81,092
社区成员
发帖
与我相关
我的任务
分享一个有关SOCKET的故障
我写了一个简单的SOCKET例子，但在1.5jdk下编译的时候。说找不到MAIN函数。我换成1.6之后。它抛出以下错误：
java.net.BindException: Address already in use: JVM_Bind
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
at java.net.ServerSocket.bind(ServerSocket.java:319)
at java.net.ServerSocket.<init>(ServerSocket.java:185)
at java.net.ServerSocket.<init>(ServerSocket.java:97)
at person.hjl.webserver.serverStart(webserver.java:12)
at person.hjl.webserver.main(webserver.java:31)
有哪位高手帮我解决以下。
这个程序有两个源文件：一个是webserver,一个是Process，都是在包person.hjl下面
webserver：的源文件是：
package person.hjl;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class webserver {
public void serverStart(int port){
try {
ServerSocket serversocket=new ServerSocket(port);
while(true){
Socket socket=serversocket.accept();
new Process(socket).start();
}
}catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String args[]){
int port=80;
if(args.length==1)
{
port =Integer.parseInt(args[0]);
}
new webserver().serverStart(port);
}
}
Process的源文件是：
package person.hjl;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
public class Process extends Thread{
private Socket socket;
private InputStream in;
private PrintStream out;
public final static String MuLu="D://";
public Process(Socket socket) {
this.socket =socket;
try {
in=socket.getInputStream();
out=new PrintStream(socket.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
public void run()
{
String filename=parse(in);
sendFile(filename);
}
public String parse(InputStream in)
{ BufferedReader br=new BufferedReader(new InputStreamReader(in));
String filename =null;
try {
String httpMessage=br.readLine();
String[] content=httpMessage.split(" ");
if (content.length !=3)
{
sendErrorMessage(404,"Error");
return null;
}
System.out.println("ErrorCode: "+content[0]+"filename: "+content[1]+"httpversion: "+content[2]);
filename=content[1];
} catch (IOException e) {
e.printStackTrace();
}
return filename;
}
public void sendErrorMessage(int errorCode,String errorMessage)
{
out.println("http/1.0 "+errorCode+" "+errorMessage);
out.println("content-type: text/html");
out.println();
out.println("<html>");
out.println("<title> ErrorMessage");
out.println("</title>");
out.println("<body>");
out.println("<h1>errorCode: "+errorCode+", ErrorMessage: "+errorMessage+"</h1>");
out.println("</body>");
out.println("</html>");
}
public void sendFile(String filename)
{
File file=new File(Process.MuLu+filename);
if(!file.exists())
{
sendErrorMessage(404,"file not found");
return;
}
try {
InputStream in=new FileInputStream(file);
byte content[]=new byte[(int)file.length()];
in.read(content);
out.println("HTTP/1,0 200 queryfile");
out.println("content-length:"+content.length);
out.println();
out.write(content);
out.flush();
out.close();
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
java.net.BindException: Address already in use: JVM_Bind
at java.net.PlainSocketImpl.socketBind(Native Method)
at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
at java.net.ServerSocket.bind(ServerSocket.java:319)
at java.net.ServerSocket.<init>(ServerSocket.java:185)
at java.net.ServerSocket.<init>(ServerSocket.java:97)
at person.hjl.webserver.serverStart(webserver.java:12)
at person.hjl.webserver.main(webserver.java:31)
有哪位高手帮我解决以下。
这个程序有两个源文件：一个是webserver,一个是Process，都是在包person.hjl下面
webserver：的源文件是：
package person.hjl;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class webserver {
public void serverStart(int port){
try {
ServerSocket serversocket=new ServerSocket(port);
while(true){
Socket socket=serversocket.accept();
new Process(socket).start();
}
}catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String args[]){
int port=80;
if(args.length==1)
{
port =Integer.parseInt(args[0]);
}
new webserver().serverStart(port);
}
}
Process的源文件是：
package person.hjl;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.Socket;
public class Process extends Thread{
private Socket socket;
private InputStream in;
private PrintStream out;
public final static String MuLu="D://";
public Process(Socket socket) {
this.socket =socket;
try {
in=socket.getInputStream();
out=new PrintStream(socket.getOutputStream());
} catch (IOException e) {
e.printStackTrace();
}
}
public void run()
{
String filename=parse(in);
sendFile(filename);
}
public String parse(InputStream in)
{ BufferedReader br=new BufferedReader(new InputStreamReader(in));
String filename =null;
try {
String httpMessage=br.readLine();
String[] content=httpMessage.split(" ");
if (content.length !=3)
{
sendErrorMessage(404,"Error");
return null;
}
System.out.println("ErrorCode: "+content[0]+"filename: "+content[1]+"httpversion: "+content[2]);
filename=content[1];
} catch (IOException e) {
e.printStackTrace();
}
return filename;
}
public void sendErrorMessage(int errorCode,String errorMessage)
{
out.println("http/1.0 "+errorCode+" "+errorMessage);
out.println("content-type: text/html");
out.println();
out.println("<html>");
out.println("<title> ErrorMessage");
out.println("</title>");
out.println("<body>");
out.println("<h1>errorCode: "+errorCode+", ErrorMessage: "+errorMessage+"</h1>");
out.println("</body>");
out.println("</html>");
}
public void sendFile(String filename)
{
File file=new File(Process.MuLu+filename);
if(!file.exists())
{
sendErrorMessage(404,"file not found");
return;
}
try {
InputStream in=new FileInputStream(file);
byte content[]=new byte[(int)file.length()];
in.read(content);
out.println("HTTP/1,0 200 queryfile");
out.println("content-length:"+content.length);
out.println();
out.write(content);
out.flush();
out.close();
in.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
...全文
请发表友善的回复…
发表回复
betterhuch 2008-05-12
- 打赏
- 举报
没人顶啊，我自己来顶。
betterhuch 2008-05-10
- 打赏
- 举报
那不是一个死循环啊，是如果有人访问这个服务器，就会产生一个线程去处理。关于同步锁我不是很了解，谢谢你提醒我会去看看，可能会有所改进。
wwwwxxxx3389 2008-05-09
- 打赏
- 举报
你那个不是没有main方法!你那个是死循环了!while(true)这不就是无限循环吗?而你里面有是 new Thread 线程之间是轮换等待的!你这么做实际上就是无限的增加线程,无限的启动同一个socket!你再改改!还有一个问题顺便提醒你一下!你最好把你的线程加上一个同步锁!他们共用的是一个socket!自然也是共用一个stream!我以前也用这个思路做过!多线程共用一个stream是不安全的!之间的数据会乱!也就是说!ADBC!想传给第一个线程!由于没同步锁,A可能传到第一个线程!BCD就不知道被哪个线程接收过去了!
