{"id":1425,"date":"2023-05-30T22:07:32","date_gmt":"2023-05-30T14:07:32","guid":{"rendered":"https:\/\/fireinsect.top\/?p=1425"},"modified":"2023-12-19T17:22:13","modified_gmt":"2023-12-19T09:22:13","slug":"springcloud%e5%9f%ba%e7%a1%80%ef%bc%886%ef%bc%89-openfeign%e4%b8%8e%e7%86%94%e6%96%ad%e5%92%8c%e9%99%8d%e7%ba%a7","status":"publish","type":"post","link":"https:\/\/fireinsect.top\/index.php\/2023\/05\/30\/springcloud%e5%9f%ba%e7%a1%80%ef%bc%886%ef%bc%89-openfeign%e4%b8%8e%e7%86%94%e6%96%ad%e5%92%8c%e9%99%8d%e7%ba%a7\/","title":{"rendered":"SpringCloud\u57fa\u7840\uff086\uff09&#8211; OpenFeign\u4e0e\u7194\u65ad\u548c\u964d\u7ea7"},"content":{"rendered":"\n<p>Feign\u548cRestTemplate\u4e00\u6837\uff0c\u4e5f\u662fHTTP\u5ba2\u6237\u7aef\u8bf7\u6c42\u5de5\u5177\uff0c\u4f46\u662f\u5b83\u7684\u4f7f\u7528\u65b9\u5f0f\u66f4\u52a0\u4fbf\u6377\u3002\u672c\u7ae0\uff0c\u6211\u4eec\u5b66\u4e60OpenFeign\u4ee5\u53ca\u670d\u52a1\u7194\u65ad\u548c\u964d\u7ea7\u7684\u6982\u5ff5<\/p>\n\n\n\n<!--more-->\n\n\n\n<p>\u9996\u5148\u6211\u4eec\u6dfb\u52a0\u4f9d\u8d56<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"xml\" class=\"language-xml\">&lt;dependency&gt;\n    &lt;groupId&gt;org.springframework.cloud&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-cloud-starter-openfeign&lt;\/artifactId&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n\n\n\n<p>\u5728\u542f\u52a8\u7c7b\u6dfb\u52a0\u6ce8\u89e3<code>@EnableFeignClients<\/code>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">@SpringBootApplication\n@EnableFeignClients\npublic class BorrowApplication {\n    public static void main(String[] args) {\n        SpringApplication.run(BorrowApplication.class, args);\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u90a3\u4e48\u5982\u679c\u6211\u4eec\u9700\u8981\u8c03\u7528\u5176\u4ed6\u5fae\u670d\u52a1\u63d0\u4f9b\u7684\u63a5\u53e3,\u76f4\u63a5\u521b\u5efa\u8be5\u670d\u52a1\u5bf9\u5e94\u7684\u63a5\u53e3\u7c7b\u5373\u53ef\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">@FeignClient(\"userservice\")   \/\/\u58f0\u660e\u4e3auserservice\u670d\u52a1\u7684HTTP\u8bf7\u6c42\u5ba2\u6237\u7aef\npublic interface UserClient {\n    \/\/\u8def\u5f84\u4fdd\u8bc1\u548c\u5176\u4ed6\u5fae\u670d\u52a1\u63d0\u4f9b\u7684\u4e00\u81f4\u5373\u53ef\n    @RequestMapping(\"\/user\/{uid}\")\n    User getUserById(@PathVariable(\"uid\") int uid);  \/\/\u53c2\u6570\u548c\u8fd4\u56de\u503c\u4e5f\u4fdd\u6301\u4e00\u81f4\n}<\/code><\/pre>\n\n\n\n<p>\u4e0a\u9762\u6211\u4eec\u7684\u501f\u9605\u670d\u52a1\u9700\u8981\u4f7f\u7528\u5230\u7528\u6237\u670d\u52a1\u63a5\u53e3\uff0c\u6211\u4eec\u53ea\u9700\u8981\u521b\u5efaUserClient\u63a5\u53e3\u7c7b\u5e76\u8fdb\u884c\u914d\u7f6e\u5373\u53ef\u3002<\/p>\n\n\n\n<p>\u8fd9\u6837\u6211\u4eec\u76f4\u63a5\u8c03\u7528\u8fd9\u4e2a\u63a5\u53e3\u5373\u53ef\u5b9e\u73b0\u63a5\u53e3\u8c03\u7528\uff0c\u5e76\u540c\u65f6\u4f1a\u5b9e\u73b0\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"has-vivid-red-color