功能比较全的StackExchange.Redis封装帮助类(.Net/C#)
Redis官网https://redis.io/
以下内容未全部验证,如有问题请指出
//static NewtonsoftSerializer serializer = new NewtonsoftSerializer();
//static StackExchangeRedisCacheClient cacheClient = new StackExchangeRedisCacheClient(serializer);
//private static IDatabase db = cacheClient.Database; private static string connstr = System.Configuration.ConfigurationManager.AppSettings["redisCacheClient"];// "127.0.0.1:6379,allowadmin=true";
private static ConnectionMultiplexer conn = ConnectionMultiplexer.Connect(connstr);
private static IDatabase db = conn.GetDatabase(1); /// <summary>
/// 获取系统的redis key前缀
/// </summary>
/// <param name="resourceid">资源Id</param>
/// <returns></returns>
public static string GetMyKey(string resourceid = "")
{ string Key = "report_";
if (!string.IsNullOrWhiteSpace(resourceid))
{
Key = string.Format("report_res_{0}", resourceid);
}
return Key;
} #region String 可以设置过期时间 同步 /// <summary>
/// 保存单个key value
/// </summary>
/// <param name="key">Redis Key</param>
/// <param name="value">保存的值</param>
/// <param name="expiry">过期时间</param>
/// <returns></returns>
public static bool SetStringKey(string key, string value, TimeSpan? expiry = default(TimeSpan?))
{ return db.StringSet(key, value, expiry);
} /// <summary>
/// 保存多个key value
/// </summary>
/// <param name="arr">key</param>
/// <returns></returns>
public static bool SetStringKey(KeyValuePair<RedisKey, RedisValue>[] arr)
{
return db.StringSet(arr);
} /// <summary>
/// 保存一个对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="obj"></param>
/// <returns></returns>
public static bool SetStringKey<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
{
string json = JsonConvert.SerializeObject(obj);
return db.StringSet(key, json, expiry);
} /// <summary>
/// 获取单个key的值
/// </summary>
/// <param name="key">Redis Key</param>
/// <returns></returns> public static RedisValue GetStringKey(string key)
{
return db.StringGet(key);
} /// <summary>
/// 获取多个Key
/// </summary>
/// <param name="listKey">Redis Key集合</param>
/// <returns></returns>
public static RedisValue[] GetStringKey(List<RedisKey> listKey)
{
return db.StringGet(listKey.ToArray());
} /// <summary>
/// 获取一个key的对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static T GetStringKey<T>(string key)
{
return JsonConvert.DeserializeObject<T>(db.StringGet(key));
}
/// <summary>
/// 为数字增长val
/// </summary>
/// <param name="key"></param>
/// <param name="val">可以为负</param>
/// <returns>增长后的值</returns>
public double StringIncrement(string key, double val = 1)
{
return db.StringIncrement(key, val);
} /// <summary>
/// 为数字减少val
/// </summary>
/// <param name="key"></param>
/// <param name="val">可以为负</param>
/// <returns>减少后的值</returns>
public double StringDecrement(string key, double val = 1)
{
return db.StringDecrement(key, val);
} #endregion #region String 可以设置过期时间 异步 /// <summary>
/// 保存单个key value
/// </summary>
/// <param name="key">Redis Key</param>
/// <param name="value">保存的值</param>
/// <param name="expiry">过期时间</param>
/// <returns></returns>
public static async Task<bool> SetStringKeyAsync(string key, string value, TimeSpan? expiry = default(TimeSpan?))
{ return await db.StringSetAsync(key, value, expiry);
} /// <summary>
/// 保存多个key value
/// </summary>
/// <param name="arr">key</param>
/// <returns></returns>
public static async Task<bool> SetStringKeyAsync(KeyValuePair<RedisKey, RedisValue>[] arr)
{
return await db.StringSetAsync(arr);
} /// <summary>
/// 保存一个对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="obj"></param>
/// <returns></returns>
public static async Task<bool> SetStringKeyAsync<T>(string key, T obj, TimeSpan? expiry = default(TimeSpan?))
