test.java

实现叫简单但是很经典的新闻发布管理系统

package news;

import java.security.MessageDigest;

public class test {
	public static void main(String[] a){
		String password="zwg";
		String output="";
		output=convert16(password);
		System.out.println(output);
	}
    public static String convert32(String s){ 
        char hexChars[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'}; 
        try { 
            byte[] bytes = s.getBytes(); 
            MessageDigest md = MessageDigest.getInstance("MD5"); 
            md.update(bytes); 
            bytes = md.digest();     
            int j = bytes.length; 
            char[] chars = new char[j * 2]; 
            int k = 0; 
            for (int i = 0; i < bytes.length; i++) { 
                byte b = bytes[i]; 
                chars[k++] = hexChars[b >>> 4 & 0xf]; 
                chars[k++] = hexChars[b & 0xf]; 
            } 
            return new String(chars);             
        } 
        catch (Exception e){ 
            return null; 
        } 
    } 
    public static String convert16(String s){
       String ns=convert32(s).substring(8,24);
       return ns;
    }   
}