Redis 是一款依据BSD开源协议发行的高性能Key-Value存储系统(cache and store)。它通常被称为数据结构服务器,因为值(value)可以是 字符串(String), 哈希(Map), 列表(list),集合(sets) 和 有序集合(sorted sets)等类型。
初次使用,先在windows下小试一把,根据网上的资料整理下,以作为日志记录。
1.windows下安装
官网下载的是linux版,windows版在github上,由Microsoft Open Tech group提供的:
https://github.com/MSOpenTech/redis
可以直接点右则Download Zip下载,也可以通过git克隆。
下载后解压到D盘根目录:D:\redis-2.8
bin目录下有个release文件,可以解压bin目录,也可以放到D:\redis-2.8
这里我省事,直接解压到D:\redis-2.8,环境变量懒得配了
2.启动服务端
启动服务:打开cmd,进到目录D:\redis-2.8,执行如下命令:
- redis-server redis.windows.conf
执行后报如下错误:
- D:\redis-2.8>redis-server.exe redis.windows.conf
- [7736] 19 Apr 21:36:42.974 #
- The Windows version of Redis allocates a large memory mapped file for sharing
- the heap with the forked process used in persistence operations. This file
- will be created in the current working directory or the directory specified by
- the 'dir' directive in the .conf file. Windows is reporting that there is
- insufficient disk space available for this file (Windows error 0x70).
- You may fix this problem by either reducing the size of the Redis heap with
- the --maxheap flag, or by starting redis from a working directory with
- sufficient space available for the Redis heap.
- Please see the documentation included with the binary distributions for more
- details on the --maxheap flag.
- Redis can not continue. Exiting.
根据提示,是 maxheap 标识有问题,打开配置文件 redis.windows.conf ,搜索 maxheap , 然后直接指定好内容即可。
- .......
- #
- # maxheap <bytes>
- maxheap 1024000000
- .......
然后再次启动,OK,成功。
- D:\redis-2.8>redis-server redis.windows.conf
- _._
- _.-``__ ''-._
- _.-`` `. `_. ''-._ Redis 2.8.17 (00000000/0) 64 bit
- .-`` .-```. ```\/ _.,_ ''-._
- ( ' , .-` | `, ) Running in stand alone mode
- |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379
- | `-._ `._ / _.-' | PID: 5856
- `-._ `-._ `-./ _.-' _.-'
- |`-._`-._ `-.__.-' _.-'_.-'|
- | `-._`-._ _.-'_.-' | http://redis.io
- `-._ `-._`-.__.-'_.-' _.-'
- |`-._`-._ `-.__.-' _.-'_.-'|
- | `-._`-._ _.-'_.-' |
- `-._ `-._`-.__.-'_.-' _.-'
- `-._ `-.__.-' _.-'
- `-._ _.-'
- `-.__.-'
- [5856] 19 Apr 20:24:12.984 # Server started, Redis version 2.8.17
- [5856] 19 Apr 20:24:12.984 * DB loaded from disk: 0.000 seconds
- [5856] 19 Apr 20:24:12.984 * The server is now ready to accept connections on po
- rt 6379
3.启动客户端测试
根据自带的客户端软件测试,双击打开 redis-cli.exe, 如果不报错,则连接上了本地服务器,然后测试,比如 set命令,get命令:
- 127.0.0.1:6379> set hello redis
- OK
- 127.0.0.1:6379> get hello
- "redis"
- 127.0.0.1:6379>
4.基于Java开发包(Jedis)测试
新建maven工程,添加Jedis依赖:
- <dependency>
- <groupId>redis.clients</groupId>
- <artifactId>jedis</artifactId>
- <version>2.0.0</version>
- <type>jar</type>
- <scope>compile</scope>
- </dependency>
测试类:
- import redis.clients.jedis.Jedis;
- import redis.clients.jedis.JedisPool;
- import redis.clients.jedis.JedisPoolConfig;
- import java.util.HashMap;
- import java.util.Iterator;
- import java.util.List;
- import java.util.Map;
- /**
- * Redis的官方首选Java开发包jedis
- */
- public class JedisTest {
- JedisPool pool;
- Jedis jedis;
- public static void main(String[] args) {
- JedisTest jt = new JedisTest();
- jt.setUp();
- jt.testGet();
- }
- public void setUp() {
- pool = new JedisPool(new JedisPoolConfig(), "192.168.9.74");
- jedis = pool.getResource();
- // jedis.auth("password");
- }
- public void testGet(){
- System.out.println(jedis.get("yuwl"));
- }
- /**
- * Redis存储初级的字符串
- * CRUD
- */
- public void testBasicString(){
- //-----添加数据----------
- jedis.set("name","minxr");//向key-->name中放入了value-->minxr
- System.out.println(jedis.get("name"));//执行结果:minxr
- //-----修改数据-----------
- //1、在原来基础上修改
- jedis.append("name","jarorwar"); //很直观,类似map 将jarorwar append到已经有的value之后
- System.out.println(jedis.get("name"));//执行结果:minxrjarorwar
- //2、直接覆盖原来的数据
- jedis.set("name","闵晓荣");
- System.out.println(jedis.get("name"));//执行结果:闵晓荣
- //删除key对应的记录
- jedis.del("name");
- System.out.println(jedis.get("name"));//执行结果:null
- /**
- * mset相当于
- * jedis.set("name","minxr");
- * jedis.set("jarorwar","闵晓荣");
