Member Avatar for dazzagaelic

Having trouble getting my AttachmentServlet.java and FilterServelt.java to compile

the following is the code (for which the error applies) then the error for each.

AttachmentServlet.java

HttpSession session = request.getSession();
ServletOutputStream out = response.getOutputStream();
int msgNum = Integer.parseInt(request.getParameter("message"));
int partNum = Integer.parseInt(request.getParameter("part"));
MailUserBean mailuser = (MailUserBean)session.getAttribute("mailuser");

cannot find symbol
symbol : method getAttribute(java.lang.String)
location: interface javax.servlet.http.HttpSession

inconvertible types
found : javax.servlet.http.HttpSession.getAttribute
required: demo.MailUserBean


FilterServlet.java

HttpSession session = request.getSession();
MailUserBean mailuser = (MailUserBean)session.getAttribute("mailuser");
String servletPath = request.getServletPath();
servletPath = servletPath.concat(".jsp");

cannot find symbol
symbol : method getAttribute(java.lang.String)
location: interface javax.servlet.http.HttpSession

inconvertible types
found : javax.servlet.http.HttpSession.getAttribute
required: demo.MailUserBean

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  • Latest Post Latest Post by dazzagaelic

Dani AI

Generated

Short diagnosis and a practical checklist.

Contrary to , javax.servlet.http.HttpSession does provide attribute accessors — the compiler error here means the project is compiling against a different/corrupt HttpSession type (or another servlet JAR) so the call your code expects does not exist at compile time. That also explains the odd "inconvertible types" symptom: the compiler has resolved the wrong type, not your bean. and were on the right track with version/class issues and null-checking the session bean; the missing piece is fixing the compile-time classpath.

What to check (in order)

  • Verify which HttpSession is on the compile classpath. In your IDE use “Open Type” on javax.servlet.http.HttpSession or inspect the servlet jar with these commands:
    
# Unix-like
jar tf /path/to/servlet-api.jar | grep HttpSession
javap -classpath /path/to/servlet-api.jar javax.servlet.http.HttpSession

Windows

jar tf C:\path\to\servlet-api.jar | findstr HttpSession

- Remove duplicate servlet jars from the webapp. Do not put servlet-api/servlet.jar in WEB-INF/lib; the container supplies it. For Maven projects use provided scope:

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>

- Ensure there are no other classes named HttpSession in your packages and that your source imports javax.servlet.http.HttpSession (or temporarily use the fully qualified type to confirm).
- Clean/rebuild after fixing libraries. Also verify there are no earlier syntax errors that make the compiler mis-parse the cast expression.

About the WSDL/SOAP warning
That warning comes from the WSDL codegen (it’s telling you it ignored a SOAP 1.2 port unless extensions are allowed). Two practical options: run the generator with the extension flag (for JAX-WS/tools use the tool’s -extension switch) or update your IDE/tooling (as noted in this thread, an IDE upgrade resolved it). Example:

wsimport -extension -keep -p com.example.client 



After the classpath is fixed the session-bean pattern suggested by @deepalihanand (retrieve, null-check, create and set if absent) will compile and behave correctly.

Recommended Answers

All 6 Replies

Member Avatar for sillyboy

there is no such thing as javax.servlet.http.HttpSession.getAttribute()

Member Avatar for kvprajapati

I think that you are using different version of MailUserBean.

Member Avatar for deepalihanand

According to me - try this :

HttpSession session = request.getSession();

MailUserBean nameBean =
      (MailUserBean)session.getAttribute("nameBean");

    if (nameBean == null) {
      ...Your steps //String firstName = request.getParameter("firstName");
      //String lastName = request.getParameter("lastName");
      //nameBean = new MailUserBean(firstName, lastName);
      session.setAttribute("nameBean", nameBean);
    }

Do let me know, if it works. If it does not do send the complete code.

Thanks

Member Avatar for dazzagaelic

--------------------------------------------------------------------------------

Okay got past the last problem, but now it is showing the following error, but I'm not sure where exactly it wants me to add the -extension

[WARNING] Ignoring SOAP port "LicenseServiceSoap12": it uses non-standard SOAP 1.2 binding.
You must specify the "-extension" option to use this binding.
line 248 of file:/C:/softwaresource/unchanged/GTDev/GlobalTraderUtils/xml-resources/web-service-references/LicenseService.asmx/wsdl/software.globaltradertech.com/LicenseService.asmx.wsdl

Any ideas.

Member Avatar for kvprajapati

--------------------------------------------------------------------------------

Okay got past the last problem, but now it is showing the following error, but I'm not sure where exactly it wants me to add the -extension

[WARNING] Ignoring SOAP port "LicenseServiceSoap12": it uses non-standard SOAP 1.2 binding.
You must specify the "-extension" option to use this binding.
line 248 of file:/C:/softwaresource/unchanged/GTDev/GlobalTraderUtils/xml-resources/web-service-references/LicenseService.asmx/wsdl/software.globaltradertech.com/LicenseService.asmx.wsdl

Any ideas.

Hi,
the missing -extension switch in J2SE project is a known bug in NB5.5.1 which will be fixed soon in a hotfix update.

Member Avatar for dazzagaelic

Yes, good call, 5.5 compiled it fine.

thanks

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