您好,我是一名对Servlet环境比较新的人。我正在尝试使用以下方式向我的Servlet提交表单:
<form action="OnlineExam?q=saveQuestion" method="post" enctype="multipart/form-data">
<fieldset>
<legend>Question</legend>
<textarea class="questionArea" id="question" name="question">Enter Question.</textarea>
<br class="clearFormatting"/>
Attach File<input type="file" name="file" />
<input class="optionsInput" value="Option A" name="A" onfocus = "clearValues('A')" onblur = "setValues('A')"/>
<br class="clearFormatting"/>
<input class="optionsInput" value="Option B" name="B" onfocus = "clearValues('B')" onblur = "setValues('B')"/>
<br class="clearFormatting"/>
<input class="optionsInput" value="Option C" name="C" onfocus = "clearValues('C')" onblur = "setValues('C')"/>
<br class="clearFormatting"/>
<input class="optionsInput" value="Option D" name="D" onfocus = "clearValues('D')" onblur = "setValues('D')"/>
<br/>
<input type="submit" value="Save" />
<input type="reset" value="Cancel" />
<button style="display: none" onclick="return deleteQuestion()" >Delete</button>
</fieldset>
</form>
这个servlet大致是这样的:
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
if(request.getParameter("q").equals("saveQuestion")){
saveQuestion(request);
}
}
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
doGet(request, response);
}
public void saveQuestion(HttpServletRequest request){
Enumeration enum = request.getParameterNames();
while (enum.hasMoreElements()) {
String pName = (String) enum.nextElement();
String[] pValues = request.getParameterValues(pName);
System.out.print("<b>"+pName + "</b>: ");
for (int i=0;i<pValues.length;i++) {
System.out.print(pValues[i]);
}
out.print("<br>");
}
}
但它只打印了q参数,而没有其他表单字段。
我也尝试使用request.getParameter("question")来获取它们,但这也不起作用。那么我错在哪里了?实际上,我来自PHP背景,最近开始用Java编码,请帮忙。
提前感谢。