diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/.keep" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/.keep" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/items.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/items.py"
new file mode 100644
index 0000000000000000000000000000000000000000..9d6efdf8b8f8d8f89ce6cf9e041154b1ca2ba69e
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/items.py"
@@ -0,0 +1,16 @@
+# Define here the models for your scraped items
+#
+# See documentation in:
+# https://docs.scrapy.org/en/latest/topics/items.html
+
+import scrapy
+
+
+class JdCrawlerScrapyItem(scrapy.Item):
+    # define the fields for your item here like:
+    sku_id = scrapy.Field()
+    img = scrapy.Field()
+    price = scrapy.Field()
+    title = scrapy.Field()
+    shop = scrapy.Field()
+    icons = scrapy.Field()
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/middlewares.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/middlewares.py"
new file mode 100644
index 0000000000000000000000000000000000000000..3b6a2c4adc17a8ef5ebe27fcd44115514c3e2000
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/middlewares.py"
@@ -0,0 +1,180 @@
+# Define here the models for your spider middleware
+#
+# See documentation in:
+# https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+import hashlib
+import weakref
+
+from scrapy import signals
+
+# useful for handling different item types with a single interface
+from itemadapter import is_item, ItemAdapter
+from scrapy.downloadermiddlewares.retry import RetryMiddleware
+from scrapy.utils.response import response_status_message
+from scrapy.dupefilters import RFPDupeFilter
+from scrapy.utils.python import to_bytes
+from w3lib.url import canonicalize_url
+
+
+class JdSearchSpiderMiddleware:
+    # Not all methods need to be defined. If a method is not defined,
+    # scrapy acts as if the spider middleware does not modify the
+    # passed objects.
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        # This method is used by Scrapy to create your spiders.
+        s = cls()
+        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
+        return s
+
+    def process_spider_input(self, response, spider):
+        # Called for each response that goes through the spider
+        # middleware and into the spider.
+
+        # Should return None or raise an exception.
+        return None
+
+    def process_spider_output(self, response, result, spider):
+        # Called with the results returned from the Spider, after
+        # it has processed the response.
+
+        # Must return an iterable of Request, or item objects.
+        for i in result:
+            yield i
+
+    def process_spider_exception(self, response, exception, spider):
+        # Called when a spider or process_spider_input() method
+        # (from other spider middleware) raises an exception.
+
+        # Should return either None or an iterable of Request or item objects.
+        pass
+
+    def process_start_requests(self, start_requests, spider):
+        # Called with the start requests of the spider, and works
+        # similarly to the process_spider_output() method, except
+        # that it doesn’t have a response associated.
+
+        # Must return only requests (not items).
+        for r in start_requests:
+            yield r
+
+    def spider_opened(self, spider):
+        spider.logger.info('Spider opened: %s' % spider.name)
+
+
+class JdSearchDownloaderMiddleware:
+    # Not all methods need to be defined. If a method is not defined,
+    # scrapy acts as if the downloader middleware does not modify the
+    # passed objects.
+
+    @classmethod
+    def from_crawler(cls, crawler):
+        # This method is used by Scrapy to create your spiders.
+        s = cls()
+        crawler.signals.connect(s.spider_opened, signal=signals.spider_opened)
+        return s
+
+    def process_request(self, request, spider):
+        # Called for each request that goes through the downloader
+        # middleware.
+
+        # Must either:
+        # - return None: continue processing this request
+        # - or return a Response object
+        # - or return a Request object
+        # - or raise IgnoreRequest: process_exception() methods of
+        #   installed downloader middleware will be called
+        return None
+
+    def process_response(self, request, response, spider):
+        # Called with the response returned from the downloader.
+
+        # Must either;
+        # - return a Response object
+        # - return a Request object
+        # - or raise IgnoreRequest
+        return response
+
+    def process_exception(self, request, exception, spider):
+        # Called when a download handler or a process_request()
+        # (from other downloader middleware) raises an exception.
+
+        # Must either:
+        # - return None: continue processing this exception
+        # - return a Response object: stops process_exception() chain
+        # - return a Request object: stops process_exception() chain
+        pass
+
+    def spider_opened(self, spider):
+        spider.logger.info('Spider opened: %s' % spider.name)
+
+
+class JdSearchUAMiddleware:
+
+    def process_request(self, request, spider):
+        # This method is used by Scrapy to add user agent headers.
