用XML读取文件Java

Question

我有一个服务器，它接受一个WSDL请求并逐行回发WSDL的XML。我知道请求正在被正确接收和处理，因为当服务器写入服务器套接字时，服务器会将XML输出到控制台。我现在的问题是我的客户端应用程序应该在xml中读取，然后使用xml打印方法签名。我将使用DOM/DocumentBuilder从WSDL获取方法签名的各个部分，但我需要首先将读入的行放入一个文件中。我怎样才能做到这一点？目前，我试图做这种方式：

 //request WSDL from server 
     System.out.println("Client requesting \"MathServices?wsdl\"..."); 
     socketWriter.write("GET MathServices?wsdl"); 
     socketWriter.close(); 

     //read XML response into file  
     try { 
      File wsdlXML = new File("MathServices.xml"); 
      FileOutputStream wsdlXmlWriter = new FileOutputStream(wsdlXML); 

      String xmlLine; 
      while((xmlLine = socketReader.readLine()) != null){ 
       wsdlXmlWriter.write(xmlLine.getBytes()); 
      } 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 

，但我得到这个错误：

客户端请求 “MathServices WSDL？” ...... java.net.SocketException异常：插座是java关闭 .net.SocketInputStream.socketRead0（本机方法） 在java.net.SocketInputStream.read（SocketInputStream.java:129） 在sun.nio.cs.StreamDecoder.readBytes（StreamDecoder.java:264） 在sun.nio。 cs.StreamDecoder.implRead（StreamDecoder.java:306） at sun.nio.cs.StreamDecoder.read（StreamDecoder.java:158）在java.io.BufferedReader.readLine（BufferedReader.java:299） at（java.io.BufferedReader.java:136）上的java.io.InputStreamReader.read（InputStreamReader.java:167） （BufferedReader.java:136） java.io.BufferedReader.readLine（BufferedReader.java:362） 在client.Client.main（Client.java:50）

编辑：服务器代码

package server; 

import java.io.BufferedReader; 
import java.io.File; 
import java.io.FileNotFoundException; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.io.PrintWriter; 
import java.net.ServerSocket; 
import java.net.Socket; 
import java.net.SocketException; 
import java.util.Scanner; 

public class RequestHandler extends Thread { 

    Object block; 
    ServerSocket serverSocket; 
    BufferedReader socketReader; 
    PrintWriter socketWriter; 

    public RequestHandler(Object block, ServerSocket serverSocket){ 
     this.block = block; 
     this.serverSocket = serverSocket; 
    } 

    @Override 
    public void run() { 
     try{ 
      System.out.println("Waiting for connection..."); 
      Socket clientSocket = serverSocket.accept(); 
      System.out.println("Connection made."); 

      synchronized(block){ 
       System.out.print("Notifying server thread..."); 
       block.notify(); 
       System.out.println("...done"); 
       System.out.println(); 
      } 

      System.out.println("Setting up streams..."); 
      socketReader = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));    
      socketWriter = new PrintWriter(clientSocket.getOutputStream(), true); 
      System.out.println("Reading request"); 

      String input; 
      while((input = socketReader.readLine()) != "\n"){ 
       //System.out.println("Input: " +input); 

       if(input.startsWith("GET")){ 
        System.out.println("GET received."); 
        getResource(input); 
       } 
      } 

      socketWriter.close(); 
      socketReader.close(); 
      clientSocket.close(); 

      System.out.println("Streams closed."); 
     }catch(IOException e){ 
      System.out.println("IOException!"); 
      e.printStackTrace(); 
     } 
    } 

    public void getResource(String getRequest){ 
     String[] parts = getRequest.split("\\s+"); 
     String filename = parts[1].substring(1); 

     if(filename.equals("MathServices?wsdl")){ 
      filename = "MathServices.wsdl"; 
     } 
     System.out.println(filename); 
     File resource = new File(filename);    
     sendResponse(resource, 1); 
    } 

    public void sendResponse(File resource, int type){ 
     System.out.println(resource.getAbsolutePath()); 

     Scanner fileReader; 

     try { 
      fileReader = new Scanner(resource); 

      while(fileReader.hasNext()){ 
       String line = fileReader.nextLine(); 
       System.out.println(line); 
       socketWriter.println(line); 
      } 
      socketWriter.println("\n"); 
      System.out.println("end of response"); 
      socketWriter.close(); 

     } catch (FileNotFoundException e) { 
      System.out.println("File not found!"); 
      e.printStackTrace(); 
     } 
    } 

} 

Answer 1

它看起来像你关闭Socket从socketReader读取之前。在关闭Socket之前，您必须完全阅读该对象的结果。这是所有的代码？在关闭之前，您也可以尝试添加socketWriter.flush()。

编辑：

我注意到，您要发送GET请求到服务器，想必打算发出HTTP GET？如果是这样你的请求格式不正确。试试这个：

socketWriter.write("GET /MathServices?wsdl HTTP/1.1\r\n\r\n"); 

你可能会更好使用java.net.URLConnection或Apache的HttpClient这项任务。