Jquery 如何通过ajax重新加载数据
可能重复：Jquery 如何通过ajax重新加载数据,jquery,ajax,database,servlets,Jquery,Ajax,Database,Servlets,可能重复： 我有以下代码： public class IndexServlet extends HttpServlet { MoodService moodService; public IndexServlet() { moodService = new MoodService(); } /** * Accepts the request and sends it to the dispatcher which takes th
我有以下代码：
public class IndexServlet extends HttpServlet {
MoodService moodService;
public IndexServlet() {
moodService = new MoodService();
}
/**
* Accepts the request and sends it to the dispatcher which takes the database data and presents it as HTML
*/
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
List<Mood> moodList = moodService.findLastMoods(25); //my way of getting data from database
req.setAttribute("moodList", moodList);
RequestDispatcher requestDispatcher =req.getRequestDispatcher("index.jsp");
requestDispatcher.forward(req, resp);
}
}
公共类IndexServlet扩展了HttpServlet{
情绪服务情绪服务；
公共IndexServlet（）{
moodService=新的moodService（）；
}
/**
*接受请求并将其发送给dispatcher，dispatcher接收数据库数据并将其显示为HTML
*/
@凌驾
受保护的void doGet（HttpServletRequest-req，HttpServletResponse-resp）抛出ServletException，IOException{
List moodList=moodService.findLastMoods（25）；//我从数据库获取数据的方法
请求setAttribute（“moodList”，moodList）；
RequestDispatcher RequestDispatcher=req.getRequestDispatcher（“index.jsp”）；
转发（req，resp）；
}
}
<html>
<head>
<title>Previous 25 entries:</title>
<style type="text/css">
#container {width:1200px; margin-left:auto; margin-right: auto;}
#tableheader {width:900px; text-align: center;}
.field {text-align:center; width:300px;}
</style>
</head>
<body style="background-color: black;">
<div id="container">
<table border="1" bordercolor="#FFCC00" width="900" height="80" cellpadding="3" cellspacing="3" style="border-top-left-radius: 15px; border-top-right-radius: 15px; text-align: center; margin-left:auto; margin-right: auto; background-color:#FFFFCC; font-size: 33px; font-family: Monotype Corsiva ">
<tr>
<td style="border-top-left-radius: 10px; border-top-right-radius: 10px;">PREVIOUS 25 ENTRIES:</td>
</tr>
</table>
<%
List<Mood> moodList = (List<Mood>) request.getAttribute("moodList");
for (Mood mood : moodList) {
Integer a = mood.getMoodId();
String moodId = new String();
switch (a) {
case 1:
moodId = "Happy";
break;
case 2:
moodId = "Sad";
break;
case 3:
moodId = "Lonely";
break;
case 4:
moodId = "Angry";
break;
case 5:
moodId = "In Love";
break;
case 6:
moodId = "Content";
break;
} %>
<table id="table" border="1" bordercolor="#FFCC00" width="900" cellpadding="3" cellspacing="3" style="text-align: center; margin-left:auto; margin-right: auto; background-color:#FFFFCC;">
<tr>
<td class="field"> <%=mood.getUserId()%></td>
<td class="field"> <%=moodId%></td>
<%Date date = new Date(mood.getTime());
SimpleDateFormat sdf = new SimpleDateFormat("dd:MM:yyyy hh:mm:ss");
String sDate = sdf.format(date);
%>
<td class="field"> <%=sDate%></td>
</tr>
</table>
<%
}
%>
</div>
</body>
</html>
前25项：
#容器{宽度：1200px；左边距：自动；右边距：自动；}
#表格标题{宽度：900px；文本对齐：居中；}
.field{文本对齐：中心；宽度：300px；}
前25项：
谢谢你的帮助！：） 我建议您看看这本非常简单实用的教程：
您需要三件事：