基本上，我有一个textarea，用户可以在其中输入MySQL查询，例如SELECT * FROM table_names。需要运行查询，并且需要将结果加载到选择字段中。我尝试了各种方法，但都没有成功，任何建议去做这件事都将非常感激。
mainInterface.jsp
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ page language="Java" import="java.sql.*" %>
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%!
String gUser;
String gDatabase;
String gPassword;
String gUrl;
String gUrlFront;
String gUrlBack;
%>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="main_canvas.css" rel="stylesheet" type="text/css" />
<link rel="stylesheet" type="text/css" href="tabview.css" />
<link rel="stylesheet" href="css/jquery.treeview.css" />
<script type="text/javascript" src="tabview.js"></script>
<script src="js/jquery-1.4.min.js" type="text/javascript"></script>
<script src="js/jquery.cookie.js" type="text/javascript"></script>
<script src="js/jquery.treeview.js" type="text/javascript"></script>
<script language="javascript" type="text/javascript">
<!--
//Browser Support Code
function ajaxFunction(){
var ajaxRequest; // The variable that makes Ajax possible!
try
{
// Opera 8.0+, Firefox, Safari
ajaxRequest = new XMLHttpRequest();
}
catch (e)
{
// Internet Explorer Browsers
try
{
ajaxRequest = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e)
{
try
{
ajaxRequest = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e)
{
// Something went wrong
alert("Your browser broke!");
return false;
}
}
}
// Create a function that will receive data sent from the server
ajaxRequest.onreadystatechange = function()
{
if(ajaxRequest.readyState == 4)
{
document.getElementById("boxx").innerHTML= "<option>" + ajaxRequest.responseText + "</option>";
}
}
var age = 1;
var wpm = 3;
var sex = 5;
var queryString = "?dsname=" + gDatabase + "&user=" + gUser + "&pass=" + gPassword + "&u1=" + gUrlFront + "&u2=" + gUrl + "&u2=" + gUrlBack ;
ajaxRequest.open("GET", "exeQuery.jsp" + queryString, true);
ajaxRequest.send(null);
}
//-->
</script>
<script type="text/javascript">
$(function() {
$("#tree").treeview({
collapsed: true,
animated: "medium",
control:"#sidetreecontrol",
prerendered: true,
persist: "location"
});
})
function myFunction()
{
}
</script>
<style type="text/css">
html, body
{
height: 99%;
width:99%;
background-color:black;
}
</style>
</head>
<body>
<div class="main_body_container" > <!--Start Main Body-->
<div class="main_body_container_left"><!--Start Left Pane-->
<jsp:useBean id="NinGoo" scope="session" class="NinGoo.beancode" />
<%
ResultSet rs = null;
Connection conn = null;
String database = request.getParameter("dsname");
gDatabase = database;
String urlfront = "jdbc:mysql://";
gUrlFront = urlfront;
String url = request.getParameter("url"); // localhost:3306
gUrl = url;
String urlback = "/";
gUrlBack = urlback;
String username = request.getParameter("user");
gUser = username;
String password = request.getParameter("password");
gPassword = password;
NinGoo.setDsname(database);
NinGoo.setURL(urlfront + url + urlback);
NinGoo.setusername(username);
NinGoo.setpassword("");
conn = NinGoo.getConnection();
rs = NinGoo.executeSQL( "SELECT DISTINCT TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA=" + "'" + database + "'");
String result;
%>
<div id="sidetree">
<ul class="treeview" id="tree" >
<h1>LOGO HERE </h1>
<li class="expandable"><div class="hitarea expandable-hitarea"></div><span><strong><b><%=database %> (DSNAME)</b> </br></strong></span>
<ul style="display: none;">
<%
while (rs.next())
{
result = rs.getString("TABLE_NAME");
%>
<li class="expandable"><div class="hitarea expandable-hitarea"></div><span><strong><%=result%></strong></span>
<ul style="display: none;">
<%
ResultSet columnNames = null;
String colName;
String colType;
columnNames = NinGoo.executeSQL("SELECT COLUMN_NAME, COLUMN_TYPE FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA='" + database + "'" + "AND TABLE_NAME='" + result + "'");
while(columnNames.next())
{
colName = columnNames.getString("COLUMN_NAME");
colType = columnNames.getString("COLUMN_TYPE");
%>
<table>
<li><tr><td style="width:60px;"><%=colName%></td><td style="width:20px;"></td><td align="left" style="width:100px;white-space: nowrap;"><%=colType%></td></tr></li>
</table>
<%
}
%>
</ul>
</li>
<%
}
%>
</ul>
</li>
</ul>
</div>
</div><!--End Left Pane-->
