XmlHttp\u63d0\u4f9b\u5ba2\u6237\u7aef\u540chttp\u670d\u52a1\u5668\u901a\u8baf\u7684\u534f\u8bae\u3002\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7XmlHttp\u5bf9\u8c61(MSXML2.XMLHTTP.3.0)\u5411http\u670d\u52a1\u5668\u53d1\u9001\u8bf7\u6c42\u5e76\u4f7f\u7528\u5fae\u8f6fXML\u6587\u6863\u5bf9\u8c61\u6a21\u578bMicrosoft? XML Document Object Model (DOM)\u5904\u7406\u56de\u5e94\u3002XmlHttp\u6700\u5927\u7684\u7528\u5904\u662f\u53ef\u4ee5\u66f4\u65b0\u7f51\u9875\u7684\u90e8\u5206\u5185\u5bb9\u800c\u4e0d\u9700\u8981\u5237\u65b0\u6574\u4e2a\u9875\u9762, ajax\u4e3b\u8981\u901a\u8fc7XmlHttp\u6765\u5b9e\u73b0\u529f\u80fd\u3002<\/p>\n
XmlHttp\u5e94\u7528\u8fc7\u7a0b\uff1a<\/p>\n
??? <\/strong>1\uff0c\u521b\u5efa\u3002<\/strong> ?? IE \u7684XmlHttp\uff1aMSXML2.XMLHTTP.6.0,?? MSXML2.XMLHTTP.5.0,? ? ? ? ?? ??? \/\/\u9488\u5bf9\u4e0d\u540c\u7684\u6d4f\u89c8\u5668\u5efa\u7acbXMLHttpRequest\u5bf9\u50cf? ???????? ?? \/\/\u9488\u5bf9\u975eIE\u591a\u6b3e\u6d4f\u89c8\u5668,Firefox,operia\u53caIE7 ????? ????? ? ?\/\/\u6b64if\u8bed\u53e5\u4e3b\u8981\u9488\u5bf9\u90e8\u5206\u7248\u672c\u7684Mozillar\u6d4f\u89c8\u5668\u7684xml bug? ?????????? ??? \/\/for\u8bed\u53e5\u68c0\u6d4b\u4e0eMSXML\u5217\u8868\u5bf9\u5e94\u7684\u7cfb\u7edfMSXML\u7248\u672c? ??? ??? ?}<\/p>\n 2\uff0c\u64cd\u4f5c<\/strong>\uff1a\u5ba2\u6237\u7aef\u8bf7\u6c42\uff0c \u670d\u52a1\u5668\u54cd\u5e94\u5e76\u8fd4\u56de\u7ed3\u679c\u3002<\/p>\n ? \uff081\uff09\u8bf7\u6c42\uff1a<\/strong> ?????????? onreadystatechange:\u5f53HTTP\u8bf7\u6c42\u7684\u72b6\u6001\u6539\u53d8\u65f6\u8c03\u7528handler\u65b9\u6cd5\uff0cHTTP \u8bf7\u6c42\u67095\u79cd\u72b6\u6001 ?? ??? ??? ?\u6ce8\uff1aonreadystatechange\u4e8b\u4ef6\u53e5\u67c4\u4e0d\u540c\u7684\u6d4f\u89c8\u5668\u80fd\u5904\u7406\u7684\u72b6\u6001\u5e76\u4e0d\u4e00\u81f4\uff0cIE\u548cFireFox\u80fd\u5904\u74061\u52304\uff0c\u800c Safari\u80fd\u5904\u74062\u52304\u7684\u72b6\u6001\uff0cOpera \u80fd\u5904\u74063\u30014\u4e24\u4e2d\u72b6\u6001\u30020\u7684\u72b6\u6001\u57fa\u672c\u6ca1\u4ec0\u4e48\u7528\uff0c\u56e0\u4e3a\u521b\u5efa\u4e86XMLHttpRequest \u5bf9\u8c61\u540e\u90fd\u4f1a\u9a6c\u4e0a\u8c03\u7528open() \u65b9\u6cd5\uff0c\u8fd9\u65f6\u5019\u72b6\u6001\u5c31\u53d8\u62101\u4e86\uff0c\u5f53\u7136\u9664\u975e\u4f60\u8981\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u5df2\u7ecf\u88ab abort() \u53d6\u6d88\uff0c\u53ef\u662f\u8fd9\u6837\u7684\u60c5\u51b5\u4f9d\u7136\u5f88\u5c11\u3002\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\u5224\u65ad\u662f\u4e0d\u662f4\uff08\u5df2\u7ecf\u63a5\u53d7\u5b8c\u6210\uff09\u8fd9\u4e2a\u72b6\u6001\u5c31\u591f\u4e86\u3002 ????? 