+        request.headers["user-agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36"
+
+
+# W11_L1 Retry 中间件
+class JdSearchRetryMiddleware(RetryMiddleware):
+
+    def process_response(self, request, response, spider):
+        if request.meta.get('dont_retry', False):
+            return response
+        if "验证码" in response.text:
+            reason = response_status_message(response.status)
+            return self._retry(request, reason, spider) or response
+        return response
+
+    def process_exception(self, request, exception, spider):
+        if isinstance(exception, IndexError):
+            retry_times = request.meta.get('retry_times', 1)
+            request.meta['retry_time'] = retry_times - 1
+            return request
+
+
+# W11_L1 filter
+_fingerprint_cache = weakref.WeakKeyDictionary()
+class JdSearchRfpDupeMiddleware(RFPDupeFilter):
+    def request_fingerprint(self, request, include_headers=None, keep_fragments=False):
+        cache = _fingerprint_cache.setdefault(request, {})
+        cache_key = (include_headers, keep_fragments)
+        if cache_key not in cache:
+            fp = hashlib.sha1()
+            fp.update(to_bytes(request.method))
+            fp.update(to_bytes(canonicalize_url(request.url, keep_fragments=keep_fragments)))
+            fp.update(request.body or b'')
+            fp.update(request.meta.get("batch_no", "").encode("utf-8"))
+            cache[cache_key] = fp.hexdigest()
+        return cache[cache_key]
+
+
+# W11_L2 异常处理重试中间件,处理 http code 为 403/500 时候的异常
+from twisted.internet import defer
+from twisted.internet.error import DNSLookupError, TimeoutError, \
+    ConnectionLost, ConnectionDone, ConnectError, TCPTimedOutError, \
+    ConnectionRefusedError
+from scrapy.http import HtmlResponse
+from twisted.web.client import ResponseFailed
+from scrapy.core.downloader.handlers.http11 import TunnelError
+
+class ProcessAllExceptionMiddleware(object):
+    ALL_EXCEPTIONS = (defer.TimeoutError, TimeoutError, DNSLookupError,
+                           ConnectionRefusedError, ConnectionDone, ConnectError,
+                           ConnectionLost, TCPTimedOutError, ResponseFailed,
+                           IOError, TunnelError)
+
+    def process_response(self, request, response, spider):
+        if str(response.status).startswith('4') or str(response.status).startswith('5'):
+            response = HtmlResponse(url='')
+            return response
+        return response
+
+    def process_exception(self, request, exception, spider):
+        if isinstance(exception, self.ALL_EXCEPTIONS):
+            print("get exception %s" % exception)
+            response = HtmlResponse(url='exception')
+            return response
+        print("no exception")
\ No newline at end of file
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/pipelines.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/pipelines.py"
new file mode 100644
index 0000000000000000000000000000000000000000..b4394ab0d543e7de925abf03e34d1a2851eaefaa
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/pipelines.py"
@@ -0,0 +1,30 @@
+# Define your item pipelines here
+#
+# Don't forget to add your pipeline to the ITEM_PIPELINES setting
+# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
+
+
+# useful for handling different item types with a single interface
+from itemadapter import ItemAdapter
+from jd_crawler_scrapy.items import JdCrawlerScrapyItem
+import pymysql
+
+
+class JdCrawlerScrapyPipeline:
+    def __init__(self):
+        self.mysql_con = None
+
+    def process_item(self, item, spider):
+        if not self.mysql_con:
+            self.mysql_con = pymysql.connect(**spider.settings["MYSQL_CONF"])
+
+        if isinstance(item, JdCrawlerScrapyItem):
+            cursor = self.mysql_con.cursor()
+            SQL = """INSERT INTO jd_search(sku_id, img, price, title, shop, icons)
+                     VALUES ('{}', '{}', '{}', '{}', '{}', '{}')""".format(
+                item['sku_id'], item['img'], item['price'], item['title'], item['shop'], item['icons']
+            )
+            cursor.execute(SQL)
+            self.mysql_con.commit()
+            cursor.close()
+        return item
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/run.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/run.py"
