IO流【Java对象的序列化和反序列化、File类在IO中的作用、装饰器模式构建IO流体系、Apache commons-io工具包的使用】(四)-全面详解（学习总结---从入门到深化）

public class Users implements Serializable {
    private int userid;
    private String username;
    private String userage;
    public Users(int userid, String username, String userage) {
        this.userid = userid;
        this.username = username;
        this.userage = userage;
    }
    public Users() { }
    public int getUserid() {
        return userid;
   }
    public void setUserid(int userid) {
        this.userid = userid;
   }
    public String getUsername() {
        return username;
   }
    public void setUsername(String username)
   {
        this.username = username;
   }
    public String getUserage() {
        return userage;
   }
    public void setUserage(String userage) {
        this.userage = userage;
   }
    @Override
    public String toString() {
 return "Users{" +
                "userid=" + userid +
                ", username='" + username + '\'' +
                ", userage='" + userage + '\'' +
                '}';
   }

public class TestObjectOutputStream {
    public static void main(String[] args) {
        //创建对象输出字节流与文件输出字节流对象
        try(ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("d:/data3"))){
            //创建Users对象
            Users users = new Users(1,"Oldlu","18");
            //将对象序列化到文件中
            oos.writeObject(users);
            //刷新
            oos.flush();
       }catch(IOException e){
            e.printStackTrace();
       }
   }
}

public class TestObjectInputStream {
    public static void main(String[] args) {
        //创建对象输入字节流与文件字节输入流对象
        try(ObjectInputStream ois = new ObjectInputStream(new FileInputStream("d:/data3"))) 
       {
            //将对象反序列化到内存中
            Users users = (Users) ois.readObject();
            System.out.println(users);
       }catch(Exception e){
            e.printStackTrace();
       }
   }
}

public class TestFile {
    public static void main(String[] args) {
        //创建字符缓冲流与文件字符输入流对象
        try(BufferedReader br =  new BufferedReader(new FileReader(new File("d:/sxt.txt")));
            //创建字符输出流对象
            PrintWriter pw = new PrintWriter(new File("d:/sxt8.txt"))){
            //操作流
            String temp = "";
            int i=1;
            while((temp = br.readLine()) != null){
                pw.println(i+","+temp);
                i++;
}
            pw.flush();
       }catch(IOException e){
            e.printStackTrace();
       }
   }
}

class Iphone {
 private String name;
 public Iphone(String name) {
     this.name = name;
}
 public void show() {
    System.out.println("我是" + name + ",可以在屏幕上显示");
  }
}
class TouyingPhone {
    public Iphone phone;
    public TouyingPhone(Iphone p) {
        this.phone = p;
 }
 // 功能更强的方法
 public void show() {
     phone.show();
     System.out.println("还可以投影，在墙壁上显示");
 }
}
public class TestDecoration {
 public static void main(String[] args) {
     Iphone phone = new Iphone("iphone30");
     phone.show();
     System.out.println("===============装饰后");
     TouyingPhone typhone = newTouyingPhone(phone);
     typhone.show();
 }
}

FileInputStream  fis = new FileInputStream(src);
BufferedInputStream  bis = new BufferedInputStream(fis);

import java.io.File;
import org.apache.commons.io.FileUtils;
public class TestUtils1 {
 public static void main(String[] args) throws Exception {
 String content = FileUtils.readFileToString(new File("d:/a.txt"), "gbk");
 System.out.println(content);
 }
}

import java.io.File;
import java.io.FileFilter;
import org.apache.commons.io.FileUtils;
public class TestFileUtilsDemo2 {
      public static void main(String[] args) throws Exception {
      FileUtils.copyDirectory(new File("d:/aaa"), new File("d:/bbb"), new FileFilter() {
 @Override
 public boolean accept(File pathname) {// 使用FileFilter过滤目录和以html结尾的文件
 if (pathname.isDirectory() || pathname.getName().endsWith("html")) {
      return true;
 } else {
      return false;
      }
     }
   });
  }
}

import java.io.*;
import org.apache.commons.io.IOUtils;
public class TestIOUtilsDemo {
    public static void main(String[] args) throws Exception {
        String content = IOUtils.toString(new FileInputStream("d:/sxt.txt"),"utf-8");
        System.out.println(content);
   }
}