标签:rgs 服务器 java writer generated generate oid host red
1 import java.io.*; 2 import java.net.InetAddress; 3 import java.net.Socket; 4 import java.net.UnknownHostException; 5 6 public class IOTest1 { 7 8 public static void main(String[] args) { 9 try { 10 //建立一个Scoket对象 11 Socket socket = new Socket(InetAddress.getByName("localhost"),12345); 12 PrintWriter out = new PrintWriter( 13 new BufferedWriter( 14 new OutputStreamWriter( 15 socket.getOutputStream()))); 16 17 out.println("hello world");//暂有有一个问题,不知道为何终端接收不到信息 18 BufferedReader in = new BufferedReader( 19 new InputStreamReader( 20 socket.getInputStream())); 21 String line = in.readLine(); 22 System.out.println(line); 23 in.close(); 24 out.close(); 25 socket.close(); 26 } catch (UnknownHostException e) { 27 // TODO Auto-generated catch block 28 e.printStackTrace(); 29 } catch (IOException e) { 30 // TODO Auto-generated catch block 31 e.printStackTrace(); 32 } 33 34 } 35 36 }
Socket对象是用来通信的,这个代码用来和服务器进行通信,给服务器传达信息。
附截图:
1 import java.io.*; 2 3 class Student implements Serializable 4 { 5 private String name ; 6 private int age; 7 private int grade; 8 private char sex; 9 //构建函数 10 public Student (String name,int age,int grade ,char sex) 11 { 12 this.name = name; 13 this.age = age; 14 this.grade = grade; 15 this.sex = sex; 16 } 17 public String toString() //重写函数 18 { 19 return this.name+" "+this.age+" "+this.grade+" "+this.sex; 20 } 21 } 22 public class IOTest2 { 23 24 public static void main(String[] args) { 25 try { 26 ObjectOutputStream out = new ObjectOutputStream( 27 new FileOutputStream("a.dat")); 28 Student s1 = new Student("wsy",18,6,‘男‘); 29 // System.out.println(s1); 30 out.writeObject(s1); 31 out.close(); 32 ObjectInputStream in = new ObjectInputStream( 33 new FileInputStream("a.dat")); 34 //因为read.readObject返回值类型是Object所以要给类型强制类型转换 35 //也要加一个catch捕捉ClassNotFoundException 36 Student s2 = (Student)in.readObject(); 37 System.out.println(s2); 38 in.close(); 39 } catch (FileNotFoundException e) { 40 // TODO Auto-generated catch block 41 e.printStackTrace(); 42 } catch (IOException e) { 43 // TODO Auto-generated catch block 44 e.printStackTrace(); 45 } catch (ClassNotFoundException e) { 46 // TODO Auto-generated catch block 47 e.printStackTrace(); 48 } 49 50 } 51 52 }
以上是我学习的可串化的类,需要去使用接口Serializable,然后就可以直接把一个类写入到一个文件,也可以直接从文件中读出那个类。
标签:rgs 服务器 java writer generated generate oid host red
原文地址:https://www.cnblogs.com/sucker/p/10604667.html