哪个大哥细心看看我的代码吧

Question

<jsp:setProperty name="parm" property="parm"> 这句错掉啦~ 应该是
<jsp:setProperty name="parm" property="parm"/>

Answer 1

不好意思啊   但是我把那里改过来以后还是有错误
exception org.apache.jasper.JasperException
org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:359)
org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:306)
org.apache.jsp.deleteresult2_jsp._jspService(deleteresult2_jsp.java:76)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause java.lang.NullPointerException
org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:320)
org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:306)
org.apache.jsp.deleteresult2_jsp._jspService(deleteresult2_jsp.java:76)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Answer 2

还是讨论应用技术比较好 这东西 自己解决应该快
我就不相信你身边就你一个学JAVA的而且有些错误自己找出来的比较快

Answer 3

好像是某个对象为null教你个方法，把那些jsp page编译后的java文件找出来，一般在work目录里面。然后看这里
org.apache.jsp.deleteresult2_jsp._jspService(deleteresult2_jsp.java:76)
你找到那个文件的76行，一般错误就在那里了。

Answer 4

NullPointerException 仔细看看你代码 就知道那个地方对象为null了

Answer 5

你在代码里用try {}catch (Exception e){} 不就ok了，别等JSP页面给你打出来，直接在自己的Eclipse控制台看啊！！