import java.beans.Encoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class Md5Util {
/**
* @param args
*/
public static void main(String[] args) {
//加盐
String psd = "123"+"abc";
encoder(psd);
}
/**给指定字符串按照md5算法去加密
* @param psd 需要加密的密码
*/
private static void encoder(String psd) {
try {
//1,指定加密算法类型
MessageDigest digest = MessageDigest.getInstance("MD5");
//2,将需要加密的字符串中转换成byte类型的数组,然后进行随机哈希过程
byte[] bs = digest.digest(psd.getBytes());
//System.out.println(bs.length);
//3,循环遍历bs,然后让其生成32位字符串,固定写法
//4,拼接字符串过程
StringBuffer stringBuffer = new StringBuffer();
for (byte b : bs) {
int i = b & 0xff;
//int类型的i需要转换成16机制字符
String hexString = Integer.toHexString(i);
//System.out.println(hexString);
if(hexString.length()<2){
hexString = "0"+hexString;
}
stringBuffer.append(hexString);
}
//5,打印测试
System.out.println(stringBuffer.toString());
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
}
}