javasocket编程(javasocket通信)

淩亂°似流年 2023-09-25 08:43 134阅读 0赞

## Java网络编程－JavaSocket编程是什么呢？ ##

Socket传输模式

Sockets有两种主要的操作方式：面向连接的和无连接的。面向连接的sockets操作就像一部电话，他们必须建立一个连接和一人呼叫。所有的事情在到达时的顺序与它们出发时的顺序时一样。

无连接的sockets操作就像是一个邮件投递，没有什么保证，多个邮件可能在到达时的顺序与出发时的顺序不一样。

![javasocket编程][javasocket]

## Javasocket入门编程是什么？ ##

java原文件： import java。net。\*; import java。io。\*; public class ServerApp \{ public static void main(String args\[\]) \{ try \{ boolean flag=true; Socket clientSocket=null; String inputLine; int c; ServerSocket sSocket=new ServerSocket(8018); System。

## java中的socket编程是作什么的 ##

Socket,又称为套接字，Socket是计算机网络通信的基本的技术之一。如今大多数基于网络的软件，如浏览器，即时通讯工具甚至是P2P下载都是基于Socket实现的。本文会介绍一下基于TCP/IP的Socket编程，并且如何写一个客户端/服务器程序。

方法/步骤

Java中的socket编程 下面的部分将通过一些示例讲解一下如何使用socket编写客户端和服务器端的程序。 注意：在接下来的示例中，我将使用基于TCP/IP协议的socket编程，因为这个协议远远比UDP/IP使用的要广泛。并且所有的socket相关的类都位于java.net包下，所以在我们进行socket编程时需要引入这个包。

写入数据 接下来就是写入请求数据，我们从客户端的socket对象中得到OutputStream对象，然后写入数据后。很类似文件IO的处理代码。

打开服务器端的socket

读取数据 通过上面得到的socket对象获取InputStream对象，然后安装文件IO一样读取数据即可。这里我们将内容打印出来。

使用socket实现一个回声服务器，就是服务器会将客户端发送过来的数据传回给客户端。B/S方向的学Socket干什么，没有必要。

如果你需要自己做一个服务器，比如Tomcat,那么学习一下好了。

B/S Java方面，就去学 J2EE相关技术,JSP ,Servlet, EJB, Hibernate(iBatis),Struts/JSF,Web Services,XML，等等。

不要花精力到Socket上。socket是网络通讯编程常用的，建议掌握。没事了看看也好

再看看HTTP协议

自己做个简单的web服务器玩玩

对以后提高会有帮助相对于C++而言，JAVA在网络方面的优势还是还行的，建议学下。

![javasocket编程][javasocket 1]

## Java编程，利用Socket和ServerSocket编程。 ##

哎。。。加分都没有。。。

算了吧。。

服务器端：

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.ServerSocket;

import java.net.Socket;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextArea;

class wangluo1 extends JFrame implements ActionListener \{

JFrame frame = new JFrame();

JPanel panel1 = new JPanel();

JPanel panel2 = new JPanel();

JTextArea text1 = new JTextArea(30, 30);

//JTextArea text2 = new JTextArea(3, 25);

JButton sent = new JButton("转换");

InputStream in;

OutputStream out;

Socket client;

ServerSocket server;

String str;

String newStr = "";

public wangluo1() \{

add("South", panel2);

add(panel1);

panel1.add(text1);

panel2.setLayout(new FlowLayout());

//panel2.add(text2);

panel2.add(sent);

sent.addActionListener(this);

addWindowListener(new WindowAdapter() \{

public void windowClosing(WindowEvent e) \{

//try \{

//in.close();

//out.close();

//\} catch (IOException e1) \{

TODO Auto-generated catch block

//e1.printStackTrace();

//\}

System.exit(0);

\});

pack();

setVisible(true);

this.setTitle("服务器：");

try \{

server = new ServerSocket(10000);

client = server.accept();

in = client.getInputStream();

out = client.getOutputStream();

text1.append("已连接"+"\\n");

\} catch (IOException ioe) \{

while (true) \{

try \{

byte\[\] buf = new byte\[256\];

in.read(buf);

str = new String(buf);

text1.append("客户端说：" + "\\n" +str.trim());

text1.append("\\n");

\} catch (IOException e) \{

public static void main(String\[\] args) \{

new wangluo1();

public void actionPerformed(ActionEvent e) \{

try \{

for(int i=str.length()-1;i>=0;i--)\{

newStr = newStr + str.charAt(i);

byte\[\] buf = newStr.getBytes();

//text2.setText("");

out.write(buf);

out.flush();

//text1.append("服务器说："+"\\n" + s + "\\n");