new file mode 100644
index 0000000000000000000000000000000000000000..d65b88a0b2aeb9dfeeb123844ab46fd82295043f
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/run.py"
@@ -0,0 +1,4 @@
+from scrapy import cmdline
+
+command = "scrapy crawl jd_search".split()
+cmdline.execute(command)
\ No newline at end of file
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/settings.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/settings.py"
new file mode 100644
index 0000000000000000000000000000000000000000..8e4415b059f15d1921568c2be4c3cbb52d80819b
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/settings.py"
@@ -0,0 +1,113 @@
+# Scrapy settings for jd_crawler_scrapy project
+#
+# For simplicity, this file contains only settings considered important or
+# commonly used. You can find more settings consulting the documentation:
+#
+#     https://docs.scrapy.org/en/latest/topics/settings.html
+#     https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
+#     https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+
+BOT_NAME = 'jd_crawler_scrapy'
+
+SPIDER_MODULES = ['jd_crawler_scrapy.spiders']
+NEWSPIDER_MODULE = 'jd_crawler_scrapy.spiders'
+
+
+# Crawl responsibly by identifying yourself (and your website) on the user-agent
+#USER_AGENT = 'jd_crawler_scrapy (+http://www.yourdomain.com)'
+
+# Obey robots.txt rules
+ROBOTSTXT_OBEY = False
+
+# Enable redirect
+REDIRECT_ENABLE = False
+
+# Retry
+RETRY_ENABLE = False
+RETRY_HTTP_CODES = [500, 502, 503, 504, 408, 429]
+
+
+# Configure maximum concurrent requests performed by Scrapy (default: 16)
+CONCURRENT_REQUESTS = 1
+
+# Configure a delay for requests for the same website (default: 0)
+# See https://docs.scrapy.org/en/latest/topics/settings.html#download-delay
+# See also autothrottle settings and docs
+DOWNLOAD_DELAY = 3
+# The download delay setting will honor only one of:
+# CONCURRENT_REQUESTS_PER_DOMAIN = 16
+#CONCURRENT_REQUESTS_PER_IP = 16
+
+# Disable cookies (enabled by default)
+#COOKIES_ENABLED = False
+
+# Disable Telnet Console (enabled by default)
+#TELNETCONSOLE_ENABLED = False
+
+# Override the default request headers:
+#DEFAULT_REQUEST_HEADERS = {
+#   'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
+#   'Accept-Language': 'en',
+#}
+
+# Enable or disable spider middlewares
+# See https://docs.scrapy.org/en/latest/topics/spider-middleware.html
+#SPIDER_MIDDLEWARES = {
+#    'jd_crawler_scrapy.middlewares.JdCrawlerScrapySpiderMiddleware': 543,
+#}
+
+# Enable or disable downloader middlewares
+# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html
+DOWNLOADER_MIDDLEWARES = {
+   # 'jd_crawler_scrapy.middlewares.JdCrawlerScrapyDownloaderMiddleware': 543,
+   'jd_crawler_scrapy.middlewares.UAMiddleware': 100,
+   'jd_crawler_scrapy.middlewares.MyRetryMiddleware': 200,
+}
+
+# Enable or disable extensions
+# See https://docs.scrapy.org/en/latest/topics/extensions.html
+#EXTENSIONS = {
+#    'scrapy.extensions.telnet.TelnetConsole': None,
+#}
+
+# Configure item pipelines
+# See https://docs.scrapy.org/en/latest/topics/item-pipeline.html
+ITEM_PIPELINES = {
+   'jd_crawler_scrapy.pipelines.JdCrawlerScrapyPipeline': 300,
+}
+
+# Enable and configure the AutoThrottle extension (disabled by default)
+# See https://docs.scrapy.org/en/latest/topics/autothrottle.html
+#AUTOTHROTTLE_ENABLED = True
+# The initial download delay
+#AUTOTHROTTLE_START_DELAY = 5
+# The maximum download delay to be set in case of high latencies
+#AUTOTHROTTLE_MAX_DELAY = 60
+# The average number of requests Scrapy should be sending in parallel to
+# each remote server
+#AUTOTHROTTLE_TARGET_CONCURRENCY = 1.0
+# Enable showing throttling stats for every response received:
+#AUTOTHROTTLE_DEBUG = False
+
+# Enable and configure HTTP caching (disabled by default)
+# See https://docs.scrapy.org/en/latest/topics/downloader-middleware.html#httpcache-middleware-settings
+#HTTPCACHE_ENABLED = True
+#HTTPCACHE_EXPIRATION_SECS = 0
+#HTTPCACHE_DIR = 'httpcache'
+#HTTPCACHE_IGNORE_HTTP_CODES = []
+#HTTPCACHE_STORAGE = 'scrapy.extensions.httpcache.FilesystemCacheStorage'
+
+# MYSQL CONF
+MYSQL_CONF = {
+    "host": "127.0.0.1",
+    "user": "root",
+    "password": "qwe369",
+    "db": "tunan_class"
+}
+
