org.apache.jasper.JasperException: java.lang.NullPointerException [英] org.apache.jasper.JasperException: java.lang.NullPointerException

问题描述

每次我尝试加载我的网络应用程序时都会遇到此异常:

i got this exception everytime i try to load my webapp:

例外

org.apache.jasper.JasperException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:538)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:370)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

根本原因

java.lang.NullPointerException
org.apache.jsp.index_jsp._jspInit(index_jsp.java:22)
org.apache.jasper.runtime.HttpJspBase.init(HttpJspBase.java:52)
org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:164)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:340)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

我该如何解决这个异常?

how can i solve this exception?

推荐答案

我也遇到过同样的问题.我得到了解决这个问题的方法.

I had also faced the same problem. I got the solution to solve this problem.

这个问题的根源是:我在我的应用程序库目录中添加了 servlet-api.jar 和 jsp-api.jar.如果使用 Apache-tomcat 运行应用程序，则无需在我们的 lib 目录中添加此 jar 文件.

Root of this problem is: I had added the servlet-api.jar and jsp-api.jar in my application lib directory. If Apache-tomcat is used to run application then its not necessary to add this jar files in our lib directory.

解决方案:

• 转到构建路径 -> 从 tomcat-lib 目录添加外部 jar.
• 而不是在应用程序的 lib 目录中添加(复制)它.

如果有任何问题，请联系我.

If have any problem, contact me.

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