{"id":154354,"date":"2024-05-08T11:30:52","date_gmt":"2024-05-08T03:30:52","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/154354.html"},"modified":"2024-05-08T11:30:55","modified_gmt":"2024-05-08T03:30:55","slug":"%e5%8e%9f%e7%94%9f-javascript-%e5%a6%82%e4%bd%95%e5%ae%9e%e7%8e%b0-ajax-%e7%9a%84-get-%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/154354.html","title":{"rendered":"\u539f\u751f javascript \u5982\u4f55\u5b9e\u73b0 AJAX \u7684 get \u65b9\u6cd5"},"content":{"rendered":"

\"\u539f\u751f<\/p>\n

\u5b9e\u73b0AJAX\u7684GET\u65b9\u6cd5\u4e3b\u8981\u901a\u8fc7JavaScript\u7684XMLHttpRequest<\/code>\u5bf9\u8c61\u5b8c\u6210\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u6d89\u53ca\u521b\u5efa\u4e00\u4e2aXMLHttpRequest<\/code>\u5bf9\u8c61\u3001\u914d\u7f6eHTTP\u8bf7\u6c42\u7684\u7c7b\u578b\u548cURL\u3001\u53d1\u9001\u8bf7\u6c42\u4ee5\u53ca\u5904\u7406\u54cd\u5e94\u3002\u6838\u5fc3\u6b65\u9aa4\u5305\u62ec\uff1a\u521b\u5efaXMLHttpRequest<\/code>\u5bf9\u8c61\u3001\u914d\u7f6eGET\u8bf7\u6c42\u3001\u5904\u7406\u54cd\u5e94\u6570\u636e<\/strong>\u3002\u5176\u4e2d\uff0c\u521b\u5efa\u548c\u914d\u7f6eXMLHttpRequest<\/code>\u5bf9\u8c61<\/strong>\u662f\u5173\u952e\u7684\u7b2c\u4e00\u6b65\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u521b\u5efaXMLHTTPREQUEST\u5bf9\u8c61<\/h3>\n<\/p>\n

\u5728JavaScript\u4e2d\uff0c\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u5f02\u6b65\u4ea4\u4e92\u7684\u91cd\u5fc3\u843d\u5728XMLHttpRequest<\/code>\u5bf9\u8c61\u4e0a\u3002\u8fd9\u4e00\u5bf9\u8c61\u63d0\u4f9b\u4e86\u5728\u5ba2\u6237\u7aef\u4e0e\u670d\u52a1\u5668\u4e4b\u95f4\u4ea4\u6362\u6570\u636e\u7684\u80fd\u529b\uff0c\u800c\u4e0d\u4f1a\u5bfc\u81f4\u9875\u9762\u91cd\u65b0\u52a0\u8f7d\u3002\u4e3a\u4e86\u4f7f\u7528AJAX\u7684GET\u65b9\u6cd5\uff0c\u9996\u5148\u9700\u8981\u521b\u5efa\u4e00\u4e2aXMLHttpRequest<\/code>\u5bf9\u8c61\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n

var xhr = new XMLHttpRequest();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6bb5\u4ee3\u7801\u7247\u6bb5\u975e\u5e38\u5173\u952e\uff0c\u5b83\u662f\u5b9e\u73b0AJAX\u8bf7\u6c42\u7684\u57fa\u7840\u3002\u521b\u5efa\u4e86XMLHttpRequest<\/code>\u5bf9\u8c61\u540e\uff0c\u5c31\u53ef\u4ee5\u914d\u7f6e\u8bf7\u6c42\uff0c\u5e76\u5411\u670d\u52a1\u5668\u53d1\u9001\u5b83\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u914d\u7f6eGET\u8bf7\u6c42<\/h3>\n<\/p>\n
