oops! when I use : <% if (user.length() == 0) { %>
I got an exception :
Error: 500
Location: /pcinfo/add.jsp
Internal Servlet Error:
javax.servlet.ServletException
at
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:459)
at
_0002fadd_0002ejspadd_jsp_31._jspService(_0002fadd_0002ejspadd_jsp_31.java:903)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
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