JAVA版MD5加密算法

package sf_md;

import javaio*;

import javasecurity*;

//import javautil*;

//import javasecurityinterfaces*;

public class MD_算法 {

private String inStr;

private MessageDigest mad;

public MD_算法(String inStr){

thisinStr=inStr;

try{

thismad=MessageDigestgetInstance(MD);

}

catch(Exception e){

Systemoutprintln(etoString());

eprintStackTrace();

}

}

public String compute(){

char[] charArray=thisinStrtoCharArray();

byte[] byteArray=new byte[charArraylength];

for(int i=;i<charArraylength;i++)

byteArray[i]=(byte)charArray[i];

byte[] mdBytes=thismaddigest(byteArray);

StringBuffer hexValue=new StringBuffer();

for(int i=;i<mdByteslength;i++){

int val=((int)mdBytes[i])&xff;

if(val<)

hexValueappend();

hexValueappend(IntegertoHexString(val));

}

return hexValuetoString();

}

public static void main(String[] args) {

String string=null;

try{

Systemoutprintln(请输入要加密的数据:);

BufferedReader br=new BufferedReader(new InputStreamReader(Systemin));

string=brreadLine();

}

catch(IOException e){

Systemoutprintln(e);

}

MD_算法 md =new MD_算法(string);

String postString =pute();

Systemoutprintln(加密后的数据:+postString);

}

}