ADD file via upload

flower_back/src/main/java/com/example/flower/unit/JWTUtil.java

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+package com.example.flower.unit;
+
+import com.alibaba.fastjson.JSONObject;
+import com.auth0.jwt.JWT;
+import io.jsonwebtoken.*;
+
+import java.util.Date;
+import java.util.UUID;
+
+public class JWTUtil {
+    private static long time = 1000*60*60*24;
+    private static String signature = "flower";
+    //创建token(示例)
+    public static String createToken(int id,int role){
+        JwtBuilder jwtBuilder = Jwts.builder();
+        String jwtToken = jwtBuilder
+                //header
+                .setHeaderParam("typ","JWT")
+                .setHeaderParam("alg","HS256")
+                //payload
+                .claim("id",id)
+                .claim("role",role)
+                .setSubject("admin-test")
+                .setExpiration(new Date(System.currentTimeMillis()+time))
+                .setId(UUID.randomUUID().toString())
+                //signature
+                .signWith(SignatureAlgorithm.HS256,signature)
+                .compact();
+        return jwtToken;
+    }
+
+    //检查token是否有效
+    public static boolean checkToken(String token){
+        if(token == null){
+            return false;
+        }
+        try {
+            Jwts.parser().setSigningKey(signature).parseClaimsJws(token);
+        }catch (ExpiredJwtException e){
+            return false;
+        }
+        return true;
+    }
+
+    //token认证失败
+    public static void checkTokenFailed(JSONObject jsonObject){
+        jsonObject.put("code",401 );
+        jsonObject.put("msg","token认证异常!" );
+        jsonObject.put("data",null );
+    }
+
+    //解析token,获取body信息
+    public static Claims getBodyByToken(String token){
+        Jws<Claims> claimsJws = Jwts.parser().setSigningKey(signature).parseClaimsJws(token);
+        return claimsJws.getBody();
+    }
+}