{"id":8849,"date":"2023-11-28T20:46:09","date_gmt":"2023-11-28T12:46:09","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8849"},"modified":"2023-12-06T16:06:20","modified_gmt":"2023-12-06T08:06:20","slug":"springcloud-zhongloadbalanced-zhu-jie-de-zuo-yong","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/springcloud-zhongloadbalanced-zhu-jie-de-zuo-yong\/","title":{"rendered":"SpringCloud\u4e2d@LoadBalanced\u6ce8\u89e3\u7684\u4f5c\u7528\u662f\u4ec0\u4e48"},"content":{"rendered":"<p>\u5728Spring Cloud\u4e2d\uff0c<code>@LoadBalanced<\/code>\u6ce8\u89e3\u662f\u7528\u4e8e\u5728REST\u6a21\u677f\uff08RestTemplate\uff09\u4e0a\u542f\u7528\u5ba2\u6237\u7aef\u8d1f\u8f7d\u5747\u8861\u7684\u6ce8\u89e3\u3002\u8fd9\u4e2a\u6ce8\u89e3\u901a\u5e38\u7528\u4e8e\u5fae\u670d\u52a1\u67b6\u6784\u4e2d\uff0c\u5176\u4e2d\u670d\u52a1\u6d88\u8d39\u8005\u9700\u8981\u8c03\u7528\u591a\u4e2a\u76f8\u540c\u7684\u670d\u52a1\u63d0\u4f9b\u8005\u5b9e\u4f8b\u4e4b\u4e00\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4\uff0c<code>@LoadBalanced<\/code>\u6ce8\u89e3\u53ef\u4ee5\u5e94\u7528\u5728<code>RestTemplate<\/code> bean\u7684\u914d\u7f6e\u4e0a\uff0c\u4ee5\u4fbf\u5728\u53d1\u8d77HTTP\u8bf7\u6c42\u65f6\uff0c\u8d1f\u8f7d\u5747\u8861\u80fd\u591f\u81ea\u52a8\u9009\u62e9\u4e00\u4e2a\u53ef\u7528\u7684\u670d\u52a1\u5b9e\u4f8b\u3002\u8fd9\u901a\u5e38\u662f\u901a\u8fc7\u670d\u52a1\u53d1\u73b0\u673a\u5236\uff08\u5982Eureka\uff09\u5b9e\u73b0\u7684\uff0c\u5176\u4e2d\u670d\u52a1\u6ce8\u518c\u4e2d\u5fc3\u7ef4\u62a4\u4e86\u6240\u6709\u53ef\u7528\u7684\u670d\u52a1\u5b9e\u4f8b\u7684\u4fe1\u606f\uff0c\u800c<code>@LoadBalanced<\/code>\u5219\u5e2e\u52a9RestTemplate\u5728\u8fd9\u4e9b\u5b9e\u4f8b\u4e4b\u95f4\u8fdb\u884c\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u6f14\u793a\u4e86\u5982\u4f55\u5728Spring Cloud\u4e2d\u4f7f\u7528<code>@LoadBalanced<\/code>\u6ce8\u89e3\uff1a<\/p>\n<pre><code class=\"language-java\">import org.springframework.cloud.client.loadbalancer.LoadBalanced;\nimport org.springframework.context.annotation.Bean;\nimport org.springframework.context.annotation.Configuration;\nimport org.springframework.web.client.RestTemplate;\n\n@Configuration\npublic class MyConfiguration {\n\n    @Bean\n    @LoadBalanced\n    public RestTemplate restTemplate() {\n        return new RestTemplate();\n    }\n}\n<\/code><\/pre>\n<p>\u4e0a\u9762\u7684\u914d\u7f6e\u4f7f\u7528<code>@LoadBalanced<\/code>\u6ce8\u89e3\u6807\u8bb0\u4e86<code>RestTemplate<\/code> bean\u7684\u521b\u5efa\u65b9\u6cd5\u3002\u73b0\u5728\uff0c\u5f53\u4f60\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528\u8fd9\u4e2a<code>RestTemplate<\/code>\u6765\u53d1\u8d77HTTP\u8bf7\u6c42\u65f6\uff0c\u5b83\u5c06\u81ea\u52a8\u4f7f\u7528\u8d1f\u8f7d\u5747\u8861\u7b56\u7565\u9009\u62e9\u53ef\u7528\u7684\u670d\u52a1\u5b9e\u4f8b\u3002<\/p>\n<pre><code class=\"language-java\">@RestController\npublic class MyController {\n\n    @Autowired\n    private RestTemplate restTemplate;\n\n    @GetMapping(&quot;\/invoke-service&quot;)\n    public String invokeService() {\n        \/\/ \u4f7f\u7528\u8d1f\u8f7d\u5747\u8861\u7684 RestTemplate \u53d1\u8d77\u8bf7\u6c42\n        String result = restTemplate.getForObject(&quot;http:\/\/service-provider\/api\/resource&quot;, String.class);\n        return &quot;Result: &quot; + result;\n    }\n}\n<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4f8b\u5b50\u4e2d\uff0c<code>http:\/\/service-provider<\/code> \u662f\u670d\u52a1\u63d0\u4f9b\u8005\u7684\u5e94\u7528\u540d\uff0c\u800c\u4e0d\u662f\u5177\u4f53\u7684\u5b9e\u4f8b\u5730\u5740\u3002<code>@LoadBalanced<\/code>\u6ce8\u89e3\u4f7f\u5f97<code>RestTemplate<\/code>\u80fd\u591f\u901a\u8fc7\u670d\u52a1\u53d1\u73b0\u81ea\u52a8\u9009\u62e9\u4e00\u4e2a\u53ef\u7528\u7684\u670d\u52a1\u5b9e\u4f8b\u3002\u8fd9\u6837\uff0c\u5f53\u6709\u591a\u4e2a\u76f8\u540c\u670d\u52a1\u63d0\u4f9b\u8005\u5b9e\u4f8b\u65f6\uff0c\u8bf7\u6c42\u5c06\u4f1a\u5728\u8fd9\u4e9b\u5b9e\u4f8b\u4e4b\u95f4\u5206\u5e03\uff0c\u5b9e\u73b0\u4e86\u8d1f\u8f7d\u5747\u8861\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Spring Cloud\u4e2d\uff0c@LoadBalanced\u6ce8\u89e3\u662f\u7528\u4e8e\u5728REST\u6a21\u677f\uff08RestTemplate\uff09\u4e0a [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[],"class_list":["post-8849","post","type-post","status-publish","format-standard","hentry","category-springcloud"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=8849"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8849\/revisions"}],"predecessor-version":[{"id":16672,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8849\/revisions\/16672"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8849"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}