{"id":203050,"date":"2025-05-22T12:27:50","date_gmt":"2025-05-22T04:27:50","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203050\/"},"modified":"2025-05-22T12:27:50","modified_gmt":"2025-05-22T04:27:50","slug":"java%e5%87%bd%e6%95%b0%e5%9c%a8%e7%89%a9%e8%81%94%e7%bd%91%e4%b8%ad%e7%9a%84%e5%ba%94%e7%94%a8%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203050\/","title":{"rendered":"Java\u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u7684\u5e94\u7528\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u7684\u5e94\u7528\u6709\u54ea\u4e9b\uff1f<\/h1>\n<p>\u6587\u7ae0\u5c0f\u767d\u4e00\u679a\uff0c\u6b63\u5728\u4e0d\u65ad\u5b66\u4e60\u79ef\u7d2f\u77e5\u8bc6\uff0c\u73b0\u5c06\u5b66\u4e60\u5230\u7684\u77e5\u8bc6\u8bb0\u5f55\u4e00\u4e0b\uff0c\u4e5f\u662f\u5c06\u6211\u7684\u6240\u5f97\u5206\u4eab\u7ed9\u5927\u5bb6\uff01\u800c\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0\u300aJava\u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u7684\u5e94\u7528\u6709\u54ea\u4e9b\uff1f\u300b\u5e26\u5927\u5bb6\u6765\u4e86\u89e3\u4e00\u4e0b##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u4ece\u800c\u5f25\u8865\u81ea\u5df1\u7684\u4e0d\u8db3\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><\/p>\n<p>Java \u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\uff0c\u53ef\u7528\u4e8e\u5b9e\u65f6\u6570\u636e\u5904\u7406\uff08\u4f8b\u5982\u5206\u6790\u6e29\u5ea6\u4f20\u611f\u5668\u6570\u636e\uff09\u3001\u8bbe\u5907\u7ba1\u7406\uff08\u4f8b\u5982\u6ce8\u518c\u548c\u66f4\u65b0\u8bbe\u5907\uff09\u3001\u6570\u636e\u53ef\u89c6\u5316\uff08\u4f8b\u5982\u521b\u5efa\u4eea\u8868\u677f\uff09\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241027\/1730030093671e2a0d4ec8b.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Java \u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u7684\u5e94\u7528<\/strong><\/p>\n<p>\u968f\u7740\u7269\u8054\u7f51 (IoT) \u7684\u84ec\u52c3\u53d1\u5c55\uff0cJava \u51fd\u6570\u5728\u8be5\u9886\u57df\u53d1\u6325\u7740\u8d8a\u6765\u8d8a\u91cd\u8981\u7684\u4f5c\u7528\u3002Java \u51fd\u6570\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u3001\u53ef\u91cd\u590d\u4f7f\u7528\u7684\u4ee3\u7801\u7247\u6bb5\uff0c\u53ef\u4ee5\u90e8\u7f72\u5728\u5404\u79cd\u5e73\u53f0\u548c\u73af\u5883\u4e2d\uff0c\u4f7f\u5f00\u53d1\u8005\u80fd\u591f\u5feb\u901f\u9ad8\u6548\u5730\u6784\u5efa\u548c\u90e8\u7f72\u7269\u8054\u7f51\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<p><strong>\u5b9e\u65f6\u6570\u636e\u5904\u7406<\/strong><\/p>\n<p>Java \u51fd\u6570\u53ef\u7528\u4e8e\u5904\u7406\u6765\u81ea\u7269\u8054\u7f51\u8bbe\u5907\u7684\u5b9e\u65f6\u6570\u636e\u6d41\u3002\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u8fc7\u6ee4\u3001\u8f6c\u6362\u548c\u805a\u5408\u6570\u636e\uff0c\u63d0\u53d6\u6709\u4ef7\u503c\u7684\u89c1\u89e3\u548c\u6d1e\u5bdf\u529b\u3002\u4f8b\u5982\uff0cJava \u51fd\u6570\u53ef\u4ee5\u5b9e\u65f6\u5206\u6790\u6e29\u5ea6\u4f20\u611f\u5668\u6536\u96c6\u7684\u6570\u636e\uff0c\u5e76\u89e6\u53d1\u8b66\u62a5\u4ee5\u4fbf\u5728\u6e29\u5ea6\u8d85\u51fa\u9884\u8bbe\u9608\u503c\u65f6\u901a\u77e5\u76f8\u5173\u4eba\u5458\u3002<\/p>\n<p><strong>\u4ee3\u7801\u793a\u4f8b\uff1a\u5b9e\u65f6\u6e29\u5ea6\u5206\u6790<\/strong><\/p>\n<pre>import com.google.cloud.functions.HttpFunction;\nimport com.google.cloud.functions.HttpRequest;\nimport com.google.cloud.functions.HttpResponse;\nimport