{
string json = JsonConvert.SerializeObject(obj);
return await db.StringSetAsync(key, json, expiry);
} /// <summary>
/// 获取单个key的值
/// </summary>
/// <param name="key">Redis Key</param>
/// <returns></returns> public static async Task<RedisValue> GetStringKeyAsync(string key)
{
return await db.StringGetAsync(key);
} /// <summary>
/// 获取多个Key
/// </summary>
/// <param name="listKey">Redis Key集合</param>
/// <returns></returns>
public static async Task<RedisValue[]> GetStringKeyAsync(List<RedisKey> listKey)
{
return await db.StringGetAsync(listKey.ToArray());
} /// <summary>
/// 获取一个key的对象
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static async Task<T> GetStringKeyAsync<T>(string key)
{
return JsonConvert.DeserializeObject<T>(await db.StringGetAsync(key));
}
/// <summary>
/// 为数字增长val
/// </summary>
/// <param name="key"></param>
/// <param name="val">可以为负</param>
/// <returns>增长后的值</returns>
public async Task<double> StringIncrementAsync(string key, double val = 1)
{
return await db.StringIncrementAsync(key, val);
} /// <summary>
/// 为数字减少val
/// </summary>
/// <param name="key"></param>
/// <param name="val">可以为负</param>
/// <returns>减少后的值</returns>
public async Task<double> StringDecrementAsync(string key, double val = 1)
{
return await db.StringDecrementAsync(key, val);
}
#endregion #region Hash 同步
/// <summary>
/// 存储数据到hash表
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="dataKey"></param>
/// <param name="t"></param>
/// <returns></returns>
public static bool HashSet1<T>(string key, string dataKey, List<T> t)
{
string json = "";
foreach (var item in t)
{
json = JsonConvert.SerializeObject(item);
//listHashEntry.Add(new HashEntry(getModelId(item), json));
}
return db.HashSet(key, dataKey, json); //return await ({
// string json = ConvertJson(t);
// return db.HashSetAsync(key, dataKey, json);
//});
}
/// <summary>
/// 保存一个集合
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">Redis Key</param>
/// <param name="list">数据集合</param>
/// <param name="getModelId"></param>
public static void HashSet<T>(string key, List<T> list, Func<T, string> getModelId)
{
List<HashEntry> listHashEntry = new List<HashEntry>();
foreach (var item in list)
{
string json = JsonConvert.SerializeObject(item);
listHashEntry.Add(new HashEntry(getModelId(item), json));
}
db.HashSet(key, listHashEntry.ToArray());
} /// <summary>
/// 获取Hash中的单个key的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">Redis Key</param>
/// <param name="hasFildValue">RedisValue</param>
/// <returns></returns>
public static T GetHashKey<T>(string key, string hasFildValue)
{
if (!string.IsNullOrWhiteSpace(key) && !string.IsNullOrWhiteSpace(hasFildValue))
{
RedisValue value = db.HashGet(key, hasFildValue);
if (!value.IsNullOrEmpty)
{
return JsonConvert.DeserializeObject<T>(value);
}
}
return default(T);
} /// <summary>
/// 获取hash中的多个key的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">Redis Key</param>
/// <param name="listhashFields">RedisValue value</param>
/// <returns></returns>
public static List<T> GetHashKey<T>(string key, List<RedisValue> listhashFields)
{
List<T> result = new List<T>();
if (!string.IsNullOrWhiteSpace(key) && listhashFields.Count > 0)
{
RedisValue[] value = db.HashGet(key, listhashFields.ToArray());
foreach (var item in value)
{
if (!item.IsNullOrEmpty)
{
result.Add(JsonConvert.DeserializeObject<T>(item));
}
}
}
return result;
} /// <summary>
/// 获取hashkey所有Redis key
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static List<T> GetHashAll<T>(string key)
{
List<T> result = new List<T>();
RedisValue[] arr = db.HashKeys(key);
foreach (var item in arr)
{
if (!item.IsNullOrEmpty)
{
result.Add(JsonConvert.DeserializeObject<T>(item));
}
}
return result;
} /// <summary>
/// 获取hashkey所有的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static List<T> HashGetAll<T>(string key)
{
List<T> result = new List<T>();
HashEntry[] arr = db.HashGetAll(key);
foreach (var item in arr)
