javatcp返回的简单介绍

博主:adminadmin 2023-01-12 02:06:06 902

本篇文章给大家谈谈javatcp返回,以及对应的知识点,希望对各位有所帮助,不要忘了收藏本站喔。

本文目录一览:

用java程序向linux,windows 发送命令查询 udp 和tcp 类型的端口是否可用 并返回有效结果

可以在java中使用HttpClient来发起一个请求到windows服务器。

1. GET 方式传递参数

//先将参数放入List,再对参数进行URL编码

ListBasicNameValuePair params = new LinkedListBasicNameValuePair();

params.add(new BasicNameValuePair("param1", "数据")); //增加参数1

params.add(new BasicNameValuePair("param2", "value2"));//增加参数2

String param = URLEncodedUtils.format(params, "UTF-8");//对参数编码

String baseUrl = "服务器接口完整URL";

HttpGet getMethod = new HttpGet(baseUrl + "?" + param);//将URL与参数拼接

HttpClient httpClient = new DefaultHttpClient();

try {

HttpResponse response = httpClient.execute(getMethod); //发起GET请求

Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //获取响应码

Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8"));//获取服务器响应内容

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

2. POST方式 方式传递参数

//和GET方式一样,先将参数放入List

params = new LinkedListBasicNameValuePair();

params.add(new BasicNameValuePair("param1", "Post方法"));//增加参数1

params.add(new BasicNameValuePair("param2", "第二个参数"));//增加参数2

try {

HttpPost postMethod = new HttpPost(baseUrl);//创建一个post请求

postMethod.setEntity(new UrlEncodedFormEntity(params, "utf-8")); //将参数填入POST Entity中

HttpResponse response = httpClient.execute(postMethod); //执行POST方法

Log.i(TAG, "resCode = " + response.getStatusLine().getStatusCode()); //获取响应码

Log.i(TAG, "result = " + EntityUtils.toString(response.getEntity(), "utf-8")); //获取响应内容

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

java如何通过tcp向指定的IP发送指令并获得返回的包?

以下是一个展示java使用tcp通讯的简单例子,包括服务器和客户端代码:

/**

*TCPServer

*/

import java.io.*;

import java.net.*;

class TCPServer{

public static void main(String[] args)throws IOException{

ServerSocket listen = new ServerSocket(5050);

Socket server = listen.accept();

InputStream in = server.getInputStream();

OutputStream out = server.getOutputStream();

char c = (char)in.read();

System.out.println("收到:" + c);

out.write('s');

out.close();

in.close();

server.close();

listen.close();

}

}

/**

*TCPClient

*/

import java.io.*;

import java.net.*;

class TCPClient{

public static void main(String[] args)throws IOException{

Socket client = new Socket("127.0.0.1" , 5050);

InputStream in = client.getInputStream();

OutputStream out = client.getOutputStream();

out.write('c');

char c = (char)in.read();

System.out.println("收到:" + c);

out.close();

in.close();

client.close();

}

}

java方面的, 应用TCP编程, 完成一个多线程版的服务端 ,当Client访问时 ,返回当前访问的时间。。求编码

这个需要多线程么?把服务端搞成常驻内存的就好了吧。比如while。下面是我刚给你写的测试代码,仅供参考:

客户端:

static Socket server;

public static void main(String[] args) throws Exception {

InetAddress address = InetAddress.getByName("134.132.207.228");

server = new Socket(address, 4567);

PrintWriter out = new PrintWriter(server.getOutputStream());

String str = "发送内容";

System.out.println("client send:"+str);

out.println(str);

out.flush();

BufferedReader wt = new BufferedReader(new InputStreamReader(server.getInputStream()));

str = wt.readLine();

System.out.println("client receive:"+str);

wt.close();

out.close();

server.close();

}

服务端:

static SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

public static void main(String[] args) throws IOException {

ServerSocket server = new ServerSocket(4567);

while(true){

Socket client = server.accept();

BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));

String str = in.readLine();

System.out.println("server receive:"+str);

PrintWriter out = new PrintWriter(client.getOutputStream());

str = "来自服务器:"+getCurrentDateTimeStr();

out.println(str);

out.flush();

System.out.println(str);

out.close();

in.close();

client.close();

}

}

public static String getCurrentDateTimeStr(){

Calendar cal = Calendar.getInstance();

return getFormatedTime(cal.getTime());

}

public static String getFormatedTime(Date date) {

return dateFormat.format(date);

}

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