2\uff09\u5efa\u7acb\u4e0e\u670d\u52a1\u5668\u7684\u8fde\u63a5\uff0c\u521d\u59cb\u5316 HTTP \u8bf7\u6c42\u53c2\u6570\uff0c\u4f8b\u5982 URL \u548c HTTP \u65b9\u6cd5\uff0c\u4f46\u662f\u5e76\u4e0d\u53d1\u9001\u8bf7\u6c42 ??????????? ?? ?\u53c2\u6570 ? \uff082\uff09 \u670d\u52a1\u5668\u54cd\u5e94\u5e76\u8fd4\u56de\u7ed3\u679c<\/strong> XmlHttp\u63d0\u4f9b\u5ba2\u6237\u7aef\u540chttp\u670d\u52a1\u5668\u901a\u8baf\u7684\u534f\u8bae\u3002\u5ba2\u6237\u7aef\u53ef\u4ee5\u901a\u8fc7XmlHttp\u5bf9\u8c61(MSXML2.XMLHT […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-792","post","type-post","status-publish","format-standard","hentry","category-ajax"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/792","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/comments?post=792"}],"version-history":[{"count":0,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/posts\/792\/revisions"}],"wp:attachment":[{"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/media?parent=792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/categories?post=792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/enjoyasp.net\/index.php\/wp-json\/wp\/v2\/tags?post=792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n???????? \u56e0\u6d4f\u89c8\u5668\u7684\u4e0d\u540c\uff0cIE\uff0cMozilla Firefox\u4e4b\u7c7b\u63d0\u4f9b\u7684XmlHttp\u521b\u5efa\u65b9\u5f0f\u4e5f\u968f\u4e4b\u4e0d\u540c\uff0c\u6545\u8981\u6839\u636e\u7528\u6237\u4f20\u6765\u7684\u6d4f\u89c8\u5668\u4fe1\u606f\u6765\u76f8\u5e94\u8fdb\u884c\u9009\u62e9\u76f8\u5e94\u7684\u521b\u5efa\u65b9\u5f0f\u3002\u800c\u6d4f\u89c8\u5668\u4fe1\u606f\u5728\u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\u662f\u5b58\u653e\u5728 User-Agent\u4e2d\uff0c\u6545\u53ef\u901a\u8fc7\u8bfb\u53d6\u5176\u6765\u521b\u5efa\uff0c\u6216\u8005\u5224\u65adXMLHttpRequest\uff0cActiveXObject\u5bf9\u8c61\u662f\u5426\u5b58\u5728\u6765\u5224\u522b\u6d4f\u89c8\u5668\u3002<\/p>\n
\n???????????????????????? MSXML2.XMLHTTP.4.0? ,MSXML2.XMLHTTP.3.0,?