{
if (!item.Value.IsNullOrEmpty)
{
result.Add(JsonConvert.DeserializeObject<T>(item.Value));
}
}
return result;
} /// <summary>
/// 删除hasekey
/// </summary>
/// <param name="key"></param>
/// <param name="hashField"></param>
/// <returns></returns>
public static bool DeleteHase(RedisKey key, RedisValue hashField)
{
return db.HashDelete(key, hashField);
} #endregion #region Hash 异步
/// <summary>
/// 存储数据到hash表
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <param name="dataKey"></param>
/// <param name="t"></param>
/// <returns></returns>
public static async Task<bool> HashSetAsync<T>(string key, string dataKey, List<T> t)
{
string json = "";
foreach (var item in t)
{
json = JsonConvert.SerializeObject(item);
}
return await db.HashSetAsync(key, dataKey, json); } /// <summary>
/// 获取Hash中的单个key的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">Redis Key</param>
/// <param name="hasFildValue">RedisValue</param>
/// <returns></returns>
public static async Task<T> GetHashKeyAsync<T>(string key, string hasFildValue)
{
if (!string.IsNullOrWhiteSpace(key) && !string.IsNullOrWhiteSpace(hasFildValue))
{
RedisValue value = await db.HashGetAsync(key, hasFildValue);
if (!value.IsNullOrEmpty)
{
return JsonConvert.DeserializeObject<T>(value);
}
}
return default(T);
} /// <summary>
/// 获取hash中的多个key的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key">Redis Key</param>
/// <param name="listhashFields">RedisValue value</param>
/// <returns></returns>
public static async Task<List<T>> GetHashKeyAsync<T>(string key, List<RedisValue> listhashFields)
{
List<T> result = new List<T>();
if (!string.IsNullOrWhiteSpace(key) && listhashFields.Count > 0)
{
RedisValue[] value = await db.HashGetAsync(key, listhashFields.ToArray());
foreach (var item in value)
{
if (!item.IsNullOrEmpty)
{
result.Add(JsonConvert.DeserializeObject<T>(item));
}
}
}
return result;
} /// <summary>
/// 获取hashkey所有Redis key
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static async Task<List<T>> GetHashAllAsync<T>(string key)
{
List<T> result = new List<T>();
RedisValue[] arr =await db.HashKeysAsync(key);
foreach (var item in arr)
{
if (!item.IsNullOrEmpty)
{
result.Add(JsonConvert.DeserializeObject<T>(item));
}
}
return result;
} /// <summary>
/// 获取hashkey所有的值
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public static async Task<List<T>> HashGetAllAsync<T>(string key)
{
List<T> result = new List<T>();
HashEntry[] arr =await db.HashGetAllAsync(key);
foreach (var item in arr)
{
if (!item.Value.IsNullOrEmpty)
{
result.Add(JsonConvert.DeserializeObject<T>(item.Value));
}
}
return result;
} /// <summary>
/// 删除hasekey
/// </summary>
/// <param name="key"></param>
/// <param name="hashField"></param>
/// <returns></returns>
public static async Task<bool> DeleteHaseAsync(RedisKey key, RedisValue hashField)
{
return await db.HashDeleteAsync(key, hashField);
} #endregion #region key 同步 /// <summary>
/// 删除单个key
/// </summary>
/// <param name="key">redis key</param>
/// <returns>是否删除成功</returns>
public static bool KeyDelete(string key)
{
return db.KeyDelete(key);
} /// <summary>
/// 删除多个key
/// </summary>
/// <param name="keys">rediskey</param>
/// <returns>成功删除的个数</returns>
public static long keyDelete(RedisKey[] keys)
{
return db.KeyDelete(keys);
} /// <summary>
/// 判断key是否存储
/// </summary>
/// <param name="key">redis key</param>
/// <returns></returns>
public static bool KeyExists(string key)
{
return db.KeyExists(key);
} /// <summary>
/// 重新命名key
/// </summary>
/// <param name="key">就的redis key</param>
/// <param name="newKey">新的redis key</param>
/// <returns></returns>
public static bool KeyRename(string key, string newKey)
{
return db.KeyRename(key, newKey);
} /// <summary>
/// 设置Key的时间
/// </summary>
/// <param name="key">redis key</param>
/// <param name="expiry"></param>
/// <returns></returns>
public static bool KeyExpire(string key, TimeSpan? expiry = default(TimeSpan?))
