getRealPath()返回本地系统中的实际路径,但在与.war文件一起部署时返回null .

<%@ page import="java.io.*" %>
<%@ page contentType="text/html;charset=ISO-8859-1" %> 
<%
int iLf = 10;
char cLf = (char)iLf;
String a= application.getResource("/");
//String myfile = application.getRealPath("/")+ "generate.xml";
//String myfile = request.getContextPath()+"generate.xml";
//String myfile = request.getRealPath("/")+"generate.xml";

out.println(myfile);    
File outputFile = new File(myfile);
outputFile.createNewFile();
FileWriter outfile = new FileWriter(outputFile);
outfile.write("  "+cLf);
outfile.write("  " +cLf);
outfile.write("  "+cLf); 
outfile.write(""+cLf); 
%>
 <%! String[] sports; %>
 <%
    sports = request.getParameterValues("sports");

    out.println("
hello
");

    if (sports != null)
    { 
         for (int i = 0; i < sports.length; i++)
         { 
              // outfile.writeln (sports[i]); 
              String total=sports[i];
              String[] sa=total.split("[,]");
              // String[] sub=new String();
              outfile.write(""+cLf);
              for (int j=0;j" + sa[0] +""+cLf); 
                }
                else if (j == 1)
                     {
                        outfile.write("" + sa[1] +""+cLf); 
                     }
                     else if( j==2)
                          {
                            outfile.write(""+cLf);
                          }

               }// end of inner for loop()       
               outfile.write(""+cLf);
         //outfile.writeln();
      }// end of outer for()
    } 
    //else outfile.writeln ("none");

  outfile.write("  "+cLf);
  outfile.write("  "+cLf);
  outfile.close();

  %>

ServletContext context = session.getServletContext();
String realContextPath = context.getRealPath(request.getContextPath());

ServletContext context = session.getServletContext();
InputStream is = context.getResourceAsStream("generate.xml");

    
        true