批处理数据库（利用batch插入2w条数据）

public class Demo02Batch {
    /*
     * 批处理
     */
    public static void main(String[] args) {
        Connection conn=null;
        Statement stmt=null;
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn=DriverManager.getConnection("jdbc:mysql:///little", "root", "root");

            conn.setAutoCommit(false);//设置自动提交关闭
            stmt=conn.createStatement();
            for(int i=0;i<20000;i++) {
                stmt.addBatch("insert into usr(username,password,regTime) values ('little"+i+"',111,now())");
            }
            stmt.executeBatch();
            conn.commit();
        } catch (SQLException e) {
            e.printStackTrace();
        }catch (ClassNotFoundException e) {
            e.printStackTrace();
        }finally {
            try {
                if(stmt!=null) stmt.close();
                if(conn!=null) conn.close();
            } catch (SQLException e2) {
                e2.printStackTrace();
            }
        }
    }

}