我正在开发一个Web应用程序，我有一个jsp页面，其中有一个表格和其他一些东西。我想要的只是每5秒刷新一次表格的内容。下面是我的jsp页面代码。任何人都可以吗帮我解决我的问题。
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<%@ page language="java" %>
<%@ page import="java.sql.*" %>
<%@ page import="java.util.Calendar" %>
<%@ page import="java.text.DateFormat" %>
<%@ page import="java.util.Date" %>
<%@ page import="java.text.SimpleDateFormat" %>
<HTML>
<HEAD>
<TITLE>Welcome to Crevavi </TITLE>
</HEAD>
<div style="width:950px; height:900; padding:10px; border:10px ridge black;">
<body bgcolor="white"; border="3px">
<img src="Crevavi_Plain.jpg" background-color="white" width="100" height="25" style=float:right;/>
<h1 style=margin-left:2px;><font size="5"> Crevavi Web Application</font></h1>
<hr color="black">
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script>
var auto = setInterval( function ()
{
$("#result").load("NewTable.html #result");
}, 5000); // refresh every 5000 milliseconds
</script>
//I want only the below division to refresh every 5 seconds.
<div id="result" style="width:930px; height:500; padding:5px; border:5px ridge black;">
<%
int rowCount = 0;
/*Calendar cal = Calendar.getInstance();
Date date1=cal.getTime();
DateFormat dateFormat = new SimpleDateFormat("dd/MM/yy,HH:mm:ss");
String formattedDate=dateFormat.format(date1);
System.out.println("Current time of the day using Calendar - 24 hour format: "+ formattedDate);
String[] values = formattedDate.split(",");
String date = values[0];
String time = values[1];*/
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/students","root","root");
Statement statement = connection.createStatement() ;
/* String sql = "INSERT INTO TEXTDATA (MachID,Date,Time,Text1,Text2,Text3,Text4,Text5,Text6,Text7,Text8,Text9,Text10,Text11,Text12) VALUES ('123','"+date+"','"+time+"','My','hello','thankyou','welcome','visit again','haha','good morning','sweet dreams','hi','hello','night','work')";
((java.sql.Statement) statement).executeUpdate(sql);*/
ResultSet resultset = statement.executeQuery("select * from textdata order by Date desc, Time desc");
while(resultset.next()){
rowCount++;
}
int firstrow = rowCount-10;
System.out.println(firstrow);
if(rowCount > 10){
resultset = statement.executeQuery("select * from textdata where Rowcount>'"+firstrow+"' order by Date desc, Time desc");
}else{
resultset = statement.executeQuery("select * from textdata order by Date desc, Time desc");
}
%>
<TABLE BORDER="1">
<TR>
<TH>Mach ID</TH>
<TH>Date</TH>
<TH>Time</TH>
<TH>Text1</TH>
<TH>Text2</TH>
<TH>Text3</TH>
<TH>Text4</TH>
<TH>Text5</TH>
<TH>Text6</TH>
<TH>Text7</TH>
<TH>Text8</TH>
<TH>Text9</TH>
<TH>Text10</TH>
<TH>Text11</TH>
<TH>Text12</TH>
</TR>
<% while(resultset.next()){ %>
<TR>
<TD> <%= resultset.getInt(1) %></td>
<TD> <%= resultset.getString(2) %></TD>
<TD> <%= resultset.getString(3) %></TD>
<TD> <%= resultset.getString(4) %></TD>
<TD> <%= resultset.getString(5) %></TD>
<TD> <%= resultset.getString(6) %></TD>
<TD> <%= resultset.getString(7) %></TD>
<TD> <%= resultset.getString(8) %></TD>
<TD> <%= resultset.getString(9) %></TD>
<TD> <%= resultset.getString(10) %></TD>
<TD> <%= resultset.getString(11) %></TD>
<TD> <%= resultset.getString(12) %></TD>
<TD> <%= resultset.getString(13) %></TD>
<TD> <%= resultset.getString(14) %></TD>
<TD> <%= resultset.getString(15) %></TD>
</TR>
<% } %>
</TABLE>
</div>
</br>
<form name = "Field_Details" action = "ServletApp" method= "get">
<fieldset style="float: center; width:900px; height: 75px;background-color:ivory; border-color:black;">
<font size = "2">Output Field :</font> <input type="text" name="Text1" maxlength="50" style="height:15px; width:100px; border-color:black"><font size = "2"></font>
<font size = "2"> MachId :</font> <input type="text" name="Text2" maxlength="15" style="height:15px; width:100px; border-color:black"><font size = "2"></font>
<font size = "2"> From Date(dd/mm/yy) :</font> <input type="text" name="Text3" maxlength="8" style="height:15px; width:100px; border-color:black"><font size = "2"></font>
<font size = "2"> To Date(dd/mm/yy) :</font> <input type="text" name="Text4" maxlength="8" style="height:15px; width:100px; border-color:black"><font size = "2"></font><br><br>
<input type= "submit" value="Send" style="height:30px; width:80px; margin-left:15px">
<input type= "submit" value="Search" style="height:30px; width:80px; margin-left:700px" onclick="form.action='FirstServlet';">
</BODY>
</HTML>
最佳答案
JSP 是一种服务器端技术，这意味着如果您想刷新页面，您必须向服务器发出请求，服务器将返回新页面。通过正常的 JSP 机制不可能只返回页面的一部分。
如果您只想刷新表格，则需要使用 JavaScript 对服务器进行 ajax 调用以获取所需的数据，并使用此数据重新填充表格。
关于java - jsp页面如何只刷新一个分区，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/35452932/