From 7660a1a9ad3e5603cf214bf5a81d960923a1d6bc Mon Sep 17 00:00:00 2001
From: bunny <1319900154@qq.com>
Date: Mon, 11 Mar 2024 21:08:36 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E5=B7=A5=E5=85=B7=E7=B1=BB=E5=AE=8C?=
 =?UTF-8?q?=E6=88=90?=
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---
 .../java/com/sky/common/utils/JwtUtil.java    | 52 +++++++++++++++++++
 .../main/java/com/sky/common/utils/MD5.java   | 35 +++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 sky-common/src/main/java/com/sky/common/utils/JwtUtil.java
 create mode 100644 sky-common/src/main/java/com/sky/common/utils/MD5.java

diff --git a/sky-common/src/main/java/com/sky/common/utils/JwtUtil.java b/sky-common/src/main/java/com/sky/common/utils/JwtUtil.java
new file mode 100644
index 0000000..dcb5f5e
--- /dev/null
+++ b/sky-common/src/main/java/com/sky/common/utils/JwtUtil.java
@@ -0,0 +1,52 @@
+package com.sky.common.utils;
+
+import io.jsonwebtoken.Claims;
+import io.jsonwebtoken.JwtBuilder;
+import io.jsonwebtoken.Jwts;
+import io.jsonwebtoken.SignatureAlgorithm;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Date;
+import java.util.Map;
+
+public class JwtUtil {
+    /**
+     * 生成JWT
+     * 使用Hs256算法, 私匙使用固定秘钥
+     * @param secretKey jwt秘钥
+     * @param ttlMillis jwt过期时间(毫秒)
+     * @param claims 设置的信息
+     * @return 加密后JWT
+     */
+    public static String createJWT(String secretKey, long ttlMillis, Map<String, Object> claims) {
+        // 指定签名的时候使用的签名算法，也就是header那部分
+        SignatureAlgorithm signatureAlgorithm = SignatureAlgorithm.HS256;
+        // 生成JWT的时间
+        long expMillis = System.currentTimeMillis() + ttlMillis;
+        Date date = new Date(expMillis);
+        JwtBuilder builder = Jwts.builder()
+                // 如果有私有声明，一定要先设置这个自己创建的私有的声明，这个是给builder的claim赋值，一旦写在标准的声明赋值之后，就是覆盖了那些标准的声明的
+                .setClaims(claims)
+                // 设置签名使用的签名算法和签名使用的秘钥
+                .signWith(signatureAlgorithm, secretKey.getBytes(StandardCharsets.UTF_8))
+                // 设置过期时间
+                .setExpiration(date);
+
+        return builder.compact();
+    }
+
+    /**
+     * Token解密
+     * @param secretKey jwt秘钥
+     * @param token token
+     * @return 解密后数据
+     */
+    public static Claims parseJWT(String secretKey, String token) {
+        // 得到DefaultJwtParser
+        return Jwts.parser()
+                // 设置签名的秘钥
+                .setSigningKey(secretKey.getBytes(StandardCharsets.UTF_8))
+                // 设置需要解析的jwt
+                .parseClaimsJwt(token).getBody();
+    }
+}
diff --git a/sky-common/src/main/java/com/sky/common/utils/MD5.java b/sky-common/src/main/java/com/sky/common/utils/MD5.java
new file mode 100644
index 0000000..cf2e905
--- /dev/null
+++ b/sky-common/src/main/java/com/sky/common/utils/MD5.java
@@ -0,0 +1,35 @@
+package com.sky.common.utils;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+
+public final class MD5 {
+
+    public static String encrypt(String strSrc) {
+        try {
+            char hexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8',
+                    '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+            byte[] bytes = strSrc.getBytes();
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            md.update(bytes);
+            bytes = md.digest();
+            int j = bytes.length;
+            char[] chars = new char[j * 2];
+            int k = 0;
+            for (int i = 0; i < bytes.length; i++) {
+                byte b = bytes[i];
+                chars[k++] = hexChars[b >>> 4 & 0xf];
+                chars[k++] = hexChars[b & 0xf];
+            }
+            return new String(chars);
+        } catch (NoSuchAlgorithmException e) {
+            e.printStackTrace();
+            throw new RuntimeException("MD5加密出错！！+" + e);
+        }
+    }
+
+    public static void main(String[] args) {
+        System.out.println(MD5.encrypt("111111"));
+    }
+}