（1）通过FlinkSQL将数据写入mysql demo

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：