用JAVA实现MD5算法
2006-08-27 23:48
330 查看
到老外的网站找到的!修改了一下!
import java.security.MessageDigest;
public class MD5
...{
private MessageDigest md5;
private static MD5 Instance;
/** *//**
* Constructs the MD5 object and sets the string whose MD5 is to be computed.
*
* @param inStr the <code>String</code> whose MD5 is to be computed
*/
public synchronized static MD5 getMD5Instance()
...{
if(Instance==null)
Instance=new MD5();
return Instance;
}
private MD5()
...{
try...{
this.md5 = MessageDigest.getInstance("MD5");
}
catch (Exception e)
...{
System.out.println(e.toString());
e.printStackTrace();
}
}
/** *//**
* Computes the MD5 fingerprint of a string.
*
* @r
bdc5
eturn the MD5 digest of the input <code>String</code>
*/
public String compute(String inStr)
...{
// convert input String to a char[]
// convert that char[] to byte[]
// get the md5 digest as byte[]
// bit-wise AND that byte[] with 0xff
// prepend "0" to the output StringBuffer to make sure that we don't end up with
// something like "e21ff" instead of "e201ff"
char[] charArray = inStr.toCharArray();
byte[] byteArray = new byte[charArray.length];
for (int i=0; i<charArray.length; i++)
byteArray[i] = (byte) charArray[i];
byte[] md5Bytes = this.md5.digest(byteArray);
StringBuffer hexValue = new StringBuffer();
for (int i=0; i<md5Bytes.length; i++)
...{
int val = ((int) md5Bytes[i] ) & 0xff;
if (val < 16) hexValue.append("0");
hexValue.append(Integer.toHexString(val));
}
return hexValue.toString();
}
public static void main(String[] args)
...{
System.out.println(MD5.getMD5Instance().compute("").toUpperCase());
}
}
相关文章推荐
- Java中MD5算法的实现
- 一个简单的md5算法java实现
- java 的md5算法实现
- MD5算法了解(JAVA实现)
- Java实现MD5算法(原来有这么强大的功能)
- MD5算法JAVA的实现
- Java 实现Md5算法
- Java之MD5算法实现
- java简单实现MD5算法
- MD5算法 java 实现
- java中md5算法的实现
- 用JAVA实现MD5算法
- MD5算法的JAVA实现
- java实现MD5算法
- SimpleMD5Example (OpenLdap加密MD5算法的JAVA实现)
- password技术应用设计实践-安全信息传输系统(SITS)(用Java实现DES、RSA、MD5算法)
- MD5算法java实现
- MD5算法了解(JAVA实现)
- java实现MD5算法加密
- java实现HMAC-MD5算法