錯誤使用電腦時我讀文件JSP頁面上遠程

我有一個要求，表示文件的路徑字符串的進入這個JSP客戶端：

<%@page contentType="text/html" pageEncoding="UTF-8"%> 
<!DOCTYPE html> 
<html> 
    <head> 
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
     <title>JSP Page</title> 
    </head> 
    <body> 
     <form action="action.jsp" method="post"> 
      Enter NameFile (Excel):<input type="text" name="filename"/><br/> 
      <input type="submit" value="Submit"/> 
      <input type="reset" value="Reset" /> 
     </form> 
    </body> 
</html>

現在，當我點擊「提交」，我有這個頁面JSP：

<%@page import="java.io.ByteArrayOutputStream"%> 
<%@page import="java.io.FileInputStream"%> 
<%@page import="java.io.File"%> 
<%@page contentType="text/plain" pageEncoding="UTF-8"%> 
<!DOCTYPE html> 
<html> 
    <head> 
     <meta http-equiv="Content-Type" content="text/plain; charset=UTF-8"> 
     <title>JSP Page Action</title> 
    </head> 
    <body> 

    <%-- start web service invocation --%><hr/> 
    <% 
    String filename = request.getParameter("filename"); 

    File file = new File (filename); 
    FileInputStream fis = new FileInputStream(file); 
    ByteArrayOutputStream bos = new ByteArrayOutputStream(); 
    byte[] buf = new byte[1024]; 
    for (int readNum; (readNum = fis.read(buf)) != -1;) { 
     bos.write(buf, 0, readNum); //no doubt here is 0 
    } 

    byte[] bi = bos.toByteArray(); 
    try { 
    ws.MyWS_Service service = new ws.MyWS_Service(); 
    ws.MyWS port = service.getMyWSPort(); 
    // TODO initialize WS operation arguments here 
    byte[] inputFile = bi; 
    // TODO process result here 
    java.lang.String result = port.mywsmethod(inputFile); 
    out.println(result); 
    } catch (Exception ex) { 
    // TODO handle custom exceptions here 
    } 
    %> 
    <%-- end web service invocation --%><hr/> 
    </body> 
</html>

現在，如果我插入

C:\prova.xls

爲什麼我得到這個錯誤

07-Oct-2014 08:55:10.194 SEVERE [http-apr-8080-exec-41] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [jsp] in context with path [/myWS_Client] threw exception [An exception occurred processing JSP page /action1.jsp at line 27 

25: 
26:  File file = new File (filename); 
27:  FileInputStream fis = new FileInputStream(filename); 
28:  ByteArrayOutputStream bos = new ByteArrayOutputStream(); 


Stacktrace:] with root cause 
java.io.FileNotFoundException: C:\prova.xls (Impossibile trovare il file specificato) 
    at java.io.FileInputStream.open(Native Method) 
    at java.io.FileInputStream.<init>(FileInputStream.java:146) 
    at java.io.FileInputStream.<init>(FileInputStream.java:101) 
    at org.apache.jsp.action1_005f1_jsp._jspService(action1_005f1_jsp.java:96) 
    at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:725) 
    at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) 
    at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391) 
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:335) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:725) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:534) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1081) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:658) 
    at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277) 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381) 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:744)

：

在PC遙控器，我得到這個錯誤？我錯了什麼？我試圖用「//」，「\」，「\」和「/」來寫這條路徑，但我總是得到相同的錯誤。

來源

2014-10-07 Musich87

JSP是一個服務器端進程。您在HTML/Javascript中輸入的文件名和路徑可能不存在於服務器上。

考慮使用文件上傳將文件上載到JSP可以對其執行操作的服務器。

還要考慮使用servlet技術，並且在JSP中使用代碼是不被接受的。

來源

2014-10-07 07:23:22

好的...考慮我想上傳一個文件，將其轉換爲數組字節併發送到我的Web服務...我該怎麼做？ – Musich87 2014-10-07 07:27:30

看到這個http://docs.oracle.com/javaee/6/tutorial/doc/glraq.html – 2014-10-07 07:30:58

我看到這個文檔...但我不想上傳文件在服務器上的目的地...我想加載一個文件，只轉換和發送數組字節 – Musich87 2014-10-07 07:37:25

錯誤使用電腦時我讀文件JSP頁面上遠程

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