高分求高手解决java程序设计问题： 将几个对象写入TXT文件之后的查找与输出

import java.io.FileInputStream

import java.io.FileOutputStream

import java.io.IOException

import java.io.ObjectInputStream

import java.io.ObjectOutputStream

import java.io.Serializable

public class ObjTest {

ObjectOutputStream oos

ObjectInputStream ois

String url = "f:/a.txt"//txt文件的目录位置,请自行修改

{

try {

oos =new ObjectOutputStream(new FileOutputStream(url))

ois = new ObjectInputStream(new FileInputStream(url))

} catch (Exception e) {

e.printStackTrace()

}

}

//关闭流

public void close(){

try {

ois.close()

} catch (IOException e) {

e.printStackTrace()

}finally{

try {

oos.close()

} catch (IOException e) {

e.printStackTrace()

}

}

}

//写入txt的方法

public void writeOut(Object obj){

try {

oos.writeObject(obj)

oos.flush()

} catch (Exception e) {

e.printStackTrace()

}

}

//读取txt的方法

public Object readIn(){

try {

return ois.readObject()

} catch (Exception e) {

e.printStackTrace()

}

return null

}

public static void main(String[] args) throws Exception {

ObjTest ot = new ObjTest()

ot.writeOut(new Person(1,"Tom",true))//写入5个对象

ot.writeOut(new Person(2,"Mary",false))

ot.writeOut(new Person(3,"Jack",true))

ot.writeOut(new Person(4,"Rose",false))

ot.writeOut(new Person(5,"Peter",true))

Person p

while((p = (Person)ot.readIn()) != null){

if(p.id == 3){ //查找条件

System.out.println(p)

return

}

}

System.out.println("no found person")

ot.close()

}

}

class Person implements Serializable{

int id

String name

boolean sex

public Person(){}

public Person(int id, String name, boolean sex) {

super()

this.id = id

this.name = name

this.sex = sex

}

@Override

public String toString() {

return id+ "\r\n" + name + "\r\n" + sex +"\r\n"

}

}

java.io.File folder = new java.io.Folder("D:\\我的数据晌毁")

if(!folder.exists()){

folder.mkdirs()///如果不宴拦备存在衡腊，创建目录

}

java.io.File file = new java.io.File(folder, "test1.txt")

java.io.FileOutputStream fou=new java.io.FileOutputStream(file)

fou.write("Test line 1\r\n")

fou.write("Test line 2\r\n")

fou.close()

大体如此，请参考

全实现,程序太长,发不上去,先实现基本的 图形用户界面

import java.awt.*

import java.awt.event.*

public class TestMenu {

public static void main (String[] args) {

new MenuFrame("新建"+" "+"文本文档"+".txt"+" "+"-"+" "+"记事本").launchFrame()

}

}

class MenuFrame extends Frame {

MenuBar mb = null

MenuFrame (String s) {

super (s)

}

public void launchFrame() {

Menu file = new Menu ("文件")

Menu edit = new Menu ("编辑")

Menu format = new Menu ("格式")

Menu help = new Menu ("帮助")

MenuItem newItem = new MenuItem ("新建")

newItem.addActionListener (new ActionListener () {

public void actionPerformed(ActionEvent e) {

final Frame ff = new Frame ("记事本")

ff.setMenuBar(mb)

ff.setBounds (300,300,400,200)

ff.setVisible (true)

ff. addWindowListener (new WindowAdapter () {

public void windowClosing(WindowEvent e) {

ff.setVisible (false)

}

} )

}

})

MenuItem saveItem = new MenuItem ("保存罩行")

MenuItem exitItem = new MenuItem ("退出")

MenuItem helpTitle = new MenuItem ("帮助主题")

MenuItem line = new MenuItem ("-")

MenuItem about = new MenuItem ("关于记戚稿事本")

MenuItem copy = new MenuItem ("粘贴")

MenuItem serach = new MenuItem ("查找高闷孝")

edit.add (copy)

edit.add (serach)

help.add (helpTitle)

help.add (line)

help.add (about)

exitItem.addActionListener (new ActionListener () {

public void actionPerformed(ActionEvent e) {

System.exit (0)

}

} )

file.add (newItem)

file.add (saveItem)

file.add (exitItem)

mb = new MenuBar()

mb.add (file)

mb.add (edit)

mb.add (format)

mb.add (help)

addWindowListener (new WindowAdapter () {

public void windowClosing(WindowEvent e) {

System.exit (0)

}

} )

setLayout (new FlowLayout())

setMenuBar (mb)

setBounds (300,300,400,200)

setVisible (true)

}

}

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