\n????????????????????? ?? MSXML2.XMLHTTP,??????????? Microsoft.XMLHTTP
\n? \u4e0a\u97626\u79cd\u9002\u7528\u4e8eIE6\u4ee5\u4e0b\u7248\u672c\u7684\u6d4f\u89c8\u5668\uff08IE6,IE5 \uff09
\n? \u5bf9\u4e8e\u6bcf\u4e00\u6b3e\u7248\u672c\u7684\u6d4f\u89c8\u5668\u5bf9\u5e94\u7684MSXML2.XMLHTTP\u53ef\u80fd\u6709\u597d\u51e0\u4e2a\u7248\u672c\uff08Miscrosoft\u5728IE5\u624d\u5e94\u7528\u6b64\u6280\u672f\uff0c\u800cIE5\u5bf9\u5e94\u7684\u64cd\u4f5c\u7cfb\u7edf\u662fwindows 98 \u6545\u4ee5\u4e0a\u516d\u79cd\u53ef\u89e3\u51b3\u591a\u6570IE\u6d4f\u89c8\u5668\uff09\uff0c\u4e0a\u9762\u7684\u516d\u79cd\u7248\u672c\uff0c\u5bf9\u4e8eIE5,IE6\u90fd\u662f\u652f\u6301\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u4efb\u610f\u4e00\u4e2a\u90fd\u53ef\u7528\u6765\u521b\u5efaXmlHttp,\u4e00\u822c\u6765\u8bf4\uff0c\u65b0\u7684\u7248\u672c\u4f1a\u6bd4\u65e7\u7684\u7248\u672c\u9519\u8bef\u66f4\u5c11\uff0c\u6027\u80fd\u66f4\u597d\u3002\u5e94\u8be5\u4f18\u5148\u8003\u8651\u4f7f\u7528\u6700\u65b0\u7684\u7248\u672c\uff0c\u5148\u8bd56.0,\u82e5\u7528\u6237\u6ca1\u6709\u6b64\u5347\u7ea7\u8865\u4e01,\u518d\u8bd55.0….
\n?\u5bf9\u4e8eIE7\u4ee5\u4e0a\u7684\u7248\u672cMicrosoft\u652f\u6301\u4e0e\u5176\u5b83\u6d4f\u89c8\u5668\u521b\u5efa\u76f8\u540c\u7684\u65b9\u5f0f\uff0c\u5373\u901a\u8fc7\uff1aobjXmlHttp=new XMLHttpRequest() \u5b8c\u6210\u3002
\n?
\n?\u521b\u5efa\u65b9\u6cd5\u5982\u4e0b\uff1a
\n???????? var xmlHttp;
\n???????? function GetXmlHttpObject(handler) {<\/p>\n
\n?? ? ? ? ? ? if(window.XMLHttpRequest){??
\n???????????? \/\/\u82e5\u5b58\u5728\u5185\u7f6e\u7684XMLHttpRequest\u8bf4\u660e\u662fIE7\uff0c\u53ca\u5176\u5b83\u6d4f\u89c8\u5668<\/p>\n
\n????????? ? xmlHttp=new XMLHttpRequest();?<\/p>\n
\n??? ?? ????? ?if(xmlHttp.overrideMimetype){?
\n????????? ?? ?? ??xmlHttp.overrideMimeType(“text\/xml”);?
\n????????????? ? }?
\n????? ??? ? }?
\n?? ?? ??? ?else if(window.ActiveXObject){?
\n??????????????? \/\/\u82e5\u5b58\u5728ActiveXObject\u5bf9\u8c61\uff0c\u8bc1\u660e\u4e00\u5b9a\u662fIE6\u4ee5\u4e0b\u7684\u6d4f\u89c8\u5668
\n??? ?? ??? ??? ?\/\/\u9488\u5bf9IE6.0\u53ca\u4ee5\u4e0b\u7684IE\u6d4f\u89c8\u5668?
\n??????????? ??? ? var MSXML=[‘MSXML2.XMLHTTP.6.0′,’MSXML2.XMLHTTP.5.0’,?
\n?????????????????????? ‘MSXML2.XMLHTTP.4.0′,’MSXML2.XMLHTTP.3.0’,?
\n?????????????????????? ‘MSXML2.XMLHTTP’,’Microsoft.XMLHTTP’];?<\/p>\n
\n???? ??? ??? ? for(var n = 0; n < MSXML.length; n ++){???????????
\n???? ??? ??? ?? ?? try{\/\/\u5982\u679c\u627e\u5230\u5219\u521b\u5efa\u8be5\u5bf9\u8c61?
\n???????????????? ?? ?? ?xmlHttp = new ActiveXObject(MSXML[n]);?