has-text-color has-large-font-size\" id=\"rd\">\u670d\u52a1\u7194\u65ad\u548c\u964d\u7ea7<\/p>\n\n\n\n<p>\u6211\u4eec\u77e5\u9053\uff0c\u5fae\u670d\u52a1\u4e4b\u95f4\u662f\u53ef\u4ee5\u8fdb\u884c\u76f8\u4e92\u8c03\u7528\u7684\uff0c\u90a3\u4e48\u5982\u679c\u51fa\u73b0\u4e86\u4e0b\u9762\u7684\u60c5\u51b5\u4f1a\u5bfc\u81f4\u4ec0\u4e48\u95ee\u9898\uff1f<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"161\" src=\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dUvO3K8oWMZSVHr.png?resize=1024%2C161&#038;ssl=1\" alt=\"\" class=\"wp-image-1476\" srcset=\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dUvO3K8oWMZSVHr.png?resize=1024%2C161&amp;ssl=1 1024w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dUvO3K8oWMZSVHr.png?resize=300%2C47&amp;ssl=1 300w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dUvO3K8oWMZSVHr.png?resize=768%2C121&amp;ssl=1 768w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dUvO3K8oWMZSVHr.png?resize=1536%2C241&amp;ssl=1 1536w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dUvO3K8oWMZSVHr.png?w=1960&amp;ssl=1 1960w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u7531\u4e8e\u4f4d\u4e8e\u6700\u5e95\u7aef\u7684\u670d\u52a1\u63d0\u4f9b\u8005E\u53d1\u751f\u6545\u969c\uff0c\u90a3\u4e48\u6b64\u65f6\u4f1a\u76f4\u63a5\u5bfc\u81f4\u670d\u52a1ABCD\u5168\u7ebf\u5d29\u6e83\uff0c\u5c31\u50cf\u96ea\u5d29\u4e86\u4e00\u6837\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"173\" src=\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dDMylZ5ejKoxAVF.png?resize=1024%2C173&#038;ssl=1\" alt=\"\" class=\"wp-image-1478\" srcset=\"https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dDMylZ5ejKoxAVF.png?resize=1024%2C173&amp;ssl=1 1024w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dDMylZ5ejKoxAVF.png?resize=300%2C51&amp;ssl=1 300w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dDMylZ5ejKoxAVF.png?resize=768%2C130&amp;ssl=1 768w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dDMylZ5ejKoxAVF.png?resize=1536%2C260&amp;ssl=1 1536w, https:\/\/i2.wp.com\/fireinsect.top\/wp-content\/uploads\/2023\/12\/dDMylZ5ejKoxAVF.png?w=1950&amp;ssl=1 1950w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<p>\u8fd9\u79cd\u95ee\u9898\u5b9e\u9645\u4e0a\u662f\u4e0d\u53ef\u907f\u514d\u7684\uff0c\u7531\u4e8e\u591a\u79cd\u56e0\u7d20\uff0c\u6bd4\u5982\u7f51\u7edc\u5361\u987f\u3001\u7cfb\u7edf\u6545\u969c\u3001\u786c\u4ef6\u95ee\u9898\u7b49\uff0c\u90fd\u5b58\u5728\u4e00\u5b9a\u53ef\u80fd\uff0c\u4f1a\u5bfc\u81f4\u8fd9\u79cd\u6781\u7aef\u7684\u60c5\u51b5\u53d1\u751f\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u5bfb\u627e\u4e00\u4e2a\u5e94\u5bf9\u8fd9\u79cd\u6781\u7aef\u60c5\u51b5\u7684\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n\n\n\n<p>\u4e3a\u4e86\u89e3\u51b3\u5206\u5e03\u5f0f