一、自己寫一個工具類關(guān)閉

可變參數(shù)：...三個點，只能放在形參的最后一個位置。表示可以傳遞任意個參數(shù)，處理方式同數(shù)組。
程序

public static void close(Closeable... io) {
        for (Closeable temp : io) {
            if (temp != null) {
                try {
                    temp.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static <T extends Closeable> void closeAll(T... io) {

        for (Closeable temp : io) {
            if (temp != null) {
                try {
                    temp.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

<br />
二、1.7新增方法，try-with-resource
程序

public static void read(String srcPath) {

        File src = new File(srcPath);
        try (
                ObjectInputStream ois = new ObjectInputStream(new BufferedInputStream(new FileInputStream(src)));
            ) 
            {
                Object o1 = ois.readObject();
                Object o2 = ois.readObject();
                if (o1 instanceof Employee) {
                    Employee e1 = (Employee) o1;
                    System.out.println(e1.getSalary());
                    System.out.println(e1.getName());
                }
                if (o2 instanceof Employee) {
                    Employee e2 = (Employee) o2;
                    System.out.println(e2.getSalary());
                }
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
        }

    }