{
return db.KeyExpire(key, expiry);
}
#endregion #region key 异步 /// <summary>
/// 删除单个key
/// </summary>
/// <param name="key">redis key</param>
/// <returns>是否删除成功</returns>
public static async Task<bool> KeyDeleteAsync(string key)
{
return await db.KeyDeleteAsync(key);
} /// <summary>
/// 删除多个key
/// </summary>
/// <param name="keys">rediskey</param>
/// <returns>成功删除的个数</returns>
public static async Task<long> keyDeleteAsync(RedisKey[] keys)
{
return await db.KeyDeleteAsync(keys);
} /// <summary>
/// 判断key是否存储
/// </summary>
/// <param name="key">redis key</param>
/// <returns></returns>
public static async Task<bool> KeyExistsAsync(string key)
{
return await db.KeyExistsAsync(key);
} /// <summary>
/// 重新命名key
/// </summary>
/// <param name="key">就的redis key</param>
/// <param name="newKey">新的redis key</param>
/// <returns></returns>
public static async Task<bool> KeyRenameAsync(string key, string newKey)
{
return await db.KeyRenameAsync(key, newKey);
} /// <summary>
/// 设置Key的时间
/// </summary>
/// <param name="key">redis key</param>
/// <param name="expiry"></param>
/// <returns></returns>
public static async Task<bool> KeyExpireAsync(string key, TimeSpan? expiry = default(TimeSpan?))
{
return await db.KeyExpireAsync(key, expiry);
}
#endregion #region List 同步 /// <summary>
/// 移除指定ListId的内部List的值
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public void ListRemove<T>(string key, T value)
{
db.ListRemove(key, JsonConvert.SerializeObject(value));
} /// <summary>
/// 获取指定key的List
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public List<T> ListRange<T>(string key)
{
var values = db.ListRange(key);
List<T> result = new List<T>();
foreach (var item in values)
{
var model = JsonConvert.DeserializeObject<T>(item);
result.Add(model);
}
return result;
} /// <summary>
/// 入队
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public void ListRightPush<T>(string key, T value)
{
db.ListRightPush(key, JsonConvert.SerializeObject(value));
} /// <summary>
/// 出队
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public T ListRightPop<T>(string key)
{
var value = db.ListRightPop(key);
return JsonConvert.DeserializeObject<T>(value);
} /// <summary>
/// 获取集合中的数量
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public long ListLength(string key)
{
return db.ListLength(key);
} #endregion 同步方法 #region List 异步 /// <summary>
/// 移除指定ListId的内部List的值
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public async Task<long> ListRemoveAsync<T>(string key, T value)
{
return await db.ListRemoveAsync(key, JsonConvert.SerializeObject(value));
} /// <summary>
/// 获取指定key的List
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public async Task<List<T>> ListRangeAsync<T>(string key)
{
var values =await db.ListRangeAsync(key);
List<T> result = new List<T>();
foreach (var item in values)
{
var model = JsonConvert.DeserializeObject<T>(item);
result.Add(model);
}
return result;
} /// <summary>
/// 入队
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public async Task<long> ListRightPushAsync<T>(string key, T value)
{
return await db.ListRightPushAsync(key, JsonConvert.SerializeObject(value));
} /// <summary>
/// 出队
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="key"></param>
/// <returns></returns>
