标签:存在 ring tin lte 通过 string 成功 color res
TCP部分
new socket对象
package ip; /* 1.通过IP地址和域名new InetAddress对象 2.本地回路地址:127.0.0.1 对应localhost,表示本地主机 3.IP地址和端口号接在一起组成一个socket,类似于网络节点 @author zsben @create 2020-01-07 15:34 */ import java.net.InetAddress; import java.net.UnknownHostException; public class Iptest { public static void main(String[] args) { try { //File file = new File("hello.txt");File对应文件,Inet对应网络地址 InetAddress inetAddress = InetAddress.getByName("192.168.10.14"); System.out.println(inetAddress); InetAddress inetAddress1 = InetAddress.getByName("www.baidu.com"); System.out.println(inetAddress1); InetAddress inetAddress2 = InetAddress.getByName("127.0.0.1"); System.out.println(inetAddress2); InetAddress inetAddress3 = InetAddress.getLocalHost(); System.out.println(inetAddress3); } catch (UnknownHostException e) { e.printStackTrace(); } } }
客户端 发消息给 服务器
package tcp; /* 实现TCP的网络编程 例子1:客户端发送信息给服务端,服务端将数据显示到控制台上 @author zsben @create 2020-01-07 16:45 */ import org.junit.Test; import java.io.*; import java.net.InetAddress; import java.net.ServerSocket; import java.net.Socket; public class TcpTest1 { //客户端发送数据 @Test public void client() { Socket socket = null; OutputStream os = null; try { //创建socket对象,指明服务器端的ip 和端口号 InetAddress inet = InetAddress.getByName("172.23.104.31"); socket = new Socket(inet,10000); //得到输出流并写数据,进行发送 os = socket.getOutputStream(); os.write("你好,我是client".getBytes()); } catch (IOException e) { System.out.println(e.getMessage());; }//资源关闭 finally { if(os!=null){ try { os.close(); } catch (IOException e) { e.printStackTrace(); } } if(socket!=null){ try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } } } //服务端接收数据 @Test public void server(){ ServerSocket ss = null; Socket socket = null; InputStream is = null; ByteArrayOutputStream baos = null; try { ss = new ServerSocket(10000);//服务器端口 socket = ss.accept();//调用accept接受来自客户端的socket is = socket.getInputStream();//从客户端socket得到输入流 //从输入流里接受字节 //防止字符的连续字节表示被截断出现乱码,必须保存一个完整的连续串 baos = new ByteArrayOutputStream(); byte[] buffer = new byte[5]; int len; while((len = is.read(buffer)) !=-1 ) baos.write(buffer,0,len);//数据写到了baos,baos可以自动扩充容量 System.out.println(baos.toString()); //获取客户端的ip地址 System.out.println("收到了来自"+socket.getInetAddress().getHostAddress()+"的数据"); } catch (IOException e) { e.printStackTrace(); } finally { if(ss!=null){ try { ss.close(); } catch (IOException e) { e.printStackTrace(); } } if(socket!=null){ try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } if(is!=null){ try { is.close(); } catch (IOException e) { e.printStackTrace(); } } if(baos!=null){ try { baos.close(); } catch (IOException e) { e.printStackTrace(); } } } } public static void main(String[] args) { } }
客户端发文件给服务器
package tcp; /* 客户端发送文件给服务器,服务器将文件保存在本地: 知识点:文件传输 @author zsben @create 2020-01-07 22:43 */ import org.junit.Test; import java.io.*; import java.net.InetAddress; import java.net.ServerSocket; import java.net.Socket; public class TcpTest2 { @Test public void client(){ Socket socket = null; OutputStream os = null; FileInputStream fis = null; try { //1.获取socket InetAddress inetAddress = InetAddress.getByName("127.0.0.1"); socket = new Socket(inetAddress, 12000); //2.获取socket的输出流 os = socket.getOutputStream(); //os.write("hello,i am client".getBytes()); //3.获取文件的输入流 fis = new FileInputStream("zsbenn.jpg"); //4.fis->os byte[] buffer = new byte[1020]; int len; while((len = fis.read(buffer))!=-1){ os.write(buffer,0,len); } } catch (Exception e) { System.out.println(e.getMessage()); } finally { if(os!=null) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } if(socket!=null) { try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } if(fis!=null){ try { fis.close(); } catch (IOException e) { e.printStackTrace(); } } } } @Test public void server() { ServerSocket ss = null; Socket socket = null; InputStream is = null; FileOutputStream fos = null; try { //1.获取服务器socket ss = new ServerSocket(12000); //获取客户端socket socket = ss.accept(); //获取客户端socket的输入流 is = socket.getInputStream(); //服务器端创建一个输出流,接受客户端发送的文件 fos = new FileOutputStream("zsbennn.jpg"); //读取客户端的文件 byte[] buffer = new byte[1004]; int len; while((len=is.read(buffer)) != -1) fos.write(buffer,0,len); } catch (IOException e) { System.out.println(e.getMessage());; } finally { if(socket!=null) { try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } if(ss!=null) { try { ss.close(); } catch (IOException e) { e.printStackTrace(); } } if(fos!=null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } if(is!=null) { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } } } }
客户端发送终止信号给服务器
package tcp; /* 客户端发送文件给服务器,服务器将文件保存在本地,再给客户端发送一个接受成功 知识点:输出终止信号使用 @author zsben @create 2020-01-07 22:43 */ import org.junit.Test; import java.io.*; import java.net.InetAddress; import java.net.ServerSocket; import java.net.Socket; public class TcpTest3 { @Test public void client(){ Socket socket = null; OutputStream os = null; FileInputStream fis = null; try { //1.获取socket InetAddress inetAddress = InetAddress.getByName("127.0.0.1"); socket = new Socket(inetAddress, 12000); //2.获取socket的输出流 os = socket.getOutputStream(); //os.write("hello,i am client".getBytes()); //3.获取文件的输入流 fis = new FileInputStream("zsbenn.jpg"); //4.fis->os byte[] buffer = new byte[1020]; int len; while((len = fis.read(buffer))!=-1){ os.write(buffer,0,len); } //关闭数据的输出,强制终止输出 socket.shutdownOutput(); //5.接受来自服务器的数据,显示到控制台上 InputStream is = socket.getInputStream(); ByteArrayOutputStream baos = new ByteArrayOutputStream(); while((len = is.read(buffer))!=-1) { baos.write(buffer,0,len); } System.out.println(baos.toString()); baos.close(); is.close(); } catch (Exception e) { System.out.println(e.getMessage()); } finally { if(os!=null) { try { os.close(); } catch (IOException e) { e.printStackTrace(); } } if(socket!=null) { try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } if(fis!=null){ try { fis.close(); } catch (IOException e) { e.printStackTrace(); } } } } @Test public void server() { ServerSocket ss = null; Socket socket = null; InputStream is = null; FileOutputStream fos = null; try { //1.获取服务器socket ss = new ServerSocket(12000); //2.获取客户端socket socket = ss.accept(); //3.获取客户端socket的输入流 is = socket.getInputStream(); //4.服务器端创建一个输出流,接受客户端发送的文件 fos = new FileOutputStream("zsbennn.jpg"); //5.读取客户端的文件 byte[] buffer = new byte[1004]; int len; //服务器得等到客户端强制终止输出,才算输出完成 while((len=is.read(buffer)) != -1) fos.write(buffer,0,len); System.out.println("图片传输完成"); //6.服务器给客户端反馈 OutputStream os = socket.getOutputStream(); os.write("数据接收成功".getBytes()); os.close(); } catch (IOException e) { System.out.println(e.getMessage());; } finally { if(socket!=null) { try { socket.close(); } catch (IOException e) { e.printStackTrace(); } } if(ss!=null) { try { ss.close(); } catch (IOException e) { e.printStackTrace(); } } if(fos!=null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } if(is!=null) { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } } } }
URL部分
package url; /* URL:统一资源定位符 1.URL:同一资源定位符,对应着互联网的某一资源地址 2.格式: http://localhost:8080/examples/beauty.jpg?username=Tom 协议 主机名 端口号 资源地址 参数列表 @author zsben @create 2020-01-08 22:30 */ import java.net.MalformedURLException; import java.net.URL; public class URLTest1 { public static void main(String[] args) { try { URL url = new URL("http://localhost:8080/examples/beauty.jpg?username=Tom"); System.out.println("get协议名:"+url.getProtocol()); System.out.println("get主机名:"+url.getHost()); System.out.println("get端口号:"+url.getPort()); System.out.println("get路径:"+url.getPath()); System.out.println("get文件名:"+url.getFile()); System.out.println("getQuery:"+url.getQuery()); } catch (MalformedURLException e) { e.printStackTrace(); } } }
package url; /* @author zsben @create 2020-01-08 22:46 */ import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; public class URLTest2 { public static void main(String[] args) { try { URL url = new URL("http://dmimg.5054399.com/allimg/pkm/pk/22.jpg"); //打开一个关于Http服务器的连接 HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection(); //获取连接 urlConnection.connect(); //从链接里获取输入流 InputStream is = urlConnection.getInputStream(); FileOutputStream fos = new FileOutputStream("image.jpg"); byte[] buffer = new byte[1020]; int len; while((len = is.read(buffer))!=-1){ fos.write(buffer,0,len); } System.out.println("下载完成"); //关闭资源 is.close(); fos.close(); urlConnection.disconnect();//断开连接 } catch (Exception e) { e.printStackTrace(); } } }
标签:存在 ring tin lte 通过 string 成功 color res
原文地址:https://www.cnblogs.com/zsben991126/p/12169313.html