/// <summary>
/// 1.0 加载所有的类别list集合
/// </summary>
private List <Category> LoadCategories()
{
//0：加载国美的数据的所有分类
string url = "http://list.gome.com.cn/";
//1：找到所有的类别对应的URL
string docHtml = HttpTools.Get(url);
GM_Crawler center = new GM_Crawler();
List <Category> tempCateList = center.GetAllCategoryURl(docHtml);
//2：获取各个类别的父级菜单
List <Category> cateList = new List <Category>();
//3：用于排除同一个二级菜单多次请求的问题
List <string> twoCategory = new List <string>();
foreach (var item in tempCateList)
{
if (!twoCategory.Contains(item.ParentCode))
{
twoCategory.Add(item.ParentCode);
var strDoc = HttpTools.Get(item.Url);
cateList.AddRange(center.GetAllCategoryList(strDoc));
}
}
Console.WriteLine("{0}国美所有类别已经都加载完了{1}", prefix, prefix);
return(cateList);
}
private void LoadCommodities(List <Category> cateList)
{
List <GM_Commodity> commodityList = new List <GM_Commodity>();
//1:获取有URL的类别集合
List <Category> newList = cateList.Where(u => !string.IsNullOrEmpty(u.Url) && u.Name.Equals("手机")).ToList();
//2:开始十个线程和一个监控线程，用来检查是否有异常
Task[] tasks = new Task[11];
TaskFactory taskFactory = new TaskFactory();
tasks[0] = taskFactory.StartNew(() =>
{
while (!cts.IsCancellationRequested)
{
Thread.Sleep(100);
Console.WriteLine("由于抓取数据异常,所以线程中断了");
}
}, cts.Token);
//3:将所有类别的数据分为10等份，开启10个线程各自抓取数据
var cateLen = newList.Count;
var avgCount = cateLen % 10 == 0 ? cateLen / 10 : (cateLen / 10 + 1);
GM_Crawler crawler = new GM_Crawler();
for (int i = 1; i < 11; i++)
{
tasks[i] = taskFactory.StartNew((num) =>
{
var startCate = (Convert.ToInt16(num) - 1) * avgCount;
var endCate = Convert.ToInt16(num) * avgCount;
if (endCate > cateLen)
{
endCate = cateLen;
}
for (int j = startCate; j < endCate; j++)
{
Category category = newList[j];
//commodityList.AddRange(crawler.GetCategoryDetails(category));
}
}, i, cts.Token);
}
taskFactory.ContinueWhenAll(tasks, (ts) =>
{
Console.WriteLine("所有的类别明细都已经加载完成");
});
}
private void btnStart_Click(object sender, EventArgs e)
{
try
{
GM_Crawler crawler = new GM_Crawler();
Category category = new Category();
category.Url = "http://list.gome.com.cn/cat10000070.html";
List <GM_Commodity> list = crawler.GetCategoryDetails(category.Url, 1);
////1：加载分类
//List<Category> cateList = LoadCategories();
////2：开启多线程，加载明细
//LoadCommodities(cateList);
}
catch (Exception ex)
{
//出现异常中断其他运行的线程
cts.Cancel();
Console.WriteLine("页面抓取出现异常:{0}", ex.Message);
}
}