java.io.BufferedWriter;\nimport java.io.IOException;\nimport java.util.logging.Logger;\n\npublic class TemperatureAlert implements HttpFunction {\n  private static final Logger logger = Logger.getLogger(TemperatureAlert.class.getName());\n\n  @Override\n  public void service(HttpRequest request, HttpResponse response)\n      throws IOException {\n    BufferedWriter writer = response.getWriter();\n    \/\/ \u4ece\u8bf7\u6c42\u4e2d\u89e3\u6790\u6e29\u5ea6\u503c\n    String temperature = request.getFirstQueryParameter(\"temperature\").orElse(\"0\");\n    \/\/ \u8bbe\u7f6e\u8b66\u62a5\u9608\u503c\n    int threshold = 30;\n\n    \/\/ \u68c0\u67e5\u6e29\u5ea6\u662f\u5426\u8d85\u8fc7\u9608\u503c\uff0c\u5e76\u89e6\u53d1\u8b66\u62a5\n    if (Integer.parseInt(temperature) &gt; threshold) {\n      logger.info(\"Temperature exceeded threshold: \" + temperature);\n      writer.write(\"ALERT: Temperature exceeded threshold!\");\n    } else {\n      writer.write(\"Temperature is within normal range.\");\n    }\n  }\n}<\/pre>\n<p><strong>\u8bbe\u5907\u7ba1\u7406<\/strong><\/p>\n<p>Java \u51fd\u6570\u53ef\u7528\u4e8e\u7ba1\u7406\u548c\u63a7\u5236\u7269\u8054\u7f51\u8bbe\u5907\u3002\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u6267\u884c\u8bf8\u5982\u8bbe\u5907\u6ce8\u518c\u3001\u66f4\u65b0\u548c\u6ce8\u9500\u7b49\u4efb\u52a1\u3002\u4f8b\u5982\uff0cJava \u51fd\u6570\u53ef\u4ee5\u4e0e\u4e91\u670d\u52a1\u63d0\u4f9b\u5546\u7684 API \u96c6\u6210\uff0c\u4ee5\u81ea\u52a8\u914d\u7f6e\u548c\u66f4\u65b0\u90e8\u7f72\u5728\u73b0\u573a\u7684\u8bbe\u5907\u3002<\/p>\n<p><strong>\u4ee3\u7801\u793a\u4f8b\uff1a\u8bbe\u5907\u6ce8\u518c<\/strong><\/p>\n<pre>import com.google.cloud.iot.v1.DeviceManagerClient;\nimport com.google.cloud.iot.v1.Device;\nimport com.google.cloud.iot.v1.DeviceCredential;\nimport com.google.cloud.iot.v1.DeviceCredential.PublicKeyCredential;\nimport com.google.cloud.iot.v1.DeviceName;\nimport com.google.cloud.iot.v1.Path;\nimport com.google.protobuf.ByteString;\nimport java.io.IOException;\nimport java.nio.file.Files;\nimport java.nio.file.Paths;\n\npublic class DeviceRegistration {\n  public static void registerDevice() throws IOException {\n    \/\/ Set the project and cloud region\n    String projectId = \"YOUR_PROJECT_ID\";\n    String cloudRegion = \"YOUR_CLOUD_REGION\";\n\n    \/\/ Instantiate the client\n    try (DeviceManagerClient client = DeviceManagerClient.create()) {\n\n      \/\/ Set the device name\n      String deviceId = \"YOUR_DEVICE_ID\";\n      DeviceName deviceName = DeviceName.of(projectId, cloudRegion, deviceId);\n\n      \/\/ Read the public key from file\n      byte[] keyBytes = Files.readAllBytes(Paths.get(\"PATH_TO_PUBLIC_KEY\"));\n      ByteString key = ByteString.copyFrom(keyBytes);\n\n      \/\/ Create the public key credential\n      PublicKeyCredential publicKeyCredential =\n          PublicKeyCredential.newBuilder()\n              .setKey(key)\n              .setFormat(\"RSA_X509_PEM\")\n              .build();\n\n      \/\/ Create the device credential\n      DeviceCredential credential =\n          DeviceCredential.newBuilder().setPublicKey(publicKeyCredential).build();\n\n      \/\/ Set the device metadata and credential\n      Device device = Device.newBuilder().setId(deviceId).setCredentials(credential).build();\n\n      \/\/ Create