小弟我的这个代码取不到数据 而且回来的页面全是问号 咋回事！
日期：2014-05-20 浏览次数：20831 次
我的这个代码取不到数据 而且回来的页面全是问号 怎么回事！！！
- Java code
<%@ page language="java" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
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>
<base href="<%=basePath%>" />
<meta http-equiv="content-type" content="text/html; charset=utf8">
<link rel="stylesheet" type="text/css" href="css/manageRecord.css">
<script language="javascript" src="js/calendar.js"></script>
</head>
<body>
<form action="ManageRecord.do" method="post">
<div class="all">
<span class="title">聊天记录管理</span>
<div class="content">
选择客服：
<input type="text" name="chatId">
<br>
对话时间：
<input type="text" name="time1" id="time1"
onclick="MyCalendar.SetDate(this)" />
至
<input type="text" name="time1" id="time2"
onclick="MyCalendar.SetDate(this)">
<br />
<input type="submit" value="查询" style="margin-top: 15px;">
</div>
<div class="count">
<div id="c1">
<table width="800" border="1">
<tr>
<th>
客服名称
</th>
<th>
聊天内容
</th>
<th>
聊天日期
</th>
</tr>
<tbody>
<c:forEach items="${chatRecords}" var="chatRecord">
<tr>
<td>
${chatRecord.serverName }
</td>
<td>
${chatRecord.chatContent }
</td>
<td>
${chatRecord.chatCreateTime }
</td>
</tr>
</c:forEach>
</tbody>
</table>
</div>
<div class="c2">
<input type="checkbox" />
全选
<input type="button" value="删除" />
</div>
</div>
</div>
</form>
</body>
</html>
package servlet;
import java.io.IOException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import entity.ChatRecord;
import bo.ChatRecordBo;
public class ManageRecord extends HttpServlet {
private static final long serialVersionUID = -8402572450669973831L;
private ChatRecordBo chatRecordBo = ChatRecordBo.getInstance();
public ManageRecord() {
super();
}
public void destroy() {
super.destroy();
}
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setContentType("text/plain");
int chatId = Integer.parseInt(request.getParameter("chatId"));
String time1 = request.getParameter("time1");
String time2 = request.getParameter("time2");
List<ChatRecord> chatRecords = chatRecordBo.getRecords(chatId, time1,
time2);
response.getWriter().print(chatRecords);
if (chatRecords != null) {
request.setAttribute("list", chatRecords);
request.getRequestDispatcher("/adminFunction/manageRecord.jsp")
.forward(request, response);
} else {
response.sendRedirect("/index.jsp");
}
}
public void init() throws ServletException {
}
}
package dao;
import java.sql.Connection;
import java.util.Date;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import db.DBConnection;
import entity.ChatRecord;
public class ChatRecordDao {
private ChatRecordDao() {
}
private static ChatRecordDao instance;
public static ChatRecordDao getInstance() {
if (instance == null) {
instance = new ChatRecordDao();
}
return instance;
}
public List<ChatRecord> getChatRecords(int chatId, String chatCreateTime1,
String chatCreateTime2) {
ArrayList<ChatRecord> chatRecords = new ArrayList<ChatRecord>();
String sql = "select * from chatRecord where chatId = ? and chatCreateTime between ? and ?";
Connection conn = DBConnection.getConn();
PreparedStatement pstmt = null;
ResultSet rs = null;
try {
pstmt = conn.prepareStatement(sql);
pstmt.setInt(1, chatId);
pstmt.setString(2, chatCreateTime1);
pstmt.setString(3, chatCreateTime2);
rs = pstmt.executeQuery();
while (rs.next()) {
ChatRecord chatRecord = new ChatRecord();
chatRecord.setChatId(rs.getInt(1));
chatRecord.setServerName(rs.getString(2));
chatRecord.setChatContent(rs.getString(3));
chatRecord.setChatCreateTime(rs.getDate(4));
chatRecords.add(chatRecord);
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
DBConnection.closeAll(rs, pstmt, conn);
}
return chatRecords;
}
}
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