[英]while passing a date from jsp page to servlet instead of passing a proposed date sysdate is passing
[英]passing date from jsp to servlet using getParameterValues
我在servlet中有错误从JSP传递值..
JSP代码:
<table>
<tr>
<td>Day</td>
<td>Start</td>
<td>End</td>
<td>Date</td>
<td> </td>
</tr>
<tr>
<td><select name="availableDay">
<!--Listing days-->
</select></td>
<td><input type="time" name="availableStart"/></td>
<td><input type="time" name="availableEnd"/></td>
<td><input type="date" name="availableDate" /></td>
<td><input type="button" class="add" name="action" value="Add More"</td>
</tr>
</table>
我想将availableDate
传递给servlet。 Fyi,JSP中的行是动态生成的。 因此,我通过使用[]
。 我的servlet代码:
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
String[] presentationID = request.getParameterValues("selectavailability");
String[] availableDay = request.getParameterValues("availableDay");
String[] availableStart = request.getParameterValues("availableStart");
String[] availableEnd = request.getParameterValues("availableEnd");
String[] availableDate = request.getParameterValues("availableDate");
SimpleDateFormat availDate = new SimpleDateFormat("dd-MM-yyyy");
Date chosenDate = availDate.parse(availableDate);// THIS IS WHERE I AM GETTING ERROR
try {
if(availableDay != null && availableStart != null && availableEnd != null)
{
for (int i = 0; i < availableDay.length; i++)
{
AvailabilityBean available = new AvailabilityBean();
available.setLecturerID(request.getParameter("lecturerID"));
available.setAvailableDay(availableDay[i]);
available.setAvailableStart(availableStart[i]);
available.setAvailableEnd(availableEnd[i]);
available.setAvailableDate(availableDate[i]); //EFFECTED THIS LINE TOO
available = AddAvailableDAO.addavailable(available);
}
}
}
response.sendRedirect("addAvailability.jsp");
}
catch (Throwable theException) {
System.out.println("hhhhhhh"+theException);
}
}
对于额外的,AvailabilityBean:
private String availableID;
private String lecturerID;
private String availableDay;
private String availableStart;
private String availableEnd;
private Date availableDate;
private String presentationID;
错误: incompatible types: String[] cannot be converted to String.
你能告诉我我的错误在哪里吗? 我该如何解决这个问题? 谢谢
这是您的availableDate
变量,它是一个String
数组。
String[] availableDate = request.getParameterValues("availableDate");
现在,您正在使用SimpleDateFormat
类将String
数据格式化为Date
。
这里parse(String text)
将采用String
Argument而不是String[]
(Array)的类型。
SimpleDateFormat availDate = new SimpleDateFormat("dd-MM-yyyy");
Date chosenDate = availDate.parse(availableDate);// availableDate is a String Array not a String.
因此,它会引发compile-time
错误incompatible types: String[] cannot be converted to String.
你应该试试这个
Date chosenDate = availDate.parse(availableDate[0]); //preferred index you may pass as per your requirement.
注意 : -
availableDate[0]
将返回索引0
处可用的String
对象。
这是您的JSP代码示例..
<td><select name="availableDay"> //only one value will get selected so. use getParameterValue() for this field too.
<!--Listing days-->
</select></td>
//this will return only a String not a String[] . So use getParameterValue();
<td><input type="time" name="availableStart"/></td>
//this will also return only a String not a String[] . So use getParameterValue();
<td><input type="time" name="availableEnd"/></td>
//this too will return only a String not a String[] . So use getParameterValue();
<td><input type="date" name="availableDate" /></td> //this too will return a String with getParameterValue();
所以,试试这个..代码。
String availableDay = request.getParameter("availableDay");
String availableStart = request.getParameter("availableStart");
String availableEnd = request.getParameter("availableEnd");
String availableDate = request.getParameter("availableDate");
而不是这一个。
String[] availableDay = request.getParameterValues("availableDay");
String[] availableStart = request.getParameterValues("availableStart");
String[] availableEnd = request.getParameterValues("availableEnd");
String[] availableDate = request.getParameterValues("availableDate");
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