wqlin

class MyRunner implements Runnable {
    public void run() {
        System.out.println(Thread.currentThread().getName() + ":连接数据库...");
        Connection connection = null;
        try {
            connection = DriverManager.getConnection(RepeatableRead.DB_URL, RepeatableRead.USER, RepeatableRead.PASS);
            connection.setAutoCommit(false);
            //connection.setTransactionIsolation(Connection.TRANSACTION_REPEATABLE_READ);
            connection.setTransactionIsolation(Connection.TRANSACTION_READ_COMMITTED);
            String querySql = "select * from account where id=?";

wqlin

#include <iostream>
#include <unordered_map>
#include <queue>
#include <sstream>

/*
 * 阿里巴巴2017实习生招聘在线编程测验--基础平台研发工程师
 * 思路：使用邻接矩阵表示图， 因为地理位置不超过100，所以可以先建立起一个 100x100 的矩阵
 * 然后读入数据，依次建立矩阵（使用两个哈希表建立起地理位置和下标的对应关系）
 * 建立完成后，使用 Dijkstra 算法算出最短路径，注意使用一个数组保存

wqlin

from collections import Iterable


def flatten(items, ignore_types=(str, bytes)):
    """flatten a nested sequence
    implement it based on Python Cookbook(version 3) 4.14 Flattening a Nested Sequence"""
    for x in items:
        if isinstance(x, Iterable) and not isinstance(x, ignore_types):
            yield from flatten(x, ignore_types)
        else: