package md;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class SHAPWD {
public static void main(String[] args) {
getMD5("好天气好心情");
}
/**
* 安全散列算法 不可逆的加密算法
*
* @param strmd
* 加密字符串
* @return
*/
public static String getMD5(String strmd) {
MessageDigest sha;
String reStr = "";
try {
// sha = MessageDigest.getInstance("SHA");
sha = MessageDigest.getInstance("MD5");// SHA表示算法类型,也可以写为MD5加密类型;但是界面结果不同
sha.update(strmd.getBytes());
byte bt[] = sha.digest();
reStr = bytes2String(bt);
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
System.out.println("安全散列发加密结果:" + reStr);
return reStr;
}
private static String bytes2String(byte[] bt) {
String hash = "";
for (int i = 0; i < bt.length; i++) {
int temp;
if (bt[i] < 0) {
temp = 256 + bt[i];
} else {
temp = bt[i];
}
if (temp < 16) {
hash += "0";
}
hash += Integer.toString(temp, 16);
}
hash = hash.toUpperCase();
return hash;
}
}