org.apache.jasper.JasperException:

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: For input string: "huizhong"	org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:359)	org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:306)	org.apache.jasper.runtime.JspRuntimeLibrary.introspect(JspRuntimeLibrary.java:284)	org.apache.jsp.jobseeker.regDo_jsp._jspService(regDo_jsp.java:58)	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

org.apache.jasper.JasperException: For input string: "huizhong"	org.apache.jasper.runtime.JspRuntimeLibrary.convert(JspRuntimeLibrary.java:271)	org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:353)	org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:306)	org.apache.jasper.runtime.JspRuntimeLibrary.introspect(JspRuntimeLibrary.java:284)	org.apache.jsp.jobseeker.regDo_jsp._jspService(regDo_jsp.java:58)	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.NumberFormatException: For input string: "huizhong"	java.lang.NumberFormatException.forInputString(Unknown Source)	java.lang.Integer.parseInt(Unknown Source)	java.lang.Integer.<init>(Unknown Source)	org.apache.jasper.runtime.JspRuntimeLibrary.convert(JspRuntimeLibrary.java:253)	org.apache.jasper.runtime.JspRuntimeLibrary.internalIntrospecthelper(JspRuntimeLibrary.java:353)	org.apache.jasper.runtime.JspRuntimeLibrary.introspecthelper(JspRuntimeLibrary.java:306)	org.apache.jasper.runtime.JspRuntimeLibrary.introspect(JspRuntimeLibrary.java:284)	org.apache.jsp.jobseeker.regDo_jsp._jspService(regDo_jsp.java:58)	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)

note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.

Apache Tomcat/5.0.28

解决方法

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

No Java compiler was found to compile the generated source for the JSP.
This can usually be solved by copying manually $JAVA_HOME/lib/tools.jar from the JDK
to the common/lib directory of the Tomcat server, followed by a Tomcat restart.
If using an alternate Java compiler, please check its installation and access path. 

这个异常一般是

1-   jsp文件编写错误，里面可能包含错误的代码。
2 -  是你的jdk没有配置好。环境变量或路径设置不对。
还有，用浏览器打开：http://localhost:8080
如果出现提示成功画面，那说明八成是JSP文件有问题。
一般要把jsp文件放在ROOT目录下才可以正常运行。