SparkSQL 之开发环境造数据

import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;
import java.util.UUID;

/**
 * 模拟数据文件
 */
public class MockData {
    public static void main(String[] args) {
        generateAccessLog();
    }

    /**
     * 产生用户点击日志信息
     */
    public static void generateAccessLog() {
        String file = "D:/access.log";
        BufferedWriter writer = null;

        SimpleDateFormat format = new SimpleDateFormat("yyy-MM-dd HH:mm:ss");
        try {
            //装饰设计模式
            writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file, false)));

            Date date = new Date();
            Random random = new Random();
            for (int i=0 ; i<100 ; i++){
                int userId = random.nextInt(100);
                int cityId = random.nextInt(10);
                String sessionId = UUID.randomUUID().toString();
                writer.write(sessionId+"\t"+userId+"\t"+cityId+"\t"+format.format(date)+"\n");

            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (null != writer) {
                try {
                    writer.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}