the device on a registry\n      Device registeredDevice = client.createDevice(device, deviceName);\n\n      \/\/ Print the device detail\n      System.out.println(\"Registered device: \" + registeredDevice.getName());\n    }\n  }\n}<\/pre>\n<p><strong>\u6570\u636e\u53ef\u89c6\u5316<\/strong><\/p>\n<p>Java \u51fd\u6570\u53ef\u7528\u4e8e\u4ece\u7269\u8054\u7f51\u8bbe\u5907\u6536\u96c6\u6570\u636e\u5e76\u5c06\u5176\u53ef\u89c6\u5316\u3002\u8fd9\u4e9b\u51fd\u6570\u53ef\u4ee5\u96c6\u6210\u56fe\u8868\u5e93\u548c\u6570\u636e\u5206\u6790\u5de5\u5177\uff0c\u4ee5\u4fbf\u5bf9\u6570\u636e\u8fdb\u884c\u5efa\u6a21\u3001\u8f6c\u6362\u548c\u6e32\u67d3\uff0c\u4ee5\u521b\u5efa\u4eea\u8868\u677f\u548c\u53ef\u89c6\u5316\uff0c\u4f7f\u5229\u76ca\u76f8\u5173\u8005\u80fd\u591f\u8f7b\u677e\u5730\u7406\u89e3\u548c\u5206\u6790\u7269\u8054\u7f51\u8bbe\u5907\u751f\u6210\u7684\u6570\u636e\u3002<\/p>\n<p><strong>\u4ee3\u7801\u793a\u4f8b\uff1a\u4eea\u8868\u677f\u53ef\u89c6\u5316<\/strong><\/p>\n<pre>import com.google.cloud.functions.HttpFunction;\nimport com.google.cloud.functions.HttpRequest;\nimport com.google.cloud.functions.HttpResponse;\nimport com.google.gson.Gson;\nimport java.io.BufferedWriter;\nimport java.io.IOException;\nimport java.util.Map;\n\npublic class DashboardVisualization implements HttpFunction {\n\n  private static final Gson gson = new Gson();\n\n  @Override\n  public void service(HttpRequest request, HttpResponse response)\n      throws IOException {\n    BufferedWriter writer = response.getWriter();\n    \/\/ \u4ece\u8bf7\u6c42\u4e2d\u89e3\u6790\u6570\u636e\n    Map&lt;String, String&gt; data = gson.fromJson(request.getReader(), Map.class);\n\n    \/\/ \u53ef\u89c6\u5316\u6570\u636e\uff0c\u4f8b\u5982\u751f\u6210\u56fe\u8868\u6216\u4eea\u8868\u677f\n    \/\/ ...\u53ef\u89c6\u5316\u903b\u8f91...\n\n    \/\/ \u5c06\u53ef\u89c6\u5316\u7ed3\u679c\u5199\u5165\u54cd\u5e94\n    writer.write(\"VISUALIZATION_RESULT\");\n  }\n}<\/pre>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>Java \u51fd\u6570\u4e3a\u7269\u8054\u7f51\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u6784\u5efa\u548c\u90e8\u7f72\u9ad8\u6548\u3001\u53ef\u6269\u5c55\u548c\u53ef\u7ef4\u62a4\u7684\u89e3\u51b3\u65b9\u6848\u7684\u5f3a\u5927\u5de5\u5177\u3002\u901a\u8fc7\u5229\u7528\u5b9e\u65f6\u6570\u636e\u5904\u7406\u3001\u8bbe\u5907\u7ba1\u7406\u3001\u6570\u636e\u53ef\u89c6\u5316\u7b49\u529f\u80fd\uff0cJava \u51fd\u6570\u4f7f\u7269\u8054\u7f51\u5e94\u7528\u7684\u5f00\u53d1\u53d8\u5f97\u66f4\u52a0\u5bb9\u6613\u548c\u9ad8\u6548\u3002<\/p>\n<p>\u6587\u4e2d\u5173\u4e8ejava,\u7269\u8054\u7f51\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300aJava\u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u7684\u5e94\u7528\u6709\u54ea\u4e9b\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u51fd\u6570\u5728\u7269\u8054\u7f51\u4e2d\u7684\u5e94\u7528\u6709\u54ea&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-203050","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203050","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=203050"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203050\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203050"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203050"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203050"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}