jwt实现token模拟登陆

Java实现JWT令牌生成与验证

原创于 2024-10-24 09:38:33 发布 · 401 阅读

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#1024程序员节 #java

package cn.e4j.core.interceptor;

import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class JwtTokenUtil {

    private static final String SECRET_KEY = "defaultSecret"; // 替换为你的密钥

    public static String generateToken(String username) {
        return Jwts.builder()
                .setSubject(username)
                .signWith(SignatureAlgorithm.HS512, SECRET_KEY)
                .compact();
    }

    public static boolean isTokenExpired(String token) {
        try {
            Jwts.parser().setSigningKey(SECRET_KEY).parseClaimsJws(token);
            return false; // Token is valid and not expired
        } catch (Exception e) {
            return true; // Token is expired or invalid
        }
    }

    public static void main(String[] args) throws Exception {

        JwtTokenUtil.generateToken("admin");
        // 生成 JWT 令牌
       /* String token = JwtTokenUtil.generateToken("admin");

        // 模拟请求
        URL url = new URL("http://localhost:8080");
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        connection.setRequestMethod("GET");
        connection.setRequestProperty("Authorization", "Bearer " + token);

        // 读取响应
        int responseCode = connection.getResponseCode();
        System.out.println("Response Code: " + responseCode);

        BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String inputLine;
        StringBuilder response = new StringBuilder();

        while ((inputLine = in.readLine()) != null) {
            response.append(inputLine);
        }
        in.close();

        System.out.println("Response: " + response.toString());*/
    }
}