将java类导入JSP
这就是问题所在。
我使用 NetBeans 7、Tomcat 7 和 hsqldb 开发了一个 Web 应用程序；在我的桌面上一切正常。
当我将 java 文件（.class、.jsp 和 .jar 包）上传到我的站点并尝试加载一个 jsp 页面时，该页面导入包中包含的类（包 中的类 ），我收到以下错误：FunzioniSessione it.swlab.util
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 6 in the generated java file
Only a type can be imported. it.swlab.util.FunzioniSessione resolves to a package
An error occurred at line: 7 in the jsp file: /index.jsp
FunzioniSessione cannot be resolved to a type
4: <%
5: synchronized(this)
6: {
7: FunzioniSessione funzioniSessione = new FunzioniSessione();
8: String percorso = config.getServletContext().getRealPath("/");
9: funzioniSessione.inizializza(session,request,response,percorso,"infocar");
10: boolean connesso = session.getAttribute("utenteConnesso") != null;
An error occurred at line: 7 in the jsp file: /index.jsp
FunzioniSessione cannot be resolved to a type
4: <%
5: synchronized(this)
6: {
7: FunzioniSessione funzioniSessione = new FunzioniSessione();
8: String percorso = config.getServletContext().getRealPath("/");
9: funzioniSessione.inizializza(session,request,response,percorso,"infocar");
10: boolean connesso = session.getAttribute("utenteConnesso") != null;
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:93)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:328)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:307)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:565)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:309)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.33 logs.
为了防止出现一些明显的答案，我添加了一些更多信息：
- 包含类 FunzioniSessione 的包（名为
funzioniComuni.jar）位于WEB-INF\lib文件夹 - 我无法按照堆栈跟踪中的注释查看日志，因为我无权访问提供商的 Tomcat 服务器的日志文件夹。 3 导入指令为
<%@page import="it.swlab.util.FunzioniSessione"%>我也尝试过使用“;”最后 (<%@page import="it.swlab.util.FunzioniSessione;"%>) 但没有成功。
我等待一些建议。
谢谢
That's the problem.
I developed a web app with NetBeans 7, Tomcat 7 and hsqldb; on my desktop all is Ok.
When I upload my java files (.class, .jsp and .jar packages) to my site and try to load a jsp page which imports a class contained in a package (class FunzioniSessione in package it.swlab.util), I get the following error:
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: 6 in the generated java file
Only a type can be imported. it.swlab.util.FunzioniSessione resolves to a package
An error occurred at line: 7 in the jsp file: /index.jsp
FunzioniSessione cannot be resolved to a type
4: <%
5: synchronized(this)
6: {
7: FunzioniSessione funzioniSessione = new FunzioniSessione();
8: String percorso = config.getServletContext().getRealPath("/");
9: funzioniSessione.inizializza(session,request,response,percorso,"infocar");
10: boolean connesso = session.getAttribute("utenteConnesso") != null;
An error occurred at line: 7 in the jsp file: /index.jsp
FunzioniSessione cannot be resolved to a type
4: <%
5: synchronized(this)
6: {
7: FunzioniSessione funzioniSessione = new FunzioniSessione();
8: String percorso = config.getServletContext().getRealPath("/");
9: funzioniSessione.inizializza(session,request,response,percorso,"infocar");
10: boolean connesso = session.getAttribute("utenteConnesso") != null;
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:93)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:451)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:328)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:307)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:565)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:309)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:308)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:259)
javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5.33 logs.
To prevent some obvious answers, I add some more information:
- The package containing the class FunzioniSessione (named
funzioniComuni.jar) is in theWEB-INF\libfolder - I can't look at the logs as the note in the stacktrace suggests, because I have no access to the logs folder of my provider's Tomcat server.
3 The directive for the import is<%@page import="it.swlab.util.FunzioniSessione"%>I tried also with a ";" at the end (<%@page import="it.swlab.util.FunzioniSessione;"%>) but with no success.
I wait for some suggestions.
Thank you
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FunzioniSessione 在您的类路径中吗？一般来说，我们将类保存在已经在 onclasspth 中的 web-inf\classes 中。您能否确保部署目录具有这种结构，并且您的类位于预期的包中？
Is the FunzioniSessione on you classpath ? Generally we keep the classes in web-inf\classes which is already onclasspth. Can you ensure the deployment directory has this structure with you class in expected package ?