Web 开发
java.lang.NumberFormatException: null
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我也要 关注 + 加入社区当jsp页面中的该代码提交
到了
报出异常
具体指向了
但是我在编写的时候 没有出错的啊 怎么回事呢?
<form name="pagination" action="PagInationServlet" method="post">
<input type="hidden" name="result1" value="${requestScope.result1}">
<input type="hidden" name="result2" value="${requestScope.result2}">
<input type="hidden" name="result3" value="${requestScope.result3}">
<select name="pageForm" onchange="choosePageIndex()">
<c:forEach items="${requestScope.listPage}" var="page">
<option value="${page }" >${page }</option>
</c:forEach>
</select>
</form>到了
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String result1 = request.getParameter("result1");
String result2 = request.getParameter("result2");
String result3 = request.getParameter("result3");
lastZxBean lastZx = new lastZxBean();
String temp = request.getParameter("choosePageIndex");
Integer temp2 = Integer.valueOf(temp);
int choosePageIndex = temp2.intValue();
List list = lastZx.query(choosePageIndex);
request.setAttribute("objResult", list);
request.setAttribute("result1", result1);
request.setAttribute("result2", result2);
request.setAttribute("result3", result3);
request.getRequestDispatcher("jsps/list.jsp").forward(request, response);
}报出异常
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:415)
at java.lang.Integer.valueOf(Integer.java:553)
at com.xindun.controller.PagInationServlet.doGet(PagInationServlet.java:55)
at com.xindun.controller.PagInationServlet.doPost(PagInationServlet.java:79)具体指向了
String temp = request.getParameter("choosePageIndex");
Integer temp2 = Integer.valueOf(temp);
int choosePageIndex = temp2.intValue();但是我在编写的时候 没有出错的啊 怎么回事呢?
...全文
