java怎么和网络通信?Java提供了多种方式来实现网络通信，下面介绍两种常用的方式：
1. 使用Socket进行TCP通信：通过Java的Socket类和ServerSocket类，可以实现基于TCP协议的网络通信。其中，Socket类用于客户端与服务器建立连接，而ServerSocket类用于服务器监听客户端的连接请求。
客户端示例代码：
```java
import java.io.*;
import
java.net.*;
public class Client {
public static void main(String[] args)
{
try {
Socket socket = new Socket("服务器IP地址",
服务器端口号);
OutputStream os =
socket.getOutputStream();
PrintWriter writer = new
PrintWriter(os, true);
writer.println("Hello,
Server!");
InputStream is =
socket.getInputStream();
BufferedReader reader = new
BufferedReader(new InputStreamReader(is));
String response =
reader.readLine();
System.out.println("Server response: " +
response);
socket.close();
}
catch (IOException e) {
e.printStackTrace();
}
}
}
```
服务器端示例代码：
```java
import java.io.*;
import
java.net.*;
public class Server {
public static void main(String[] args)
{
try {
ServerSocket serverSocket = new
ServerSocket(服务器端口号);
System.out.println("Server listening on
port " + 服务器端口号);
Socket socket =
serverSocket.accept();
InputStream is =
socket.getInputStream();
BufferedReader reader = new
BufferedReader(new InputStreamReader(is));
String request =
reader.readLine();
System.out.println("Client request: " +
request);
OutputStream os =
socket.getOutputStream();
PrintWriter writer = new
PrintWriter(os, true);
writer.println("Hello,
Client!");
socket.close();
serverSocket.close();
} catch
(IOException e) {
e.printStackTrace();
}
}
}
```
2. 使用URLConnection进行HTTP通信：Java提供了URLConnection类来处理HTTP请求和响应。可以使用该类发送HTTP请求、接收服务器响应，并进行相应的处理。
示例代码：
```java
import java.io.*;
import java.net.*;
public class HttpClient {
public static void main(String[] args)
{
try {
URL url = new
URL("http://服务器地址/路径");
HttpURLConnection connection =
(HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
int responseCode =
connection.getResponseCode();
System.out.println("Response
Code: " + responseCode);
InputStream is =
connection.getInputStream();
BufferedReader reader = new
BufferedReader(new InputStreamReader(is));
String
line;
StringBuilder response = new
StringBuilder();
while ((line = reader.readLine()) != null)
{
response.append(line);
}
reader.close();
System.out.println("Response: " + response.toString());
connection.disconnect();
} catch (IOException e)
{
e.printStackTrace();
}
}
}
```
通过以上方式，你可以实现Java与网络之间的网络通信。