\u7cfb\u7edf\u7684\u96ea\u5d29\u95ee\u9898\uff0cSpringCloud\u63d0\u4f9b\u4e86Hystrix\u7194\u65ad\u5668\u7ec4\u4ef6\uff0c\u4ed6\u5c31\u50cf\u6211\u4eec\u5bb6\u4e2d\u7684\u4fdd\u9669\u4e1d\u4e00\u6837\uff0c\u5f53\u7535\u6d41\u8fc7\u8f7d\u5c31\u4f1a\u76f4\u63a5\u7194\u65ad\uff0c\u9632\u6b62\u5371\u9669\u8fdb\u4e00\u6b65\u53d1\u751f\uff0c\u4ece\u800c\u4fdd\u8bc1\u5bb6\u5ead\u7528\u7535\u5b89\u5168\u3002\u53ef\u4ee5\u60f3\u8c61\u4e00\u4e0b\uff0c\u5982\u679c\u6574\u6761\u94fe\u8def\u4e0a\u7684\u670d\u52a1\u5df2\u7ecf\u5168\u7ebf\u5d29\u6e83\uff0c\u8fd9\u65f6\u8fd8\u5728\u4e0d\u65ad\u5730\u6709\u5927\u91cf\u7684\u8bf7\u6c42\u5230\u8fbe\uff0c\u9700\u8981\u5404\u4e2a\u670d\u52a1\u8fdb\u884c\u5904\u7406\uff0c\u80af\u5b9a\u662f\u4f1a\u4f7f\u5f97\u60c5\u51b5\u8d8a\u6765\u8d8a\u7cdf\u7cd5\u7684\u3002<\/p>\n\n\n\n<p>\u9996\u5148\u6211\u4eec\u6765\u770b\u770b\u670d\u52a1\u964d\u7ea7\uff0c\u6ce8\u610f\u4e00\u5b9a\u8981\u533a\u5206\u5f00\u670d\u52a1\u964d\u7ea7\u548c\u670d\u52a1\u7194\u65ad\u7684\u533a\u522b\uff0c\u670d\u52a1\u964d\u7ea7\u5e76\u4e0d\u4f1a\u76f4\u63a5\u8fd4\u56de\u9519\u8bef\uff0c\u800c\u662f\u53ef\u4ee5\u63d0\u4f9b\u4e00\u4e2a\u8865\u6551\u63aa\u65bd\uff0c\u6b63\u5e38\u54cd\u5e94\u7ed9\u8bf7\u6c42\u8005\u3002\u8fd9\u6837\u76f8\u5f53\u4e8e\u670d\u52a1\u4f9d\u7136\u53ef\u7528\uff0c\u4f46\u662f\u670d\u52a1\u80fd\u529b\u80af\u5b9a\u662f\u4e0b\u964d\u4e86\u7684\u3002<\/p>\n\n\n\n<p>\u7194\u65ad\u673a\u5236\u662f\u5e94\u5bf9\u96ea\u5d29\u6548\u5e94\u7684\u4e00\u79cd\u5fae\u670d\u52a1\u94fe\u8def\u4fdd\u62a4\u673a\u5236\uff0c\u5f53\u68c0\u6d4b\u51fa\u94fe\u8def\u7684\u67d0\u4e2a\u5fae\u670d\u52a1\u4e0d\u53ef\u7528\u6216\u8005\u54cd\u5e94\u65f6\u95f4\u592a\u957f\u65f6\uff0c\u4f1a\u8fdb\u884c\u670d\u52a1\u7684\u964d\u7ea7\uff0c\u8fdb\u800c\u7194\u65ad\u8be5\u8282\u70b9\u5fae\u670d\u52a1\u7684\u8c03\u7528\uff0c\u5feb\u901f\u8fd4\u56de\u201d\u9519\u8bef\u201d\u7684\u54cd\u5e94\u4fe1\u606f\u3002\u5f53\u68c0\u6d4b\u5230\u8be5\u8282\u70b9\u5fae\u670d\u52a1\u54cd\u5e94\u6b63\u5e38\u540e\u6062\u590d\u8c03\u7528\u94fe\u8def\u3002<\/p>\n\n\n\n<p>\u5b9e\u9645\u4e0a\uff0c\u7194\u65ad\u5c31\u662f\u5728\u964d\u7ea7\u7684\u57fa\u7840\u4e0a\u8fdb\u4e00\u6b65\u5347\u7ea7\u5f62\u6210\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u4e00\u6bb5\u65f6\u95f4\u5185\u591a\u6b21\u8c03\u7528\u5931\u8d25\uff0c\u90a3\u4e48\u5c31\u76f4\u63a5\u5347\u7ea7\u4e3a\u7194\u65ad\u3002<\/p>\n\n\n\n<p>\u4f46Hystrix\u7684\u4f9d\u8d56\u5df2\u7ecf\u505c\u6b62\u7ef4\u62a4\uff0c\u56e0\u6b64\u8fd9\u90e8\u5206\u6211\u4eec\u65e5\u540e\u518d\u8c08<\/p>\n\n\n\n<p