Flink 自定義MySQL sink簡單例子

package com.yqg.bigdata.dm.collection.repay.details;


import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.sink.RichSinkFunction;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;

/**
 * create by liuzhiwei on 2020/3/24
 */
public class MySQLSink extends RichSinkFunction<Tuple2<Integer, Integer>> {
    private transient Connection connection = null;

    @Override
    public void invoke(Tuple2<Integer, Integer> value, Context context) throws Exception {
        PreparedStatement ps = connection.prepareStatement("insert into product_count  values(?,?)");
        ps.setString(1, value.f0.toString());
        ps.setString(2, value.f1.toString());
        ps.execute();
        //數據量大的話請用批量處理方式
    }

    @Override
    public void open(Configuration parameters) throws Exception {
        super.open(parameters);
        String url = "jdbc:mysql://localhost:3306/test?characterEncoding=UTF-8";
        String username = "root";
        String password = "123456";
        try {
            connection = DriverManager.getConnection(url, username, password);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void close() throws Exception {
        super.close();
        if (connection != null) {
            connection.close();
        }
    }
}