求救！出现java.lang.NullPointerException问题怎么解决？

来源：百度知道 编辑：UC知道 时间：2024/06/06 14:09:16
提示错误如下：
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
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
com.MembBean.addUser(MembBean.java:19)
org.apache.jsp.regiester.addmemb_jsp._jspService(addmemb_jsp.java:95)
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)

源代码为：

com.MembBean.addUser(MembBean.java:19)
org.apache.jsp.regiester.addmemb_jsp._jspService(addmemb_jsp.java:95)
这句是告诉你你的类com.MembBean的addUser方法出错，在MembBean.java的19行，报空指针异常，
下面这些依次是你调用这个方法的过程

求救！出现java.lang.NullPointerException问题怎么解决？
悬赏分：10 - 离问题结束还有 6 天 22 小时
提示错误如下：
org.apache.jasper.JasperException
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:372)
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
com.MembBean.addUser(MembBean.java:19)
org.apache.jsp.regiester.addmemb_jsp._jspService(addmemb_jsp.java:95)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.se