BlogJava-奥运和我-文章分类-JSP程序开发范例宝典http://www.blogjava.net/olympics/category/22457.htmlzh-cnTue, 15 May 2007 04:42:05 GMTTue, 15 May 2007 04:42:05 GMT602章 表单及表单元素的应用http://www.blogjava.net/olympics/articles/117466.htmlolympicsolympicsMon, 14 May 2007 16:08:00 GMThttp://www.blogjava.net/olympics/articles/117466.htmlhttp://www.blogjava.net/olympics/comments/117466.htmlhttp://www.blogjava.net/olympics/articles/117466.html#Feedback0http://www.blogjava.net/olympics/comments/commentRss/117466.htmlhttp://www.blogjava.net/olympics/services/trackbacks/117466.html
填写文本框/编辑框/隐藏域的值：
<form   name="form"   methord="post"   action="dealwith.jsp">
   文本框：<input   name="textOne"   type="text">
   编辑框：<textarea   name="textTwo"   cols="30"   row="8"></textarea>
   隐藏值：<input   name="textThree"   type="hidden"   value="男">
</form>

获取文本框/编辑框/隐藏域的值：
   <%=request.getParameter("textOne")%>
   <%=request.getParameter("textTwo")%>
   <%=request.getParameter("textThree")%>


例20   获取下拉列表/菜单的值

选择下拉列表/菜单的值

<script language="javascript" type="">
function checkEmpty(form){
for(i=0;i<form.length;i++){
if(form.elements[i].value==""){
alert("表单信息不能为空");
return false;
}
}
}
</script>

<form name="form" method="post" action="dealwith.jsp" onSubmit="return checkEmpty(form)">
   选择图书
         <select   name="select">
            <option   value="">请选择</option>
            <option   value="jsp开发手册"> jsp开发手册   </option>
            <option   value="jsp技术大全"> jsp技术大全   </option>
            <option   value="jsp宝典"> jsp宝典   </option>
         </select>
</form>


获取下拉列表/菜单的值
<%=request.getParameter("select")%>

 
例21   获取复选框值

复选框：

<script   language="javascript"   type="">
function   checkEmpty(form)   {
   for   (i=0;i<form.length;i++){
      if (form.elements[i].value = = ""){
         alert("不能为空");
         return false;
      }
   }
}
</script>

<%
String   bookType[]   =   {"科技图书","教育图书","文学图书","医学图书","法律图书"};
int   number   =   bookType.length;
%>

 <form   name="form"   method="post"   action="dealwith.jsp"   onSubmit="return checkEmpty(form)">

   选择书籍：
      <%
           for   (int   i=0;   i<bookType.length;   i++)   {
         %>
               <input   type="checkbox"   name="name<%=i%>"   value="<%=bookType[i] %>"  >
               <%=bookType[i]%>
         <% } %>

   <input type="hidden"   name="number"   value="<%=bookType.length%>" >
 <input   type="submit"   name="Submit"   value="提交">

</form>


获取复选框的值

<%
int number=Integer.parseInt(request.getParameter("number"));
%>
您选择为：

<%
for(int i=0;i<number;i++){
  String name="name"+i;
  if(request.getParameter(name)!=null){
%>

<%=request.getParameter(name)%>
<%}}%>


例22   获取单选按钮的值

单选按钮：

<%
String book[]={"非常好","很好","一般好","很差","非常差"};
int number=book.length;
%>

<form name="form" method="post" action="dealwith.jsp" onSubmit="return checkEmpty(form)">
   请选择您本书的满意程度：
      <%
      for(int i=0;i<book.length;i++){
      %>
            <input type="radio" name="name" value="<%=book[i]%>">
             <%=book[i]%>
         <%}%>

    <input type="submit" name="Submit" value="提交">
</form>


获取单选按钮的值

您选择为：
                  <%=request.getParameter("name")%>





















olympics 2007-05-15 00:08 发表评论
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