即使auto commit为false,从连接中创建新语句是否会提交所有内容?

import java.sql.*;

class App {
    public static void main(String[] args) {
        HelloJdbc hj = new HelloJdbc();
        hj.insertPerson();
        hj.printPersons();
        hj.close();
    }
}

class HelloJdbc {

    String url = "jdbc:h2:~/persons";
    String username = "username";
    String password = "password";

    // Active connection
    Connection con;

    public HelloJdbc() {
        try {
            Connection con = DriverManager.getConnection(url, username, password); Statement st = con.createStatement();
            // Making sure I have the same data every time
            st.executeUpdate("DELETE FROM person");
            st.executeUpdate("INSERT INTO person VALUES (1, 'Alice');");
            this.con = con;
        } catch (SQLException e) {}
    }

    void insertPerson() {
        try {
            con.setAutoCommit(false);
            con.createStatement().executeUpdate("INSERT INTO person VALUES(2, 'Bob');");
        } catch (SQLException e) {}
    }

    void printPersons() {
        try (Connection con = DriverManager.getConnection(url, username, password);) {
            ResultSet rs = con.createStatement().executeQuery("SELECT * FROM person;");
            while (rs.next()) {
                System.out.println(rs.getObject(1) + " " + rs.getObject(2));
            }
        } catch (SQLException e) {}
    }

    void close() {
        try {
            con.close();
        } catch (Exception e) {}
    }
}

运行此代码时,输出为:

1 Alice

我明白,自从年 insertPerson 我有 con.setAutoCommit(false);

但是,当我改变 printPerson

void printPersons() {
    try {
        ResultSet rs = con.createStatement().executeQuery("SELECT * FROM person;");
        while (rs.next()) {
            System.out.println(rs.getObject(1) + " " + rs.getObject(2));
        }
    } catch (SQLException e) {}
}

输出更改为:

1 Alice
2 Bob

我很困惑,从一个连接创建一个新语句是否会提交先前语句的所有内容?行为改变的原因是什么?

编译运行方式 javac App.java; java -cp ".:h2.jar" App; h2.jar 在同一文件夹中 App.java .