无法解析来自服务器的 JSON 数据
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【中文标题】无法解析来自服务器的 JSON 数据【英文标题】：JSON data from server could not be parsed 【发布时间】：2012-03-18 15:29:58 【问题描述】：我收到“DataTables 警告：。这是由 JSON 格式错误引起的” 我知道这可能是其他线程的副本，我在代码中使用了 java 和 dataTables。我得到的是 JSON 格式的输出，但在打印时客户端无法识别它。
当我验证 http://jsonlint.com/ 中的 JSON 对象时，它的格式正确。我不确定是什么导致了这个错误。
"iTotalRecords":5,"sEcho":"1","aaData":[["V2993ASFKH230943","本田","雅阁"],["V2993A39SNF30943","本田","CRV"] ,["V4833A39SNF30943","讴歌","TSX"],["V4833RE9SNF30943","讴歌","TL"],["V9383RE9SNF30943","讴歌","MDX"]],"iTotalDisplayRecords":5
任何帮助将不胜感激。
谢谢
编辑
try
JSONObject jsonResponse = new JSONObject();
jsonResponse.put("sEcho", sEcho);
jsonResponse.put("iTotalRecords", iTotalRecords);
jsonResponse.put("iTotalDisplayRecords", iTotalDisplayRecords);
while (itr.hasNext())
Map rs = (Map) itr.next();
FleetEquipment eqpmt = new FleetEquipment();
eqpmt.setVinNumber((String) rs.get("VIN_ID"));
eqpmt.setMake((String) rs.get("MAKE"));
eqpmt.setModel((String) rs.get("MODEL"));
JSONArray row = new JSONArray();
row.put(eqpmt.getVinNumber()).put(eqpmt.getMake())
.put(eqpmt.getModel());
data.put(row);
jsonResponse.put("aaData", data);
response.setContentType("application/json");
response.getWriter().print(jsonResponse.toString());
catch (JSONException e)
// TODO Auto-generated catch block
e.printStackTrace();
response.setContentType("text/html");
response.getWriter().print(e.getMessage());
编辑 1
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%>
<portlet:defineObjects/>
<portlet:resourceURL var="listURL" id="list" escapeXml="false"/>
<script type="text/javascript">
$(document).ready(function ()
$('#listTable').dataTable(
"bServerSide": true,
"sAjaxSource": "<%=listURL.toString()%>",
"bProcessing": true,
"sPaginationType": "full_numbers",
"bJQueryUI": true
);
);
</script></head>
<body>
<table id="listTable">
<thead>
<tr>
<th>VIN ID</th>
<th>MAKE</th>
<th>MODEL</th>
<th>MODEL1</th>
<th>Model2</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
【问题讨论】：
你确定，上面提到的 JSON 中没有任何额外的词吗？我的意思是任何错误？ 是的..我已经在上面提到的链接中验证了。 我知道你已经验证过了，但是你在萤火虫中检查过，至于最终的结果是什么。那是服务器的萤火虫输出吗？可能是您正在验证正确的 json，但它不是从最终输出中获取的。那么你有没有从最终输出中取出它，比如 firefug？ 您能否发布尝试在服务器端解析 JSON 的代码？ 是的，这就是我在萤火虫中得到的响应。 【参考方案1】：[不是问题的答案，而是工具输入]
http://jsonviewer.stack.hu/
这个工具确实有助于理解外部 JSON 对象的结构。这可能不是您问题的答案，但是，这有助于我用 python 代码很好地理解和解析它，它也是一个 JSON 验证器。
【讨论】：
【参考方案2】：\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\t\r\n\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\t\r\n\t\t\r\n\t\r\n\t\r\n\t\t\r\n\t\r\n VIN ID MAKE MODEL ","
status ":200,"
statusText ":"
OK ","
fnServerData ":"
function (e, j, l, k) \n k.jqXHR = i.ajax(
url: e,
data: j,
success: function (e)
i(k.oInstance).trigger(\"xhr\", k);l(e);, dataType: \"json\", cache: !1, type: k.sServerMethod, error: function (e, i) \"parsererror\" == i && alert(\"DataTables warning: JSON data from server could not be parsed. This is caused by a JSON formatting error.\"););\n", "aoServerParams": [],
"sServerMethod": "GET",
"fnFormatNumber": "function (e) \n if (1000 > e) \n return e;\n \n for (var i = e + \"\", e = i.split(\"\"), j = \"\", i = i.length, l = 0; l < i; l++) \n 0 === l % 3 &&\n 0 !== l && (j = this.oLanguage.sInfoThousands + j), j = e[i - l - 1] + j;\n \n return j;\n",
"aLengthMenu": [10, 25, 50, 100],
"iDraw": 1,
"bDrawing": true,
"iDrawError": -1,
"_iDisplayLength": 10,
"_iDisplayStart": 0,
"_iDisplayEnd": 0,
"_iRecordsTotal": 0,
"_iRecordsDisplay": 0,
"bJUI": true,
"oClasses":
"sTable": "dataTable",
"sPagePrevEnabled": "fg-button ui-button ui-state-default ui-corner-left",
"sPagePrevDisabled": "fg-button ui-button ui-state-default ui-corner-left ui-state-disabled",
"sPageNextEnabled": "fg-button ui-button ui-state-default ui-corner-right",
"sPageNextDisabled": "fg-button ui-button ui-state-default ui-corner-right ui-state-disabled",
"sPageJUINext": "ui-icon ui-icon-circle-arrow-e",
