【发布时间】：2015-09-01 08:05:01
【问题描述】：
我遇到过这个奇怪的错误，现在我将解释何时发生这种情况： 基本上我要做的就是拥有一个带有简单文本字段和两个按钮的 HTML 表单（或 JSP，并不重要），一个用于提交到 .jsp 页面，另一个只是重置文本字段。 一切正常，除非我尝试在文本字段中写入带有空格的内容（例如：“abc 123”）。 如果我只是写“abc123”，它不会给出任何错误 500。
我希望你们中的一些人可以帮助我，这里是来源：
<html>
<head>`<html>
<head>
<meta charset="ISO-8859-1">
<title>HTML Form</title>
</head>
<body>
<form name = "intoll" method = "post" action = "send.jsp">
Insert text: <input type = "text" name = "food" id = "food">
<br/>
<input type = "submit" name = "send" value = "Send">
<input type = "reset" name = "Reset">
</form>
</body>
send.jsp:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ page import="com.athirat.intolleranze.foods.*" %>
<%
String food = request.getParameter("food").trim();
if (food != null && food != "") {
food = food.toLowerCase();
out.print(food);
NetMaster.init(food);
}
%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>
<%
try {
out.print(NetMaster.showContent());
} catch (Exception e) {
throw new Exception("String error");
}
%>
</body>
</html>
谢谢你帮助我。
编辑： 堆栈跟踪
giu 16, 2015 3:06:12 PM org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() for servlet [jsp] in context with path [/intoll] threw exception [An exception occurred processing JSP page /send.jsp at line 22
19: try {
20: out.print(NetMaster.showContent());
21: } catch (Exception e) {
22: throw new Exception("String error");
23: }
24: %>
25: </body>
Stacktrace:] with root cause
java.lang.Exception: Errore nella stringa
at org.apache.jsp.send_jsp._jspService(send_jsp.java:113)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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:502)
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:617)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
giu 16, 2015 3:23:56 PM org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() for servlet [jsp] in context with path [/intoll] threw exception [An exception occurred processing JSP page /send.jsp at line 22
19: try {
20: out.print(NetMaster.showContent());
21: } catch (Exception e) {
22: throw new Exception("String error");
23: }
24: %>
25: </body>
Stacktrace:] with root cause
java.lang.Exception: Errore nella stringa
at org.apache.jsp.send_jsp._jspService(send_jsp.java:113)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
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:502)
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:617)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:668)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1521)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1478)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
这是 showContent 方法，它被称为方法：
public static String showContent() throws Exception {
if (isFood())
return getContent();
else
return "LOG Creato: " + generateLogFile();
}
private static String generateLogFile() throws Exception {
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
String logname = "foodLog_" + sdf.format(cal.getTime());
String logdir = ps.getProperty("logfolder");
File f = new File ("." + logdir + logname + ".log");
FileOutputStream fout = new FileOutputStream(f);
DataOutputStream dout = new DataOutputStream(fout);
System.out.println(logname);
System.out.println(logdir);
System.out.println(f.getParent());
dout.writeBytes(food + " non esistente, si prega di aggiungerlo");
fout.close();
return logname;
}
private static String getContent() {
String result = "{[";
@SuppressWarnings("resource")
Scanner sc = new Scanner(inputReader).useDelimiter("\\A");
result += sc.hasNext() ? sc.next() : "";
return result;
}
【问题讨论】：
-
请添加堆栈跟踪。
-
Stacktrace 添加到第一篇文章
-
showContent方法有什么作用？ -
什么是 NetMaster.showContent())？
-
添加了关于 showContent 的信息