package xmodule.test;
import java.security.MessageDigest;
public class JiaMIJieMIDemo {
public static void main(String[] args) {
// MD5 SHA-1 SHA-256
String signString = “123qwe”;
String type = “SHA-1”;
String result = getEncryptResult(signString, type);
System.out.println(“采用” + type + “加密之后的串为:” + result);
type = “MD5”;
result = getEncryptResult(signString, type);
System.out.println(“采用” + type + “加密之后的串为:” + result);
type = “SHA-256”;
result = getEncryptResult(signString, type);
System.out.println(“采用” + type + “加密之后的串为:” + result);
type = “SHA-384”;
result = getEncryptResult(signString, type);
System.out.println(“采用” + type + “加密之后的串为:” + result);
}
public static String getEncryptResult(String signString, String type) {
try {
// 返回实现指定摘要算法(type)的 MessageDigest 对象。
MessageDigest md = MessageDigest.getInstance(type);
byte[] srcStr = signString.getBytes();
// 通过使用 update 方法处理数据,使指定的 byte数组更新摘要
md.update(srcStr);
// 获得密文完成哈希计算,产生128 位的长整数
byte[] digest = md.digest();
String desStr = bytes2Hex(digest);
return desStr;
} catch (Exception e) {
System.out.println("签名失败!");
e.printStackTrace();
}
return null;
}
public static String bytes2Hex(byte[] bts) {
String des = "";
String tmp = null;
for (int i = 0; i < bts.length; i++) {
tmp = (Integer.toHexString(bts[i] & 0xFF));
if (tmp.length() == 1) {
des += "0";
}
des += tmp;
}
return des;
}
}