\n??????????????? ??? ?? ?break;?
\n??????????????? ??? ?? }catch(e){ \/\/\u629b\u51fa\u8bf4\u660e\u6ca1\u6709\u5f53\u524d\u7248\u672c\u7684\u8865\u4e01\uff0c\u8bd5\u4e0b\u4e00\u4e2a\u4f4e\u7ea7\u7248\u672cfor…
\n? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? }?
\n???????????? ?? ?? }?
\n????????????
\n???????????? if ( xmlHttp == null ){
\n?? ??? ??? ?????? alert(“\u4e0d\u80fd\u5efa\u7acbXMLHttpRequest\u5bf9\u8c61\uff0c\u6d4f\u89c8\u5668\u4e0d\u662fIE,FireFox\u7b49\u901a\u7528\u6d4f\u89c8\u5668\u6216IE\u7684??????????????????????????????????? WINDOWS\\system32msxml2.dll \u6587\u4ef6\u4e0d\u5b58\u5728”);
\n?????????????? }
\n???????? ? }?<\/p>\n
\n????? 1\uff09\u8bbe\u7f6e\u63a5\u53d7\u670d\u52a1\u5668\u54cd\u5e94\u7ed3\u679c\u7684\u51fd\u6570\uff08\u5f53open\u7684async\u4e3atrue\u65f6\u6709\u6548\uff09
\n?????????? xmlHttp.onreadystatechange=handler?? \/\/handler\u4e3a\u81ea\u5b9a\u4e49\u7684\u5904\u7406\u51fd\u6570\u7684\u540d\u79f0\uff0c\u4e0d\u8981\u62ec\u53f7<\/p>\n
\n?????????? readyState\u67095\u79cd\u72b6\u6001\uff0c\u5206\u522b\u7528\u6570\u5b57\u7684 0 \u5230 4 \u6765\u8868\u793a\u3002
\n?? ??? ??? ??? ?0 Uninitialized \u521d\u59cb\u5316\u72b6\u6001\u3002XMLHttpRequest \u5bf9\u8c61\u5df2\u521b\u5efa\uff08\u672a\u8c03\u7528open()\u4e4b\u524d\uff09\u6216\u5df2\u88ab abort() \u65b9\u6cd5\u91cd\u7f6e\u3002
\n?? ??? ??? ??? ?1 Open open() \u65b9\u6cd5\u5df2\u8c03\u7528\uff0c\u4f46\u662f send() \u65b9\u6cd5\u672a\u8c03\u7528\u3002\u8bf7\u6c42\u8fd8\u6ca1\u6709\u88ab\u53d1\u9001\u3002
\n?? ??? ??? ??? ?2 Sent Send() \u65b9\u6cd5\u5df2\u8c03\u7528\uff0cHTTP \u8bf7\u6c42\u5df2\u53d1\u9001\u5230 Web \u670d\u52a1\u5668\u3002\u672a\u63a5\u6536\u5230\u54cd\u5e94\u3002
\n?? ??? ??? ??? ?3 Receiving \u6240\u6709\u54cd\u5e94\u5934\u90e8\u90fd\u5df2\u7ecf\u63a5\u6536\u5230\u3002\u54cd\u5e94\u4f53\u5f00\u59cb\u63a5\u6536\u4f46\u672a\u5b8c\u6210\u3002
\n?? ??? ??? ??? ?4 Loaded HTTP \u54cd\u5e94\u5df2\u7ecf\u5b8c\u5168\u63a5\u6536\u3002<\/p>\n
\n??????????? function Mycallback(){??? \/\/\u81ea\u5b9a\u4e49\u7684\u56de\u8c03\u51fd\u6570
\n???????????? if(xmlhttp.readyState == 4){?
\n???????????????? if(xmlhttp.status == 200){?
\n????????
\n???????????????????? resultNode.innerHTML = xmlhttp.responseText;?
\n???????????????? } else{?
\n???????????????????? resultNode.innerHTML = “\u670d\u52a1\u5668\u6545\u969c”;?
\n??????????????? }?
\n???????????? }?
