地址栏上面可以看到begin在增加,http://localhost:9999/testJSTL4/page.do?begin=24
为什么表格不刷新呢?
<body>
<% List weekWeather = new ArrayList(); %>
<%
test.WeekWeather m_ww = new test.WeekWeather();
%>
<% weekWeather=m_ww.list; %>
<% request.setAttribute("weekWeather",weekWeather);
int m_begin = Integer.parseInt(request.getParameter("begin"));
request.setAttribute("begin2",m_begin);
%>
<c:set var="listSize" value="${fn:length(weekWeather)}"></c:set>
<c:set var="pageSize" value="4"></c:set>
<c:set var="begin2" value="${param.begin2}"></c:set>
<c:set var="pageEnd" value="${pageBegin+pageSize-1}"></c:set><c:if test="${(listSize gt pageSize) and (pageEnd lt listSize)}">
<a href='<c:url value="/page.do">
<c:param name="begin" value="${begin+pageSize}"/>
</c:url>'>
next
</a>
</c:if><table border="2">
<TR>
<TH>星期</TH>
<TH>百分比</TH>
</TR>
<c:forEach var="weather" items="${weekWeather}"
begin="${begin2}" end="${pageEnd}">
<tr>
<TD><c:out value="${weather.item}"/></TD>
<TD><c:out value="${weather.percent}"/></TD>
</tr>
</c:forEach>
</table>
为什么表格不刷新呢?
<body>
<% List weekWeather = new ArrayList(); %>
<%
test.WeekWeather m_ww = new test.WeekWeather();
%>
<% weekWeather=m_ww.list; %>
<% request.setAttribute("weekWeather",weekWeather);
int m_begin = Integer.parseInt(request.getParameter("begin"));
request.setAttribute("begin2",m_begin);
%>
<c:set var="listSize" value="${fn:length(weekWeather)}"></c:set>
<c:set var="pageSize" value="4"></c:set>
<c:set var="begin2" value="${param.begin2}"></c:set>
<c:set var="pageEnd" value="${pageBegin+pageSize-1}"></c:set><c:if test="${(listSize gt pageSize) and (pageEnd lt listSize)}">
<a href='<c:url value="/page.do">
<c:param name="begin" value="${begin+pageSize}"/>
</c:url>'>
next
</a>
</c:if><table border="2">
<TR>
<TH>星期</TH>
<TH>百分比</TH>
</TR>
<c:forEach var="weather" items="${weekWeather}"
begin="${begin2}" end="${pageEnd}">
<tr>
<TD><c:out value="${weather.item}"/></TD>
<TD><c:out value="${weather.percent}"/></TD>
</tr>
</c:forEach>
</table>
package servlet;
import java.io.IOException;import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;public class pageServlet extends HttpServlet { @Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
// TODO Auto-generated method stub
int begin = Integer.parseInt(req.getParameter("begin"));
req.setAttribute("begin", begin++);
RequestDispatcher rdcher=req.getRequestDispatcher("/show.jsp");
rdcher.forward(req,resp);
} /**
* Constructor of the object.
*/
public pageServlet() {
super();
}}
<%=m_begin%>的时候,打印出来的begin的值还是增加的!<%@ page language="java" import="java.util.*,test.WeekWeather" pageEncoding="gbk"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%@ taglib prefix="sql" uri="http://java.sun.com/jstl/sql_rt" %>
<%@taglib uri="http://java.sun.com/jstl/fmt_rt" prefix="fmt"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions"prefix="fn"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head> <body>
<% List weekWeather = new ArrayList(); %>
<%
test.WeekWeather m_ww = new test.WeekWeather();
%>
<% weekWeather=m_ww.list; %>
<% request.setAttribute("weekWeather",weekWeather);
int m_begin = Integer.parseInt(request.getParameter("begin"));
request.setAttribute("begin2",m_begin);
%>
<%=m_begin%>
<c:set var="listSize" value="${fn:length(weekWeather)}"></c:set>
<c:set var="pageSize" value="4"></c:set>
<c:set var="begin2" value="${param.begin2}"></c:set>
<c:set var="pageEnd" value="${begin2+3}"></c:set><c:if test="${(listSize gt pageSize) and (pageEnd lt listSize)}">
<a href='<c:url value="/page.do">
<c:param name="begin" value="${begin+pageSize}"/>
</c:url>'>
next
</a>
</c:if><table border="2">
<TR>
<TH>星期</TH>
<TH>百分比</TH>
</TR>
<c:forEach var="weather" items="${weekWeather}"
begin="${begin2}" end="${begin2+3}">
<tr>
<TD><c:out value="${weather.item}"/></TD>
<TD><c:out value="${weather.percent}"/></TD>
</tr>
</c:forEach>
</table>
</body>
</html>
<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt" %>
<%@ taglib prefix="sql" uri="http://java.sun.com/jstl/sql_rt" %>
<%@taglib uri="http://java.sun.com/jstl/fmt_rt" prefix="fmt"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions"prefix="fn"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head> <body>
<% List weekWeather = new ArrayList(); %>
<%
test.WeekWeather m_ww = new test.WeekWeather();
%>
<% weekWeather=m_ww.list; %>
<% request.setAttribute("weekWeather",weekWeather);
int m_begin = Integer.parseInt(request.getParameter("begin"));
request.setAttribute("m_begin",m_begin);
%>
<%=m_begin%>
<c:set var="listSize" value="${fn:length(weekWeather)}"></c:set>
<c:set var="pageSize" value="4"></c:set>
<c:set var="begin2" value="${param.m_begin}"></c:set>
<c:set var="pageEnd" value="${begin2+3}"></c:set>
<table border="2">
<TR>
<TH>星期</TH>
<TH>百分比</TH>
</TR>
<c:forEach var="weather" items="${weekWeather}"
begin="${begin2}" end="${begin2+3}">
<tr>
<TD><c:out value="${weather.item}"/></TD>
<TD><c:out value="${weather.percent}"/></TD>
</tr>
</c:forEach>
</table>
</body>
</html>
我把jsp的代码精简了一下,去掉了next,可是还是不刷新