从JSP页面到外部JavaScript页面获取数组值
我想以树状结构显示MySQL中的数据库 我有一个JSP页面来获取数据库名称，还有一个JavaScript页面以树格式显示它 由于我是web应用程序开发的新手，我不知道如何在不使用jQuery的情况下将数据库名称从JSP页面获取到JavaScript页面。我需要为此使用jQuery吗 demoframeset.html从JSP页面到外部JavaScript页面获取数组值,javascript,Javascript,我想以树状结构显示MySQL中的数据库 我有一个JSP页面来获取数据库名称，还有一个JavaScript页面以树格式显示它 由于我是web应用程序开发的新手，我不知道如何在不使用jQuery的情况下将数据库名称从JSP页面获取到JavaScript页面。我需要为此使用jQuery吗 demoframeset.html <!---------------------------------------------------------------> <!-- Copyright
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您应该能够从请求查询字符串parmaters中检索dbname。 这可以通过以下方式实现：
request.getParameter（“您的参数”）；
试试看{
String dbName=request.getParameter（“dbName”）；//检索dbName参数
字符串responseText=“”；
字符串文本=”；
Class.forName（“com.mysql.jdbc.Driver”）.newInstance（）；
Connection conn=DriverManager.getConnection（“jdbc:mysql://localhost/“+dbName/*在架构URL*/，“root”，“”）中使用dbName；
DatabaseMetaData dbmd=conn.getMetaData（）；
ResultSet ctlgs=dbmd.getCatalogs（）；
while（ctlgs.next（））{
text+=ctlgs.getString（1）+“，”；
}
}捕获（例外e）{
out.println（e）；
}
字符串中，所以您可以使用
标记从字符串
中迭代拆分的数组文本：
USETEXTLINKS = 1
STARTALLOPEN = 0
ICONPATH = ''
foldersTree = gFld("<i>Databases</i>", "demoFramesetRightFrame.html")
foldersTree.treeID = "Frameset"
aux11 = insFld(foldersTree, gFld("New", "Databases.jsp"))
var xmlHttp
function create()
{
xmlHttp=CreateXmlHttpObject()
if (xmlHttp==null)
{
alert ("Browser does not support HTTP Request")
return
}
var url="new1.jsp"
url=url+"?dbname="+str
url=url+"&sid="+Math.random()
// out.print(url)
xmlHttp.onreadystatechange=stateChanged
xmlHttp.open("GET",url,true)
xmlHttp.send()
}
function stateChanged()
{
if (xmlHttp.readyState==4 || xmlHttp.readyState=="complete")
{
document.getElementById("div").innerHTML=xmlHttp.responseText
}
}
function CreateXmlHttpObject()
{
var objXMLHttp=null
if (window.XMLHttpRequest)
{
objXMLHttp=new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
objXMLHttp=new ActiveXObject("Microsoft.XMLHTTP")
}
return objXMLHttp
}
try {
String responseText = "";
String text = "";
Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/", "root", "");
DatabaseMetaData dbmd = conn.getMetaData();
ResultSet ctlgs = dbmd.getCatalogs();
while (ctlgs.next()) {
text += ctlgs.getString(1) + ",";
}
} catch (Exception e) {
out.println(e);
}