\u914d\u7f6eGET\u8bf7\u6c42\u9700\u8981\u4f7f\u7528\u5230XMLHttpRequest\u5bf9\u8c61\u7684open<\/code>\u65b9\u6cd5\u3002\u8fd9\u4e00\u65b9\u6cd5\u63a5\u53d7\u81f3\u5c11\u4e24\u4e2a\u53c2\u6570\uff1a\u8bf7\u6c42\u7684\u7c7b\u578b\uff08"GET"\uff09\u548c\u8bf7\u6c42\u7684URL\u3002\u6b64\u5916\uff0c\u8fd8\u6709\u53e6\u5916\u4e24\u4e2a\u53ef\u9009\u53c2\u6570\uff1a\u8bf7\u6c42\u662f\u5426\u5f02\u6b65\u5904\u7406\uff0c\u9ed8\u8ba4\u4e3atrue<\/code>\uff0c\u4ee5\u53ca\u53ef\u9009\u7684\u7528\u6237\u540d\u548c\u5bc6\u7801\u7528\u4e8eHTTP\u8ba4\u8bc1\u3002<\/p>\n<\/p>\n
xhr.open('GET', 'https:\/\/api.example.com\/data', true);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u91cc\uff0c\u901a\u8fc7open<\/code>\u65b9\u6cd5\u6307\u5b9a\u4e86\u8bf7\u6c42\u7684\u7c7b\u578b\u4e3a"GET"\uff0c\u6307\u5411\u4e86\u76ee\u6807URL\uff0c\u5e76\u4e14\u6307\u5b9a\u8bf7\u6c42\u5e94\u8be5\u5f02\u6b65\u8fdb\u884c\u3002\u8fd9\u662f\u8bbe\u7f6eGET\u8bf7\u6c42\u7684\u5fc5\u8981\u6b65\u9aa4\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u53d1\u9001\u8bf7\u6c42<\/h3>\n<\/p>\n
\u4e00\u65e6\u914d\u7f6e\u597dGET\u8bf7\u6c42\uff0c\u4e0b\u4e00\u6b65\u5c31\u662f\u53d1\u9001\u5b83\u3002\u5728\u53d1\u9001\u8bf7\u6c42\u4e4b\u524d\uff0c\u4f60\u8fd8\u53ef\u4ee5\u8bbe\u7f6e\u4e00\u4e9b\u8bf7\u6c42\u5934\u4fe1\u606f\uff0c\u6216\u8005\u5904\u7406\u5373\u5c06\u63a5\u6536\u7684\u54cd\u5e94\u6570\u636e\u7684\u7c7b\u578b\uff0c\u4f46\u5bf9\u4e8eGET\u8bf7\u6c42\u6765\u8bf4\uff0c\u8fd9\u901a\u5e38\u4e0d\u662f\u5fc5\u9700\u7684\u3002\u53d1\u9001\u8bf7\u6c42\u975e\u5e38\u7b80\u5355\uff0c\u53ea\u9700\u8c03\u7528XMLHttpRequest<\/code>\u5bf9\u8c61\u7684send<\/code>\u65b9\u6cd5\u5373\u53ef\u3002<\/p>\n<\/p>\n
xhr.send();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u5904\u7406\u54cd\u5e94<\/h3>\n<\/p>\n
\u53d1\u9001\u8bf7\u6c42\u540e\uff0c\u670d\u52a1\u5668\u5c06\u56de\u5e94\u8bf7\u6c42\uff0c\u5e76\u8fd4\u56de\u6570\u636e\u3002\u4e3a\u4e86\u5904\u7406\u8fd9\u4e9b\u6570\u636e\uff0c\u9700\u8981\u8bbe\u5b9a\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\u6765\u76d1\u542creadystatechange<\/code>\u4e8b\u4ef6\u3002\u8fd9\u4e2a\u4e8b\u4ef6\u6bcf\u5f53readyState<\/code>\u5c5e\u6027\u6539\u53d8\u65f6\u89e6\u53d1\uff0c\u800creadyState<\/code>\u5c5e\u6027\u8868\u793a\u8bf7\u6c42\/\u54cd\u5e94\u8fc7\u7a0b\u7684\u5f53\u524d\u6d3b\u52a8\u9636\u6bb5\u3002<\/p>\n<\/p>\n
xhr.onreadystatechange = function() {<\/p>\n
    if (xhr.readyState == 4 && xhr.status == 200) {<\/p>\n
        \/\/ \u5f53\u8bf7\u6c42\u5b8c\u6210\u4e14\u54cd\u5e94\u4ee3\u7801\u4e3a200\u65f6\uff0c\u5904\u7406\u54cd\u5e94<\/p>\n
        console.log(xhr.responseText);<\/p>\n
    }<\/p>\n