public async Task<T> ListRightPopAsync<T>(string key)
{
var value = await db.ListRightPopAsync(key);
return JsonConvert.DeserializeObject<T>(value);
} /// <summary>
/// 获取集合中的数量
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public async Task<long> ListLengthAsync(string key)
{
return await db.ListLengthAsync(key);
} #endregion 异步方法 #region SortedSet 同步 /// <summary>
/// 添加
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="score"></param>
public static bool SortedSetAdd<T>(string key, T value, double score)
{
return db.SortedSetAdd(key, JsonConvert.SerializeObject(value), score);
} /// <summary>
/// 删除
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public static bool SortedSetRemove<T>(string key, T value)
{
return db.SortedSetRemove(key, JsonConvert.SerializeObject(value));
} /// <summary>
/// 获取全部
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static List<T> SortedSetRangeByRank<T>(string key)
{
var values = db.SortedSetRangeByRank(key); List<T> result = new List<T>();
foreach (var item in values)
{
var model = JsonConvert.DeserializeObject<T>(item);
result.Add(model);
}
return result;
} /// <summary>
/// 获取集合中的数量
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static long SortedSetLength(string key)
{
return db.SortedSetLength(key);
} #endregion 同步方法 #region SortedSet 异步 /// <summary>
/// 添加
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
/// <param name="score"></param>
public static async Task<bool> SortedSetAddAsync<T>(string key, T value, double score)
{
return await db.SortedSetAddAsync(key, JsonConvert.SerializeObject(value), score);
} /// <summary>
/// 删除
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public static async Task<bool> SortedSetRemoveAsync<T>(string key, T value)
{
return await db.SortedSetRemoveAsync(key, JsonConvert.SerializeObject(value));
} /// <summary>
/// 获取全部
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static async Task<List<T>> SortedSetRangeByRankAsync<T>(string key)
{
var values = await db.SortedSetRangeByRankAsync(key);
List<T> result = new List<T>();
foreach (var item in values)
{
var model = JsonConvert.DeserializeObject<T>(item);
result.Add(model);
}
return result;
} /// <summary>
/// 获取集合中的数量
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public static async Task<long> SortedSetLengthAsync(string key)
{
return await db.SortedSetLengthAsync(key);
} #endregion 异步方法 /// <summary>
/// 追加值
/// </summary>
/// <param name="key"></param>
/// <param name="value"></param>
public static void StringAppend(string key, string value)
{
////追加值,返回追加后长度
long appendlong = db.StringAppend(key, value);
}
功能比较全的StackExchange.Redis封装帮助类(.Net/C#)的更多相关文章
- [C#] 使用 StackExchange.Redis 封装属于自己的 Helper
使用 StackExchange.Redis 封装属于自己的 Helper 目录 核心类 ConnectionMultiplexer 字符串(String) 哈希(Hash) 列表(List) 有序集 ...
- [C#] 使用 StackExchange.Redis 封装属于自己的 RedisHelper
使用 StackExchange.Redis 封装属于自己的 RedisHelper 目录 核心类 ConnectionMultiplexer 字符串(String) 哈希(Hash) 列表(List ...
- 使用 StackExchange.Redis 封装属于自己的 RedisHelper
目录 核心类 ConnectionMultiplexer 字符串(String) 哈希(Hash) 列表(List) 有序集合(sorted set) Key 操作 发布订阅 其他 简介 目前 .NE ...
- StackExchange.Redis 封装
博主最近开始玩Redis啊~~ 看了很多Redis的文章,感觉有点云里雾里的,之前看到是ServiceStack.Redis,看了一些大佬封装的Helper类,还是懵懵的QAQ 没办法啊只能硬着**上 ...