class=\"has-large-font-size\">OpenFeign\u5b9e\u73b0\u964d\u7ea7<\/p>\n\n\n\n<p>Feign\u90fd\u662f\u4ee5\u63a5\u53e3\u7684\u5f62\u5f0f\u6765\u58f0\u660e\u8fdc\u7a0b\u8c03\u7528\uff0c\u800c\u964d\u7ea7\u7684\u573a\u666f\u57fa\u672c\u662f\u8fdc\u7a0b\u8c03\u7528\u5931\u8d25\uff0c\u90a3\u4e48\u65e2\u7136\u8fdc\u7a0b\u8c03\u7528\u5df2\u7ecf\u5931\u6548\uff0c\u6211\u4eec\u5c31\u81ea\u884c\u5bf9\u5176\u8fdb\u884c\u5b9e\u73b0\uff0c\u521b\u5efa\u4e00\u4e2a\u5b9e\u73b0\u7c7b\uff0c\u5bf9\u539f\u6709\u7684\u63a5\u53e3\u65b9\u6cd5\u8fdb\u884c\u66ff\u4ee3\u65b9\u6848\u5b9e\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">@Component   \/\/\u6ce8\u610f\uff0c\u9700\u8981\u5c06\u5176\u6ce8\u518c\u4e3aBean\uff0cFeign\u624d\u80fd\u81ea\u52a8\u6ce8\u5165\npublic class UserFallbackClient implements UserClient{\n    @Override\n    public User getUserById(int uid) {   \/\/\u8fd9\u91cc\u6211\u4eec\u81ea\u884c\u5bf9\u5176\u8fdb\u884c\u5b9e\u73b0\uff0c\u5e76\u8fd4\u56de\u6211\u4eec\u7684\u66ff\u4ee3\u65b9\u6848\n        User user = new User();\n        user.setName(\"\u6211\u662f\u66ff\u4ee3\u65b9\u6848\");\n        return user;\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u5b9e\u73b0\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5728\u539f\u6709\u7684\u63a5\u53e3\u4e2d\u6307\u5b9a\u5931\u8d25\u66ff\u4ee3\u5b9e\u73b0\u5373\u53ef\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"java\" class=\"language-java\">\/\/fallback\u53c2\u6570\u6307\u5b9a\u4e3a\u6211\u4eec\u521a\u521a\u7f16\u5199\u7684\u5b9e\u73b0\u7c7b\n@FeignClient(value = \"userservice\", fallback = UserFallbackClient.class)\npublic interface UserClient {\n\n    @RequestMapping(\"\/user\/{uid}\")\n    User getUserById(@PathVariable(\"uid\") int uid);\n}<\/code><\/pre>\n\n\n\n<p>\u6700\u540e\u6211\u4eec\u5728\u914d\u7f6e\u6587\u4ef6\u4e2d\u5f00\u542f\u7194\u65ad\u652f\u6301\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"yaml\" class=\"language-yaml\">feign:\n  circuitbreaker:\n    enabled: true<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Feign\u548cRestTemplate\u4e00\u6837\uff0c\u4e5f\u662fHTTP\u5ba2\u6237\u7aef\u8bf7\u6c42\u5de5\u5177\uff0c\u4f46\u662f\u5b83\u7684\u4f7f\u7528\u65b9\u5f0f\u66f4\u52a0\u4fbf\u6377\u3002\u672c\u7ae0\uff0c\u6211\u4eec\u5b66\u4e60 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","footnotes":""},"categories":[6],"tags":[],"class_list":["post-1425","post","type-post","status-publish","format-standard","hentry","category-6"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/1425"}],"collection":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/comments?post=1425"}],"version-history":[{"count":5,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/1425\/revisions"}],"predecessor-version":[{"id":1482,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/posts\/1425\/revisions\/1482"}],"wp:attachment":[{"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/media?parent=1425"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/categories?post=1425"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fireinsect.top\/index.php\/wp-json\/wp\/v2\/tags?post=1425"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}