{"id":47045,"date":"2024-12-02T11:30:14","date_gmt":"2024-12-02T03:30:14","guid":{"rendered":"https:\/\/fwq.ai\/blog\/47045\/"},"modified":"2024-12-02T11:30:14","modified_gmt":"2024-12-02T03:30:14","slug":"%e7%94%a8-java-%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e6%9e%84%e5%bb%ba%e5%93%8d%e5%ba%94%e5%bc%8f%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/47045\/","title":{"rendered":"\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f<\/h1>\n<p>\u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u300b<\/span>\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~<\/p>\n<p>Java \u4e2d\uff0cReactiveX \u6846\u67b6\u63d0\u4f9b\u4e86\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u7684\u5de5\u5177\u3002\u5b83\u5305\u542b Observables\uff08\u6570\u636e\u6d41\uff09\u3001\u8ba2\u9605\u8005\uff08\u63a5\u6536\u66f4\u65b0\uff09\u548c\u8fd0\u7b97\u7b26\uff08\u8f6c\u6362\u3001\u8fc7\u6ee4\u6570\u636e\u6d41\uff09\u3002\u8fd0\u7b97\u7b26\u5305\u62ec\uff1amap\uff08\u8f6c\u6362\u9879\u76ee\uff09\u3001filter\uff08\u8fc7\u6ee4\u9879\u76ee\uff09\u3001combineLatest\uff08\u7ec4\u5408\u6700\u65b0\u9879\u76ee\uff09\u3002\u793a\u4f8b\uff1a\u4f7f\u7528 PublishSubject \u89c2\u5bdf\u6587\u672c\u8f93\u5165\uff0cmap \u5c06\u6587\u672c\u8f6c\u6362\u4e3a\u5927\u5199\uff0c\u5e76\u8ba2\u9605 Observable \u4ee5\u66f4\u65b0 UI\uff0c\u6a21\u62df\u7528\u6237\u8f93\u5165\u4ee5\u89e6\u53d1\u6587\u672c\u66f4\u65b0\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729940802671ccd42aa36e.jpg\" class=\"aligncenter\" title=\"\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u63d2\u56fe\" alt=\"\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u63d2\u56fe\" \/><\/p>\n<h2>\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f<\/h2>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>\u54cd\u5e94\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u8f6f\u4ef6\u5f00\u53d1\u8303\u5f0f\uff0c\u5b83\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u5bf9\u5916\u90e8\u4e8b\u4ef6\u4f5c\u51fa\u5feb\u901f\u54cd\u5e94\uff0c\u4f8b\u5982\u7528\u6237\u8f93\u5165\u6216\u7f51\u7edc\u8bf7\u6c42\u3002Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u7684\u91cd\u8981\u5de5\u5177\uff0c\u672c\u6587\u5c06\u6307\u5bfc\u4f60\u4e00\u6b65\u4e00\u6b65\u8fdb\u884c\u3002<\/p>\n<p><strong>ReactiveX \u6846\u67b6<\/strong><\/p>\n<p>Java \u4e2d\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u54cd\u5e94\u5f0f\u7f16\u7a0b\u6846\u67b6\u662f ReactiveX\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7ec4 Observables\u3001\u8ba2\u9605\u8005\u548c\u8fd0\u7b97\u7b26\uff0c\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u4f7f\u5f97\u521b\u5efa\u54cd\u5e94\u5f0f\u6570\u636e\u6d41\u53d8\u5f97\u7b80\u5355\u3002<\/p>\n<p><strong>Observables<\/strong><\/p>\n<p>Observables \u662f\u4ee3\u8868\u6570\u636e\u6d41\u7684\u5bf9\u8c61\u3002\u5b83\u4eec\u53ef\u4ee5\u4ece\u5404\u79cd\u6765\u6e90\u521b\u5efa\uff0c\u4f8b\u5982\u4e8b\u4ef6\u6e90\u3001\u8ba1\u65f6\u5668\u548c\u7f51\u7edc\u8bf7\u6c42\u3002Observables \u5b9e\u73b0\u4e86 Observer \u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5141\u8bb8\u8ba2\u9605\u8005\u8ba2\u9605\u6570\u636e\u6d41\u5e76\u63a5\u6536\u66f4\u65b0\u3002<\/p>\n<p><strong>\u8ba2\u9605\u8005<\/strong><\/p>\n<p>\u8ba2\u9605\u8005\u662f\u63a5\u6536\u6765\u81ea Observable \u53d1\u51fa\u7684\u66f4\u65b0\u7684\u5bf9\u8c61\u3002\u5b83\u4eec\u53ef\u4ee5\u901a\u8fc7 