"sPageJUIPrev": "ui-icon ui-icon-circle-arrow-w",
"sPageButton": "fg-button ui-button ui-state-default",
"sPageButtonActive": "fg-button ui-button ui-state-default ui-state-disabled",
"sPageButtonStaticDisabled": "fg-button ui-button ui-state-default ui-state-disabled",
"sPageFirst": "first ui-corner-tl ui-corner-bl",
"sPagePrevious": "previous",
"sPageNext": "next",
"sPageLast": "last ui-corner-tr ui-corner-br",
"sStripeOdd": "odd",
"sStripeEven": "even",
"sRowEmpty": "dataTables_empty",
"sWrapper": "dataTables_wrapper",
"sFilter": "dataTables_filter",
"sInfo": "dataTables_info",
"sPaging": "dataTables_paginate fg-buttonset ui-buttonset fg-buttonset-multi ui-buttonset-multi paging_",
"sLength": "dataTables_length",
"sProcessing": "dataTables_processing",
"sSortAsc": "ui-state-default",
"sSortDesc": "ui-state-default",
"sSortable": "ui-state-default",
"sSortableAsc": "ui-state-default",
"sSortableDesc": "ui-state-default",
"sSortableNone": "ui-state-default",
"sSortColumn": "sorting_",
"sSortJUIAsc": "css_right ui-icon ui-icon-triangle-1-n",
"sSortJUIDesc": "css_right ui-icon ui-icon-triangle-1-s",
"sSortJUI": "css_right ui-icon ui-icon-carat-2-n-s",
"sSortJUIAscAllowed": "css_right ui-icon ui-icon-carat-1-n",
"sSortJUIDescAllowed": "css_right ui-icon ui-icon-carat-1-s",
"sSortJUIWrapper": "DataTables_sort_wrapper",
"sSortIcon": "DataTables_sort_icon",
"sScrollWrapper": "dataTables_scroll",
"sScrollHead": "dataTables_scrollHead ui-state-default",
"sScrollHeadInner": "dataTables_scrollHeadInner",
"sScrollBody": "dataTables_scrollBody",
"sScrollFoot": "dataTables_scrollFoot ui-state-default",
"sScrollFootInner": "dataTables_scrollFootInner",
"sFooterTH": "ui-state-default"
,
"bFiltered": true,
"bSorted": true,
"bSortCellsTop": false,
"oInit":
"bServerSide": true,
"sAjaxSource": "/wps/myportal/!ut/p/b1/hc09DoJAEIbhs3CCGX5kl3IRdVGiolFkG7Mho2IQEkAKTy8aGwt0ukmeLy8oSE3PctAeWY4LB1Cl7vKzbvOq1MXrV-6RBz73fVMg9-QUw0j6bCLmiGj2IO3BeCakwyJEPuImhkLumLsNLBT2v30C6psgrlhP7Jlki72Fof0BvxJvgAMnEJayulGfShUbDMUISU1Nda8zgs2pIGqjvGkhznR2oYg6Ktb6THBThRde2UMIw3gC131G1Q!!/",
"bProcessing": true,
"sPaginationType": "full_numbers",
"bJQueryUI": true
,
"aoDestroyCallback": [],
"fnRecordsTotal": "function () \n return this.oFeatures.bServerSide ? parseInt(this._iRecordsTotal, 10) : this.aiDisplayMaster.length;\n",
"fnRecordsDisplay": "function () \n return this.oFeatures.bServerSide ? parseInt(this._iRecordsDisplay, 10) : this.aiDisplay.length;\n",
"fnDisplayEnd": "function () \n return this.oFeatures.bServerSide ? !1 === this.oFeatures.bPaginate || - 1 == this._iDisplayLength ? this._iDisplayStart + this.aiDisplay.length : Math.min(this._iDisplayStart + this._iDisplayLength, this._iRecordsDisplay) : this._iDisplayEnd;\n",
"sInstance": "fleetList",
"iTabIndex": 0,
"fnStateLoad": "function (e) \n var e = this.oApi._fnReadCookie(e.sCookiePrefix + e.sInstance), j;\n try \n j = \"function\" === typeof i.parseJSON ? i.parseJSON(e) : eval(\"(\" + e + \")\");\n catch (l) \n j = null;\n \n return j;\n",
"fnStateSave": "function (e, i) \n this.oApi._fnCreateCookie(e.sCookiePrefix + e.sInstance, this.oApi._fnJsonString(i), e.iCookieDuration, e.sCookiePrefix, e.fnCookieCallback);\n",
"iInitDisplayStart": -1,
"nTableReinsertBefore": null
],
"tablesDisplayData": [
[]
],
"tablesDisplayExtra": [
[]
]
;
【讨论】：
哈——它破坏了 DataTables 调试器！多哈。无论如何 - 在我看来，您的 JSON 响应包含诸如 "script src=\"C:\\workspaces\\WP1\\SpringPortlet\\WebContent\\jquery.dataTables.js\" 之类的东西，这是无效的 json。采取看看 Firebug 中的响应 - 它的内容不是 JSON（有一些 JSON，但也有其他内容）。 我已经从 jsp 页面中删除了该脚本 src，除了那个 JSON 响应之外，我确实有 dataTables 函数以及响应中的表。 查看此示例以查看预期的响应：datatables.net/release-datatables/examples/data_sources/… - DataTables 函数和响应中的表不是预期的 - 只是表的数据。 我在上面的问题中添加了我的 JSP 页面。关于为什么响应显示表格和javascript的任何线索或想法？自从过去 8 小时以来，我一直在努力解决这个问题..以上是关于无法解析来自服务器的 JSON 数据的主要内容，如果未能解决你的问题，请参考以下文章
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