Class Util

src/main/java/Util.java:8–175

import java.util.List;

public class Util {

    public static String getDefaultTestCmd(){
        String osName = System.getProperty("os.name");
        if (osName.startsWith("Mac")) {
            return "open /System/Applications/Calculator.app";
        }
        return "calc";
    }

    public static void writeObj2File(Object obj,String path) throws IOException {
        System.out.println("set obj to "+ path);
        FileOutputStream fileOut = new FileOutputStream(path);
        ObjectOutputStream out = new ObjectOutputStream(fileOut);
        out.writeObject(obj);
        out.close();
        fileOut.close();
    }

    public static Object readObj4File(String path) throws IOException, ClassNotFoundException {
        System.out.println("get obj for "+ path);
        FileInputStream fileInput = new FileInputStream(path);
        ObjectInputStream input = new ObjectInputStream(fileInput);
        return input.readObject();
    }

    public static void runGadgets(Object obj)throws Exception{
        byte[] ser = serialize(obj);
        deserialize(ser);
    }

    public static byte[] serialize(final Object obj) throws IOException {
        System.out.println("serialize obj:  "+ obj.getClass().getName());
        final ByteArrayOutputStream out = new ByteArrayOutputStream();
        final ObjectOutputStream objOut = new ObjectOutputStream(out);
        objOut.writeObject(obj);
        return out.toByteArray();
    }

    public static Object deserialize(byte[] ser) throws IOException, ClassNotFoundException {
        System.out.println("deserialize obj");
        final ByteArrayInputStream in = new ByteArrayInputStream(ser);
        final ObjectInputStream objIn = new ObjectInputStream(in);
        return objIn.readObject();
    }


    /**
     * 字节数组转16进制
     * @param bytes 需要转换的byte数组
     * @return  转换后的Hex字符串
     */
    public static String bytesToHex(byte[] bytes) {
        StringBuffer sb = new StringBuffer();
        for(int i = 0; i < bytes.length; i++) {
            String hex = Integer.toHexString(bytes[i] & 0xFF);
            if(hex.length() < 2){
                sb.append(0);