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PORefreshing (updating) individual rows of a table with the data returned by the action class using ajax call
 

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  1. PORefreshing (updating) individual rows of a table with the data returned by the action class using ajax call
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    <p>from so many days i am trying to get this done,but m failing. Have a look at my jsp once below:</p> <p>Here i have one table and all each row i have refresh icon,i want to refresh individual row when clicked the icon.</p> <p>onclick i am calling a function-> <code>refreshRecord(value);</code> value(parameter) is the fileid(unique)->i.e the first column of the table i am passing as a parameter to the function.</p> <p><code>ajax</code> is calling the <code>checkStatusAndNumRecs</code> aciton with the <code>fileId</code>,in action class i am calling my <code>JPA</code> method to get data from the database,its reading the row with that <code>fileId</code> what i have passed and putting it in <code>JSONObject</code>.</p> <p>In jsp in ajax part its executing suuccess some time and error its executing most of the time, when it is success,inside success part ,its failing to execute this line->var <code>obj = jQuery.parseJSON(eval(data));</code></p> <p>that means some times data is returning to ajax sometimes data is not coming back to ajax from action class.</p> <p>THis is my jsp page:</p> <pre><code>&lt;%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%&gt; &lt;%@ taglib prefix="s" uri="/struts-tags"%&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"&gt; &lt;html&gt; &lt;head&gt; &lt;title&gt;File Upload&lt;/title&gt; &lt;script type="text/javascript" src="js/jquery-1.4.1.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="js/jquery-1.8.2.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="js/jquery.min.js"&gt;&lt;/script&gt; &lt;link rel="stylesheet" type="text/css" href="css/style1.css" /&gt; &lt;link rel="stylesheet" type="text/css" href="css/button.css" /&gt; &lt;link href="css/common-style.css" rel="stylesheet" type="text/css" /&gt; &lt;style&gt; a{ color:white; text-decoration:none; } &lt;/style&gt; &lt;script type="text/javascript"&gt; var id; function refreshRecord(value) { id = value; } $(document).ready(function(){ $("#refresh").click(function(){ var fileId=id; $.ajax({ type:"post", url:"checkStatusAndNumRecs", data:{fileId:fileId}, success:function(data) { alert(data); var obj = jQuery.parseJSON(eval(data));-&gt;THis statement is not executing aler("after JSON OBJECT"+obj.status); $("#div1").html(obj.status); $("#div2").html(obj.records); }, error:function(data) { $("#div1").html("It was a failure !!!"); } }); }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;%@include file="index1.html" %&gt; &lt;div class="box2"&gt; &lt;div class="box3"&gt; &lt;s:property value="userId"/&gt; &lt;/div&gt; &lt;center&gt;&lt;h2&gt;FILE STATUS&lt;/h2&gt;&lt;/center&gt; &lt;center&gt; &lt;form action="Upload" method="post" enctype="multipart/form-data"&gt; &lt;label for="myFile" class="text"&gt;Upload your file:&lt;/label&gt; &lt;input type="hidden" name="upload" value="upload"/&gt; &lt;input type="file" name="myFile" size="40" class="file"/&gt; &lt;input type="submit" value="Upload" class="button"/&gt; &lt;input type="submit" value="Refresh" class="button"/&gt; &lt;/form&gt; &lt;/center&gt; &lt;center&gt; &lt;s:if test="%{user.roles == 'admin'}"&gt; &lt;form action="manage" method="post" enctype="multipart/form-data"&gt; &lt;label for="myFile" class="text"&gt;Click to manage service providers:&lt;/label&gt; &lt;input type="submit" value="Manage" class="button"/&gt; &lt;/form&gt; &lt;/s:if&gt; &lt;/center&gt; &lt;center&gt; &lt;table border="1" class="displaytab" id="rtable"&gt; &lt;s:if test="%{user.roles == 'admin'}"&gt; &lt;tr&gt; &lt;td colspan="10" style="background:#7395B8;color:white;font-size:18px;font-weight:bold;"&gt;&lt;center&gt;Admin&lt;/center&gt;&lt;/td&gt;&lt;/tr&gt; &lt;/s:if&gt; &lt;tr&gt; &lt;th&gt;FileId&lt;/th&gt;&lt;th&gt;File Name&lt;/th&gt;&lt;th&gt;Upload Date&lt;/th&gt;&lt;th&gt;#Records&lt;/th&gt;&lt;th&gt;Status&lt;/th&gt;&lt;th&gt;Estimated Time&lt;/th&gt;&lt;th&gt;Processed Records&lt;/th&gt;&lt;th&gt;Generate Report&lt;/th&gt;&lt;th&gt;&lt;/th&gt;&lt;s:if