JSP中出现org.apache.jasper.JasperException

来源：百度知道 编辑：UC知道 时间：2024/05/19 04:16:00
在JSP中出现如下提示：
type Exception report

message

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

exception

org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:346)
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:810)

root cause

java.lang.NullPointerException
hospital.db.dboperation.Doctor.checkUser(Doctor.java:193)
hospital.db.dboperation.DBOperation.<init>(DBOperation.java:30)
hospital.db.dboperation.Doctor.<init>(Doctor.java:23)
org.apache.jsp.doctor.login_jsp._jspService(login_jsp.java:98)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.serv

java.lang.NullPointerException
hospital.db.dboperation.Doctor.checkUser(Doctor.java:193)

这行代码没有判空

出错信息永远是最好的解决问题的手段

也许你该对你需要接收的重客户端响应的数据进行一下空的判断
要不然会出异常的