- */
- jedis.mset("name","minxr","jarorwar","闵晓荣");
- System.out.println(jedis.mget("name","jarorwar"));
- }
- /**
- * jedis操作Map
- */
- public void testMap(){
- Map<String,String> user=new HashMap<String,String>();
- user.put("name","minxr");
- user.put("pwd","password");
- jedis.hmset("user",user);
- //取出user中的name,执行结果:[minxr]-->注意结果是一个泛型的List
- //第一个参数是存入redis中map对象的key,后面跟的是放入map中的对象的key,后面的key可以跟多个,是可变参数
- List<String> rsmap = jedis.hmget("user", "name");
- System.out.println(rsmap);
- //删除map中的某个键值
- // jedis.hdel("user","pwd");
- System.out.println(jedis.hmget("user", "pwd")); //因为删除了,所以返回的是null
- System.out.println(jedis.hlen("user")); //返回key为user的键中存放的值的个数1
- System.out.println(jedis.exists("user"));//是否存在key为user的记录 返回true
- System.out.println(jedis.hkeys("user"));//返回map对象中的所有key [pwd, name]
- System.out.println(jedis.hvals("user"));//返回map对象中的所有value [minxr, password]
- Iterator<String> iter=jedis.hkeys("user").iterator();
- while (iter.hasNext()){
- String key = iter.next();
- System.out.println(key+":"+jedis.hmget("user",key));
- }
- }
- /**
- * jedis操作List
- */
- public void testList(){
- //开始前,先移除所有的内容
- jedis.del("java framework");
- System.out.println(jedis.lrange("java framework",0,-1));
- //先向key java framework中存放三条数据
- jedis.lpush("java framework","spring");
- jedis.lpush("java framework","struts");
- jedis.lpush("java framework","hibernate");
- //再取出所有数据jedis.lrange是按范围取出,
- // 第一个是key,第二个是起始位置,第三个是结束位置,jedis.llen获取长度 -1表示取得所有
- System.out.println(jedis.lrange("java framework",0,-1));
- }
- /**
- * jedis操作Set
- */
- public void testSet(){
- //添加
- jedis.sadd("sname","minxr");
- jedis.sadd("sname","jarorwar");
- jedis.sadd("sname","闵晓荣");
- jedis.sadd("sanme","noname");
- //移除noname
- jedis.srem("sname","noname");
- System.out.println(jedis.smembers("sname"));//获取所有加入的value
- System.out.println(jedis.sismember("sname", "minxr"));//判断 minxr 是否是sname集合的元素
- System.out.println(jedis.srandmember("sname"));
- System.out.println(jedis.scard("sname"));//返回集合的元素个数
- }
- public void test() throws InterruptedException {
- //keys中传入的可以用通配符
- System.out.println(jedis.keys("*")); //返回当前库中所有的key [sose, sanme, name, jarorwar, foo, sname, java framework, user, braand]
- System.out.println(jedis.keys("*name"));//返回的sname [sname, name]
- System.out.println(jedis.del("sanmdde"));//删除key为sanmdde的对象 删除成功返回1 删除失败(或者不存在)返回 0
- System.out.println(jedis.ttl("sname"));//返回给定key的有效时间,如果是-1则表示永远有效
- jedis.setex("timekey", 10, "min");//通过此方法,可以指定key的存活(有效时间) 时间为秒
- Thread.sleep(5000);//睡眠5秒后,剩余时间将为<=5
- System.out.println(jedis.ttl("timekey")); //输出结果为5
- jedis.setex("timekey", 1, "min"); //设为1后,下面再看剩余时间就是1了
- System.out.println(jedis.ttl("timekey")); //输出结果为1
- System.out.println(jedis.exists("key"));//检查key是否存在
- System.out.println(jedis.rename("timekey","time"));
- System.out.println(jedis.get("timekey"));//因为移除,返回为null
- System.out.println(jedis.get("time")); //因为将timekey 重命名为time 所以可以取得值 min
- //jedis 排序
- //注意,此处的rpush和lpush是List的操作。是一个双向链表(但从表现来看的)
- jedis.del("a");//先清除数据,再加入数据进行测试
- jedis.rpush("a", "1");
- jedis.lpush("a","6");
- jedis.lpush("a","3");
- jedis.lpush("a","9");
- System.out.println(jedis.lrange("a",0,-1));// [9, 3, 6, 1]
- System.out.println(jedis.sort("a")); //[1, 3, 6, 9] //输入排序后结果
- System.out.println(jedis.lrange("a",0,-1));
- }
- }
5.Redis会定时 保存数据到硬盘上,服务端窗口:
- [5856] 19 Apr 20:24:12.984 # Server started, Redis version 2.8.17
- [5856] 19 Apr 20:24:12.984 * DB loaded from disk: 0.000 seconds
- [5856] 19 Apr 20:24:12.984 * The server is now ready to accept connections on po
- rt 6379
- [5856] 19 Apr 21:47:49.294 * 1 changes in 900 seconds. Saving...
- [5856] 19 Apr 21:47:49.521 # fork operation complete
- [5856] 19 Apr 21:47:49.553 * Background saving terminated with success
6.参考资料:
http://blog.csdn.net/renfufei/article/details/38474435
http://my.oschina.net/lujianing/blog/204103
http://www.cnblogs.com/stephen-liu74/archive/2012/04/16/2370212.html
http://redis.cn/