Observable \u4e0a\u7684 <code>subscribe()<\/code> \u65b9\u6cd5\u6765\u8ba2\u9605 Observable\u3002\u8ba2\u9605\u8005\u53ef\u4ee5\u5b9a\u4e49\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><code>onNext(T item)<\/code>\uff1a\u6bcf\u5f53 Observable \u53d1\u51fa\u4e00\u4e2a\u65b0\u9879\u76ee\u65f6\u90fd\u4f1a\u8c03\u7528\u3002<\/li>\n<li><code>onError(Throwable error)<\/code>\uff1a\u5f53 Observable \u9047\u5230\u9519\u8bef\u65f6\u8c03\u7528\u3002<\/li>\n<li><code>onComplete()<\/code>\uff1a\u5f53 Observable \u5b8c\u6210\u65f6\u8c03\u7528\u3002<\/li>\n<\/ul>\n<p><strong>\u8fd0\u7b97\u7b26<\/strong><\/p>\n<p>ReactiveX \u63d0\u4f9b\u4e86\u8bb8\u591a\u8fd0\u7b97\u7b26\u6765\u8f6c\u6362\u3001\u8fc7\u6ee4\u548c\u7ec4\u5408 Observables\u3002\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u53ef\u4ee5\u5c06\u6765\u81ea\u4e00\u4e2a\u6216\u591a\u4e2a Observables \u7684\u6570\u636e\u6d41\u8f6c\u6362\u4e3a\u53e6\u4e00\u4e2a\u6570\u636e\u6d41\u3002\u4e00\u4e9b\u5e38\u7528\u7684\u8fd0\u7b97\u7b26\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>map()<\/code>\uff1a\u8f6c\u6362 Observable \u53d1\u51fa\u7684\u6bcf\u4e2a\u9879\u76ee\u3002<\/li>\n<li><code>filter()<\/code>\uff1a\u53ea\u5141\u8bb8\u6ee1\u8db3\u7279\u5b9a\u6761\u4ef6\u7684\u9879\u76ee\u901a\u8fc7\u3002<\/li>\n<li><code>combineLatest()<\/code>\uff1a\u7ec4\u5408\u6765\u81ea\u591a\u4e2a Observables \u7684\u6700\u65b0\u9879\u76ee\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u793a\u4f8b<\/strong><\/p>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u793a\u4f8b\u6765\u6f14\u793a\u5982\u4f55\u4f7f\u7528 ReactiveX \u521b\u5efa\u4e00\u4e2a\u54cd\u5e94\u5f0f\u7528\u6237\u754c\u9762\u3002\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5305\u542b\u7528\u6237\u6587\u672c\u8f93\u5165\u7684\u6587\u672c\u6846\u3002\u6bcf\u6b21\u7528\u6237\u66f4\u6539\u6587\u672c\u65f6\uff0c\u6211\u4eec\u90fd\u5e0c\u671b\u5c06\u4fee\u6539\u540e\u7684\u6587\u672c\u663e\u793a\u5728\u6807\u7b7e\u4e2d\u3002<\/p>\n<p><strong>Java \u4ee3\u7801\uff1a<\/strong><\/p>\n<pre>import io.reactivex.rxjava3.core.Observable;\nimport io.reactivex.rxjava3.subjects.PublishSubject;\n\npublic class ReactiveUIExtended {\n\n    public static void main(String[] args) {\n        \/\/ \u521b\u5efa\u4e00\u4e2a PublishSubject \u6765\u89c2\u5bdf\u6587\u672c\u8f93\u5165\n        PublishSubject&lt;String&gt; textField = PublishSubject.create();\n\n        \/\/ \u521b\u5efa\u4e00\u4e2a Observable \u6765\u5904\u7406\u6587\u672c\u8f93\u5165\u5e76\u66f4\u65b0\u6807\u7b7e\n        Observable&lt;String&gt; updatedText = textField\n            .map(String::toUpperCase)\n            .doOnNext(text -&gt; System.out.println(\"Updated Label: \" + text));\n\n        \/\/ \u8ba2\u9605 updatedText Observable \u6765\u66f4\u65b0 UI\n        updatedText.subscribe(new Observer&lt;String&gt;() {\n            @Override\n            public void onNext(String text) {\n                \/\/ \u66f4\u65b0\u6807\u7b7e\u4e2d\u7684\u6587\u672c\n            }\n\n            @Override\n            public void onError(Throwable error) {\n            }\n\n            @Override\n            public void onComplete() {\n            }\n        });\n\n        \/\/ \u6a21\u62df\u7528\u6237\u8f93\u5165\n        textField.onNext(\"Hello\");\n        textField.onNext(\"World\");\n    }\n}<\/pre>\n<p><strong>\u8bf4\u660e\uff1a<\/strong><\/p>\n<ul>\n<li>\u6211\u4eec\u4f7f\u7528 <code>PublishSubject<\/code> \u521b\u5efa\u4e00\u4e2a Observable \u6765\u89c2\u5bdf\u6587\u672c\u8f93\u5165\u3002<\/li>\n<li>\u6211\u4eec\u4f7f\u7528 <code>map()<\/code> \u8fd0\u7b97\u7b26\u5c06\u6587\u672c\u8f6c\u6362\u4e3a\u5927\u5199\u3002<\/li>\n<li>\u6211\u4eec\u4f7f\u7528 <code>doOnNext()<\/code> \u8fd0\u7b97\u7b26\u6253\u5370\u6bcf\u6b21\u66f4\u65b0\u7684\u6587\u672c\u503c\u3002<\/li>\n<li>\u6211\u4eec\u8ba2\u9605 <code>updatedText<\/code> Observable \u4ee5\u66f4\u65b0\u7528\u6237\u754c\u9762\u3002<\/li>\n<li>\u7136\u540e\uff0c\u6211\u4eec\u6a21\u62df\u7528\u6237\u8f93\u5165\uff0c\u5b83\u4f1a\u89e6\u53d1\u6587\u672c\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8ejava,\u54cd\u5e94\u5f0f\u7f16\u7a0b\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f \u6700\u8fd1\u53d1\u73b0\u4e0d\u5c11\u5c0f\u4f19\u4f34\u90fd\u5bf9\u6587\u7ae0\u5f88\u611f\u5174\u8da3\uff0c\u6240\u4ee5\u4eca\u5929\u7ee7\u7eed\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u6587\u7ae0\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u672c\u6587\u300a\u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u300b\u4e3b\u8981\u5185\u5bb9\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u80fd\u5e2e\u5230\u4f60\uff01\u5f53\u7136\u5982\u679c\u9605\u8bfb\u672c\u6587\u65f6\u5b58\u5728\u4e0d\u540c\u60f3\u6cd5\uff0c\u53ef\u4ee5\u5728\u8bc4\u8bba\u4e2d\u8868\u8fbe\uff0c\u4f46\u662f\u8bf7\u52ff\u4f7f\u7528\u8fc7\u6fc0\u7684\u63aa\u8f9e~ Java \u4e2d\uff0cReactiveX \u6846\u67b6\u63d0\u4f9b\u4e86\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u7684\u5de5\u5177\u3002\u5b83\u5305\u542b Observables\uff08\u6570\u636e\u6d41\uff09\u3001\u8ba2\u9605\u8005\uff08\u63a5\u6536\u66f4\u65b0\uff09\u548c\u8fd0\u7b97\u7b26\uff08\u8f6c\u6362\u3001\u8fc7\u6ee4\u6570\u636e\u6d41\uff09\u3002\u8fd0\u7b97\u7b26\u5305\u62ec\uff1amap\uff08\u8f6c\u6362\u9879\u76ee\uff09\u3001filter\uff08\u8fc7\u6ee4\u9879\u76ee\uff09\u3001combineLatest\uff08\u7ec4\u5408\u6700\u65b0\u9879\u76ee\uff09\u3002\u793a\u4f8b\uff1a\u4f7f\u7528 PublishSubject \u89c2\u5bdf\u6587\u672c\u8f93\u5165\uff0cmap \u5c06\u6587\u672c\u8f6c\u6362\u4e3a\u5927\u5199\uff0c\u5e76\u8ba2\u9605 Observable \u4ee5\u66f4\u65b0 UI\uff0c\u6a21\u62df\u7528\u6237\u8f93\u5165\u4ee5\u89e6\u53d1\u6587\u672c\u66f4\u65b0\u3002 \u7528 Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f \u5f15\u8a00 \u54cd\u5e94\u5f0f\u7f16\u7a0b\u662f\u4e00\u79cd\u8f6f\u4ef6\u5f00\u53d1\u8303\u5f0f\uff0c\u5b83\u5141\u8bb8\u5e94\u7528\u7a0b\u5e8f\u5bf9\u5916\u90e8\u4e8b\u4ef6\u4f5c\u51fa\u5feb\u901f\u54cd\u5e94\uff0c\u4f8b\u5982\u7528\u6237\u8f93\u5165\u6216\u7f51\u7edc\u8bf7\u6c42\u3002Java \u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u6784\u5efa\u54cd\u5e94\u5f0f\u5e94\u7528\u7a0b\u5e8f\u7684\u91cd\u8981\u5de5\u5177\uff0c\u672c\u6587\u5c06\u6307\u5bfc\u4f60\u4e00\u6b65\u4e00\u6b65\u8fdb\u884c\u3002 ReactiveX \u6846\u67b6 Java \u4e2d\u4f7f\u7528\u6700\u5e7f\u6cdb\u7684\u54cd\u5e94\u5f0f\u7f16\u7a0b\u6846\u67b6\u662f ReactiveX\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7ec4 Observables\u3001\u8ba2\u9605\u8005\u548c\u8fd0\u7b97\u7b26\uff0c\u8fd9\u4e9b\u8fd0\u7b97\u7b26\u4f7f\u5f97\u521b\u5efa\u54cd\u5e94\u5f0f\u6570\u636e\u6d41\u53d8\u5f97\u7b80\u5355\u3002 Observables Observables 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