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I have a Login.jsp page.When I try to run it on server I get the following error:
type Exception report
message Unable to compile class for JSP:
description The server encountered an internal error that prevented it from fulfilling this request.
org.apache.jasper.JasperException: Unable to compile class for JSP:
An error occurred at line: [1] in the generated java file:
The type java.util.Map$Entry cannot be resolved. It is indirectly referenced from required .class files
Stacktrace:
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:103)
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:366)
org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:468)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:378)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:353)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:340)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:646)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:357)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.47 logs.
What causes this error?
1,79952445
I found the solution I changed from Apache 7 to Apache 8 now things are working fine !
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Stack Overflow works best with JavaScript enabled33601 & org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated
ASF Bugzilla & Bug&33601
- org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.tools.javac.Main has been deprecated
org.apache.jasper.JasperException: Unable to compile class for JSPNote: sun.t...
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Windows XP
Tomcat Developers Mailing List
08:34 UTC by ren quebral
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& & & 在上一篇博文中，我们把自己本机的web项目部署到了云主机的tomcat上。之后通过浏览器访问时，如果出现 &HTTP 500-Unable to compile class for JSP 的错误，应该怎么解决呢？
&&&&& 通常，造成这种错误的原因是你开发时所用的jdk版本以及本地测试时的tomcat版本比云主机上搭建的jdk版本以及tomcat版本低造成的。
&&&&& 解决方法：重新搭建云主机的jdk以及tomcat，版本选择开发时myeclipse所用jdk版本。
&&&& 1：查看开发所用jdk版本。
&&&& 在myeclipse中点击File，Properties，左侧栏选择BuildPath。
&&&& 如上图，JRE System Library[Sun JDK 1.6.0_13]即为我的项目编译时所用的JDK版本。
&&& 2：根据上面得到的JDK版本，下载相应的tar.gz文件，参照博文&&&&&&&&&&&&&&& 搭建JDK。
&&& 3：根据JDK版本选择tomcat：一般选择与JDK版本相应的tomcat。比如这里JDK6，所以我搭建了tomcat6。当然也可以选择tomcat7，8，9。记住，tomcat的版本必须大于等于JDK的版本。
&& 4：重新部署web项目。
阅读(...) 评论()关于jsp中的Unable to compile class for JSP解决
我在一个ajax项目中引用了xml，在写到Document xmlDoc = (Document)new XPPReader().read(new ByteArrayInputStream(xml.getBytes()));
的时候，出现
然后百度了一下，说是要加载pull-parser-2.1.10.jar包，于是我把这个包加到工程中，同时在jsp开头包含进对应的类
&%@page import="org.gjt.xpp.*"%&
然后这错误也就不见了
jsp写完了，开开心心启动程序，一运行，结果又开始出现错误，还是一样的错误，想必刚刚是指标不治本。
查看异常说明，看到这样一句
Unable to compile class for JSP
怎么会不能编译呢，于是又百度，这次是说把工程下的servlet-api.jar和jsp.api.jar删除掉
我找了一下，我的工程只有servlet-api.jar,没有jsp.api.jar，我把servlet-api.jar删掉了，但是一删掉，工程中引用了这个包的类全都报错
显然这个方法行不通，于是我又把这个包添加回来。
上次写到一半，现在忘记具体细节了，只记得是要把servlet-api.jar放到工程的lib下，不能放在工程外面。应该是程序运行的时候，在lib下查找对应的类吧。
没有更多推荐了，JSP错误：Unable to compile class for JSP
项目中的诸如：catalina.jar、jsp-api.jar、servlet-api.jar、javax.servlet.jar、javax.servlet.jsp.jar等包和应用服务器（JBoss/Tomcat等）中的包重复且比其版本低
，应用服务器在启动时会优先加载项目中的包，这样就导致和应用服务器中的其它包不匹配。可把重复的包从项目中删除，或将应用服务器下的这些包拷贝到项目中，重启服务
没有更多推荐了，}