\} catch (IOException ie) \{

客户端：

import java.awt.FlowLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.awt.event.WindowAdapter;

import java.awt.event.WindowEvent;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.net.Socket;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JTextArea;

public class wangluo2 extends JFrame implements ActionListener \{

JFrame frame = new JFrame();

Socket client;

OutputStream os;

InputStream is;

String s;

JTextArea text3 = new JTextArea(30, 30);

JTextArea text4 = new JTextArea(3, 25);

JPanel panel1 = new JPanel();

JPanel panel2 = new JPanel();

JButton clientsent = new JButton("发送");

public wangluo2() \{

add("South", panel2);

add(panel1);

panel1.add(text3);

panel2.setLayout(new FlowLayout());

panel2.add(text4);

panel2.add(clientsent);

pack();

setVisible(true);

this.setLocation(500, 0);

this.setTitle("客户端");

addWindowListener(new WindowAdapter() \{

public void windowClosing(WindowEvent e) \{

//try \{

//is.close();

//os.close();

//\} catch (IOException e1) \{

TODO Auto-generated catch block

//e1.printStackTrace();

//\}

System.exit(0);

\});

clientsent.addActionListener(this);

try \{

client = new Socket("127.0.0.1", 10000);

text3.append("已连接"+"\\n");

is = client.getInputStream();

os = client.getOutputStream();

\} catch (IOException ioe) \{

while (true) \{

try \{

byte\[\] buf = new byte\[256\];

is.read(buf);

String str = new String(buf);

text3.append("服务器说：" + "\\n" + str.trim());

text3.append("\\n");

\} catch (IOException e) \{

public static void main(String\[\] args) \{

new wangluo2();

public void actionPerformed(ActionEvent e) \{

try \{

String str = text4.getText();

byte\[\] buf = str.getBytes();

text4.setText("");

os.write(buf);

os.flush();

text3.append("客户端说："+"\\n" + str + "\\n");

\} catch (Exception ee) \{

\}你这个不就是TCP的例子吗？我给你找找。

//: c15:JabberServer.java

// Very simple server that just

// echoes whatever the client sends.

// \{RunByHand\}

import java.io.\*;

import java.net.\*;

public class JabberServer \{

// Choose a port outside of the range 1-1024:

public static final int PORT = 8080;

public static void main(String\[\] args)

throws IOException \{

ServerSocket s = new ServerSocket(PORT);

System.out.println("Started: " + s);

try \{

// Blocks until a connection occurs:

Socket socket = s.accept();

try \{

System.out.println(

"Connection accepted: "+ socket);

BufferedReader in =

new BufferedReader(

new InputStreamReader(

socket.getInputStream()));

// Output is automatically flushed

// by PrintWriter:

PrintWriter out =

new PrintWriter(

new BufferedWriter(

new OutputStreamWriter(

socket.getOutputStream())),true);

while (true) \{

String str = in.readLine();

if (str.equals("END")) break;

System.out.println("Echoing: " + str);

out.println(str);

// Always close the two sockets...

\} finally \{

System.out.println("closing...");

socket.close();

\} finally \{

s.close();

\} ///:~

//: c15:JabberClient.java

// Very simple client that just sends

// lines to the server and reads lines

// that the server sends.

// \{RunByHand\}

import java.net.\*;

import java.io.\*;

public class JabberClient \{

public static void main(String\[\] args)

throws IOException \{

// Passing null to getByName() produces the

// special "Local Loopback" IP address, for

// testing on one machine w/o a network:

InetAddress addr =

InetAddress.getByName(null);

// Alternatively, you can use

// the address or name:

// InetAddress addr =

//InetAddress.getByName("127.0.0.1");

// InetAddress addr =

//InetAddress.getByName("localhost");

System.out.println("addr = " + addr);

Socket socket =

new Socket(addr, JabberServer.PORT);

// Guard everything in a try-finally to make

// sure that the socket is closed:

try \{

System.out.println("socket = " + socket);

BufferedReader in =

new BufferedReader(

new InputStreamReader(

socket.getInputStream()));

// Output is automatically flushed

// by PrintWriter:

PrintWriter out =

new PrintWriter(

new BufferedWriter(

new OutputStreamWriter(

socket.getOutputStream())),true);

for(int i = 0; i < 10; i ++) \{

out.println("howdy " + i);

String str = in.readLine();

System.out.println(str);

out.println("END");

\} finally \{

System.out.println("closing...");

socket.close();

\} ///:~

[javasocket]: https://img2.baidu.com/it/u=570130319,3344582570&fm=26&fmt=auto
[javasocket 1]: https://img2.baidu.com/it/u=3975609262,4239680866&fm=26&fmt=auto