我正在尝试从.txt文件中读取.jsp页面中的一些数据。但是我得到了这个错误:
有根本原因
java.io.FileNotFoundException: Predicciones\predicciones.txt (System can't find path specified)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at java.io.FileInputStream.<init>(FileInputStream.java:97)
at org.apache.jsp.getDatosPredicciones_jsp._jspService(getDatosPredicciones_jsp.java:123)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:419)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
代码是这样的:
{
int partido = Integer.parseInt(request.getParameter("partido"));
int irabazlea;
float probabilidad;
FileInputStream fstream = new FileInputStream("Predicciones\\predicciones.txt");
DataInputStream in = new DataInputStream(fstream);
BufferedReader br = new BufferedReader(new InputStreamReader(in));
String strLine;
int kont=1;
while (((strLine = br.readLine()) != null) && (kont<=partido))
问题出在哪里? “Predicciones”目录与jsp位于同一级别。
我试图将“Predicciones”目录放在WEB-INF中,但它不起作用。
答案 0 :(得分:2)
如果您的文件位于您的Web应用程序根目录中,请尝试使用
FileInputStream fstream = new FileInputStream(application.getRealPath("/Predicciones/predicciones.txt"));
答案 1 :(得分:0)
是的,但是jsp被编译并放在与实际jsp文件不同的地方。
要从WEB-INF文件夹中访问文件,请使用
/WEB-INF/foldername/resource.ext
请注意 / 。
如果您使用/folder/me.jpg作为路径,那么您可以访问此文件ww.mydomain.com/appname/folder/me.jpg,除非应用程序以root身份部署。在这种情况下,您将访问这个资源ww.mydomain.com/folder/me.jpg
要访问资源,请阅读http://docs.oracle.com/javase/1.4.2/docs/guide/resources/resources.html
在您的情况下,您可以使用绝对路径访问该文件,例如://apache //webapps/myapp/myfolder...et或您可以使用相对路径,其中资源相对于已编译的.class文件