception.class)
    public Result handleOtherException(Exception e) {
        //打印异常堆栈信息
        e.printStackTrace();
        // 打印异常信息
        logger.error("### 不可知的异常:{} ###", e.getMessage());
        return new Result(40001, "系统内部错误");
    }

}

9. 配置 application.yml

vipsoft:
  jwt:
    # 加密秘钥
    secret: d3d3LnZpcHNvZnQuY29tLmNuLjQ3MjYyOTQ3LnNwcmluZyBib290
    # token有效时长，单位秒
    expire: 60 # 方便测试，设成 60 秒
    header: token

10. 登录测试代码

    /**
     * 登录
     */
    @JwtIgnore
    @GetMapping("login")
    public Map<String, Object> login(HttpServletRequest request){

        //用户登录
        long  userId = 47262947;

        //生成token
        String token = jwtUtils.generateToken(userId);

        Map<String, Object> map = new HashMap<>();
        map.put("token", token);
        map.put("expire", jwtUtils.getExpire());

        return map;
    }

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