\n??????? }
\n? ? ? ?
\n?? \u6ce8\uff1astatus \u8bf4\u660e\uff1a\u7531\u670d\u52a1\u5668\u8fd4\u56de\u7684 HTTP \u72b6\u6001\u4ee3\u7801\u3002
\n???????? statusText \u8bf4\u660e\uff1a\u8fd9\u4e2a\u5c5e\u6027\u7528\u540d\u79f0\u800c\u4e0d\u662f\u6570\u5b57\u6307\u5b9a\u4e86\u8bf7\u6c42\u7684 HTTP \u7684\u72b6\u6001\u4ee3\u7801
\n???????? xmlhttp.status == 200 \u67e5\u770b\u6570\u636e\u5728\u5728\u7f51\u7edc\u4f20\u8f93\u8fc7\u7a0b\u7684\u72b6\u6001\uff0cxmlhttp.status \u7b49\u4e8e200\u65f6\u8868\u793a\u4f20\u8f93\u8fc7\u7a0b\u5b8c\u6574\u6ca1\u6709\u9519\u8bef\uff0c\u5176\u5b83\u7684\u60c5\u51b5\u53ef\u80fd\u6709\u5728\u7f51\u7edc\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u51fa\u9519\u6216\u8005\u6307\u5b9a\u7684\u5730\u5740\u5931\u6548.\u5e38\u7528\u7684\u72b6\u6001\u7801\u6709\uff1a
\n????? ? \u25c6200 (OK): \u627e\u5230\u4e86\u8be5\u8d44\u6e90\uff0c\u5e76\u4e14\u4e00\u5207\u6b63\u5e38\u3002
\n??? ?? ?\u25c6304 (NOT MODIFIED): \u8be5\u8d44\u6e90\u5728\u4e0a\u6b21\u8bf7\u6c42\u4e4b\u540e\u6ca1\u6709\u4efb\u4f55\u4fee\u6539\u3002\u8fd9\u901a\u5e38\u7528\u4e8e\u6d4f\u89c8\u5668\u7684\u7f13\u5b58\u673a\u5236\u3002
\n????? ? \u25c6 401 (UNAUTHORIZED): \u5ba2\u6237\u7aef\u65e0\u6743\u8bbf\u95ee\u8be5\u8d44\u6e90\u3002\u8fd9\u901a\u5e38\u4f1a\u4f7f\u5f97\u6d4f\u89c8\u5668\u8981\u6c42\u7528\u6237\u8f93\u5165\u7528\u6237\u540d\u548c\u5bc6\u7801\uff0c\u4ee5\u767b\u5f55\u5230\u670d\u52a1\u5668\u3002
\n??? ?? ?\u25c6403 (FORBIDDEN): \u5ba2\u6237\u7aef\u672a\u80fd\u83b7\u5f97\u6388\u6743\u3002\u8fd9\u901a\u5e38\u662f\u5728401\u4e4b\u540e\u8f93\u5165\u4e86\u4e0d\u6b63\u786e\u7684\u7528\u6237\u540d\u6216\u5bc6\u7801\u3002
\n??? ?? ?\u25c6404 (NOT FOUND): \u5728\u6307\u5b9a\u7684\u4f4d\u7f6e\u4e0d\u5b58\u5728\u6240\u7533\u8bf7\u7684\u8d44\u6e90\u3002<\/p>\n
\n??????????? xmlHttp.open(“GET”, url , true)
\n??????????
\n??????????? oXMLHttpRequest.open(bstrMethod, bstrUrl, varAsync, bstrUser, bstrPassword);<\/p>\n
\n?? ??? ??? ??? ??? ?bstrMethod\uff1ahttp\u65b9\u6cd5\uff0c\u4f8b\u5982\uff1aPOST\u3001GET\u3001PUT\u53caPROPFIND\u3002\u5927\u5c0f\u5199\u4e0d\u654f\u611f\u3002
\n?? ??? ??? ??? ??? ?bstrUrl? \u8bf7\u6c42\u7684URL\u5730\u5740\uff0c\u53ef\u4ee5\u4e3a\u7edd\u5bf9\u5730\u5740\u4e5f\u53ef\u4ee5\u4e3a\u76f8\u5bf9\u5730\u5740\u3002
\n?? ??? ??? ??? ??? ?varAsync[\u53ef\u9009<\/strong>]\uff1a \u5e03\u5c14\u578b\uff0c\u6307\u5b9a\u6b64\u8bf7\u6c42\u662f\u5426\u4e3a\u5f02\u6b65\u65b9\u5f0f\uff0c\u9ed8\u8ba4\u4e3atrue\u3002\u5982\u679c\u4e3a\u771f\uff0c\u5f53\u72b6\u6001\u6539\u53d8\u65f6\u4f1a\u8c03\u7528?? ??? ??? ??? ?onreadystatechange\u5c5e\u6027\u6307\u5b9a\u7684\u56de\u8c03\u51fd\u6570\u3002\u4e5f\u5c31\u662f\u8bf4\u5f53true\u65f6\u5b9a\u4e49\u63a5\u53d7\u670d\u52a1\u5668\u54cd\u5e94\u7ed3\u679c\u7684\u51fd\u6570–\u56de\u8c03\u51fd\u6570\u624d\u6709\u6548
\n???????????? \u56e0ajax\u4e3b\u8981\u5229\u7528\u5f02\u6b65\uff0c\u540c\u6b65\u76f4\u63a5\u63d0\u4ea4\u8868\u5355\u5c31\u53ef\u5b8c\u5728\uff0c\u4e0d\u9700ajax\uff0c\u6545\u53ef\u4e3aopen( “GET”,url ) \u9ed8\u8ba4\u4e3atrue
\n?? ??? ??? ??? ??? ?bstrUser[\u53ef\u9009<\/strong>] \uff1a\u5982\u679c\u670d\u52a1\u5668\u9700\u8981\u9a8c\u8bc1\uff0c\u6b64\u5904\u6307\u5b9a\u7528\u6237\u540d\uff0c\u5982\u679c\u672a\u6307\u5b9a\uff0c\u5f53\u670d\u52a1\u5668\u9700\u8981\u9a8c\u8bc1\u65f6\uff0c\u4f1a\u5f39\u51fa\u9a8c\u8bc1\u7a97\u53e3\u3002
\n?? ??? ??? ??? ??? ?bstrPassword[\u53ef\u9009<\/strong>]\uff1a\u9a8c\u8bc1\u4fe1\u606f\u4e2d\u7684\u5bc6\u7801\u90e8\u5206\uff0c\u5982\u679c\u7528\u6237\u540d\u4e3a\u7a7a\uff0c\u5219\u6b64\u503c\u5c06\u88ab\u5ffd\u7565\u3002
\n?????
\n? ?? 3\uff09\u6267\u884c
\n?????????? xmlHttp.send (varBody? );?? varBody:\u6b32\u901a\u8fc7\u6b64\u8bf7\u6c42\u53d1\u9001\u7684\u6570\u636e\u3002
\n?????????? \u6b64\u65b9\u6cd5\u7684\u540c\u6b65\u6216\u5f02\u6b65\u65b9\u5f0f\u53d6\u51b3\u4e8eopen\u65b9\u6cd5\u4e2d\u7684bAsync\u53c2\u6570\uff0c\u5982\u679cbAsync == False\uff0c\u6b64\u65b9\u6cd5\u5c06\u4f1a\u7b49\u5f85\u8bf7\u6c42\u5b8c\u6210\u6216\u8005\u8d85\u65f6\u65f6\u624d\u4f1a\u8fd4\u56de\uff0c\u5982\u679cbAsync == True\uff0c\u6b64\u65b9\u6cd5\u5c06\u7acb\u5373\u8fd4\u56de
