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。