{"id":667,"date":"2025-02-20T14:15:43","date_gmt":"2025-02-20T06:15:43","guid":{"rendered":"http:\/\/xinsk.cn\/?p=667"},"modified":"2025-03-03T14:08:54","modified_gmt":"2025-03-03T06:08:54","slug":"java%e4%bd%bf%e7%94%a8flink-%e4%bb%8ekafka%e4%b8%ad%e8%8e%b7%e5%8f%96%e5%b9%b6%e5%a4%84%e7%90%86%e6%95%b0%e6%8d%ae%ef%bc%8c%e5%86%8d%e4%bc%a0%e5%9b%9ekafka%ef%bc%88%e6%a1%88%e4%be%8b%ef%bc%89","status":"publish","type":"post","link":"http:\/\/www.xinsk.cn\/?p=667","title":{"rendered":"Java\u4f7f\u7528Flink \u4eceKafka\u4e2d\u83b7\u53d6\u5e76\u5904\u7406\u6570\u636e\uff0c\u518d\u4f20\u56deKafka\uff08\u6848\u4f8b\uff09"},"content":{"rendered":"\n

\u524d\u7f6e\u8bf4\u660e\uff1a<\/mark><\/strong>
\uff081\uff09Kafka\u4e2d\u5b58\u50a8\u7684\u6570\u636e\u6837\u5f0f\u4e3aJSONArray\u683c\u5f0f\uff0c\u5e76\u4e0d\u662f\u5e38\u89c4\u7684JSONObject\u683c\u5f0f\u3002<\/p>\n\n\n\n

{\n   \"title\":\"LineNameData\",\n   \"data\":[\n      {\n         \"LINE_NAME\":\"A1\",\n         \"TYPE\":\"R\"\n      },\n      {\n         \"LINE_NAME\":\"A2\",\n         \"TYPE\":\"SR\"\n      },\n      {\n         \"LINE_NAME\":\"A3\",\n         \"TYPE\":\"SSR\"\n      },\n   ]\n}<\/code><\/pre>\n\n\n\n
\uff082\uff09\u4f7f\u7528\u7684Java\u7248\u672c\u4e3a1.8\uff0cFlink\u7248\u672c\u4e3a1.17.0\uff0cKafka\u7248\u672c\u4e3a3.6.2\u3002<\/p>\n\n\n\n
1\u3001pom\u914d\u7f6e<\/mark><\/strong><\/p>\n\n\n\n
<properties>\n    <project.build.sourceEncoding>UTF-8<\/project.build.sourceEncoding>\n    <maven.compiler.source>1.8<\/maven.compiler.source>\n    <maven.compiler.target>1.8<\/maven.compiler.target>\n    <flink.version>1.17.0<\/flink.version>\n  <\/properties>\n\n  <dependencies>\n\n    <dependency>\n      <groupId>org.apache.flink<\/groupId>\n      <artifactId>flink-java<\/artifactId>\n      <version>${flink.version}<\/version>\n    <\/dependency>\n\n    <dependency>\n      <groupId>org.apache.flink<\/groupId>\n      <artifactId>flink-streaming-java<\/artifactId>\n      <version>${flink.version}<\/version>\n    <\/dependency>\n\n    <dependency>\n        <groupId>org.apache.flink<\/groupId>\n        <artifactId>flink-clients<\/artifactId>\n        <version>${flink.version}<\/version>\n    <\/dependency>\n\n    <dependency>\n      <groupId>org.apache.flink<\/groupId>\n      <artifactId>flink-connector-kafka<\/artifactId>\n      <version>${flink.version}<\/version>\n    <\/dependency>\n\n    <dependency>\n      <groupId>com.alibaba<\/groupId>\n      <artifactId>fastjson<\/artifactId>\n      <version>1.2.83<\/version>\n    <\/dependency>\n\n    <dependency>\n      <groupId>org.apache.kafka<\/groupId>\n      <artifactId>kafka-clients<\/artifactId>\n      <version>3.7.1<\/version>\n    <\/dependency>\n\n    <!