MySql 快速插入千萬級(jí)大數(shù)據(jù)的方法示例

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import preprocess.ImportDataBase;
 
public class MuiltThreadImportDB {
 
 /**
  * Java多線程讀大文件并入庫
  * 
  * @param args
  */
 private static int m_record = 99999;
 private static BufferedReader br = null;
 private ArrayListString> list;
 private static int m_thread = 0;
 static {
 try {
  br = new BufferedReader(
  new FileReader(
  "E:/tianci/IJCAI15 Data/data_format1/user_log_format1.csv"),8192);
 
 } catch (FileNotFoundException e) {
  e.printStackTrace();
 }
 try {
  br.readLine(); // 去掉CSV Header
 } catch (IOException e) {
  e.printStackTrace();
 }
 }
 
 public void start() {
 String line;
 int count = 0;
 list = new ArrayListString>(m_record + 1);
 synchronized (br) {
  try {
 while ((line = br.readLine()) != null) {
  if (count  m_record) {
 list.add(line);
 count++;
  } else {
 list.add(line);
 count = 0;
 Thread t1 = new Thread(new MultiThread(list),Integer.toString(m_thread++));
 t1.start();
 list = new ArrayListString>(m_record + 1);
  }
 }
 
 if (list != null) {
  Thread t1 = new Thread(new MultiThread(list),Integer.toString(m_thread++));
  t1.start();
 }
  } catch (IOException e) {
 e.printStackTrace();
  }
 }
 }
 
 public static void main(String[] args) {
 new MuiltThreadImportDB().start();
 } 
}

class MultiThread implements Runnable {
 private ArrayListString> list;
 
 public MultiThread(ArrayListString> list) {
 this.list = list;
 }
 
 public void run() {
 try {
  ImportDataBase insert = new ImportDataBase(list);
  insert.start();
 } catch (FileNotFoundException e) {
  e.printStackTrace();
 }
 display(this.list);
 }
 
 public void display(ListString> list) {
 // for (String str : list) {
 // System.out.println(str);
 // }
 System.out.print(Thread.currentThread().getName() + " :");
 System.out.println(list.size());
 }
 
}

public int insertUserBehaviour(ArrayListString> sqls) throws SQLException {
 
 String sql = "insert into user_behaviour_log (user_id,item_id,cat_id,merchant_id,brand_id,time_stamp,action_type)"
 + " values(?,?,?,?,?,?,?)";
 preStmt = conn.prepareStatement(sql);
 for (int i = 0; i  sqls.size(); i++) {
  UserLog log =new UserLog(sqls.get(i));
  preStmt.setString(1, log.getUser_id());
  preStmt.setString(2, log.getItem_id());
  preStmt.setString(3, log.getCat_id());
  preStmt.setString(4, log.getMerchant_id());
  preStmt.setString(5, log.getBrand_id());
  preStmt.setString(6, log.getTimeStamp());
  preStmt.setString(7, log.getActionType());
  preStmt.addBatch();
  if ((i + 1) % 10000 == 0) {
 preStmt.executeBatch();
 conn.commit();
 preStmt.clearBatch();
  }
 }
 preStmt.executeBatch();
 conn.commit();
 return 1;
 }