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NoSQL学习:Redis的java方式调用案例指南

1- redis Java 调用方式

本章介绍通过使用Java方式调用Jedis API,从而来操作Redis进行增删改查操作。

说明:关于Redis的安装和开发环境搭建,详见前面章节。

1. Key操作

代码:

package com.redis.tutorial ;

import redis.clients.jedis.Jedis;
 
public class KeyAPI {
 
 private  static  Jedis redis;
 
 static {
 redis = new Jedis("192.168.32.20", 6379);
 }
 
 public static void main(String[] args) {
 System.out .println("==============key===============");
 // 清空数据
 System.out .println("清空库中所有数据:" + redis.flushDB());
 ;
 System.out .println("判断key111是否存在" + redis. exists ("key111"));
 System.out .println("增加key111:" + redis.set("key111", "hello world"));
 System.out .println("输出key111:" + redis.get("key111"));
 System.out .println("增加新的key112:" + redis.set("key112", "key112value"));
 System.out .println("增加新的key113:" + redis.set("key113", "key113value"));
 // 输出所有key的的值 无序的
 for (String key : redis.keys("*")) {
 System.out .println(key + ":" + redis.get(key));
 }
 System.out .println("删除key111:" + redis.del("key111"));
 System.out .println("key111是否存在:" + redis.exists("key111"));
 // 设置key的过期时间
 System.out .println("设置key112的过期时间3秒" + redis.expire("key112", 3));
 try {
 Thread.sleep(2000L);
 } catch (InterruptedException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 System.out .println("key112的剩余生存时间:" + redis.ttl("key112"));
 System.out .println("key112的取消过期时间:" + redis.persist("key112"));
 System.out .println("查看key112是否还存在:" + redis.exists("key112"));
 System.out .println("查看key112的value类型:" + redis.type("key112"));
 System.out .println("给key113改成key114:" + redis.rename("key113", "key114"));
 System.out .println("查看key114value:" + redis.get("key114"));
 
 redis.close();
 }
}
 

执行结果

==============key================

清空库中所有数据:OK

判断key111是否存在false

增加key111:OK

输出key111:hello world

增加新的key112:OK

增加新的key113:OK

key113:key113value

key112:key112value

key111:hello world

删除key111:1

key111是否存在:false

设置key112的过期时间3秒1

key112的剩余生存时间:1

key112的取消过期时间:1

查看key112是否还存在:true

查看key112的value类型:string

给key113改成key114:OK

查看key114value:key113value

2. String操作

示例代码:

package com.redis.tutorial ;
 
import redis.clients.jedis.Jedis;
 
public class StringAPI {
 
 private static Jedis redis;
 
 static {
 redis = new Jedis("192.168.32.20", 6379);
 }
 
 public static void main(String[] args) {
 System.out .println("========string===========");
 System.out .println("清空数据:"+redis.flushDB());
 System.out .println("=========单个增删改=========");
 System.out .println("增加key001:"+redis.set("key001", "key001value"));
 System.out .println("修改key001:"+redis.set("key001", "key-update")+" "+redis.get("key001"));
 System.out .println("最后追加 字符串 :"+redis.append("key001", "-append")+" "+redis.get("key001"));
 System.out .println("删除key001:"+redis.del("key001"));
 
 System.out .println("=========多个一起添加,删除=======");
 System.out .println("增减key021,key022,key023:"
+redis.mset("key021","key021value","key022",
"key022value","key023","key023value"));
 System.out .println("一次获取多个key值:"+redis.mget("key021","key022","key023"));
 System.out .println("一次删除多个key:"+redis.del(new String[]{"key021","key022"}));
 System.out .println("获取key021:"+redis.get("key021"));
 
 System.out .println("===========other=========");
 System.out .println("不在在key时再添加值:"+redis.setnx("key031", "key031value"));
 System.out .println("不在在key时再添加值:"+redis.setnx("key032", "key032value"));
 System.out .println("存在在key时再添加值:"+redis.setnx("key032", "key032value_tow"));
 System.out .println("key031:"+redis.get("key031"));
 System.out .println("key032值没变:"+redis.get("key032"));
 