-- \u5982\u679c\u6709\u8bf7\u6c42MySQL\u7684\u9700\u6c42\u53ef\u4ee5\u52a0\u4e0a -->\n    <dependency>\n      <groupId>com.mysql<\/groupId>\n      <artifactId>mysql-connector-j<\/artifactId>\n      <version>8.2.0<\/version>\n    <\/dependency>\n\n    <dependency>\n      <groupId>junit<\/groupId>\n      <artifactId>junit<\/artifactId>\n      <version>4.11<\/version>\n      <scope>test<\/scope>\n    <\/dependency>\n\n  <\/dependencies>\n\n \n<build>\n    <plugins>\n        <plugin>\n            <groupId>org.apache.maven.plugins<\/groupId>\n            <artifactId>maven-assembly-plugin<\/artifactId>\n            <version>3.3.0<\/version>\n            <configuration>\n                <archive>\n                    <manifest>\n                        <mainClass>com.compal.App<\/mainClass>\n                    <\/manifest>\n                <\/archive>\n                <descriptorRefs>\n                    <descriptorRef>jar-with-dependencies<\/descriptorRef>\n                <\/descriptorRefs>\n            <\/configuration>\n            <executions>\n                <execution>\n                    <id>make-assembly<\/id>\n                    <phase>package<\/phase>\n                    <goals>\n                        <goal>single<\/goal>\n                    <\/goals>\n                <\/execution>\n            <\/executions>\n        <\/plugin>\n    <\/plugins>\n<\/build><\/code><\/pre>\n\n\n\n
2\u3001APP.java<\/mark><\/strong><\/p>\n\n\n\n
package com.compal;\n\npublic class App {\n    public static void main(String[] args) throws Exception {\n        System.out.println(\"is running\");\n        KafkaGetUtil.getData(); \/\/ Kafka\u5206\u88c5\u5230\u8fd9\u4e2a\u7c7b\u91cc\u9762\u4e86\uff0c\u6240\u4ee5\u8fd9\u8fb9\u5c31\u76f4\u63a5\u5f15\u7528\u4e86\n    }\n}\n<\/code><\/pre>\n\n\n\n
3\u3001KafkaGetUtil.java<\/mark><\/strong><\/p>\n\n\n\n
package com.compal;\n\nimport org.apache.flink.connector.kafka.source.KafkaSource;\nimport org.apache.flink.connector.kafka.source.enumerator.initializer.OffsetsInitializer;\nimport org.apache.flink.streaming.api.datastream.DataStreamSource;\nimport org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;\nimport org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;\n\nimport org.apache.flink.api.common.eventtime.WatermarkStrategy;\nimport org.apache.flink.api.common.serialization.SimpleStringSchema;\n\npublic class KafkaGetUtil {\n    private final static String kafkaServer = \"yourServer\";\n    private final static String getTopic = \"yourTopic\";\n    private final static String groupId = \"yourConsumer\";\n\n    public static void getData() throws Exception {\n        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();\n\n        \/\/ \u8bbe\u7f6eFlink\u4f5c\u4e1a\u7684\u5e76\u884c\u5ea6\n        env.setParallelism(1);\n\n        \/\/ kafka source\n        KafkaSource<String> source = KafkaSource.<String>builder()\n                .setBootstrapServers(kafkaServer)\n                .setTopics(getTopic)\n                .setGroupId(groupId)\n                .setValueOnlyDeserializer(new SimpleStringSchema())\n                .setStartingOffsets(OffsetsInitializer.earliest())\n                .build();\n\n        DataStreamSource<String> fromSource = env.fromSource(source, WatermarkStrategy.noWatermarks(), \"Kafka Source\");\n\n        \/\/ \u8fd9\u91cc\u7684formSource\u62ff\u5230\u7684\u662fTopic\u4e0b\u6240\u6709\u6d88\u606f\u7684Value\uff0c\u7531\u4e8e\u6211\u4eec\u8bbe\u7f6e\u6d88\u606f\u5185\u5bb9\u65f6\u5c06title\u8bbe\u7f6e\u4e3a\u4e86LineNameData\uff0c\u6240\u4ee5\u6b64\u5904\u4ee3\u7801\u7684\u4f5c\u7528\u5c31\u662f\u8fc7\u6ee4\u51fatitle\u4e3aLineNameData\u7684\u6570\u636e\n        SingleOutputStreamOperator<String> filter = fromSource\n                .filter(value -> value.indexOf(\"LineNameData\") != -1);\n\n        \/\/ \u5c06\u83b7\u5f97\u7684\u6570\u636e\u4f20\u9012\u7ed9DataProcess\u7c7b\u6765\u5904\u7406\n        filter.addSink(new DataProcess());\n\n        env.execute();\n    }\n}<\/code><\/pre>\n\n\n\n
4\u3001ChangeLine.java<\/mark><\/strong>
\u521b\u5efa\u4e00\u4e2a\u7c7b\u7528\u4e8e\u5b58\u50a8\u6700\u7ec8\u60f3\u8981\u7684\u7ed3\u679c\uff0c\u65b9\u4fbf\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u7684\u8d4b\u503c\uff0c\u5bf9\u6bd4\u7b49\u64cd\u4f5c\u3002<\/p>\n\n\n\n
5\u3001DataProcess.java<\/mark><\/strong>
Stream\u7684\u4f7f\u7528\u65b9\u6cd5\u4ee5\u53ca\u652f\u6301\u7684\u51fd\u6570\u53ef\u4ee5\u67e5\u770b\u8fd9\u4e00\u7bc7\u6587\u7ae0\uff1aJava Stream API\u4e2d\u5e38\u7528\u7684\u51fd\u6570\u53ca\u5176\u793a\u4f8b – YW<\/a><\/p>\n\n\n\n
package com.compal;\n\nimport java.util.Comparator;\nimport java.util.List;\nimport java.util.Properties;\nimport java.util.stream.Collectors;\n\nimport org.apache.flink.streaming.api.functions.sink.RichSinkFunction;\nimport org.apache.kafka.clients.producer.KafkaProducer;\nimport org.apache.kafka.clients.producer.ProducerRecord;\nimport org.apache.kafka.clients.producer.RecordMetadata;\nimport org.apache.kafka.common.serialization.StringSerializer;\n\nimport com.alibaba.fastjson.JSONArray;\nimport com.alibaba.fastjson.JSONObject;\n\n\/*\n * \u5bf9\u6355\u83b7\u7684\u6570\u636e\u8fdb\u884c\u5904\u7406\uff0c\u7c7b\u9700\u8981\u7ee7\u627fRichSinkFunction\u3002\n*\/\n\npublic class DataProcess extends RichSinkFunction<String> {\n\n    \/\/ \u91cd\u5199\u6b64\u7c7b\u53ef\u4ee5\u83b7\u53d6\u5230\u4f20\u9012\u8fc7\u6765\u7684\u6570\u636e\uff0c\u4e5f\u5c31\u662fvalue\n    @Override\n    public void invoke(String value) throws Exception {\n        JSONObject KafkaData = JSONObject.parseObject(value);\n        JSONArray Data= (JSONArray) KafkaData.get(\"Data\"); \/\/ \u83b7\u53d6\u5bf9\u5e94Key\u7684Value\n\n\n        \/\/ \u5c06\u83b7\u53d6\u5230\u7684\u6570\u636e\u8f6c\u5316\u4e3aChangeLine\u5bf9\u8c61\uff0c\u65b9\u4fbf\u540e\u7eed\u7684\u6570\u636e\u5904\u7406\n        List<ChangeLine> LineDataList = LineData.toJavaList(ChangeLine.class);\n\n        \/\/ \u8fd9\u91cc\u4f7f\u7528\u7684\u662fjava\u7684stream\u6d41\u5904\u7406\uff0c\u53ef\u4ee5\u5b9e\u73b0\u57fa\u7840\u7684\u805a\u5408\uff0c\u8fc7\u6ee4\uff0c\u6392\u5e8f\u7b49\u64cd\u4f5c\n        List<ChangeLine> NowLineList = LineDataList.stream().filter(obj -> {\n            \/\/ \u4f60\u7684\u8fc7\u6ee4\u903b\u8f91\n        }).collect(Collectors.toList());\n\n        \/\/ \u7528\u4e8e\u5b58\u653e\u5904\u7406\u5b8c\u7684\u6570\u636e\uff08\u597d\u4f20\u7ed9Kafka\uff09\n        JSONArray LineJsonArray = new JSONArray();\n        for (ChangeLine line : NowLineList) {\n            \/\/ \u904d\u5386\u6570\u636e\uff0c\u505a\u5177\u4f53\u7684\u6570\u636e\u5904\u7406......