用ObjectInputStream读二进文件

[suofeya]

不知道哪出问题了 总是报IOException异常 ObjectOutputStream使用writeInt（）方法正确写入数据的 但在ObjectInputStream中用readInt（）方法 不能读出来


import java.io.*;
public class two02 {
public static void input(){
ObjectInputStream in=null;
try{
in=new ObjectInputStream(new FileInputStream("01.dat"));
for(int i=0;i<3;i++){
int t=in.readInt();
System.out.println(t);
}
in.close();
}
catch(FileNotFoundException e){
System.out.println("file not found");
}
catch(IOException e){
System.out.println("wrong read");
}
}
public static void main(String args[]){
input();
}
}

[wufei151]

你先把错误异常输出来看一下。。

[suofeya]

不能打印出数字 而是进入IOException中，打印出wrong read

[tessykandy]

可能原因：writeInt的个数少于readInt的个数， 下面代码经测试没问题

import java.io.*;

public class TestIO {
	private final static int COUNT = 3;
	private final static String fileName = "01.dat";
	
	public static void input() {
		ObjectInputStream in = null;
		try {
			in = new ObjectInputStream(new FileInputStream(fileName));
			for (int i = 0; i < COUNT; i++) {
				int t = in.readInt();
				System.out.println(t);
			}
			in.close();
		} catch (FileNotFoundException e) {
			System.out.println("file not found");
		} catch (IOException e) {
			System.out.println("wrong read");
		}
	}
	
	public static void write() {
		ObjectOutputStream out = null;
		try {
			out = new ObjectOutputStream(new FileOutputStream(fileName));
			for (int i = 0; i < COUNT; i++) {
				out.writeInt(i);
			}
			out.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static void main(String args[]) {
		write();
		input();
	}
}

[faping_cao]

ObjectOutputStream writeInt 对应 ObjectInputStream readInt