（1）通过FlinkSQL将数据写入mysql demo

1.png

FlinkSQL的出现，极大程度上降低了Flink的编程门槛，更加容易理解和掌握使用。今天将自己的笔记分享出来，希望能帮助在这方面有需要的朋友。
（1）首先引入POM依赖：

    1.13.1
    2.12
    1.7.30



    
        org.apache.flink
        flink-java
        ${flink.version}
    
    
        org.apache.flink
        flink-streaming-java_${scala.binary.version}
        ${flink.version}
    
        org.apache.flink
        flink-clients_${scala.binary.version}
        ${flink.version}
    
    
        org.apache.flink
        flink-table-api-java-bridge_${scala.binary.version}
        ${flink.version}
    

    
    
        org.apache.flink
        flink-connector-jdbc_${scala.binary.version}
        ${flink.version}
        
    
    
        org.apache.flink
        flink-table-planner-blink_${scala.binary.version}
        ${flink.version}
    
    
        org.apache.flink
        flink-streaming-scala_${scala.binary.version}
        ${flink.version}
    
    
        org.apache.flink
        flink-table-common
        ${flink.version}
    
    
        org.apache.flink
        flink-json
        ${flink.version}
    
    
    
        com.fasterxml.jackson.core
        jackson-databind
        2.12.0
    

    
    
        mysql
        mysql-connector-java
        8.0.16
    

    
        com.alibaba
        fastjson
        1.2.66
    

（2）编写代码

public static void main(String[] args) throws Exception {
    final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    EnvironmentSettings settings = EnvironmentSettings.newInstance()
            .inStreamingMode()
            //.useOldPlanner() // flink
            .useBlinkPlanner() // blink
            .build();
    StreamTableEnvironment ste = StreamTableEnvironment.create(env, settings);


    String ddl = "CREATE TABLE flinksinksds(\r\n" +
            "componentname STRING,\r\n" +
            "componentcount INT,\r\n" +
            "componentsum INT\r\n" +
            ") WITH(\r\n" +
            "'connector.type'='jdbc',\r\n" +
            "'connector.driver' =  'com.mysql.cj.jdbc.Driver'," +
            "'connector.url'='jdbc:mysql://localhost:3306/testdb?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Shanghai',\r\n" +
            "'connector.table'='flinksink',\r\n" +
            "'connector.username'='root',\r\n" +
            "'connector.password'='root',\r\n" +
            "'connector.write.flush.max-rows'='1'\r\n" +
            ")";
    System.err.println(ddl);
    ste.executeSql(ddl);

    String insert = "insert into flinksinksds(componentname,componentcount,componentsum)" +
            "values('1024', 1 , 2 )";
    ste.executeSql(insert);
    env.execute();
    System.exit(0);
}

（3）执行结果：

2.png