{"id":11546,"date":"2023-11-28T22:23:19","date_gmt":"2023-11-28T14:23:19","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11546"},"modified":"2023-12-11T11:13:40","modified_gmt":"2023-12-11T03:13:40","slug":"spring-zhongqualifier-zhu-jie-de-zuo-yong-shi","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/spring-zhongqualifier-zhu-jie-de-zuo-yong-shi\/","title":{"rendered":"Spring\u4e2d@Qualifier\u6ce8\u89e3\u7684\u4f5c\u7528\u662f?"},"content":{"rendered":"<p>\u5728Spring\u6846\u67b6\u4e2d\uff0c<code>@Qualifier<\/code>\u6ce8\u89e3\u7528\u4e8e\u89e3\u51b3\u4f9d\u8d56\u6ce8\u5165\u65f6\u7684\u6b67\u4e49\u6027\u95ee\u9898\u3002\u5f53\u5bb9\u5668\u4e2d\u5b58\u5728\u591a\u4e2a\u76f8\u540c\u7c7b\u578b\u7684Bean\u65f6\uff0c\u4f7f\u7528<code>@Qualifier<\/code>\u6ce8\u89e3\u53ef\u4ee5\u6307\u5b9a\u5177\u4f53\u8981\u6ce8\u5165\u7684Bean\u7684\u540d\u79f0\u6216ID\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4\uff0c\u5f53\u4e00\u4e2a\u63a5\u53e3\u6709\u591a\u4e2a\u5b9e\u73b0\u7c7b\u65f6\uff0c\u6216\u8005\u4e00\u4e2a\u7c7b\u6709\u591a\u4e2a\u5b50\u7c7b\u65f6\uff0cSpring\u5bb9\u5668\u5728\u6ce8\u5165\u65f6\u53ef\u80fd\u65e0\u6cd5\u786e\u5b9a\u8981\u6ce8\u5165\u54ea\u4e2a\u5177\u4f53\u7684\u5b9e\u73b0\u7c7b\u6216\u5b50\u7c7b\u3002\u8fd9\u65f6\uff0c\u901a\u8fc7<code>@Qualifier<\/code>\u6ce8\u89e3\u53ef\u4ee5\u6307\u5b9a\u5177\u4f53\u7684Bean\u540d\u79f0\uff0c\u544a\u8bc9\u5bb9\u5668\u5e94\u8be5\u6ce8\u5165\u54ea\u4e00\u4e2a\u3002<\/p>\n<p>\u793a\u4f8b\uff1a<\/p>\n<pre><code class=\"language-java\">public interface Animal {\n    void makeSound();\n}\n\n@Component(&quot;dog&quot;)\npublic class Dog implements Animal {\n    @Override\n    public void makeSound() {\n        System.out.println(&quot;Woof!&quot;);\n    }\n}\n\n@Component(&quot;cat&quot;)\npublic class Cat implements Animal {\n    @Override\n    public void makeSound() {\n        System.out.println(&quot;Meow!&quot;);\n    }\n}\n\n@Service\npublic class AnimalService {\n    private final Animal animal;\n\n    @Autowired\n    public AnimalService(@Qualifier(&quot;dog&quot;) Animal animal) {\n        this.animal = animal;\n    }\n\n    public void performAction() {\n        animal.makeSound();\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c<code>AnimalService<\/code>\u7c7b\u4f9d\u8d56\u4e8e<code>Animal<\/code>\u63a5\u53e3\uff0c\u800c<code>Animal<\/code>\u63a5\u53e3\u6709\u4e24\u4e2a\u5b9e\u73b0\u7c7b\uff1a<code>Dog<\/code>\u548c<code>Cat<\/code>\u3002\u901a\u8fc7\u4f7f\u7528<code>@Qualifier(&quot;dog&quot;)<\/code>\u6ce8\u89e3\uff0c\u6211\u4eec\u544a\u8bc9Spring\u5bb9\u5668\u5e94\u8be5\u6ce8\u5165<code>Dog<\/code>\u7c7b\u578b\u7684Bean\u3002\u5982\u679c\u6ca1\u6709\u4f7f\u7528<code>@Qualifier<\/code>\uff0c\u7531\u4e8e\u5b58\u5728\u591a\u4e2a\u5b9e\u73b0\u7c7b\uff0c\u5bb9\u5668\u5c06\u65e0\u6cd5\u786e\u5b9a\u9009\u62e9\u54ea\u4e00\u4e2a\u8fdb\u884c\u6ce8\u5165\uff0c\u4f1a\u629b\u51fa\u6b67\u4e49\u6027\u9519\u8bef\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<code>@Qualifier<\/code>\u6ce8\u89e3\u901a\u5e38\u4e0e<code>@Autowired<\/code>\u4e00\u8d77\u4f7f\u7528\uff0c\u4ee5\u6307\u5b9a\u5177\u4f53\u7684Bean\u8fdb\u884c\u6ce8\u5165\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728Spring\u6846\u67b6\u4e2d\uff0c@Qualifier\u6ce8\u89e3\u7528\u4e8e\u89e3\u51b3\u4f9d\u8d56\u6ce8\u5165\u65f6\u7684\u6b67\u4e49\u6027\u95ee\u9898\u3002\u5f53\u5bb9\u5668\u4e2d\u5b58\u5728\u591a\u4e2a\u76f8\u540c\u7c7b\u578b\u7684Bea [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[121],"tags":[],"class_list":["post-11546","post","type-post","status-publish","format-standard","hentry","category-spring"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11546","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=11546"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11546\/revisions"}],"predecessor-version":[{"id":17068,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11546\/revisions\/17068"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11546"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}