import java.security.*;

public class shaTest {
	
	private static String dumpBytes(byte[] bytes) {
	    int i;
	    StringBuffer sb = new StringBuffer();
	    for (i = 0; i < bytes.length; i++) {
	      if (i % 32 == 0 && i != 0) {
	        sb.append("\n");
	      }
	      String s = Integer.toHexString(bytes[i]);
	      if (s.length() < 2) {
	        s = "0" + s;
	      }
	      if (s.length() > 2) {
	        s = s.substring(s.length() - 2);
	      }
	      sb.append(s);
	    }
	    return sb.toString();
	} 
	public static void main(String[] args) {
		
		String passwd = "netkiller";
	    MessageDigest md = null;
		try {
			md = MessageDigest.getInstance("SHA");
			md.update("chen".getBytes());
		} catch (NoSuchAlgorithmException e) {
			e.printStackTrace();
		}
		
	    System.out.println(dumpBytes(md.digest()));
	}

}

			

编译运行,输入字符串:8a89798cf0878e37bb6589ae1c36b9d8a036275b