test="%{user.roles == 'admin'}"&gt;&lt;th&gt;Controls&lt;/th&gt;&lt;/s:if&gt; &lt;/tr&gt; &lt;s:iterator value="uploadList" var="m"&gt; &lt;tr&gt; &lt;td&gt;&lt;s:property value="%{#m.fileId}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#m.fileName}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#m.uploadDate}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;div id="div2"&gt;&lt;s:property value="%{#m.numRecords}" /&gt;&lt;/div&gt;&lt;/td&gt; &lt;td&gt;&lt;div id="div1"&gt;&lt;s:property value="%{#m.status}" /&gt;&lt;/div&gt;&lt;/td&gt; &lt;td&gt;tbd&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#m.numRecords}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;a href=""&gt;&lt;img src="images/generate.png" title="Generate Report"&gt;&lt;/a&gt;&lt;/td&gt; &lt;td&gt;&lt;a href=""&gt;&lt;img src="images/refresh.png" title="Refresh" id="refresh" onclick="refreshRecord(&lt;s:property value="%{#m.fileId}" /&gt;);"&gt;&lt;/a&gt;&lt;/td&gt; &lt;s:if test="%{user.roles == 'admin'}"&gt; &lt;td&gt;&lt;a href=""&gt;&lt;img src="images/details.png"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/plus.png" title="Add Instance"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/minus.png" title="Remove Instance"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/download.png" title="Download"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/reconnect.png" title="Reconnect"&gt;&lt;/a&gt;&lt;/td&gt; &lt;/s:if&gt; &lt;/tr&gt; &lt;/s:iterator&gt; &lt;/table&gt; &lt;/center&gt; &lt;br&gt; &lt;br&gt; &lt;br&gt; &lt;br&gt; &lt;center&gt; &lt;s:if test="%{user.roles == 'admin'}"&gt; &lt;!-- &lt;select name="user names"&gt; &lt;s:iterator value="userNamesList"&gt; &lt;option value="emailColumn" &gt; &lt;s:property/&gt; &lt;/option&gt; &lt;/s:iterator&gt; &lt;/select&gt; --&gt; &lt;table border="1" class="displaytab" id="usertab"&gt; &lt;s:if test="%{uploadListMap.size() != 0}"&gt; &lt;tr&gt; &lt;td colspan="10" style="background:#7395B8;color:white;font-size:18px;font-weight:bold;"&gt;User Job Details&lt;/center&gt;&lt;/td&gt;&lt;/tr&gt; &lt;tr&gt; &lt;th&gt;FileId&lt;/th&gt;&lt;th&gt;File Name&lt;/th&gt;&lt;th&gt;Upload Date&lt;/th&gt;&lt;th&gt;#Records&lt;/th&gt;&lt;th&gt;Status&lt;/th&gt;&lt;th&gt;Estimated Time&lt;/th&gt;&lt;th&gt;Processed Records&lt;/th&gt;&lt;th&gt;Generate Report&lt;/th&gt;&lt;th&gt;&lt;/th&gt;&lt;s:if test="%{user.roles == 'admin'}"&gt;&lt;th&gt;Controls&lt;/th&gt;&lt;/s:if&gt; &lt;/tr&gt; &lt;s:iterator value="%{uploadListMap}"&gt; &lt;tr&gt; &lt;td colspan="10" style="background:#7395B8;color:white;font-size:18px;font-weight:bold;"&gt;&lt;center&gt;&lt;s:property value="key"/&gt;&lt;/center&gt;&lt;/td&gt; &lt;s:iterator value="value" var="u"&gt; &lt;tr&gt; &lt;td&gt;&lt;s:property value="%{#u.fileId}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#u.fileName}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#u.uploadDate}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#u.numRecords}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#u.status}" /&gt;&lt;/td&gt; &lt;td&gt;tbd&lt;/td&gt; &lt;td&gt;&lt;s:property value="%{#m.numRecords}" /&gt;&lt;/td&gt; &lt;td&gt;&lt;a href=""&gt;&lt;img src="images/generate.png" title="Generate Report"&gt;&lt;/a&gt;&lt;/td&gt; &lt;td&gt;&lt;a href=""&gt;&lt;img src="images/refresh.png" title="Refresh" id="refresh" onclick="refreshRecord(&lt;s:property value="%{#u.fileId}" /&gt;);"&gt;&lt;/a&gt;&lt;/td&gt; &lt;td&gt;&lt;a href=""&gt;&lt;img src="images/details.png"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/plus.png" title="Add Instance"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/minus.png" title="Remove Instance"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/download.png" title="Download"&gt;&lt;/a&gt; &lt;a href=""&gt;&lt;img src="images/reconnect.png" title="Reconnect"&gt;&lt;/a&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/s:iterator&gt; &lt;/tr&gt; &lt;/s:iterator&gt; &lt;/s:if&gt; &lt;/table&gt; &lt;/s:if&gt; &lt;/center&gt; &lt;/div&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>This is my action class:</p> <p>p</p> <pre><code>ackage com.mxui; import com.mxui.db.api.PersistenceService; import com.mxui.db.service.