From 43b71bead83fc982b0af35542ebdcb4c8f344b99 Mon Sep 17 00:00:00 2001
From: xuwujing <1060589146@qq.com>
Date: Wed, 2 Jan 2019 14:35:23 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0AES=E5=8A=A0=E8=A7=A3?=
 =?UTF-8?q?=E5=AF=86=E5=B7=A5=E5=85=B7=E7=B1=BB?=
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---
 src/main/java/com/pancm/utils/AESUtil.java | 142 +++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 src/main/java/com/pancm/utils/AESUtil.java

diff --git a/src/main/java/com/pancm/utils/AESUtil.java b/src/main/java/com/pancm/utils/AESUtil.java
new file mode 100644
index 0000000..d653365
--- /dev/null
+++ b/src/main/java/com/pancm/utils/AESUtil.java
@@ -0,0 +1,142 @@
+package com.pancm.utils;
+
+
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+import javax.crypto.Cipher;
+import javax.crypto.KeyGenerator;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+
+import org.apache.commons.codec.binary.Base64;
+
+
+/**
+ * 
+* @Title: AESUtil
+* @Description: 
+* AES 加密工具类
+* @Version:1.0.0  
+* @author pancm
+* @date 2018年4月3日
+ */
+public class AESUtil {
+
+    private static final String KEY_ALGORITHM = "AES";
+    /** 秘钥 16位*/
+    private static final String PASSWORD = "e!@$%s^&*a)_m+s.";
+    private static final String DEFAULT_CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";//默认的加密算法
+
+    
+    
+    /**
+     * AES 加密操作
+     *
+     * @param content 待加密内容
+     * @return 返回Base64转码后的加密数据
+     */
+    public static String encrypt(String content) {
+    	return encrypt(content,PASSWORD);
+    }
+    
+    
+    /**
+     * AES 加密操作
+     *
+     * @param content 待加密内容
+     * @param password 加密密码
+     * @return 返回Base64转码后的加密数据
+     */
+    public static String encrypt(String content, String password) {
+        try {
+            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);// 创建密码器
+
+            byte[] byteContent = content.getBytes("utf-8");
+
+            cipher.init(Cipher.ENCRYPT_MODE, getSecretKey(password));// 初始化为加密模式的密码器
+
+            byte[] result = cipher.doFinal(byteContent);// 加密
+
+            return Base64.encodeBase64String(result);//通过Base64转码返回
+        } catch (Exception ex) {
+            Logger.getLogger(AESUtil.class.getName()).log(Level.SEVERE, null, ex);
+        }
+
+        return null;
+    }
+    
+    /**
+     * AES 解密操作
+     * @param content
+     * @return
+     */
+    public static String decrypt(String content) {
+    	return decrypt(content,PASSWORD);
+    }
+    
+    /**
+     * AES 解密操作
+     * @param content
+     * @param password
+     * @return
+     */
+    public static String decrypt(String content, String password) {
+
+        try {
+            //实例化
+            Cipher cipher = Cipher.getInstance(DEFAULT_CIPHER_ALGORITHM);
+
+            //使用密钥初始化，设置为解密模式
+            cipher.init(Cipher.DECRYPT_MODE, getSecretKey(password));
+
+            //执行操作
+            byte[] result = cipher.doFinal(Base64.decodeBase64(content));
+
+            return new String(result, "utf-8");
+        } catch (Exception ex) {
+            Logger.getLogger(AESUtil.class.getName()).log(Level.SEVERE, null, ex);
+        }
+        
+        return null;
+    }
+
+    /**
+     * 生成加密秘钥
+     *
+     * @return
+     */
+    private static SecretKeySpec getSecretKey(final String password) {
+        //返回生成指定算法密钥生成器的 KeyGenerator 对象
+        KeyGenerator kg = null;
+
+        try {
+            kg = KeyGenerator.getInstance(KEY_ALGORITHM);
+
+            //AES 要求密钥长度为 128
+            kg.init(128, new SecureRandom(password.getBytes()));
+
+            //生成一个密钥
+            SecretKey secretKey = kg.generateKey();
+
+            return new SecretKeySpec(secretKey.getEncoded(), KEY_ALGORITHM);// 转换为AES专用密钥
+        } catch (NoSuchAlgorithmException ex) {
+            Logger.getLogger(AESUtil.class.getName()).log(Level.SEVERE, null, ex);
+        }
+
+        return null;
+    }
+
+    public static void main(String[] args) {
+        String s = "1234";
+        String s1 = AESUtil.encrypt(s, "1234");
+        System.out.println("s1:" + s1);
+        
+        System.out.println("s2:"+AESUtil.decrypt(s1, "1234"));
+        
+
+    }
+
+}