第二，Rdeis Jedis

摘要:一八数据类型、二、三、四集群和一概述是官方推荐的连接开发工具。使您能够操作中间件。

一. Redis II的八种数据类型。Rdeis Jedis三世。雷迪斯生菜四。Redis集群一、Jedis概述Jedis是Redis官方推荐的Java连接开发工具。启用Java运行Redis中间件。

二、Jedis例1。Ping公共类测试ping { public static void main(string[]args){//创建连接jedis jedis = new jedis ("127.0.0.1 "，6379)；System.out.printf("测试连接:%s "，jedis.ping())。println()；//关闭连接jedis . Close()；}} 2.password公共类测试密码{ public static void main(string[]args){//创建连接jedis jedis = new jedis ("127.0.0.1 "，6379)；//未设置密码，跳过//system . out . printf(" Verify Password:% s "，jedis.auth ("123456 "))。println()；//connect jedis . connect()；//Disconnect jedis . Disconnect()；//清除所有keyjedis。flush alls()；//关闭连接jedis . Close()；}} 3.key公共类测试key { public static void main(string[]args){//创建连接jedis jedis = new jedis ("127.0.0.1 "，6379)；system . out . println(" empty data:"+jedis . flush db())；System.out.println("判断用户名键是否存在:"+jedis . exists(" username "))；System.out.println("新添加的键值对:"+jedis.set("username "，" QS "))；System.out.println("新增的键值对:"+jedis.set("password "，" 123 "))；System.out.print("系统中所有键如下:")；set keys = jedis . keys(" * ")；system . out . println(keys)；System.out.println("删除密钥密码:"+jedis.del("密码"))；System.out.println("判断密钥密码是否存在:"+jedis . exists(" password "))；System.out.println("查看key username保存的值的类型:"+jedis . type(" username "))；System.out.println("随机返回密钥空间key中的一个密钥:"+jedis . random key())；system . out . println(" rename key:"+jedis . rename(" username "，" name "))；System.out.println("拿出修改过的名字:"+jedis . get(" name "))；System.out.println("按索引查询:"+jedis . select(0))；System.out.println("删除当前选中的数据库键中的所有键:"+jedis . flush db())；System.out.println("返回当前数据库中的键数:"+jedis . dbsize())；System.out.println("删除所有数据库中的所有键key:"+jedis . flush all())；//关闭连接jedis . Close()；}} 4.string公共类测试string { public static void main(string[]args){//创建连接jedis jedis = new jedis ("127.0.0.1 "，6379)；jedis . flush db()；系统。out.println ("= = = = = = = =添加数据= = = = = = ")；system . out . println(jedis . set(" key 1 "，" value 1 "))；system . out . println(jedis . set(" key 2 "，" value 2 "))；system . out . println(jedis . set(" key 3 "，" value 3 "))；System.out.println("修改key 1:"+jedis.set ("key 1 "，" value 1 changed "))；System.out.println("获取key1的值:"+jedis . get(" key 1 "))；system . out . println(" delete key 2:"+jedis . del(" key 2 "))；system . out . println(" get key 2:"+jedis . get(" key 2 "))；System.out.println("添加key3后的值:"+jedis.append("key3 "，" End "))；System.out.println("获取key3的值:"+jedis . Get(" key 3 "))；System.out.println("添加多个键值对:"+jedis.mset ("key01 "，" value01 "，" key02 "，" value02 "，" key03 "，" value 03 "))；System.out.println("获取多个键值对:"+jedis.mget ("key01 "，" key02 "，" key 03 "))；System.out.println("获取多个键值对:"+jedis.mget ("key01 "、" key02 "、" key03 "、" key 04 "))；System.out.println("删除多个键值对:"+jedis.del("key01 "，" key 02 "))；System.out.println("获取多个键值对:"+jedis.mget ("key01 "，" key02 "，" key 03 "))；jedis . flush db()；系统。out . println(" = = = = = = = = = = =添加一个键-值对以防止覆盖原始值= = = = = = = = ")；system . out . println(jedis . setnx(" key 1 "，" value 1 "))；system . out . println(jedis . setnx(" key 2 "，" value 2 "))；system . out . println(jedis . setnx(" key 2 "，" value 2-new "))；system . out . println(jedis . get(" key 1 "))；system . out . println(jedis . get(" key 2 "))；系统。