*; import org.json.simple.JSONObject; import com.opensymphony.xwork2.ActionSupport; public class checkStatusAndNumRecsAction extends ActionSupport { /** * */ private String status; public String getStatus() { return status; } public void setStatus(String status) { this.status = status; } private long numRecords; public long getNumRecords() { return numRecords; } public void setNumRecords(long numRecords) { this.numRecords= numRecords; } private String fileId; public String getFileId() { return fileId; } public void setFileId(String fileId) { this.fileId = fileId; } public String execute() { JSONObject obj = new JSONObject(); System.out.println("here inside action-------------"); PersistenceService svc = PersistenceServiceImpl.getInstance(); status = svc.getStatusByFileId(fileId); System.out.println("status is "+status); numRecords = svc.getNumRecordsByFileId(fileId); System.out.println("num records are "+numRecords); obj.put("status", status); obj.put("records", numRecords); System.out.print("json data is "+obj); return "SUCCESS"; } } </code></pre> <p>Please guide me in this ,i am struggling for this from so many days,and also i am new to ajax. Thankyou in advance.</p> <pre><code>This is my struts.xml file: &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" "http://struts.apache.org/dtds/struts-2.0.dtd"&gt; &lt;struts&gt; &lt;constant name="struts.devMode" value="false" /&gt; &lt;constant name="struts.multipart.maxSize" value="1000000" /&gt; &lt;result-type name="json" class="org.apache.struts2.json.JSONResult" default="false" /&gt; &lt;package name="struts" extends="struts-default"&gt; &lt;action name="RegisterationProcess" class="com.mxui.RegisterationFormAction"&gt; &lt;result name="SUCCESS"&gt;registerationform.jsp&lt;/result&gt; &lt;result name="customerRegister"&gt;successregisteration.jsp&lt;/result&gt; &lt;/action&gt; &lt;action name="CheckUserValidation" class="com.mxui.CheckUserAction"&gt; &lt;result name="SUCCESS"&gt;noofrows.jsp&lt;/result&gt; &lt;/action&gt; &lt;action name="ProcessLogin" class="com.mxui.LoginAction"&gt; &lt;result name="LOGIN" &gt;login.jsp&lt;/result&gt; &lt;result name="REGISTER"&gt;registerationform.jsp&lt;/result&gt; &lt;result name="ERROR" type="redirect"&gt;login.jsp&lt;/result&gt; &lt;result name="FILEUPLOAD" type="redirect"&gt;Upload&lt;/result&gt; &lt;/action&gt; &lt;action name="Upload" class="com.mxui.UploadFileAction"&gt; &lt;result name="SUCCESS"&gt;fileupload.jsp&lt;/result&gt; &lt;result name="LOGINERROR" type="redirect"&gt;ProcessLogin&lt;/result&gt; &lt;result name="PREVIEW" type="redirect"&gt;FilePreviewAction&lt;/result&gt; &lt;result name="ERROR"&gt;error.jsp&lt;/result&gt; &lt;/action&gt; &lt;action name="FilePreviewAction" class="com.mxui.FilePreviewAction"&gt; &lt;result name="SUCCESS"&gt;filepreview.jsp&lt;/result&gt; &lt;result name="JOBCREATED" type="redirect"&gt;Upload&lt;/result&gt; &lt;result name="ERROR" type="redirect"&gt;ProcessLogin&lt;/result&gt; &lt;/action&gt; &lt;action name="ServiceProviderProcess" class="com.mxui.ServiceProviderAction"&gt; &lt;result name="SUCCESS"&gt;CreateProvider.jsp&lt;/result&gt; &lt;result name="serviceprovider" type="redirect"&gt;Upload&lt;/result&gt; &lt;/action&gt; &lt;action name="UpdateServiceProviderProcess" class="com.mxui.UpdateServiceProviderAction"&gt; &lt;result name="SUCCESS"&gt;updateserviceprovider.jsp&lt;/result&gt; &lt;result name="updated" type="redirect"&gt;Upload&lt;/result&gt; &lt;/action&gt; &lt;action name="manage" class="com.mxui.ManageServiceProviderAction"&gt; &lt;result name="SUCCESS"&gt;manageserviceprovider.jsp&lt;/result&gt; &lt;/action&gt; &lt;/package&gt; &lt;package extends="struts-default,json-default" name="name" namespace=""&gt; &lt;interceptor name="json" class="org.apache.struts2.json.JSONInterceptor" /&gt; &lt;action name="checkStatusAndNumRecs" class="com.mxui.checkStatusAndNumRecsAction" method="execute"&gt; &lt;result type="json"&gt;&lt;/result&gt; &lt;/action&gt; &lt;/package&gt; &lt;/struts&gt; </code></pre>
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    1. COno its not workin i have included alertsome times i am able to see data in the alert some times its showing empty..
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    2. CO@pikrut yes i am using struts2.
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    3. COI think you are working with struts. struts ajax support is different
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