 System.out .println("添加key033并设置过期时间:"+redis.setex("key033", 2, "key033value"));
 try {
 Thread.sleep(3000L);
 } catch (InterruptedException e) {
 // TODO Auto-generated catch block
 e.printStackTrace();
 }
 System.out .println("获取key033值:"+redis.get("key033"));
 System.out .println("获取值得子串key032:"+redis.getrange("key032",1, 5));
 
 redis.close();
 }
 
}
 

执行结果:

==============string============

清空数据:OK

============单个增删改=============

增加key001:OK

修改key001:OK key-update

最后追加字符串:17 key-update-append

删除key001:1

============多个一起添加,删除==========

增减key021,key022,key023:OK

一次获取多个key值:[key021value,

key022value, key023value]

一次删除多个key:2

获取key021:null

===========other=======================

不在在key时再添加值:1

不在在key时再添加值:1

存在在key时再添加值:0

key031:key031value

key032值没变:key032value

添加key033并设置过期时间:OK

获取key033值:null

获取值得子串key032:ey032

3. List操作

示例操作代码:

package com.redis.tutorial;
 
import redis.clients.jedis.Jedis;
import redis.clients.jedis.SortingParams;
 
public class ListAPI {
 
 private static Jedis redis;
 
 static {
 redis = new Jedis("192.168.32.20", 6379);
 }
 
 public static void main(String[] args) {
 //list存储结构是栈类型的 最后插入的索引是0
 System.out .println("==============list==============");
 System.out .println("清空数据:"+redis.flushDB());
 System.out .println("===========增加=============");
 System.out .println("添加了字符串list");
 System.out .println("listString:"+redis.lpush("listString", "vector"));
 System.out .println("listString:"+redis.lpush("listString", "vector"));
 System.out .println("listString:"+redis.lpush("listString", "arraylist"));
 System.out .println("listString:"+redis.lpush("listString", " hashmap "));
 System.out .println("listNumber:"+redis.lpush("listNumber", "1"));
 System.out .println("listNumber:"+redis.lpush("listNumber", "4"));
 System.out .println("listNumber:"+redis.lpush("listNumber", "3"));
 System.out .println("listNumber:"+redis.lpush("listNumber", "2"));
 System.out .println("listString全部元素:"+redis.lrange("listString", 0, -1));
 System.out .println("listNumber全部元素:"+redis.lrange("listNumber", 0, -1));
 System.out .println("");
 System.out .println("============修改=================");
 System.out .println("对指定下标进行修改:"+redis.lset("listString", -1, "vector-update"));
 System.out .println("修改后的0下标值:"+redis.lindex("listString", 0));
 System.out .println("删除后的元素:"+redis.lrange("listString", 0, -1));
 System.out .println("");
 System.out .println("==============删除================");
 System.out .println("删除指定的元素,重复的删除后添加的:"+redis.lrem("listString", 1, "vector"));
 System.out .println("删除后的元素:"+redis.lrange("listString", 0, -1));
 System.out .println("");
 /*
 * list中存字符串时必须指定参数为alpha,如果不使用SortingParams,而是直接使用sort("list"),
 * 会出现"ERR One or more scores can't be converted into double"
 */
 SortingParams sortingParameters = new SortingParams();
 sortingParameters.alpha();//目测是根据字母顺序排序
 System.out .println("排序元素:"+redis.sort("listString",sortingParameters));
 System.out .println("排序元素:"+redis.sort("listNumber"));
 
 redis.close();
 }
 
}
 

执行结果:

====================list============

清空数据:OK

===========增加=================

添加了字符串list

listString:1

listString:2

listString:3

listString:4

listNumber:1

listNumber:2

listNumber:3

listNumber:4

listString全部元素:[hashmap, arraylist, vector, vector]

listNumber全部元素:[2, 3, 4, 1]

