Question

我想使用jdbc在一段时间内添加记录数据库表。

例如，我希望以10秒的间隔添加100000条记录，因此它将插入10000 /秒。

我的MySQL代码如下：

String url1 = "jdbc:mysql://localhost:3306/xyz";
String user = "root";
String password = "root";
conn1 = DriverManager.getConnection(url1, user, password);
if (conn1 != null) {
    System.out.println("Connected to the database xyz");
    for(int i=0;i<=n;i++){ // where n is no. of record that I want to insert
        // Here is my insert logic
    }
}

Answer 1

@ yogesh-jalodara在我的评论中，我的意思是那样的

final long loopDuration = 1;//second
final long totalSize = 100000;
final long timeInterval = 10;
final AtomicLong batchNumber = new AtomicLong((long)Math.ceil((double) timeInterval / loopDuration));
Timer timer = new Timer();
timer.schedule(new TimerTask() {
    @Override
    public void run() {
        //insert logic
        if (batchNumber.decrementAndGet() == 0) {
            timer.cancel();
            timer.purge();
        }

    }
}, 0, loopDuration * 1000);

Answer 2

使用批量查询，您可以有效地减少数据库往返，节省了大量花在网络延迟上的时间，从而提高了Java应用程序的性能。

public class MySQLJdbcExample {

    public static void main(String args[]) throws SQLException {

        String url="jdbc:mysql://localhost:3306/test";
        Connection conn = DriverManager.getConnection(url, "root", "root"); 
        String query = "insert into employee values (?,?,NULL)";
        PreparedStatement pStatement = conn.prepareStatement(query);
        int batchSize = 100;

        long startTime = System.currentTimeMillis();
        for (int count = 0; count < 1000; count++) {
            pStatement.setString(1, Integer.toString(count));
            pStatement.setString(2, "Employee" + count);
            pStatement.addBatch();

            if (count % batchSize == 0) {
                pStatement.executeBatch();
            }
        }

       pStatement.executeBatch() ; //for remaining batch queries if total record is odd no.

     // conn.commit();
        pStatement.close();
        conn.close();
        long endTime = System.currentTimeMillis();
        long elapsedTime = (endTime - startTime)/1000; //in seconds
        System.out.println("Total time required to execute 1000 queries using PreparedStatement with JDBC batch insert is :" + elapsedTime);



    }
}

了解详情：http://javarevisited.blogspot.com/2013/01/jdbc-batch-insert-and-update-example-java-prepared-statement.html#ixzz47Bgqyx64

在Java中添加一些时间间隔的大量数据

2 个答案: