后台获取不到前台JSP页面的值...
JSP页面:
<form id="form" method="post" action="servlet/JspServlet">
<TABLE>
<TR>
<TD>
<INPUT type="text" id="year" .../>
</TD>
</TR>
<TR>
<TD>
<INPUT type="text" id="month1" .../>
</TD>
</TR>
<TR>
<TD>
<INPUT type="text" id="month2" .../>
</TD>
</TR>
<TR>
<TD>
<INPUT type="text" id="month3" .../>
</TD>
</TR>
...
<TR>
<TD>
<INPUT type="submit" .../>
</TD>
</TR>
</TABLE>
</FORM>
WEB.XML:
<servlet>
<servlet-name>JspServlet</servlet-name>
<servlet-class>
com.sysnet.sms.baseclass.jspservlet.JspServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>JspServlet</servlet-name>
<url-pattern>/servlet/JspServlet</url-pattern>
</servlet-mapping>
后台用request.getParameter()方法,为何只能得到year的值,month1,month2...的值都是NULL,这是怎么回事?