md5encode.java

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package util;
import java.security.MessageDigest;

public class md5Encode {
    public static String MD5Encode(String sourceString) {
        String resultString = null;
        try {        
            resultString=new String(sourceString); 
            MessageDigest md = MessageDigest.getInstance("MD5"); 
            resultString=byte2hexString(md.digest(resultString.getBytes()));
        }catch (Exception ex) {     }  
        return resultString;  
    }   
    public static final String byte2hexString(byte[] bytes) { 
        StringBuffer buf = new StringBuffer(bytes.length * 2);
        for (int i = 0; i < bytes.length; i++) { 
            if ( ((int) bytes[i] & 0xff) < 0x10) {
                buf.append("0");     
            }      
            buf.append(Long.toString((int) bytes[i] & 0xff, 16));   
        }   
        return buf.toString();
    }
}