Problems when using javascript in jsp
hello, i am implementing a program to upload files.
a user can upload either a pdf or a latex file.
so for example if the user uploads a pdf file the form action should be
"uploadPDF.jsp" and if it is a latex file the action is "uploadlatex.jsp"
currently when the user uploads the pdf file IT WORKS and does the action correctly but it does not do it for the other file (latex file) gives
some long jasper exceptions pls help
*************here is the code*******************
<SCRIPT LANGUAGE="JavaScript">
var extArray = new Array(".pdf", ".tex", ".txt");
function LimitAttach(form, file) {
allowSubmit = false;
if (!file) return;
while (file.indexOf("\\") != -1)
file = file.slice(file.indexOf("\\") + 1);
ext = file.slice(file.indexOf(".")).toLowerCase();
for (var i = 0; i < extArray.length; i++) {
if (ext = "pdf"){
document.forms[0].action.value = "uploadPDF.jsp";
allowSubmit = true;
break;
if (allowSubmit) form.submit();
else
alert("Please only upload files that end in types: "
+ (extArray.join(" ")) + "\nPlease select a new "
+ "file to upload and submit again.");
</script>
</HEAD>
and below is the form
<form action="" name="upform"enctype="multipart/form-data">
<input type="file" name="PDFfilename" size="50"><br>
<input type="hidden" name="todo" value="upload">
<input type="submit" name="Submit" value="Upload" onclick="LimitAttach(this.form, this.form.PDFfilename.value)">
</form>
thanks,
moh
when uploading this latex file in a different jsp file and form it works fine
however in the above form it does not...........here is the exception errors:
org.apache.jasper.JasperException: This file appears to be damaged and cannot be repaired. This may not actually be a PDF file.
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
root cause
javax.servlet.ServletException: This file appears to be damaged and cannot be repaired. This may not actually be a PDF file.
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:858)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:791)
org.apache.jsp.uploadPDF_jsp._jspService(uploadPDF_jsp.java:209)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
root cause
com.adobe.acrobat.pdfobjstore.CantRebuildXRefException: This file appears to be damaged and cannot be repaired. This may not actually be a PDF file.
com.adobe.acrobat.pdfobjstore.XRefTableRebuilder.buildTrailerDict(XRefTableRebuilder.java:141)
com.adobe.acrobat.pdfobjstore.XRefTableRebuilder.rebuildXRefTable(XRefTableRebuilder.java:121)
com.adobe.acrobat.pdfobjstore.XRefTableRebuilder.<init>(XRefTableRebuilder.java:46)
com.adobe.acrobat.pdfobjstore.XRefTable.<init>(XRefTable.java:44)
com.adobe.acrobat.pdfobjstore.XRefTable.<init>(XRefTable.java:64)
com.adobe.acrobat.pdfobjstore.PDFObjMap.compute(PDFObjMap.java:122)
com.adobe.pe.notify.VValue.handleRequest(VValue.java:172)
com.adobe.acrobat.pdfobjstore.PDFObjMap.getTrailerDictRef(PDFObjMap.java:49)
com.adobe.acrobat.pdfobjstore.VTrailerDict.computeReference(PDFObjStore.java:552)
com.adobe.acrobat.pdfobjstore.VPDFReference.compute(VPDFReference.java:150)
com.adobe.pe.notify.VValue.handleRequest(VValue.java:172)
com.adobe.acrobat.pdfobjstore.VPDFReference.pdfReferenceValue(VPDFReference.java:161)
com.adobe.acrobat.pdfobjstore.security.VEncryptionMethod.computeString(SecurityHandler.java:208)
com.adobe.pe.vtypes.VString.compute(VString.java:55)
com.adobe.pe.notify.VValue.handleRequest(VValue.java:172)
com.adobe.pe.vtypes.VString.stringValue(VString.java:126)
com.adobe.acrobat.pdfobjstore.security.VPDFObjStorePerms.computePDFObjStorePerms(VPDFObjStorePerms.java:41)
com.adobe.acrobat.pdfobjstore.security.VPDFObjStorePerms.compute(VPDFObjStorePerms.java:54)
com.adobe.pe.notify.VValue.handleRequest(VValue.java:172)
com.adobe.acrobat.pdfobjstore.security.VPDFObjStorePerms.peObjStorePermsValue(VPDFObjStorePerms.java:32)
com.adobe.acrobat.gui.AcroViewContext.setByteArraySource(AcroViewContext.java:587)
com.adobe.acrobat.Viewer$3.buildChanges(Viewer.java:907)
com.adobe.pe.notify.Transactor.commit(Transactor.java:70)
com.adobe.acrobat.Viewer.setByteArraySource(Viewer.java:911)
com.adobe.acrobat.Viewer.setDocumentByteArray(Viewer.java:948)
com.adobe.acrobat.Viewer.setDocumentInputStream(Viewer.java:971)
org.apache.jsp.uploadPDF_jsp._jspService(uploadPDF_jsp.java:106)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:322)
com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:130)
com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:200)
com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:117)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:368)
on the first line it says that the file may be corrupted but it is fine and works, thanks
moh
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public Person(String name, int age, String city)
this.name = name;
this.age = age;
this.city = city;
public Person()
public void setName(String name)
this.name = name;
public String getName()
return name;
public void setAge(int age)
this.age = age;
public int getAge()
return age;
public void setCity(String city)
this.city = city;
public String getCity()
return city;
public class PersonFactory
public PersonFactory()
public List getPersons()
List list = new ArrayList();
list.add(new Person("peit", 18, "dalian"));
list.add(new Person("robin", 22, "shenyang"));
list.add(new Person("Joe", 30, "York"));
list.add(new Person("Edi", 23, "Beijing"));
return list;
public List getNames()
List list = new ArrayList();
list.add("Peit");
list.add("Robin");
list.add("Joe");
list.add("Edi");
return list;
public void commit()
System.out.println("Data commited");
I created the PersonFactory class as DataControl, so I can use the getPersons() and getNames()(just for test, so they are simple), I drag the names from
the DataControl palette as Table in a JClientPanel, good luck, it works and displays the 4 Strings in a table, but when I drag the persons from
the DataControl palette as Table in the same JClientPanel, it does not work and raises exception :
java.lang.NullPointerException
at javax.swing.JTable.prepareRenderer(JTable.java:3731)
at javax.swing.plaf.basic.BasicTableUI.paintCell(BasicTableUI.java:1149)
at javax.swing.plaf.basic.BasicTableUI.paintCells(BasicTableUI.java:1051)
at javax.swing.plaf.basic.BasicTableUI.paint(BasicTableUI.java:974)
So, I confused why? How to edit it properly?
Thanks.
Message was edited by:
[email protected]Hi, Frank
Thank you for your reply.
I am sorry for not explaining well. I mean that the getNames() works fine, but getPersons() does not. The only diferenece between them is the former is simple string and the latter is javabean, but when I made the PersonFactory as DataControl, I set the bean class Person for the getPersons()(list of persons) bean class.
I debuged the class, the exceptions raised when the table for getPersons() setModel() method called.
So, where is the problem?
Thanks.
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