要獲得一個AJAX調用

我試圖基於使用sendxmlRequest（）方法eqid從表中獲取值的responseText值：要獲得一個AJAX調用

<select name="eqNAME" onchange="sendxmlRequest('GET','getEquipDetails.jsp',this.value) 
<options> ..... <options> 
</select>

這我ajax.js文件添加

//Make the XMLHttpRequest Object 
var http = createRequestObject(); 
function sendxmlRequest(method, url,eqid){ 
    url = url + "?eqid="+eqid; 
    if(method == 'get' || method == 'GET'){ 
    http.open(method,url,true); 
    http.onreadystatechange = handleResponse; 
    http.send(null); 
    } 
}  

function createRequestObject(){ 
    var req; try { 
    // Firefox, Opera, Safari 
    req = new XMLHttpRequest(); 
    } catch (e) { 
    // Internet Explorer 
    try { 
    //For IE 6 
    req = new ActiveXObject("Msxml2.XMLHTTP"); 
    } catch (e) { 
    try { 
    //For IE 5 
    req = new ActiveXObject("Microsoft.XMLHTTP"); 
    } 
     catch (e) { 
    alert('Your browser is not IE 5 or higher, or Firefox or Safari or Opera'); 
    } 
    } 
} 
return req;

}

用於處理響應（在ajax.js）以下：

function handleResponse(){ 
if(http.readyState == 4 && http.status == 200){ 
    var response = http.responseText; 
} 
}

這裏是我的「getEquipDetails.jsp」文件：

<% 
String planLoc= theResult1.getString(2) == null ? "":theResult1.getString(3); 
String changLoc= theResult1.getString(3) == null ? "":theResult1.getString(4) 
%> 
<% 
response.setHeader("Pragma", "no-cache"); //HTTP 1.0 
response.setDateHeader("Expires", 0); //prevents caching at the proxy server 
response.setHeader("Cache-Control", "no-cache, private, no-store, max-stale=0"); // HTTP 1.1 
%>

我的查詢是，我們如何從getEquipDetails.jsp獲取值planLoc和changLoc並將其設置在responseText的，所以它可以更新在我的網頁下拉？

或者還有什麼其他方式可以解決嗎？

注：我沒有給出表檢索代碼，因爲這已經被照顧。我只是想planLoc和changLoc在我的JSP頁面

來源

2012-04-13 Chillax

更新在getEquipDetails.jsp

寫值response.getWriter()對象。

<% 
response.setHeader("Pragma", "no-cache"); //HTTP 1.0 
response.setDateHeader("Expires", 0); //prevents caching at the proxy server 
response.setHeader("Cache-Control", "no-cache, private, no-store, max-stale=0"); // HTTP 1.1 
PrintWriter res = response.getWriter(); 
res.println(planLoc); 
res.println(changLoc); 
res.close(); 
%>

然後在

function handleResponse(){ 
    if(http.readyState == 4 && http.status == 200){ 
    document.getElementById("dataTable").innerHTML = http.responseText; 
    // dataTable will be id of any HTML tag where you want to display the updated value. 
    } 
}

例如：

<div id="dataTable"></div>

所以，從Ajax響應將在這裏設置。

來源

2012-04-13 10:52:31

要獲得一個AJAX調用

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