jdk原生的加密方式MessageDigest

绝地灬酷狼 2022-06-02 01:11 190阅读 0赞

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;
    }