Java web simple JSP login interface display
Is according to the post the original copy of https://www.cnblogs.com/yibao/p/6441213.html

Finally the logincheck report out this mistake
Org. Apache. Jasper. JasperException: Java. Lang. NullPointerException
Org. Apache. Jasper. Servlet. JspServletWrapper. HandleJspException (JspServletWrapper. Java: 599)
Org. Apache. Jasper. Servlet. JspServletWrapper. Service (515) JspServletWrapper. Java:
Org. Apache. Jasper. Servlet. JspServlet. ServiceJspFile (JspServlet. Java: 395)
Org. Apache. Jasper. Servlet. JspServlet. Service (339) JspServlet. Java:
Javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 728)
Org, apache tomcat, websocket server. WsFilter. DoFilter (WsFilter. Java: 52)



The fundamental reason for the
Java. Lang. NullPointerException
Org. Apache. JSP. Logincheck_jsp. _jspService (logincheck_jsp. Java: 107)
Org. Apache. Jasper. Runtime. HttpJspBase. Service (HttpJspBase. Java: 71)
Javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 728)
Org. Apache. Jasper. Servlet. JspServletWrapper. Service (477) JspServletWrapper. Java:
Org. Apache. Jasper. Servlet. JspServlet. ServiceJspFile (JspServlet. Java: 395)
Org. Apache. Jasper. Servlet. JspServlet. Service (339) JspServlet. Java:
Javax.mail. Servlet. HTTP. HttpServlet. Service (HttpServlet. Java: 728)
Org, apache tomcat, websocket server. WsFilter. DoFilter (WsFilter. Java: 52)

Save the children.

CodePudding user response:

Should be free inside the code value

CodePudding user response:

reference 1st floor zzxiaoma response:

should be free inside the code values

Is available in the logincheck value

CodePudding user response:

The article is posted in the logincheck code

CodePudding user response:

If you did not add user data in the database