Jsp连接数据库登陆和循环显示数据

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JSP 粗浅

index

<%@page import="cn.jbit.entity.News"%>
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="utf-8"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>新闻中国</title>
<link href="CSS/main.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="header">
  <div id="top_login">
  <form name="form1" method="post" action="util/doLogin.jsp" onsubmit="return check()">
    <label> 登录名 </label>
    <input type="text" id="uname" value="" name="uname" class="login_input" />
    <label> 密&#160;&#160;码 </label>
    <input type="password" id="upwd" value="" name="pwd" class="login_input" />
    <input type="submit" class="login_sub" value="登录" onclick="login()"/>
    <label id="error"> </label>
    <img src="Images/friend_logo.gif" alt="Google" id="friend_logo" />
    <script type="text/javascript">
    	function check(){
    		var uname = document.getElementById("uname");
    		var upwd = document.getElementById("upwd");
    		if("" == uname.value){
    			alert("用户名不能为空！");
    			return false;
    		}else if("" == upwd.value){
    			alert("密码不能为空");
    			return false;
    		}
    		return true;
    	}
    </script>
  </form>  
  </div>
  <div id="nav">
    <div id="logo"> <img src="Images/logo.jpg" alt="新闻中国" /> </div>
    <div id="a_b01"> <img src="Images/a_b01.gif" alt="" /> </div>
    <!--mainnav end-->
  </div>
</div>
<div id="container">
<%!
	public List<News> queryNewsInfo(String sql, Object []param){
		List<News> list = new ArrayList<News>();
		// 数据库驱动字符串
		String driver = "oracle.jdbc.driver.OracleDriver";
		// 连接URL字符串
		String url = "jdbc:oracle:thin:@localhost:1521:oracle10";
		// 数据库用户名
		String user = "news";
		// 用户密码
		String password = "accp";
	
		Connection conn = null;
		PreparedStatement pstmt = null;
		ResultSet rs = null;
	
		// 获取连接并捕获异常
		try {
			// 加载驱动
			Class.forName(driver);
			// 获取数据库连接
			conn = DriverManager.getConnection(url, user, password);		
			pstmt = conn.prepareStatement(sql);	
			
			if(param != null){
				for(int i=0; i<param.length; i++){
					pstmt.setObject(i+1,param[i]);
				}
			}
			rs = pstmt.executeQuery();
			// 执行数据库命令		
			while(rs.next()) {		
				News item = new News();
				item.setNtitle(rs.getString(1));
				item.setNauthor(rs.getString(2));
				list.add(item);
			}
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} catch (SQLException e) {
			e.printStackTrace();
		} finally {
			// 若结果集对象不为空，则关闭
			if (rs != null) {
				try {
					rs.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
	
			// 若PreparedStatement对象不为空，则关闭
			if (pstmt != null) {
				try {
					pstmt.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
	
			// 若数据库连接对象不为空，则关闭
			if (conn != null) {
				try {
					conn.close();
				} catch (SQLException e) {
					e.printStackTrace();
				}
			}
		}
		return list;
	}
%>
 </div>
</body>
</html>

admin

<%@page import="cn.jbit.entity.News"%>
<%@ page language="java" import="java.util.*,java.sql.*" pageEncoding="utf-8"%>
<%@ include file="element/control.jsp" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK" />
<title>添加主题--管理后台</title>
<link href="CSS/admin.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="header">
  <div id="welcome">欢迎使用新闻管理系统！</div>
  <div id="nav">
    <div id="logo"><img src="Images/logo.jpg" alt="新闻中国" /></div>
    <div id="a_b01"><img src="Images/a_b01.gif" alt="" /></div>
  </div>
</div>
<div id="admin_bar">
  <div id="status">管理员： 
 	<%
 	 String str="";
 	 //for(Cookie cookie : request.getCookies()){
 	 	//if(cookie.getName().equals("uName")){
 	 		//str=cookie.getValue();
 	 	//}
 	 //}
 	 str = session.getAttribute("uName").toString();
 	 
 	 %> 
 	 <%=str %>
  登录  &#160;&#160;&#160;&#160; <a href="#">login out</a></div>
  <div id="channel"> </div>
</div>
<div id="main">
  <div id="opt_list">
    <ul>
      <li><a href="#">添加新闻</a></li>
      <li><a href="#">编辑新闻</a></li>
      <li><a href="#">查找新闻</a></li>
      <li><a href="#">添加主题</a></li>
      <li><a href="#">编辑主题</a></li>
    </ul>
  </div>
  <div id="opt_area">    
    <script language="javascript">
	function clickdel(){
		return confirm("删除请点击确认");
	}
	
</script>

	<%	
	List<News> list = new ArrayList<News>();
	// 数据库驱动字符串
	String driver = "oracle.jdbc.driver.OracleDriver";
	// 连接URL字符串
	String url = "jdbc:oracle:thin:@localhost:1521:oracle10";
	// 数据库用户名
	String user = "news";
	// 用户密码
	String password = "accp";

	Connection conn = null;
	PreparedStatement pstmt = null;
	ResultSet rs = null;

	// 获取连接并捕获异常
	try {
		// 加载驱动
		Class.forName(driver);
		// 获取数据库连接
		conn = DriverManager.getConnection(url, user, password);
		String sql = "select ntitle, nauthor from news order by ncreatedate desc";
		pstmt = conn.prepareStatement(sql);		
		rs = pstmt.executeQuery();
		// 执行数据库命令		
		while(rs.next()) {		
			News item = new News();
			item.setNtitle(rs.getString(1));
			item.setNauthor(rs.getString(2));
			list.add(item);
		}
	} catch (ClassNotFoundException e) {
		e.printStackTrace();
	} catch (SQLException e) {
		e.printStackTrace();
	} finally {
		// 若结果集对象不为空，则关闭
		if (rs != null) {
			try {
				rs.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}

		// 若PreparedStatement对象不为空，则关闭
		if (pstmt != null) {
			try {
				pstmt.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}

		// 若数据库连接对象不为空，则关闭
		if (conn != null) {
			try {
				conn.close();
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
	}
	
	 %>
    <ul class="classlist">
    <%
    	for(int i=0;i<list.size();i++){
    		News news = list.get(i);
    	
    %>
      <li> <%=news.getNtitle() %> <span> 作者：<%=news.getNauthor() %>&#160;&#160;&#160;&#160; <a href='#'>修改</a> &#160;&#160;&#160;&#160; <a href='#' onclick='return clickdel()'>删除</a> </span> </li>
      
    <%
     	if((i+1)%5==0){
    %>
        <li class='space'></li>
    <%
    	} 
    %>
    <%
    	}
    %>
      </ul>
  </div>
</div>
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<div id="footer">
  <p class="">24小时客户服务热线：010-68988888  &#160;&#160;&#160;&#160; <a href="#">常见问题解答</a> &#160;&#160;&#160;&#160;  新闻热线：010-627488888<br />
    文明办网文明上网举报电话：010-627488888  &#160;&#160;&#160;&#160;  举报邮箱：<a href="#">jubao@jb-aptech.com.cn</a></p>
  <p class="copyright">Copyright &copy; 1999-2009 News China gov, All Right Reserver<br />
    新闻中国   版权所有</p>
</div>
</body>
</html>

效果图：