java io

读取

File file = new File("E:\\test.txt");

FileInputStream is =new FileInputStream(file);

InputStreamReader ir = new InputStreamReader(is);

BufferedReader br=new BufferedReader(ir);

System.out.println(br.readLine());

  br.close();

写流

       File file = new File("E:\\test.txt");

FileOutputStream os=new FileOutputStream(file);

OutputStreamWriter ow=new OutputStreamWriter(os);

BufferedWriter bw=new BufferedWriter(ow);

bw.write("我来了！");

bw.close();

 

 

对象的操作

import java.io.*;

 

 

// 注意：要被序列的类要继承Serializable接口

public class IoObject {

public static void main(String[] args) {

try {

File file = new File("E:\\Test.txt");

FileOutputStream os = new FileOutputStream(file);

ObjectOutputStream objectOutStream=new ObjectOutputStream(os);

objectOutStream.writeObject(new com.lzs.objecio.Test("sa"));

objectOutStream.flush();

objectOutStream.close();

FileInputStream is=new FileInputStream(file);

ObjectInputStream objectInStream =new ObjectInputStream(is);

Object o=objectInStream.readObject();

Test t=(Test)o;

System.out.println(t.getName());

} catch (Exception e) {

System.out.println("错误："+e.getMessage());

}

}

}