解密工具类

YijiaRestful/src/main/java/com/platform/yijia/utils/DESUtils.java

@@ -0,0 +1,149 @@
+package com.platform.yijia.utils;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
+public class DESUtils {
+	/**
+     * 随意定一个私钥（长度必须为24位）
+     */
+    public static final String SECRET_KEY = "ABCDEFGHIJKLMN1234567890";
+
+    /**
+     * 加密
+     *
+     * @param inStr     需要加密的内容
+     * @param secretKey 密钥
+     * @return 加密后的数据
+     */
+
+    public static String encrypt(String inStr, String secretKey) {
+
+        SecretKey deskey = new SecretKeySpec(secretKey.getBytes(), "DESede");
+
+        Cipher cipher;
+
+        String outStr = null;
+
+        try {
+
+            cipher = Cipher.getInstance("DESede");
+
+            cipher.init(Cipher.ENCRYPT_MODE, deskey);
+
+            outStr = byte2hex(cipher.doFinal(inStr.getBytes()));
+
+        } catch (Exception e) {
+            System.err.println("3DES加密异常"+ e.getMessage());
+        }
+        return outStr;
+
+    }
+
+    /**
+     * 解密
+     *
+     * @param inStr     需要解密的内容
+     * @param secretKey 密钥
+     * @return 解密后的数据
+     */
+
+    public static String decrypt(String inStr, String secretKey) {
+
+        SecretKey deskey = new SecretKeySpec(secretKey.getBytes(), "DESede");
+
+        Cipher cipher;
+        String outStr = null;
+
+        try {
+
+            cipher = Cipher.getInstance("DESede");
+
+            cipher.init(Cipher.DECRYPT_MODE, deskey);
+
+            outStr = new String(cipher.doFinal(hex2byte(inStr)));
+
+        } catch (Exception e) {
+            System.err.println("3DES解密异常"+e.getMessage());
+        }
+        return outStr;
+
+    }
+
+    /**
+     * 转化为16进制字符串方法
+     *
+     * @param digest 需要转换的字节组
+     * @return 转换后的字符串
+     */
+
+    private static String byte2hex(byte[] digest) {
+
+        StringBuffer hs = new StringBuffer();
+
+        String stmp = "";
+
+        for (int n = 0; n < digest.length; n++) {
+
+            stmp = Integer.toHexString(digest[n] & 0XFF);
+
+            if (stmp.length() == 1) {
+
+                hs.append("0" + stmp);
+
+            } else {
+
+                hs.append(stmp);
+
+            }
+
+        }
+
+        return hs.toString().toUpperCase();
+
+    }
+
+    /**
+     * 十六进转二进制
+     *
+     * @param hexStr 待转换16进制字符串
+     * @return 二进制字节组
+     */
+
+    public static byte[] hex2byte(String hexStr) {
+
+        if (hexStr == null)
+
+            return null;
+
+        hexStr = hexStr.trim();
+
+        int len = hexStr.length();
+
+        if (len == 0 || len % 2 == 1)
+
+            return null;
+
+        byte[] digest = new byte[len / 2];
+
+        try {
+
+            for (int i = 0; i < hexStr.length(); i += 2) {
+
+                digest[i / 2] = (byte) Integer.decode("0x" + hexStr.substring(i, i + 2)).intValue();
+
+            }
+            return digest;
+
+        } catch (Exception e) {
+
+            return null;
+
+        }
+
+    }
+
+
+
+}