package cn.edu.ujn.servlet;
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.edu.ujn.beans.Message;
@SuppressWarnings("serial")
public class ListServlet extends HttpServlet {
private static String driver = "com.mysql.jdbc.Driver";
private static String url = "jdbc:mysql://localhost:3306/wechat";
private static String username = "root";
private static String password = "root";
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
try {
String command = req.getParameter("command");
String description = req.getParameter("description");
req.setAttribute("command", command);
req.setAttribute("description", description);
Class.forName(driver);
Connection conn = DriverManager.getConnection(url, username, password);
StringBuilder sql = new StringBuilder("select id,command,description,content from message where 1=1");
List<String> paramList = new ArrayList<String>();
if (command!=null && !"".equals(command.trim())) {
sql.append(" and command=?");
paramList.add(command);
}
if (description!=null && !"".equals(description.trim())) {
sql.append(" and description like '%' ? '%'");
paramList.add(description);
}
PreparedStatement ps = conn.prepareStatement(sql.toString());
for(int i=0;i<paramList.size();i++) {
ps.setString(i+1, paramList.get(i));
}
ResultSet rs = ps.executeQuery();
List<Message> messageList = new ArrayList<Message>();
while(rs.next()) {
Message message = new Message();
message.setId(rs.getInt("id"));
message.setCommand(rs.getString("command"));
message.setDescription(rs.getString("description"));
message.setContent(rs.getString("content"));
messageList.add(message);
}
req.setAttribute("messageList", messageList);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
req.getRequestDispatcher("WEB-INF/jsp/list.jsp").forward(req, resp);
}
//<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
this.doGet(req, resp);
}
}
JSP
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<meta http-equiv="X-UA-Compatible"content="IE=9; IE=8; IE=7; IE=EDGE" />
<title>内容列表页面</title>
<link href="<%=basePath %>rescource/css/all.css" rel="stylesheet" type="text/css" />
</head>
<body style="background: #e1e9eb;">
<form action="<%=basePath %>list.action" id="mainForm" method="post">
<div class="right">
<div class="current">当前位置：<a href="javascript:void(0)" style="color:#6E6E6E;">内容管理</a> > 内容列表</div>
<div class="rightCont">
<p class="g_title fix">内容列表 <a class="btn03" href="#">新 增</a> <a class="btn03" href="#">删 除</a></p>
<table class="tab1">
<tbody>
<tr>
<td width="90" align="right">指令语句：</td>
<td>
<input name="command" type="text" class="allInput" value="${command }"/>
</td>
<td width="90" align="right">描述：</td>
<td>
<input name="description" type="text" class="allInput" value="${description }"/>
</td>
<td width="85" align="right"><input type="submit" class="tabSub" value="查 询" /></td>
</tr>
</tbody>
</table>
<div class="zixun fix">
<table class="tab2" width="100%">
<tbody>
<tr>
<th><input type="checkbox" id="all" onclick="#"/></th>
<th>序号</th>
<th>指令</th>
<th>描述</th>
<th>内容</th>
<th>操作</th>
</tr>
<c:forEach items="${messageList}" var="message" varStatus="status">
<tr <c:if test="${status.index%2!=0 }">style="background-color:#ECF6EE;"</c:if>>
<td><input type="checkbox" /></td>
<td>${status.index+1}</td>
<td>${message.command }</td>
<td>${message.description }</td>
<td>${message.content}</td>
<td>
<a href="#">修改</a>
<a href="#">删除</a>
</td>
</tr>
</c:forEach>
</tbody>
</table>
<div class='page fix'>
共 <b>4</b> 条
<a href='###' class='first'>首页</a>
<a href='###' class='pre'>上一页</a>
当前第<span>1/1</span>页
<a href='###' class='next'>下一页</a>
<a href='###' class='last'>末页</a>
跳至 <input type='text' value='1' class='allInput w28' /> 页
<a href='###' class='go'>GO</a>
</div>
</div>
</div>
</div>
</form>
</body>
</html>
大咪