类对象的读写文件

package com.coretech.defobject;


import java.io.EOFException;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class ObjRwTool {
    public Object readObj(String filename ) {
        ObjectInputStream inputStream = null;
        Object obj = null;
        try {
            inputStream = new ObjectInputStream(new FileInputStream(filename));
            obj = inputStream.readObject();        
        } catch (EOFException ex) { // 在读取到文件结束时触发此异常
            System.out.println("End of file reached.");
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            // Close the ObjectInputStream
            try {
                if (inputStream != null) {
                    inputStream.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return obj;
    }
    
    public Boolean writeObject(String filename,Object obj) {

        ObjectOutputStream outputStream = null;
        Boolean bRet = false;
        try {
            outputStream = new ObjectOutputStream(new FileOutputStream(filename));            
            outputStream.writeObject(obj);
            bRet= true;
        } catch (FileNotFoundException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        } finally {
            // Close the ObjectOutputStream
            try {
                if (outputStream != null) {
                    outputStream.flush();
                    outputStream.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
        return bRet;
    }
}