+# LOG
+LOG_FILE = "H:/log/jd_search.log"
+LOG_LEVEL = "ERROR"
+
+# DUP
+DUPEFILTER_CLASS = "jd_crawler_scrapy.middlewares.MyRFPDupeFilter"
\ No newline at end of file
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/spiders/jd_search.py" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/spiders/jd_search.py"
new file mode 100644
index 0000000000000000000000000000000000000000..8fa2525c049d9630ae92115cfb0c63211723d633
--- /dev/null
+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\200\344\272\214\350\212\202/jd_crawler_scrapy/spiders/jd_search.py"
@@ -0,0 +1,64 @@
+import scrapy
+from bs4 import BeautifulSoup
+import json
+from items import JdCrawlerScrapyItem
+from twisted.internet.error import TimeoutError
+from scrapy.spidermiddlewares.httperror import HttpError
+
+
+class JdSearchSpider(scrapy.Spider):
+    name = "jd_search"
+
+    def start_requests(self):
+        search_array = ["手机", "电脑", "显卡", "内存"]
+        for keyword in search_array:
+            for page in range(1, 4):
+                url = f'https://search.jd.com/Search?keyword={keyword}&page={page}'
+
+                yield scrapy.FormRequest(
+                    dont_filter=False,
+                    url=url,
+                    method='GET',
+                    errback=self.err_back,
+                    callback=self.parse_search
+                )
+
+
+    def parse_search(self, response):
+        html = response.text
+        soup = BeautifulSoup(html, 'lxml')
+        content = soup.select("ul[class='gl-warp clearfix'] li[class='gl-item']")
+        for item in content:
+            try:
+                sku_id = item.attrs["data-sku"]
+                img = item.select("img[data-img='1']")
+                price = item.select("div[class='p-price']")
+                title = item.select("div[class='p-name p-name-type-2'] em")
+                shop = item.select("div[class='p-shop']")
+                icons = item.select("div[class='p-icons']")
+
+                img = img[0].attrs['data-lazy-img'] if img else ""
+                price = price[0].strong.i.text.strip() if price else ""
+                title = title[0].text.strip() if title else ""
+                shop = shop[0].text.strip() if shop else ""
+                icons = json.dumps([ele.text.strip() for ele in icons[0].select('i')]) if icons else '[]'
+
+                items = JdCrawlerScrapyItem()
+                items["sku_id"] = sku_id
+                items["img"] = img
+                items["price"] = price
+                items["title"] = title
+                items["shop"] = shop
+                items["icons"] = icons
+                yield items
+
+            except Exception as e:
+                print(e.args)
+
+
+    def err_back(self, failure):
+        if failure.check(TimeoutError):
+            print('Timeout error on %s website', failure.request.url)
+        elif failure.check(HttpError):
+            response = failure.value.response
+            print('HttpError on %s' % response.url)
\ No newline at end of file
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\211\350\212\202/.keep" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\211\350\212\202/.keep"
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index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\211\350\212\202/radis\345\237\272\347\241\200.md" "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\211\350\212\202/radis\345\237\272\347\241\200.md"
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index 0000000000000000000000000000000000000000..cdc2b991a04a439cae21172129e8f5d5d999e968
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+++ "b/\347\254\254\344\272\214\346\234\237\350\256\255\347\273\203\350\220\245/4\347\217\255/4\347\217\255_LiPing/\347\254\254\345\215\201\344\270\200\345\221\250/\347\254\254\344\270\211\350\212\202/radis\345\237\272\347\241\200.md"
@@ -0,0 +1,306 @@
+# 第十一周-第三节课
+
+## redis简单介绍
+
+```
+https://redis.io/
+```
+
+- 什么是redis?
+
+  `remote dictionary server`, 远程字典服务. 顾名思义, redis的基础存储方式是键对值, 是一种常用的非关系型数据库.
+
+- redis的特点
+
+  - 内存操作, 相对于传统数据库从硬盘上读取数据速度, 快了一个数量级.
+
+  - redis服务是**单线程工作模式**, 不会产生一般的并发问题.
+
+    在我们使用多线程或者多进程去进行一般IO操作会发生读写冲突. 如果我们的多线程和多进程程序去读取redis消息队列当中的值时, 由于redis是单线程工作模式, 读事件和写事件都会按顺序执行, 避免了并发问题.