\n\n            \/\/ \u8f6c\u5316\u4e3aJSONObject\u683c\u5f0f,\u65b9\u4fbf\u4f20\u56deKafka\n            JSONObject LineJsonObject = new JSONObject();\n            LineJsonObject.put(\"LINE_NAME\", line.getLINE_NAME());\n            LineJsonArray.add(LineJsonObject);\n        }\n        ;\n\n        \/\/ \u6784\u9020\u6700\u7ec8\u7684JSONObject\uff0c\u5e76\u53d1\u9001\u5230Kafka\n        JSONObject finalJsonObject = new JSONObject();\n        finalJsonObject.put(\"LineData\", LineJsonArray);\n        finalJsonObject.put(\"title\", \"ChangeLine\");\n        String ChangeLineJsonString = finalJsonObject.toString();\n\n        Properties props = new Properties();\n        props.put(\"bootstrap.servers\",\"yourKafkaServer\");\n        props.put(\"key.serializer\", StringSerializer.class.getName());\n        props.put(\"value.serializer\", StringSerializer.class.getName());\n\n        \/\/ \u521b\u5efaKafka\u751f\u4ea7\u8005\n        KafkaProducer<String, String> producer = new KafkaProducer<>(props);\n\n        \/\/ \u53d1\u9001\u6d88\u606f\u5230Kafka\n        ProducerRecord<String, String> record = new ProducerRecord<>(\"yourTopicName\", \"ChangeLine\",ChangeLineJsonString);\n        producer.send(record, (RecordMetadata metadata, Exception e) -> {\n            if (e != null) {\n                System.out.println(\"\u53d1\u9001\u6d88\u606f\u5931\u8d25: \" + e.getMessage());\n            } else {\n                System.out.println(\"\u6d88\u606f\u53d1\u9001\u6210\u529f: \" + metadata.toString());\n            }\n        });\n\n        \/\/ \u5173\u95ed\u751f\u4ea7\u8005\n        producer.close();\n\n    }\n\n}<\/code><\/pre>\n\n\n\n
\u5b98\u65b9\u6587\u6863\u53c2\u8003\uff1aKafka | Apache Flink<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u524d\u7f6e\u8bf4\u660e\uff1a\uff081\uff09Kafka\u4e2d\u5b58\u50a8\u7684\u6570\u636e\u6837\u5f0f\u4e3aJSONArray\u683c\u5f0f\uff0c\u5e76\u4e0d\u662f\u5e38\u89c4\u7684JSONObject\u683c\u5f0f\u3002 \uff08 […]<\/p>\n","protected":false},"author":1,"featured_media":697,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-667","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-flink"],"yoast_head":"\nJava\u4f7f\u7528Flink \u4eceKafka\u4e2d\u83b7\u53d6\u5e76\u5904\u7406\u6570\u636e\uff0c\u518d\u4f20\u56deKafka\uff08\u6848\u4f8b\uff09 - YW<\/title>\n<meta name=\"description\" content=\"YW - \u6848\u4f8b\uff1aFlink\u83b7\u53d6Kafka\u6570\u636e\uff0c\u5e76\u4f20\u8f93\u5904\u7406\u8fc7\u540e\u7684\u6570\u636e\u5230Kafka\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.xinsk.cn\/?p=667\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Java\u4f7f\u7528Flink \u4eceKafka\u4e2d\u83b7\u53d6\u5e76\u5904\u7406\u6570\u636e\uff0c\u518d\u4f20\u56deKafka\uff08\u6848\u4f8b\uff09 - 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