html从数据库中读取数据

Posted 2023-05-07

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如题你实现了吗？我现在很困惑，能不能帮帮我？
<html><body>……</body></html>里面从数据库中读数据，你是通过什么途径实现的能教教我吗？
我是新手，真的希望能帮帮我，谢谢大哥！

HTML是无法读取数据库的，HTML是页面前端脚本语言，要想从HTML网页中获取SQL数据库里的数据，需要借助JSP或ASP或PHP或RUBY等语言来实现。
简单的关系可以这样理解：
数据库<--->JSP或ASP或PHP或RUBY等语言<--->HTML
如：在JSP页面中显示完整代码如下：
<%@ page
language="java"
contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"
%>
<%@page import="java.sql.*"%>
<center>
<H1> <font color="blue" size="12">管理中心</font></H1>
<HR />
<table border="1">
<tr>
<th>ID</th>
<th>书名</th>
<th>作者</th>
<th>价格</th>
<th>删除</th>
</tr>
<%
// 数据库的名字
String dbName = "zap";
// 登录数据库的用户名
String username = "sa";
// 登录数据库的密码
String password = "123";
// 数据库的IP地址，本机可以用 localhost 或者 127.0.0.1
String host = "127.0.0.1";
// 数据库的端口，一般不会修改，默认为1433
int port = 1433;
String connectionUrl = "jdbc:sqlserver://" + host + ":" + port + ";databaseName=" + dbName + ";user=" + username
+ ";password=" + password;
//
//声明需要使用的资源
// 数据库连接，记得用完了一定要关闭
Connection con = null;
// Statement 记得用完了一定要关闭
Statement stmt = null;
// 结果集，记得用完了一定要关闭
ResultSet rs = null;
try
// 注册驱动
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
// 获得一个数据库连接
con = DriverManager.getConnection(connectionUrl);
String SQL = "SELECT * from note";
// 创建查询
stmt = con.createStatement();
// 执行查询，拿到结果集
rs = stmt.executeQuery(SQL);
while (rs.next())
%>
<tr>
<td>
<%=rs.getInt(1)%>
</td>
<td>
<a href="prepareupdate?ID=<%=rs.getInt("ID")%>" target="_blank"><%=rs.getString(2)%></a>
</td>
<td>
<%=rs.getString(3)%>
</td>
<td>
<%=rs.getString(4)%>
</td>
<td>
<a href="delete?ID=<%=rs.getInt("ID")%>" target="_blank">删除</a>
</td>
</tr>
<%

catch (Exception e)
// 捕获并显示异常
e.printStackTrace();
finally
// 关闭我们使用过的资源
if (rs != null)
try
rs.close();
catch (Exception e)
if (stmt != null)
try
stmt.close();
catch (Exception e)
if (con != null)
try
con.close();
catch (Exception e)

%>
</table>
<a href="insert.jsp">添加新纪录</a>
</center> 参考技术A html只能通过ajax接口跟后台数据库接口通信，然后取出来的数据在页面上显示。
以下是一个例子：

html文件suggest.html：
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script language="JavaScript" type="text/javascript" src="ajax_search.js"></script>
<style type="text/css" media="screen">
body
font: 11px arial;

.suggest_link
background-color: #FFFFFF;
padding: 2px 6px 2px 6px;
cursor:hand;

.suggest_link_over
background-color: #E8F2FE;
padding: 2px 6px 2px 6px;

#search_suggest
position:relative;
background-color: #FFFFFF;
text-align: left;
border: 1px solid #000000;
left: -12px;
top: 1px;
height: 74px;
width: 170px;
display:none;

</style>
</head>
<body background="bg.gif">
<center>
<h3>实现搜索提示</h3>
<div style="width: 500px;">
<input type="text" id="txtSearch" name="txtSearch" onKeyUp="searchSuggest();" autocomplete="off" />
<input type="submit" id="cmdSearch" name="cmdSearch" value="搜索"/><br />
<div id="search_suggest"></div>
</div>
</center>
</body>
</html>

ajax_search.js：
var searchReq = createAjaxObj();
function createAjaxObj()

var httprequest=false;
if (window.XMLHttpRequest) //为非IE浏览器生成XmlHttpRequest对象

httprequest=new XMLHttpRequest()
if (httprequest.overrideMimeType) httprequest.overrideMimeType('text/xml')

else if (window.ActiveXObject) //为IE浏览器生成XmlHttpRequest对象

try

httprequest=new ActiveXObject("Msxml2.XMLHTTP");

catch (e)

try

httprequest=new ActiveXObject("Microsoft.XMLHTTP");

catch (e)

return httprequest

function searchSuggest()

if (searchReq.readyState == 4 || searchReq.readyState == 0)

var str = escape(document.getElementById('txtSearch').value);
searchReq.open("GET", 'search?search=' + str, true);//向服务器端发送请求
searchReq.onreadystatechange = handleSearchSuggest; //设置回调函数
searchReq.send(null);

function handleSearchSuggest()
//这是回调函数，处理从服务器端返回的信息
if (searchReq.readyState == 4)

var ss = document.getElementById('search_suggest')
ss.innerHTML = '';
var str = searchReq.responseText.split("\n");
for(i=0; i < str.length - 1; i++)

var suggest = '<div onmouseover="javascript:suggestOver(this);" ';
suggest += 'onmouseout="javascript:suggestOut(this);" ';
suggest += 'onclick="javascript:setSearch(this.innerHTML);" ';
suggest += 'class="suggest_link">' + str[i] + '</div>';
ss.innerHTML += suggest;
ss.style.display="block";

function suggestOver(div_value)

div_value.className = 'suggest_link_over';

function suggestOut(div_value)

div_value.className = 'suggest_link';

function setSearch(value)

document.getElementById('txtSearch').value = value;
document.getElementById('search_suggest').innerHTML = '';
document.getElementById('search_suggest').style.display="none";

servlet文件SearchSuggest.java：
package com;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class SearchSuggest extends HttpServlet

public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, java.io.IOException

response.setCharacterEncoding("UTF-8");
String search = request.getParameter("search"); //接受参数值

String sql = "select GoodsName from Goods where GoodsName like '"+search+"%' order by GoodsName";//设置查询语句
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
ArrayList vData = new ArrayList();
java.io.PrintWriter out = response.getWriter();
try
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); //注册数据库连接驱动

String MdbPath = "F:/sneaker/Tomcat/webapps/search/database/#costume.mdb";
String url= "jdbc:odbc:driver=Microsoft Access Driver (*.mdb);DBQ=" + MdbPath ;
conn = DriverManager.getConnection(url);

stmt = conn.createStatement();
rs = stmt.executeQuery(sql); //执行查询
while (rs.next())

vData.add(rs.getString("GoodsName"));

StringBuilder buf = new StringBuilder();
for (int i=0;i<vData.size();i++)

String keyword = (String)vData.get(i);
buf.append(keyword+"\n");

out.print(buf.toString());//向客户端输出信息
catch (Exception e)
e.printStackTrace();
finally
try
if (stmt != null)
stmt.close();
if (conn != null)
conn.close();
catch (SQLException sqle)

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException

doPost(request, response);

参考技术B html是一种静态语言。不能直接读取数据库里的内容。。。
如果要读数据库。你必须会一些简单的php asp之类。。。这些是服务器端的程序语言，可以操作数据库的是这个。。。而html是客户端的。肯定不能操作数据库。。。本回答被提问者和网友采纳