cache:true仅适用于GET和HEAD请求。
您可以按照以下方式推出自己的解决方案：
var localCache = { data: {}, remove: function (url) { delete localCache.data[url]; }, exist: function (url) { return localCache.data.hasOwnProperty(url) && localCache.data[url] !== null; }, get: function (url) { console.log('Getting in cache for url' + url); return localCache.data[url]; }, set: function (url, cachedData, callback) { localCache.remove(url); localCache.data[url] = cachedData; if ($.isFunction(callback)) callback(cachedData); }};$(function () { var url = '/echo/jsonp/'; $('#ajaxButton').click(function (e) { $.ajax({ url: url, data: { test: 'value' }, cache: true, beforeSend: function () { if (localCache.exist(url)) { doSomething(localCache.get(url)); return false; } return true; }, complete: function (jqXHR, textStatus) { localCache.set(url, jqXHR, doSomething); } }); });});function doSomething(data) { console.log(data);}在这里工作
编辑：随着这篇文章的流行，对于那些想要管理超时缓存的人来说，这是一个更好的答案，而且当我使用$
.ajaxPrefilter（）时，您也不必费心$
.ajax（）中的所有混乱。。现在只需进行设置就足以正确处理缓存：
{cache:true}var localCache = { timeout: 30000, data: {}, remove: function (url) { delete localCache.data[url]; }, exist: function (url) { return !!localCache.data[url] && ((new Date().getTime() - localCache.data[url]._) < localCache.timeout); }, get: function (url) { console.log('Getting in cache for url' + url); return localCache.data[url].data; }, set: function (url, cachedData, callback) { localCache.remove(url); localCache.data[url] = { _: new Date().getTime(), data: cachedData }; if ($.isFunction(callback)) callback(cachedData); }};$.ajaxPrefilter(function (options, originalOptions, jqXHR) { if (options.cache) { var complete = originalOptions.complete || $.noop, url = originalOptions.url; //remove jQuery cache as we have our own localCache options.cache = false; options.beforeSend = function () { if (localCache.exist(url)) { complete(localCache.get(url)); return false; } return true; }; options.complete = function (data, textStatus) { localCache.set(url, data, complete); }; }});$(function () { var url = '/echo/jsonp/'; $('#ajaxButton').click(function (e) { $.ajax({ url: url, data: { test: 'value' }, cache: true, complete: doSomething }); });});function doSomething(data) { console.log(data);}而且这里的小提琴要 小心，不能与$一起使用。
这是一个可行但有缺陷的实现，与deferd一起使用：
var localCache = { timeout: 30000, data: {}, remove: function (url) { delete localCache.data[url]; }, exist: function (url) { return !!localCache.data[url] && ((new Date().getTime() - localCache.data[url]._) < localCache.timeout); }, get: function (url) { console.log('Getting in cache for url' + url); return localCache.data[url].data; }, set: function (url, cachedData, callback) { localCache.remove(url); localCache.data[url] = { _: new Date().getTime(), data: cachedData }; if ($.isFunction(callback)) callback(cachedData); }};$.ajaxPrefilter(function (options, originalOptions, jqXHR) { if (options.cache) { //Here is our identifier for the cache. Maybe have a better, safer ID (it depends on the object string representation here) ? // on $.ajax call we could also set an ID in originalOptions var id = originalOptions.url+ JSON.stringify(originalOptions.data); options.cache = false; options.beforeSend = function () { if (!localCache.exist(id)) { jqXHR.promise().done(function (data, textStatus) { localCache.set(id, data); }); } return true; }; }});$.ajaxTransport("+*", function (options, originalOptions, jqXHR, headers, completeCallback) { //same here, careful because options.url has already been through jQuery processing var id = originalOptions.url+ JSON.stringify(originalOptions.data); options.cache = false; if (localCache.exist(id)) { return { send: function (headers, completeCallback) { completeCallback(200, "OK", localCache.get(id)); }, abort: function () { } }; }});$(function () { var url = '/echo/jsonp/'; $('#ajaxButton').click(function (e) { $.ajax({ url: url, data: { test: 'value' }, cache: true }).done(function (data, status, jq) { console.debug({ data: data, status: status, jqXHR: jq }); }); });});在这里 有些问题，我们的缓存ID取决于json2 lib JSON对象表示形式。
使用控制台视图（F12）或FireBug查看由缓存生成的一些日志。