- c#使用 StackExchange.Redis 封装 RedisHelper
公司一直在用.net自带的缓存,大家都知道.net自带缓存的缺点,就不多说了,不知道的可以查一查,领导最近在说分布式缓存,我们选的是redis,领导让我不忙的时候封装一下,搜索了两天,选了选第三方的插 ...
- PHP 操作redis 封装的类 转的
<?php/** * Redis 操作,支持 Master/Slave 的负载集群 * * @author jackluo */class RedisCluster{ // ...
- DotNet Core 使用 StackExchange.Redis 简单封装和实现分布式锁
前言 公司的项目以前一直使用 CSRedis 这个类库来操作 Redis,最近增加了一些新功能,会存储一些比较大的数据,内测的时候发现其中有两台服务器会莫名的报错 Unexpected respons ...
- redis的安装、启动、主从配置,以及.Net下StackExchange.Redis的使用
开门见山,Linux下配个环境真是苦逼死了,这里记录一下,囧 一.环境 服务端:Ubuntu16.04 LTS(虚拟机,redis官方没有window发布版本,而且在Linux下运行更稳定) 客户端: ...
- C# StackExchange.Redis 用法总结
安装 StackExchange.Redis 在 NuGet 中搜索 StackExchange.Redis 和 Newtonsoft.Json,直接点击按钮安装即可. StackExchange.R ...
随机推荐
- 2017-2018 ACM-ICPC, NEERC, Northern Subregional Contest
A. Auxiliary Project 完全背包. #include<stdio.h> #include<iostream> #include<string.h> ...
- 写一个带文本菜单的程序,菜单项如下 (1) 取五个数的和 (2) 取五个数的平均值 (X) 退出。
问题: 写一个带文本菜单的程序,菜单项如下(1) 取五个数的和 (2) 取五个数的平均值(X) 退出. 由用户做一个选择, 然后执行相应的功能.当用户选择退出时程序结束. 实现: ...
- JavaScript浏览器解析原理
首先,JavaScript的特点是: 1. 跨平台 可以再不同的操作系统上运行. 2. 弱类型 与之相对的是强类型 强类型:在定义变量的时候,需要将变量的数据类型表明.例如:Java 弱类型:定义变量 ...
- CSS3_多列布局
CSS3 多列布局 可以随屏幕大小自适应布局 能够创建多个列对文本进行布局 属性 column-count: 5; 将文本分成 5 列 注意: 用户的屏幕大小 column-fill: bala ...
- harpoxy 配置
HAProxy是一个使用C语言编写的自由及开放源代码软件,其提供高可用性.负载均衡,以及基于TCP和HTTP的应用程序代理. HAProxy特别适用于那些负载特大的web站点,这些站点通常又需要会话保 ...
- Pandora 生成 Token
生成 token 打数据到仓库 通过 api 签名工具实现 最后通过curl -XPOST -H "Content-Type: application/json" -H " ...
- HTTP &RFC
HTTP 1,HTTP所表达的控制以及描述性相关的信息都包含在了HTTP的起始行和首部之中.BNF的使用使得自己能够清晰的梳理出起始行和首部中所有类别的元信息.对于每一类的元信息具体包含哪些内容也能够 ...
- Python基础之元组和字典
一.元组: 1.定义: 内存图: 2.基本操作 3.元组作用: 4.元组基础知识代码 # . 创建空元组 t01 = () t02 = tuple() # . 创建具有默认值的元组 t01 = (,, ...
- 基于nutch-1.2实现本地搜索引擎
声明:本博文参考了很多资料,主要来自http://blog.csdn.net/jiutao_tang/article/details/6461884/,http://www.cnblogs.com/x ...
- selenium如何操作HTML5的画布canvas上的元素
话不多少,上图如下,下图红色框内是一个html5的画布,我们要像操作右上角的保存和数据视图的时候是无法公共selenium的普通定位操作到的,那该怎么办呢? 我们先new一个Selenium的acti ...