<%
String cdir=request.getParameter("dir");
cdir=new String(cdir.getBytes("iso-8859-1"),"UTF-8");
String realDir=application.getRealPath("/shared"+cdir);
File f=new File(realDir);
%>
错误提示:type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: An exception occurred processing JSP page /re.jsp at line 1916: <body>
17: <%
18: String cdir=request.getParameter("dir");
19: cdir=new String(cdir.getBytes("iso-8859-1"),"UTF-8");
20: String realDir=application.getRealPath("/shared"+cdir);
21: File f=new File(realDir);
22: %>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:519)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:428)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause java.lang.NullPointerException
org.apache.jsp.re_jsp._jspService(re_jsp.java:69)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.32 logs.这是为什么呢
可以帮忙解决一下
String cdir=request.getParameter("dir");
cdir=new String(cdir.getBytes("iso-8859-1"),"UTF-8");
String realDir=application.getRealPath("/shared"+cdir);
File f=new File(realDir);
%>
错误提示:type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception org.apache.jasper.JasperException: An exception occurred processing JSP page /re.jsp at line 1916: <body>
17: <%
18: String cdir=request.getParameter("dir");
19: cdir=new String(cdir.getBytes("iso-8859-1"),"UTF-8");
20: String realDir=application.getRealPath("/shared"+cdir);
21: File f=new File(realDir);
22: %>
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:519)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:428)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
root cause java.lang.NullPointerException
org.apache.jsp.re_jsp._jspService(re_jsp.java:69)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:386)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.32 logs.这是为什么呢
可以帮忙解决一下
19: cdir=new String(cdir.getBytes("iso-8859-1"),"UTF-8");
把cdir打印出来看看,或用if(cdir==null)做个判断,应该是个空值
可能是request中没有“dir”这个参数
检查提交过来的页面上面的dir的参数名称是否写错了,或者是根本没有这个dir的参数名称!
cdir获取到的为null,当你调用getBytes()时,故抛出著名的java.lang.NullPointerException
检查提交过来的页面上面的dir的参数名称是否写错了,或者是根本没有这个dir的参数名称!
[/Quot]
同意……
String cdir=request.getParameter("dir");
if((cdir==null)||(cdir.equal("")){
throw new RuntimeException("值出错。");
}else{
cdir=new String(cdir.getBytes("iso-8859-1"),"UTF-8");
String realDir=application.getRealPath("/shared"+cdir);
File f=new File(realDir);
}