输入一个字符串,然后可以进行md5加密 import java.security.*; import java.security.spec.*; public class MyTools { public final static String MD5(String s) { char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; try { by