2.0.0项目初始化

datax-common/datax-common-core/src/main/java/cn/datax/common/utils/MD5Util.java

+package cn.datax.common.utils;
+
+import sun.misc.BASE64Decoder;
+import sun.misc.BASE64Encoder;
+
+import javax.crypto.Cipher;
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.DESKeySpec;
+import javax.crypto.spec.IvParameterSpec;
+import java.security.Key;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.spec.AlgorithmParameterSpec;
+
+public class MD5Util {
+
+    //向量(同时拥有向量和密匙才能解密)，此向量必须是8byte，多少都报错
+    private final byte[] DESIV = new byte[] { 0x22, 0x54, 0x36, 110, 0x40, (byte) 0xac, (byte) 0xad, (byte) 0xdf };// 向量
+    private final String deSkey = "abcd自定义密钥";// 自定义密钥,个数不能太短，太短报错，过长，它默认只取前N位（N的具体值，大家另行查找资料）
+    private AlgorithmParameterSpec iv = null;// 加密算法的参数接口
+    private Key key = null;
+    private String charset = "UTF-8";
+
+    public static void main(String[] args) {
+        try {
+            String value = "1214826565321543682";
+            MD5Util mt= new MD5Util();
+            System.out.println("加密前的字符：" + value);
+            System.out.println("加密后的字符：" + mt.encode(value));
+            System.out.println("解密后的字符：" + mt.decode(mt.encode(value)));
+            System.out.println("字符串的MD5值："+ getMD5Value(value));
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * 构造函数
+     * @throws Exception
+     */
+    public MD5Util() throws Exception {
+        DESKeySpec keySpec = new DESKeySpec(deSkey.getBytes(this.charset));// 设置密钥参数
+        iv = new IvParameterSpec(DESIV);// 设置向量
+        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// 获得密钥工厂
+        key = keyFactory.generateSecret(keySpec);// 得到密钥对象
+    }
+
+    /**
+     * 加密
+     * @param data
+     * @return
+     * @throws Exception
+     */
+    public String encode(String data) throws Exception {
+        Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");// 得到加密对象Cipher
+        enCipher.init(Cipher.ENCRYPT_MODE, key, iv);// 设置工作模式为加密模式，给出密钥和向量
+        byte[] pasByte = enCipher.doFinal(data.getBytes(this.charset));
+        BASE64Encoder base64Encoder = new BASE64Encoder();
+        return base64Encoder.encode(pasByte);
+    }
+
+    /**
+     * 解密
+     * @param data
+     * @return
+     * @throws Exception
+     */
+    public String decode(String data) throws Exception {
+        Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
+        deCipher.init(Cipher.DECRYPT_MODE, key, iv);
+        BASE64Decoder base64Decoder = new BASE64Decoder();
+        //此处注意doFinal()的参数的位数必须是8的倍数，否则会报错（通过encode加密的字符串读出来都是8的倍数位，但写入文件再读出来，就可能因为读取的方式的问题，导致最后此处的doFinal()的参数的位数不是8的倍数）
+        //此处必须用base64Decoder，若用data。getBytes()则获取的字符串的byte数组的个数极可能不是8的倍数，而且不与上面的BASE64Encoder对应（即使解密不报错也不会得到正确结果）
+        byte[] pasByte = deCipher.doFinal(base64Decoder.decodeBuffer(data));
+        return new String(pasByte, this.charset);
+    }
+
+    /**
+     * 获取MD5的值，可用于对比校验
+     * @param sourceStr
+     * @return
+     */
+    private static String getMD5Value(String sourceStr) {
+        String result = "";
+        try {
+            MessageDigest md = MessageDigest.getInstance("MD5");
+            md.update(sourceStr.getBytes());
+            byte b[] = md.digest();
+            int i;
+            StringBuffer buf = new StringBuffer("");
+            for (int offset = 0; offset < b.length; offset++) {
+                i = b[offset];
+                if (i < 0)
+                    i += 256;
+                if (i < 16)
+                    buf.append("0");
+                buf.append(Integer.toHexString(i));
+            }
+            result = buf.toString();
+        } catch (NoSuchAlgorithmException e) {
+        }
+        return result;
+    }
+}