Java 带有ExecutorService的Mysql
我想使用Executors加速将可用数据列表导入数据库Java 带有ExecutorService的Mysql,java,mysql,executorservice,executor,Java,Mysql,Executorservice,Executor,我想使用Executors加速将可用数据列表导入数据库 public static void main(String[] args) { methodOpenDatabaseConnection(); ExecutorService newFixedThreadPool = Executors.newScheduledThreadPool(100);
public static void main(String[] args) {
methodOpenDatabaseConnection();
ExecutorService newFixedThreadPool = Executors.newScheduledThreadPool(100);
for (long i = 0; i < 1000; i++) {
newFixedThreadPool.execute(new Runnable() {
@Override
public void run( {
methodSaveDataToDatabaseMysql();
}
});
}
newFixedThreadPool.shutdown();
newFixedThreadPool.shutdown();
newFixedThreadPool.awaitTermination(60, TimeUnit.SECONDS);
if (newFixedThreadPool.isShutdown()) {
methodCloseConnectionDatabase();
}
}
public void methodSaveDataToDatabaseMysql() {
try {
preparedStatement = connection.prepareStatement("INSERT INTO `demo`"
+ " (`name`,`name2`,`name3`) VALUES (?,?,?)");
preparedStatement.setString(1, "name1");
preparedStatement.setString(2, "name2");
preparedStatement.setString(3, "name3");
preparedStatement.executeUpdate();
} catch (SQLException ex) {
Logger.getLogger(WebsiteResourcesImpl1.class.getName()).log(Level.SEVERE, null, ex);
}
}
我认为save语句没有问题,因为它仍然可以成功地保存数据,但在ExecutorService中并不稳定,因为基于此代码preparedStatement=connection.prepareStatement。。。那么preparedStatement不是线程安全的
考虑将其设置为methodSaveDataToDatabaseMysql方法的本地方法我猜在这段代码中methodSaveDataToDatabaseMysqllong1;您没有设置所有的参数,但由于您没有给出此代码,因此无法提供进一步的帮助。我的遗漏,我已经更新了我的问题,希望您能提供帮助基于此代码preparedStatement=connection.preparedStatement然后preparedStatement不是线程安全的。谢谢你们两位对我的问题感兴趣。@ScaryWombat我遵循了您的建议,我成功了,太棒了
java.sql.SQLException: No value specified for parameter 3
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:569)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:537)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:527)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:512)
at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:480)
at com.mysql.cj.jdbc.PreparedStatement.checkAllParametersSet(PreparedStatement.java:2159)