\n?????????? varBody\u4e3a\u4f20\u9001\u7684\u6570\u636e\uff0c\u5f53open\u65b9\u6cd5\u4e3aget\u65f6\uff0c\u53c2\u6570\u5728url\u4e2d\u6307\u5b9a\uff0c\u5f53\u65b9\u5f0f\u4e3apost\u65f6\uff0c\u53c2\u6570\u5e94\u5b58\u653e\u5728\u8bf7\u6c42\u6570\u636e\u4e2d\uff0c\u76ee\u524d\u81ea\u5b9a\u4e49\u53d1\u9001\u5b58\u5165\u8bf7\u6c42\u6570\u636e\u7684\u8fc7\u7a0b\u5c31\u662f\u7528varBody\u6307\u5b9a\u3002\u53ef\u77e5\u5f53\u4e3aget\u65f6,send\u4f20\u7a7a\u5373\uff1axmlHttp.send( “” );
\n????????? \u5982\uff1a
\n????????? xmlHttpRequest.open(“POST”,”login.jsp”,true);
\n\u3000?? \u3000xmlHttpRequest.setRequestHeder(“Content-Type”,”application\/x-www-form<\/strong>-urlencoded;charset=UTF-8″);
\n????????????????? \/\/\u4f7f\u7528send\u65b9\u6cd5\u4f20\u9012\u53c2\u6570\u4f7f\u7528\u7684\u662fPOST\u65b9\u6cd5\uff0c\u9700\u8981\u8bbe\u5b9aContent-Type\u5934\u4fe1\u606f\uff0c\u6a21\u62dfHTTP POST\u65b9\u6cd5\u53d1\u9001 \u4e00\u4e2a\u8868\u5355\uff0c\u8fd9\u6837\u670d\u52a1\u5668\u624d\u4f1a\u77e5\u9053\u5982\u4f55\u5904\u7406\u4e0a\u4f20\u7684\u5185\u5bb9\u3002
\n\u3000\u3000?? xmlHttpRequest.send(“user=”+username+”&pwd=”+password);
\n????????
\n????? \u6ce8\uff1axmlHttp.send(“”);\u5982\u679c\u5199\u6210xmlHttp.send(); \u6216 xmlHttp.send(null);FireFox\u4e0d\u652f\u6301\u3002<\/p>\n
\n??????????? \u7f16\u5199\u5904\u7406\u51fd\u6570\uff0c\u5e76\u5c06\u7ed3\u679c\u8fd4\u56de
\n?????????????? doGet(){
\n??????????? response.setContentType(“text\/html;charset=GB2312”);?
\n? ? ? ? ? ? PrintWriter out = response.getWriter();?
\n??????????? out.println(“<b>hello ajax<\/b>”);????
\n? ? ? ? ? \/\/\u4ee5\u4e0a\u662fservlet\u5f62\u5f0f\uff0c\u9700\u8981\u624b\u52a8\u8bbe\u7f6e\u8fd4\u56de\u683c\u5f0f\uff0c\u800c\u5728struts\u4e2d\u7528return success\u8f6c\u5230\u67d0\u4e00\u9875\u9762\uff0c\u6b64\u9875\u9762\u53ea\u662f\u4fe1? \u606f\u3002\u56e0\u4e3a\u5f53\u524d\u4f1a\u63a5\u53d7\u8fd9\u4e9b\u4fe1\u606f\uff0c\u800c\u4e0d\u662f\u7528\u6765\u8f6c\u5230\u67d0\u4e00\u9875\u9762\u3002 ?????????????????
\n}
\n????????? \u5728\u56de\u8c03\u51fd\u6570\u4e2d\u63a5\u6536:
\n?????????????? document.getElementById(“txtHint”).innerHTML = xmlhttp.responseText;?
\n?????? ? \u5c5e\u6027 : responseText? \u670d\u52a1\u5668\u8fd4\u56de\u7684\u6587\u672c\u5185\u5bb9
\n????????????????? responseXML \u670d\u52a1\u5668\u8fd4\u56de\u7684\u517c\u5bb9DOM\u7684XML\u5185\u5bb9
\n????????????????? statusText???? \u670d\u52a1\u5668\u8fd4\u56de\u72b6\u6001\u7801\u7684\u6587\u672c\u4fe1\u606f<\/p>\n","protected":false},"excerpt":{"rendered":"