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:不兼容的类型:String []无法转换为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
最佳答案 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.
这里解析(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,它会引发编译时错误不兼容的类型:String []无法转换为String.
你应该试试这个
Date chosenDate = availDate.parse(availableDate[0]); //preferred index you may pass as per your requirement.
Note:-
availableDate[0]
will return aString
Object available at index0
.