身份认证

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最新推荐文章于 2024-01-29 13:40:56 发布

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分类专栏： util 文章标签： jwt

本文链接：https://blog.youkuaiyun.com/m0_46401243/article/details/111604042

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本文介绍了一个使用JWT (JSON Web Tokens)进行用户信息加密和解密的工具类ZDUtil，重点讲解了如何使用JWTSigner进行数据加密，并通过JWTVerifier验证和解析JWT。实例展示了如何为User对象设置过期时间和加密解密过程。

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package com.htdd.system.modules.member.util;


import com.auth0.jwt.JWTSigner;
import com.auth0.jwt.JWTVerifier;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.htdd.system.modules.member.domain.entity.User;

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class ZDUtil {


    /**
     * 密钥
     */
    private static  final String SECRET="XX#$%()(#*!()!KL<><MQLMNQNQJQK sdfkjsdrow32234545fdf>?N<:{LWPW";
    /**
     * 默认字段key:exp
     */
    private static final String EXP="exp";
    /**
     * 默认字段key:payload
     */
    private static final String PAYLOAD="payload";

    /**
     * 加密
     * @param object 加密数据
     * @param maxTime 有效期（毫秒数）
     * @param <T>
     * @return
     */
    public static <T> String encode(T object,long maxTime){
        try{
            final JWTSigner signer=new JWTSigner(SECRET);
            final Map<String ,Object> data=new HashMap<String ,Object>(10);
            ObjectMapper objectMapper=new ObjectMapper();
            String jsonString=objectMapper.writeValueAsString(object);
            data.put(PAYLOAD,jsonString);
            data.put(EXP,System.currentTimeMillis()+maxTime);
            return signer.sign(data);
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    /**
     * 数据解密
     * @param jwt 解密数据
     * @param classT 解密类型
     * @param <T>
     * @return
     * @throws Exception
     */
    public static<T> T unsign(String jwt, Class<T> classT) {
        final JWTVerifier verifier = new JWTVerifier(SECRET);
        try {
            final Map<String,Object> claims= verifier.verify(jwt);
            if (claims.containsKey(EXP) && claims.containsKey(PAYLOAD)) {
                long exp = (Long)claims.get(EXP);
                long currentTimeMillis = System.currentTimeMillis();
                if (exp > currentTimeMillis) {
                    String json = (String)claims.get(PAYLOAD);
                    ObjectMapper objectMapper = new ObjectMapper();
                    return objectMapper.readValue(json, classT);
                }
            }
            return null;
        } catch (Exception e) {
            return null;
        }
    }

    public static void main(String[] args) {
//        3600000
//        User user = new User();
//        user.setId(11L);
//        String s = encode(user,1);
//        System.out.println(s);
        User s1 =unsign("eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.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.SnCXgKMxXBLol4dTrzY5p6jcVUHA5Ke5lNT-cC3HREc\n",User.class);
        if (null == s1){
            System.out.println("身份认证过期");
        }
    }
}