欢迎使用CSDN-markdown编辑器

import java.security.*;
import java.util.logging.Level;
import java.util.logging.Logger;

public class Md5 {
public String md5(String str) {
if (str == null) {
return “”;
} else {
String value = null;
MessageDigest md5 = null;
try {
md5 = MessageDigest.getInstance(“MD5”);
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(Md5.class.getName()).log(Level.SEVERE, null,
ex);
}
sun.misc.BASE64Encoder baseEncoder = new sun.misc.BASE64Encoder();
try {
value = baseEncoder.encode(md5.digest(str.getBytes(“utf-8”)));
} catch (Exception ex) {
}
return value;
}

}public static void main(String[] args) {    Md5 md5=new Md5();    String string=md5.md5("123");    System.out.println(string);}

}