MD5加密工具类整理:
package com.gzcivil.utils; import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException; public class MD5Tool { public static String md5(String string) {
byte[] hash;
try {
hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException("Huh, MD5 should be supported?", e);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException("Huh, UTF-8 should be supported?", e);
} StringBuilder hex = new StringBuilder(hash.length * 2);
for (byte b : hash) {
if ((b & 0xFF) < 0x10)
hex.append("0");
hex.append(Integer.toHexString(b & 0xFF));
}
return hex.toString();
} public static String encrypt(String data) {
if (data == null)
data = "";
byte[] btRet = null;
try {
btRet = _encrypt(data.getBytes("utf-8"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if (btRet == null)
return null;
return BinStr.byte2str(btRet).toLowerCase();
} /**
* 加密MD5
*
* @param content
* 需要加密的内容
* @param password
* 加密密码
* @return
*/
private static byte[] _encrypt(byte[] btData) {
try {
// 获得MD5摘要算法的 MessageDigest 对象
MessageDigest mdInst = MessageDigest.getInstance("MD5");
// 使用指定的字节更新摘要
mdInst.update(btData);
// 获得密文
return mdInst.digest();
} catch (Exception e) {
e.printStackTrace();
return null;
}
} }