out.println ("= = = = = = = =添加一个键值对并设置有效时间= = = = = = = ")；system . out . println(jedis . setex(" key 3 "，2，" value 3 "))；system . out . println(jedis . get(" key 3 "))；试试{ TimeUnit。seconds . sleep③；} catch(interrupted exception e){ e . printstacktrace()；} system . out . println(jedis . get(" key 3 "))；系统。out.println ("= = = = = = = =获取原始值并更新为新值= = = = = = ")；system . out . println(jedis . getset(" key 2 "，" key 2 getset "))；system . out . println(jedis . get(" key 2 "))；System.out.println("获取key2的值的字符串:"+jedis.getrange("key2 "，2，4))；//关闭连接jedis . Close()；}} 5.List公共类测试列表{ public static void main(string[]args){//创建连接jedis jedis = new jedis ("127.0.0.1 "，6379)；jedis . flush db()；系统。out.println ("= = = = = = = = =添加列表= = = = = = ")；jedis.lpush("collections "、" ArrayList "、" Vector "、" Stack "、" HashMap "、" WeakHashMap "、" linked HashMap ")；jedis.lpush("collections "，" HashSet ")；jedis.lpush("collections "，" TreeSet ")；jedis.lpush("collections "，" TreeMap ")；// -1表示倒数第二个元素，-2表示倒数第二个元素，-1结束表示查询所有系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；系统。out.println("集合区间0-3的元素:"+jedis.lrange("集合"，0，3))；system . out . println(" = = = = = = = = = = = = = = = = = = = = = = = = = = ")；//删除列表中指定的值。第二个参数是要删除的数(如果有重复的话)，先删除增加的值，类似于System.out.println("删除指定元素的个数:"+jedis。lrem ("collections "，2，" hashmap "))；系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；System.out.println("删除下标0-3区间外的元素:"+jedis.ltrim("collections "，0，3))；系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；系统。out . println(" Collections list off the stack(左端):"+jedis . lpop(" Collections "))；系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；系统。out . println(" collections add elements，从列表右端开始，对应lpush:"+jedis . rpush(" collections "，" enum map "))；系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；系统。out . println(" Collections list off the stack(右端):"+jedis . rpop(" Collections "))；系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；System.out.println("修改集合指定的下标1的内容:"+jedis。lset ("Collections "，1，" Linked ArrayList ")；系统。out.println("集合的内容:"+jedis.l range ("collections "，0，-1))；system . out . println(" = = = = = = = = = = = = = = = = = = = = = = = = = = ")；系统。out.println("集合长度:"+jedis.llen("集合"))；System.out.println("获取集合下标为2的元素:"+jedis.lindex("collections "，2))；system . out . println(" = = = = = = = = = = = = = = = = = = = = = = = = = = ")；jedis.lpush("sortedList "，" 3 "，" 6 "，" 2 "，" 0 "，" 7 "，" 4 ")；System.out.println("排序前排序列表:"+jedis.l range("排序列表"，0，-1))；system . out . println(jedis . sort(" sorted list "))；system . out . println(" sorted list:"+jedis . l range(" sorted list "，0，-1))；//关闭连接jedis . Close()；}} 6.set public class testset { public static void main(string[]args){//Create connection jedis jedis = new jedis(" 127 . 0 . 0 . 1 "，6379)；jedis . flush db()；系统。out . println(" = = = = = = = = =向集合中添加一个元素(不重复)= = = = = = = = = "；system . out . println(jedis . sadd(" eleSet "、" e1 "、" e2 "、" e4 "、" e3 "、" e0 "、" e8 "、" e7 "、" E5 "))；system . out . println(jedis . sadd(" eleSet "，" E6 "))；system . out . println(jedis . sadd(" eleSet "，" E6 "))；系统。out . println(" eleSet "的所有元素都是:"+jedis . s members(" eleSet "))；System.out.println(&