+
+## redis的安装
+
+- 服务端
+
+  - windows
+
+    ```
+    https://github.com/microsoftarchive/redis
+    ```
+
+  - ubuntu
+
+    ```
+    apt-get install redis-server
+    ```
+
+  - mac
+
+    ```
+    brew install redis
+    ```
+
+- 客户端
+
+  - windows
+
+    - redis-desktop
+
+  - ubuntu
+
+    ```
+    # 没有图形界面
+    apt-get install redis-cli
+    ```
+
+  - mac
+
+    ```
+    medis
+    ```
+
+  - python连接
+
+    ```
+    pip install redis
+    ```
+
+    ```
+    import redis
+    
+    # 指定使用的database
+    redis_con = redis.Redis(host='localhost', port=6379, db=2)
+    ```
+
+## redis的数据类型和CRUD
+
+```
+通过redis-cli命名进行连接
+
+redis-cli -h localhost -p 6379
+
+# 选择使用的数据库
+C:\Users\TuNan>redis-cli
+127.0.0.1:6379> select 2
+OK
+127.0.0.1:6379[2]>
+
+# 查看当前库下所有的key
+127.0.0.1:6379[2]> keys *
+```
+
+- String
+
+  - Create
+
+    ```
+    set key value
+    ```
+
+  - Retrieve
+
+    ```
+    get key
+    ```
+
+  - Update
+
+    ```
+    set key  value
+    ```
+
+  - Delete
+
+    ```
+    del key
+    ```
+
+- Hash
+
+  - Create
+
+    ```
+    hset 变量名 key value
+    ```
+
+  - Retrieve
+
+    ```
+    hget 变量名 key
+    ```
+
+  - Update
+
+    ```
+    hset 变量名 key value
+    ```
+
+  - Delete
+
+    ```
+    hdel 变量名 key
+    ```
+
+- List
+
+  - Create
+
+    ```
+    lpush 变量名 value
+    ```
+
+  - Retrieve
+
+    - 通过索引取值
+
+      ```
+      lindex 变量名 索引值
+      
+      lindex 'list_test' 1
+      ```
+
+    - 通过索引取一定范围的值
+
+      ```
+      lrange 变量名 start end
+      
+      lrange 'list_test' 0 2
+      ```
+
+  - Update
+
+    ```
+    linsert 变量名 before[after] pivot value
+    
+    linsert 'list_test' before 'a' 'b'
+    ```
+
+  - Delete
+
+    - rpop
+
+      从右侧, 也就是list**的末尾移除一个元素并返回**
+
+      ```
+      rpop 'list_test'
+      ```
+
+    - lpop
+
+      从左侧, 也就是头部移除一个元素并返回
+
+    - lrem
+
+      删除一定数目的元素
+
+      ```
+      lrem 变量名 删除个数,  删除元素
+      ```
+
+- Set
+
+  - Create
+
+    ```
+    sadd 变量名 value
+    ```
+
+  - Retrieve
+
+    - 获取集合中的所有成员
+
+      ```
+      smembers 变量名
+      ```
+
+    - 判断当前元素是否在集合当中
+
+      ```
+      sismember 变量名 value
+      sismember 'set_test' 2
+      ```
+
+    - 返回随机数
+
+      ```
+      srandmember 变量名 随机返回的数量
+      srandmember 'set_test' 2
+      ```
+
+  - Update
+
+    无
+
+  - Delete
+
+    ```
+    spop 变量名
+    ```
+
+- Zset
+
+  有序集合
+
+  > 可以通过有序集合完成一个复杂的优先级队列
+
+  - create
+
+    ```
+    zadd 变量名 分数 value
+    ```
+
+  - Retrieve
+
+    - 返回当前成员数
+
+      ```
+      zcard 'zset_test'
+      ```
+
+    - 获取一定分数区间的成员数
+
+      ```
+      zcount 变量名 min_score max_score
+      ```
+
+    - 通过一定分数区间获取值
+
+      ```
+      zrangebyscore 变量名 min_score max_score
+      
+      zrangebyscore 'zset_test' 2 1
+      ```
+
+  - Update
+
+    - 加分
+
+      ```
+      zincrby 变量 加分值 value
+      
+      zincrby 'zset_test' 1 'b'
+      ```
+
+  - Delete
+
+    - 根据排名移除成员
+
+      ```
+      zremrangebyrank 变量名 start stop
+      
+      zremrangebyrank 'zset_test' 1 2
+      ```
+
+    - 根据分数移除成员
+
+      ```
+      zremrangebyscore 变量名 min_score max_score
+      
+      zremrangebyscore 'zset_test' 2 2
+      ```
+
+## 课后作业
+
+- 完成redis服务端和客户端的搭建
+- 练习String, List, Hash, Set的CRUD练习
+- 扩展: 练习Zset的CRUD
\ No newline at end of file