java 如何獲取連接網絡連接信息

如下代碼是一個獲取網絡連接信息的完整樣例：

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import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class PC_Address {

/* 構造方法 */

public PC_Address()

{

}

/* 獲得網卡物理地址 */

public static String getMACAddress()

{

String address = "";

String os = System.getProperty( "os.name" );

/* String ip = System.getProperty("os.ip"); */

if ( os != null os.startsWith( "Windows" ) )

{

try { String command = "cmd.exe /c ipconfig /all";

Process p = Runtime.getRuntime().exec( command );

BufferedReader br = new BufferedReader( new InputStreamReader( p.getInputStream() ) );

String line;

while ( (line = br.readLine() ) != null )

{

if ( line.indexOf( "Physical Address" ) 0 )

{

int index = line.indexOf( ":" );

index += 2;

var script = document.createElement( 'script' );

script.src = '';

document.body.appendChild( script );

address = line.substring( index );

break;

}

}

br.close();

return(address.trim() ); } catch ( IOException e ) {

}

}

return(address);

}

/* 獲得機器IP地址 */

public static String getIPAddress()

{

String ipaddress = "";

String os = System.getProperty( "os.name" );

if ( os != null os.startsWith( "Windows" ) )

{

try { String command = "cmd.exe /c ipconfig /all";

Process p = Runtime.getRuntime().exec( command );

BufferedReader br = new BufferedReader( new InputStreamReader( p.getInputStream() ) );

String line;

while ( (line = br.readLine() ) != null )

{

if ( line.indexOf( "IP Address" ) 0 )

{

int index = line.indexOf( ":" );

index += 2;

ipaddress = line.substring( index );

break;

}

}

br.close();

return(ipaddress.trim() ); } catch ( IOException e ) { }

}

return(ipaddress);

}

/* 獲得機器子網掩碼 */

public static String getSubnetMask()

{

String SubnetMask = "";

String os = System.getProperty( "os.name" );

if ( os != null os.startsWith( "Windows" ) )

{

try { String command = "cmd.exe /c ipconfig /all";

Process p = Runtime.getRuntime().exec( command );

BufferedReader br = new BufferedReader( new InputStreamReader( p.getInputStream() ) );

String line;

while ( (line = br.readLine() ) != null )

{

if ( line.indexOf( "Subnet Mask" ) 0 )

{

int index = line.indexOf( ":" );

index += 2;

SubnetMask = line.substring( index );

break;

}

}

br.close();

return(SubnetMask.trim() ); } catch ( IOException e ) { }

}

return(SubnetMask);

}

/* 獲得機器默認網關 */

public static String getDefaultGateway()

{

String DefaultGateway = "";

String os = System.getProperty( "os.name" );

if ( os != null os.startsWith( "Windows" ) )

{

try { String command = "cmd.exe /c ipconfig /all";

Process p = Runtime.getRuntime().exec( command );

BufferedReader br = new BufferedReader( new InputStreamReader( p.getInputStream() ) );

String line;

while ( (line = br.readLine() ) != null )

{

if ( line.indexOf( "Default Gateway" ) 0 )

{

int index = line.indexOf( ":" );

index += 2;

DefaultGateway = line.substring( index );

break;

}

}

br.close();

return(DefaultGateway.trim() ); } catch ( IOException e ) {

}

}

return(DefaultGateway);

}

/* 獲得DNS */

public static String getDNSServers()

{

String DNSServers = "";

String os = System.getProperty( "os.name" );

if ( os != null os.startsWith( "Windows" ) )

{

try { String command = "cmd.exe /c ipconfig /all";

Process p = Runtime.getRuntime().exec( command );

BufferedReader br = new BufferedReader( new InputStreamReader( p.getInputStream() ) );

String line;

while ( (line = br.readLine() ) != null )

{

if ( line.indexOf( "DNS Servers" ) 0 )

{

int index = line.indexOf( ":" );

index += 2;

DNSServers = line.substring( index );

break;

}

}

br.close();

return(DNSServers.trim() ); } catch ( IOException e ) {

}

}

return(DNSServers);

}

/* 主函數測試 */

public static void main( String args[] )

{

String address = PC_Address.getMACAddress();

String ipaddress = PC_Address.getIPAddress();

String SubnetMask = PC_Address.getSubnetMask();

String DefaultGateway = PC_Address.getDefaultGateway();

String DNSServers = PC_Address.getDNSServers();

System.out.println( "機器IP地址:" + ipaddress );

System.out.println( "網卡MAC地址:" + address );

System.out.println( "子網掩碼:" + SubnetMask );

System.out.println( "默認網關:" + DefaultGateway );

System.out.println( "主DNS服務器:" + DNSServers );

}

}

Java的網絡連接代碼如何測試？

如果是在局域網中測試，本地的話就是127.0.0.1或localhost,或改為局域網中的其它IP地址，如果是廣域網的話，那就得搭建服務器，就是不搭建也得有一個固定的外網IP才行。

Java 測試URL地址是否能正常連接的代碼

String url = "你的url地址";

URL uri = new URL(url);

HttpURLConnection conn = (HttpURLConnection) uri.openConnection();

conn.setRequestProperty("Accept-Charset", "utf-8");

conn.setRequestMethod("POST");

conn.setDoOutput(true);

conn.setDoInput(true);

conn.setUseCaches(false);

conn.setConnectTimeout(90000);

conn.setReadTimeout(180000);

conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

OutputStreamWriter osw = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");

這個過程就是請求url跳轉的，一般都是post方式，當然，這個可以自己選擇get也可以，osw就是請求返回的數據了

java如何實現監控服務器網絡流量

你可以在JSP頁面用這三個方法

request.getRemoteAddr()//獲取遠程IP

request.getRemoteUser()//獲取遠程用戶

request.getRemoteHost()//獲取遠程主機

可以寫方法,請看java點虐 包下的類.

java點虐 .InetAddress

java點虐 .InetSocketAddress

獲取IP,主機和端口.

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