jsp关于空指针的错误问题
程序代码：<!--member.jsp实现了新会员注册和会员信息修改-->
<%@page contentType="text/html;charset=gbk"%>
<%@page import ="member.member.biz.*" %>
<%@page import="member.member.model.*" %>
<%
response.setContentType("text/htm;charset=gbk");
request.setCharacterEncoding("gbk");
%>
<%!
//该函数用于从当前表单中获取各项数据，并将其封装成ProductEntity对象
public MemberEntity getMember(HttpServletRequest request)
{
MemberEntity member=new MemberEntity();
member.setID((new Integer(request.getParameter("ID"))).intValue());
member.setMember_Name(request.getParameter("Member_Name"));
member.setMember_Sex(request.getParameter("Member_Name"));
member.setMember_City(request.getParameter("Member_City"));
member.setMember_Address(request.getParameter("Member_Address"));
member.setMember_ZipCode(request.getParameter("Member_ZipCode"));
member.setMember_Tel(request.getParameter("Member_Tel"));
member.setMember_Email(request.getParameter("Member_Email"));
member.setMember_Credit(request.getParameter("Member_Credit"));
member.setMember_Account(request.getParameter("Member_Account"));
member.setMember_Password(request.getParameter("Member_Password"));
member.setComment(request.getParameter("Comment"));
return member;
}
%>
<%
//type参数用以标识操作类型，register表示注册新会员，edit表示显示会员详细信息
String type=request.getParameter("type");
//action参数用以判断表单是否提交
String action=request.getParameter("action");
//id参数用以标识会员ID
System.out.println("-------------"+request.getParameter("ID")+"=========");
int id=0;
//if(request.getParameter("ID")!=null&&request.getParameter("ID")!="")
id=(new Integer(request.getParameter("ID"))).intValue();
//errMessage表示错误提示信息
String errMessage="";
//创建会员对象
MemberEntity member=new MemberEntity();
//如果表单被提交，则保存当前会员信息
if(action!=null)
{
MemberBiz memberBiz=new MemberBiz();
member=getMember(request);
try
{
//如果id为0，表示新会员注册
if(id==0)
memberBiz.registerMember(member);
//如果是修改会员信息
else
memberBiz.updateMember(member);
//执行重定位
//有错
response.sendRedirect("login.jsp");
}
catch (Exception e)
{errMessage=e.getMessage();}
}
//如果是现实会员详细信息
else
{
if("edit".equals(type))
{
MemberBiz memberBiz=new MemberBiz();
try
{
//调用业务类的findById方法，根据id和表名查找会员
member=(MemberEntity)memberBiz.findById("Member",id);
}
catch (Exception e)
{ errMessage=e.getMessage();}
}
}
%>
<html>
<head>
<title>
会员详细信息
</title>
</head>
<body>
<%@ include file="../Top.jsp" %>
<form name="register" method=post action="member.jsp?action=submit&type=<%=type%>">
<table align=center valign=middle cellpadding=1 cellspacing=1 class=table>
<tr>
<td colspan="2" align="center" class="tr">会员详细信息</td>
</tr>
<tr>
<td class="td">会员姓名：</td>
<td class="td"><input type="radio" name="Member_Sex" value="男"<% if(("男").equals(member.getMember_Sex())) out.print("checked");%>>男
<input type="radio" name="Member_Sex" value="女"<% if(("女").equals(member.getMember_Sex())) out.print("checked");%>>女</td>
</tr>
<TR>
<td class=td>所在城市：</TD>
<TD class=td> <input type="text" name="Member_City" value=<%=member.getMember_City()%>></TD>
</TR>
<TR>
<TD class=td>家庭住址：</TD>
<TD class=td><input type="text" name="Member_Address" size=30 value=<%=member.getMember_Address() %>><font color=red>*</font></TD>
</TR>
<TR>
<TD class=td>邮政编码：</TD>
<TD class=td><input type="text" name="Member_ZipCode" value=<%=member.getMember_ZipCode()%>></TD>
</TR>
<TR>
<TD class=td>联系电话：</TD>
<TD class=td><input type="text" name="Member_Tel" value=<%=member.getMember_Tel()%>></TD>
</TR>
<TR>
<TD class=td>E-mail：</TD>
<TD class=td><input type="text" name="Member_Email" value=<%=member.getMember_Email()%>></TD>
</TR>
<TR>
<TD class=td>会员信誉：</TD>
<TD class=td> <select name="Member_Credit">
<option value="优秀"<% if(("").equals(member.getMember_Credit())||("优秀").equals(member.getMember_Credit()))
out.print("selected");%>>优秀</option>
<option value="合格"<% if(("合格").equals(member.getMember_Credit()))
out.print("selected");%>>合格</option>
<option value="不合格"<% if(("不合格").equals(member.getMember_Credit()))
out.print("selected");%>>不合格</option>
</select>
</TD>
</TR>
<TR>
<TD class=td>登录账号：</TD>
<TD class=td><input type="text" name="Member_Account" value=<%=member.getMember_Account()%>><font color=red>*</font></TD>
</TR>
<TR>
<TD class=td>登录密码：</TD>
<TD class=td><input type="text" name="Member_Password" value=<%=member.getMember_Password()%>><font color=red>*</font></TD>
</TR>
<TR>
<TD class=td>备注：</TD>
<TD class=td><textarea name="Comment" cols=40 rows=4><%=member.getComment()%></textarea></TD>
</TR>
<TR>
<TD colspan=2 align=center class=tr><input class =bt type="button" value="注册" onclick="savaMember();"></TD>
</TR>
</table>
<input type =hidden name=ID value=<%=member.getID()%>>
</form>
<hr><div align=center ><font color="red" ><%=errMessage%></font></div>
</body>
<script language="javascript">
function saveMember()
{
if(validate())
document.forms[0].submit();
}
//
function validate()
{
var doc=document.forms[0];
if(doc.Member_Name.value=="")
{alert("会员姓名不能为空！");
return false;}
if(doc.Member_Address.value=="")
{alert("会员住址不能为空！！");
return false;}
if(doc.Member_Account.value=="")
{alert("会员账号不能为空！！");
return false;}
if(doc.Member_Password.value=="")
{alert("会员 密码不能为空！！");
return false;}
return true;
}
</script>
</html>
运行后错误提示如下：
java.lang.NumberFormatException: null
java.lang.Integer.parseInt(Integer.java:415)
java.lang.Integer.<init>(Integer.java:620)
org.apache.jsp.member.member_jsp._jspService(member_jsp.java:94)
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)
帮忙给解决一下：在线等待中。
