在Tomcat5.5上,貌似在JSP里不支持泛型

最新推荐文章于 2023-04-17 22:24:44 发布

benwdm

最新推荐文章于 2023-04-17 22:24:44 发布

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分类专栏： T_java 文章标签： JSP Servlet Java Apache Tomcat

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今天写一个极简单的功能,偷懒了,直接在JSP中嵌代码,为了省去Box/Unbox的麻烦,用了泛型.一跑起来,问题就来了,访问页面显示:

org.apache.jasper.JasperException: Unable to compile class for JSP

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
Syntax error on tokens, delete these tokens

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
Syntax error on token "<", ( expected

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
Syntax error on token "(", invalid Expression

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field

An error occurred at line: 4 in the jsp file: /knowledge/index.jsp
Generated servlet error:
subContents cannot be resolved or is not a field


	org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:84)
	org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:328)
	org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:397)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:288)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:267)
	org.apache.jasper.compiler.Compiler.compile(Compiler.java:255)
	org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:556)
	org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:293)
	org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:291)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:413)
	com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
	com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
	org.apache.struts2.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:99)

查来查去,没找出问题来,网上简单搜一下,也没发现相关解决方法,看到出错信息中出现尖括号,会不会是由于泛型造成错误呢,于是把泛型去掉,按传统方式处理.再运行一下,错误消失了.看来猜测的没错,但为什么泛型会造成这个问题,以及还有哪些版本的Tomcat会出现这个问题,还没深究.