};<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u6bb5\u4ee3\u7801\u4e2d\uff0c\u901a\u8fc7\u68c0\u67e5XMLHttpRequest<\/code>\u5bf9\u8c61\u7684readyState<\/code>\u5c5e\u6027\u662f\u5426\u7b49\u4e8e4\uff08\u8868\u793a\u8bf7\u6c42\u5df2\u5b8c\u6210\u4e14\u54cd\u5e94\u5df2\u5c31\u7eea\uff09\uff0c\u5e76\u4e14\u786e\u8ba4status<\/code>\u5c5e\u6027\u4e3a200\uff08\u8868\u793a\u8bf7\u6c42\u6210\u529f\uff09\uff0c\u6765\u786e\u5b9a\u4ec0\u4e48\u65f6\u5019\u5904\u7406\u54cd\u5e94\u4f53\u3002\u5f53\u6ee1\u8db3\u8fd9\u4e9b\u6761\u4ef6\u65f6\uff0cresponseText<\/code>\u5c5e\u6027\u4f1a\u5305\u542b\u6765\u81ea\u670d\u52a1\u5668\u7684\u54cd\u5e94\u6570\u636e\u3002<\/p>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u539f\u751fJavaScript\u5b9e\u73b0AJAX\u7684GET\u65b9\u6cd5\uff0c\u4ece\u800c\u5b9e\u73b0\u5728\u4e0d\u91cd\u65b0\u52a0\u8f7d\u6574\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0e\u670d\u52a1\u5668\u4ea4\u6362\u6570\u636e\u3002\u8fd9\u79cd\u6280\u672f\u7684\u5e94\u7528\u975e\u5e38\u5e7f\u6cdb\uff0c\u5305\u62ec\u5728\u586b\u5199\u8868\u5355\u65f6\u8fdb\u884c\u6570\u636e\u9a8c\u8bc1\u3001\u52a0\u8f7d\u66f4\u591a\u5185\u5bb9\u7b49\u573a\u666f\u4e2d\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u4f7f\u7528\u539f\u751f JavaScript \u5b9e\u73b0 AJAX \u7684 GET \u8bf7\u6c42\uff1f<\/strong><\/p>\n
\u4f7f\u7528\u539f\u751f JavaScript \u5b9e\u73b0 AJAX \u7684 GET \u65b9\u6cd5\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u5b8c\u6210\uff1a<\/p>\n
\u6b65\u9aa4\u4e00\uff1a\u521b\u5efa\u4e00\u4e2a XMLHttpRequest \u5bf9\u8c61\u3002<\/p>\n
var xhttp = new XMLHttpRequest();\n<\/code><\/pre>\n
\u6b65\u9aa4\u4e8c\uff1a\u5b9a\u4e49\u5904\u7406\u670d\u52a1\u5668\u54cd\u5e94\u7684\u56de\u8c03\u51fd\u6570\u3002<\/p>\n
xhttp.onreadystatechange = function() {\n    if (this.readyState == 4 && this.status == 200) {\n        \/\/ \u5904\u7406\u8fd4\u56de\u7684\u6570\u636e\n        console.log(this.responseText);\n    }\n};\n<\/code><\/pre>\n
\u6b65\u9aa4\u4e09\uff1a\u901a\u8fc7 open() \u65b9\u6cd5\u8bbe\u7f6e\u8bf7\u6c42\u7c7b\u578b\u548c URL\u3002<\/p>\n
xhttp.open("GET", "your_url", true);\n<\/code><\/pre>\n
\u6b65\u9aa4\u56db\uff1a\u53d1\u9001 AJAX \u8bf7\u6c42\u3002<\/p>\n
xhttp.send();\n<\/code><\/pre>\n
2. \u539f\u751f JavaScript \u5982\u4f55\u5904\u7406 AJAX GET \u8bf7\u6c42\u7684\u8fd4\u56de\u6570\u636e\uff1f<\/strong><\/p>\n
\u5728\u539f\u751f JavaScript \u4e2d\u5904\u7406 AJAX GET \u8bf7\u6c42\u8fd4\u56de\u7684\u6570\u636e\u53ef\u4ee5\u901a\u8fc7\u5728 XMLHttpRequest<\/code> \u5bf9\u8c61\u7684 onreadystatechange<\/code> \u4e8b\u4ef6\u4e2d\u68c0\u67e5 readyState<\/code> \u548c status<\/code> \u5c5e\u6027\u6765\u5b9e\u73b0\u3002<\/p>\n
