javaoop 第10章
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package bao1;import java.io.Serializable;public class Student implements Serializable{ private String name; private int age; public Student(String name, int age) {super();this.name = name;this.age = age;}public Student() {super();// TODO Auto-generated constructor stub}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;} }package bao1;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectOutputStream;import java.io.OutputStream;import java.util.ArrayList;import java.util.List; public class Test {/** * @param args * @throws IOException */public static void main(String[] args) throws IOException {// TODO Auto-generated method stubList<Student> list=new ArrayList<Student>();Student s1=new Student("王",20);Student s2=new Student("李",20);list.add(s1);list.add(s2);OutputStream os=new FileOutputStream("D:/save.bin");//java 提供类是 输出流 ObjectOutputStream ObjectOutputStream oos=new ObjectOutputStream(os);oos.writeObject(list);oos.close();os.close();System.out.println("serialize ok!");}}
import java.awt.BufferCapabilities.FlipContents;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;import java.io.Reader;import java.io.Writer;public class Frist {/** * @param args * @throws IOException */public static void main(String[] args) throws IOException {// TODO Auto-generated method stub//写文件File file=new File("E:\\S2226.txt");file.createNewFile(); //判定文件是否存在if (file.exists()) {System.out.println("exists");}File file2 = file.getAbsoluteFile() ;long length = file.length();long time = file.lastModified();System.out.println("文件大小"+length);System.out.println(time);System.out.println(file2); //读文件FileInputStream fis=new FileInputStream("E:/S2226.txt");byte[] bytes=new byte[1024];int data;while((data=fis.read(bytes))!=-1){ String temp=new String(bytes,0,data);System.out.println(temp);}fis.close();//2.Reader reader=new FileReader("E:/S2226.txt");BufferedReader br=new BufferedReader(reader);String line ;while((line= br.readLine())!=null){System.out.println(line);}br.close();reader.close();//写文件//1.String words="今天气很好啊";FileOutputStream fos=new FileOutputStream("E:/S2226.txt");byte[] bytess = words.getBytes(); fos.write(bytess); fos.close(); System.out.println("ok！"); //2.Writer writer=new FileWriter("E:\\S2226.txt");BufferedWriter bw=new BufferedWriter(writer);String word="你好";bw.write(word);bw.close();writer.close();package bao;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;public class Test {/** * @param args * @throws IOException */public static void main(String[] args) throws IOException {// TODO Auto-generated method stub InputStream is=new FileInputStream("C:/ming.png"); DataInputStream dis=new DataInputStream(is); //copy到目标路径 OutputStream os=new FileOutputStream("D:/ming.png"); DataOutputStream dos=new DataOutputStream(os); byte[] bytes=new byte[1024]; int data ; while((data= dis.read(bytes))!=-1){ dos.write(bytes, 0, data); } dos.close(); os.close(); dis.close(); is.close(); System.out.println("copy"); }}
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