<div class="main_body_container_right"> <!--Start Right Pane-->
<div class="TabView" id="TabView"> <!--Start Tabs Section-->
<div class="Tabs" style="width: 400px;"><!--Start Tabs-->
<a>Construct Cube</a>
<a>Explore Cube</a>
</div><!-- End Tabs-->
<div class="Pages"> <!--Begin Pages Content-->
<div class="Page"> <!-- *** Page1 Start *** -->
<div class="Pad"><!-- Page 1 Start Pad-->
<button onclick="ajaxFunction()" style="float:left;"> Execute Query </button>
<textarea style="float:left;height:400px;width:1000px;resize:none;border: solid black 2px;"> </textarea>
<b style="padding-left:30%; padding-top:20px;">Cube Name </b>
<input id="cubeName" type="text" size="65" style="border:solid black 1px"/>
<table>
<tr>
<td style="height:30px;">
<!--Empty Cell Used For Alignment-->
</td>
</tr>
<tr>
<td style="height:30px;">
<!--Empty Cell Used For Alignment-->
</td>
<td>
<button id="dim">Add Dimension</button>
</td>
<td>
<button>Choose Column</button>
</td>
<td>
<!--Empty Column Used For Alignment-->
</td>
<td>
<button>Granularity</button>
</td>
</tr>
<tr>
<td style="width:50px;">
<!--Empty Column Used For Alignment-->
</td>
<tr>
<td style="height:100px;">
<!--Empty Cell Used For Alignment-->
</td>
<td style="width:200px;;">
<select size="5" name="selectionField" multiple="yes" >
<option >Will List Dimensions</option>
</select>
</td>
<td >
<select id="boxx" style="width:200px;" name="selectionField" multiple="yes" >
<option >Will List Columns</option>
</select>
</td>
<td align="center" style="width:100px;">
<button> --> </button>
</td>
<td>
<select size="5" name="selectionField" multiple="yes" >
<option >Will List Granularity</option>
</select>
</td>
</tr>
<tr>
<td style="height:30px;">
<!--Empty Cell Used For Alignment-->
</td>
</tr>
<tr>
<td style="height:60px;">
<!--Empty Cell Used For Alignment-->
</td>
<td>
<button>Aggregate</button>
</td>
<td>
<button>Choose Column</button>
</td>
<td>
<!--Empty Column Used For Alignment-->
</td>
<td>
<button>Measures</button>
</td>
</tr>
<tr>
<td style="width:50px;">
<!--Empty Column Used For Alignment-->
</td>
<td style="width:200px;;">
<select size="5" name="selectionField" multiple="yes" >
<option >Will List Aggregate </option>
</select>
</td>
<td>
<select size="5" name="selectionField" multiple="yes" >
<option >Will List Columns</option>
</select>
</td>
<td align="center" style="width:100px;">
<button> --> </button>
</td>
<td>
<select size="5" name="selectionField" multiple="yes" >
<option >Will List Measures</option>
</select>
</td>
</tr>
<tr>
<td style="height:50px;">
<!--Empty Column Used For Alignment-->
</td>
<td align="center" colspan="4">
<button style="padding-left:25px; padding-right:25px;"> Save Cube </button>
</td>
</tr>
</table>
</div> <!--End Page1 Pad -->
</div> <!--End Page 1 -->
<div class="Page"> <!-- *** Page2 Start *** -->
<div class="Pad"><!-- Page2 Start Pad-->
</div> <!--End Page2 Pad -->
</div> <!--End Page 2 -->
</div> <!--End Pages -->
</div><!--End TabView -->
</div><!--End Right Pane-->
</div> <!--End Main Body-->
<script type="text/javascript">
tabview_initialize('TabView');
</script>
</body>
</html>
<%--
Document : exeQuery.jsp
Created on : Nov 28, 2012, 3:07:13 PM
Author : Raymond
--%>
exeQuery.jsp
<%@ page language="Java" import="java.sql.*" %>
<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<!DOCTYPE html>
<jsp:useBean id="NinGoo" scope="session" class="NinGoo.beancode" />
<%
ResultSet rs = null;
Connection conn = null;
String database = request.getParameter("dsname");
String urlfront = "jdbc:mysql://";
String url = request.getParameter("u2"); // localhost:3306
String urlback = "/";
String username = request.getParameter("user");
String password = request.getParameter("pass");
NinGoo.setDsname(database);
NinGoo.setURL(urlfront + url + urlback);
NinGoo.setusername(username);
NinGoo.setpassword("");
conn = NinGoo.getConnection();
rs = NinGoo.executeSQL( "SELECT DISTINCT TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA=" + "'" + database + "'");
String result = null;
while (rs.next())
{
result = rs.getString("TABLE_NAME");
}
out.print(result);
%>
答案 0 :(得分：0)
您应该只创建一个Servlet，使用AJAX发布到它，然后从查询中发回信息并填充您的选择字段。如果你不想在JS中写很多东西，我建议你用Servlet中的名字和所有东西创建字段并将它发送回AJAX对象。然后，您只需添加返回页面中元素的内容即可。
编辑：你永远不应该使用JSP来执行你的查询。