\u5728 readyState<\/code> \u7684\u503c\u4e3a 4\uff0c\u8868\u793a\u8bf7\u6c42\u5df2\u5b8c\u6210\uff0c\u800c status<\/code> \u7684\u503c\u4e3a 200\uff0c\u5219\u8868\u793a\u8bf7\u6c42\u6210\u529f\u3002\u8fd9\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7 responseText<\/code> \u5c5e\u6027\u83b7\u53d6\u670d\u52a1\u5668\u8fd4\u56de\u7684\u6570\u636e\u3002<\/p>\n
xhttp.onreadystatechange = function() {\n    if (this.readyState == 4 && this.status == 200) {\n        \/\/ \u5904\u7406\u8fd4\u56de\u7684\u6570\u636e\n        console.log(this.responseText);\n    }\n};\n<\/code><\/pre>\n
\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u8fdb\u4e00\u6b65\u5904\u7406\u8fd4\u56de\u7684\u6570\u636e\uff0c\u4f8b\u5982\u5c06\u6570\u636e\u663e\u793a\u5728\u9875\u9762\u4e0a\u3001\u66f4\u65b0\u9875\u9762\u5185\u5bb9\u7b49\u64cd\u4f5c\u3002<\/p>\n
3. AJAX \u7684 GET \u65b9\u6cd5\u5982\u4f55\u5728\u539f\u751f JavaScript \u4e2d\u4f20\u9012\u53c2\u6570\uff1f<\/strong><\/p>\n
\u5728\u539f\u751f JavaScript \u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u5c06\u53c2\u6570\u6dfb\u52a0\u5230 URL \u7684\u67e5\u8be2\u5b57\u7b26\u4e32\u4e2d\u6765\u5b9e\u73b0 AJAX \u7684 GET \u65b9\u6cd5\u4f20\u9012\u53c2\u6570\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5047\u8bbe\u8981\u5411\u670d\u52a1\u5668\u53d1\u9001\u4e00\u4e2a GET \u8bf7\u6c42\uff0c\u9644\u5e26\u53c2\u6570 name<\/code> \u548c age<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801\uff1a<\/p>\n
var name = "John";\nvar age = 30;\nvar url = "your_server_url?name=" + encodeURIComponent(name) + "&age=" + encodeURIComponent(age);\nxhttp.open("GET", url, true);\n<\/code><\/pre>\n
\u5176\u4e2d\uff0c\u4f7f\u7528 encodeURIComponent()<\/code> \u51fd\u6570\u6765\u786e\u4fdd\u53c2\u6570\u503c\u7684\u5b89\u5168\u4f20\u9012\u3002\u670d\u52a1\u5668\u7aef\u53ef\u4ee5\u4f7f\u7528\u76f8\u5e94\u7684\u65b9\u6cd5\u6765\u83b7\u53d6\u4f20\u9012\u8fc7\u6765\u7684\u53c2\u6570\u503c\uff0c\u5e76\u8fdb\u884c\u5904\u7406\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5b9e\u73b0AJAX\u7684GET\u65b9\u6cd5\u4e3b\u8981\u901a\u8fc7JavaScript\u7684XMLHttpRequest\u5bf9\u8c61\u5b8c\u6210\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u6d89\u53ca\u521b\u5efa\u4e00 […]","protected":false},"author":3,"featured_media":154356,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/154354"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=154354"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/154354\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/154356"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=154354"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=154354"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=154354"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}