Springboot封装JWT工具类，实现拦截器

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我是靠谱客的博主魔幻纸飞机，最近开发中收集的这篇文章主要介绍Springboot封装JWT工具类，实现拦截器，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

将JWTUtils放入Utils包中
代码如下

JWTUtils

import com.auth0.jwt.JWT;
import com.auth0.jwt.JWTCreator;
import com.auth0.jwt.JWTVerifier;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.interfaces.DecodedJWT;

import java.util.Calendar;
import java.util.Map;

public class JWTUtils {
    private static final String SING="";//这里写上自己的令牌

    /**
     * 生成token
     * @param map
     * @return
     */
    public static String getToken(Map<String,String> map){
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DATE,7);//默认7天过期
        JWTCreator.Builder builder = JWT.create();
        map.forEach((k,v)->{
            builder.withClaim(k,v);
        });
        String token = builder.withExpiresAt(instance.getTime())
                .sign(Algorithm.HMAC384(SING));

        return token;
    }

    /**
     * 验证token合法性
     * @param token
     */
    public static void verify(String token){
        JWT.require(Algorithm.HMAC384(SING)).build().verify(token);
    }

    /**
     * 返回JWT错误信息
     * @param token
     * @return
     */
    public static DecodedJWT getTokenInfo(String token){
        DecodedJWT verify = JWT.require(Algorithm.HMAC384(SING)).build().verify(token);
        return verify;
    }
}

JWTInterceptor

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import tk.shindebonair.lisan.common.CommonResponse;
import tk.shindebonair.lisan.utils.JWTUtils;

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

@Component
public class JWTInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        CommonResponse commonResponse;
        String token = request.getHeader("token");//请求头中的token

        try{
            JWTUtils.verify(token);
            //commonResponse = CommonResponse.createForSuccess("请求成功",token);
            return true;
        }catch (Exception e){
            commonResponse = CommonResponse.createForError("token无效");
        }
        String json = new ObjectMapper().writeValueAsString(commonResponse);
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().println(json);
        return false;
    }
}

InterceptorConfig

package tk.shindebonair.lisan.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import tk.shindebonair.lisan.interceptors.JWTInterceptor;

@Configuration
public class InterceptorConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new JWTInterceptor())
                .addPathPatterns("/**")
                .excludePathPatterns("/user/**");
    }
}