34 lines
1.3 KiB
Java
34 lines
1.3 KiB
Java
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package com.example.chat.jwt;
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import com.auth0.jwt.JWT;
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import com.auth0.jwt.JWTVerifier;
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import com.auth0.jwt.algorithms.Algorithm;
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import com.auth0.jwt.interfaces.DecodedJWT;
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import org.springframework.stereotype.Component;
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public class JWTUtil {
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private static final String tokenPassword = "uziCjb";
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public static String sign(String username) {//用用户名作为被加密的对象
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String token;
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token = JWT.create()//生成jwt令牌，加密过程
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.withIssuer("llh")
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.withClaim("username", username)
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.sign(Algorithm.HMAC256(tokenPassword));
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return token;//返回加密后的token
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}
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public static String verify(String token){
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JWTVerifier jwtVerifier=JWT.require(Algorithm.HMAC256(tokenPassword)).withIssuer("llh").build();//构建一个jwt解码器
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DecodedJWT jwtToken=jwtVerifier.verify(token);//解码
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if(token.isEmpty()){//若token为空则返回false拦截
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return null;
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}
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else {
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System.out.println("认证通过：");
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System.out.println("issuer: " + jwtToken.getIssuer());
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System.out.println("username: " + jwtToken.getClaim("username").asString());
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return jwtToken.getClaim("username").asString();
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}
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}
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}
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