============修改=================

对指定下标进行修改:OK

修改后的0下标值:hashmap

删除后的元素:[hashmap, arraylist, vector, vector-update]

==============删除================

删除指定的元素,重复的删除后添加的:1

删除后的元素:[hashmap, arraylist, vector-update]

排序元素:[arraylist, hashmap, vector-update]

排序元素:[1, 2, 3, 4]

4. Set操作

示例操作代码:

package com.redis.tutorial;
 
import redis.clients.jedis.Jedis;
 
public class SetAPI {
 private static Jedis redis;
 
 static {
 redis = new Jedis("192.168.32.20", 6379);
 }
 
 public static void main(String[] args) {
 System.out .println("=========set============");
 System.out .println("清空数据:"+redis.flushDB());
 System.out .println("============增加==============");
 System.out .println("名为sets的集合中添加元素value1"+redis.sadd("sets", "value1"));
 System.out .println("名为sets的集合中添加元素value2"+redis.sadd("sets", "value2"));
 System.out .println("名为sets的集合中添加元素value3"+redis.sadd("sets", "value3"));
 System.out .println("sets所有值:"+redis.smembers("sets"));
 System.out .println("===============修改=============");
 System.out .println("无法修改指定的值但是,不能存入相同的值:"+redis.sadd("sets", "value2"));
 System.out .println("sets:"+redis.smembers("sets"));
 System.out .println("============查询==================");
 for(String value : redis.smembers("sets")){
 System.out .println(value);
 }
 System.out .println("判断元素是否在集合中:"+redis.sismember("sets", "value2"));
 System.out .println("==============删除=============");
 System.out .println("删除指定的值:"+redis.srem("sets", "value2"));
 System.out .println("元素出栈:"+redis.spop("sets"));
 System.out .println("sets:"+redis.smembers("sets"));
 System.out .println("");
 System.out .println("==============集合运算============");
 System.out .println("名为sets1的集合中添加元素value1"+redis.sadd("sets1", "value1"));
 System.out .println("名为sets1的集合中添加元素value2"+redis.sadd("sets1", "value2"));
 System.out .println("名为sets1的集合中添加元素value3"+redis.sadd("sets1", "value3"));
 System.out .println("名为sets2的集合中添加元素value3"+redis.sadd("sets2", "value3"));
 System.out .println("名为sets2的集合中添加元素value4"+redis.sadd("sets2", "value4"));
 System.out .println("名为sets2的集合中添加元素value5"+redis.sadd("sets2", "value5"));
 System.out .println("sets1所有值:"+redis.smembers("sets1"));
 System.out .println("sets2所有值:"+redis.smembers("sets2"));
 System.out .println("sets1和sets2的交集:"+redis.sinter("sets1","sets2"));
 System.out .println("sets1和sets2的并集:"+redis.sunion("sets1","sets2"));
 System.out .println("sets1和sets2的差集:"+redis.sdiff("sets1","sets2"));
 
 redis.close();
 
 }
 
}
 

执行结果:

============set============

清空数据:OK

============增加==============

名为sets的集合中添加元素value11

名为sets的集合中添加元素value21

名为sets的集合中添加元素value31

sets所有值:[value1, value3, value2]

===============修改=============

无法修改指定的值但是,不能存入相同的值:0

sets:[value1, value3, value2]

============查询==================

value1

value3

value2

判断元素是否在集合中:true

==============删除=============

删除指定的值:1

元素出栈:value3

sets:[value1]

==============集合运算===========

名为sets1的集合中添加元素value11

名为sets1的集合中添加元素value21

名为sets1的集合中添加元素value31

名为sets2的集合中添加元素value31

名为sets2的集合中添加元素value41

名为sets2的集合中添加元素value51

sets1所有值:[value1, value3, value2]

sets2所有值:[value4, value3, value5]

sets1和sets2的交集:[value3]

sets1和sets2的并集:[value4,

value3, value2, value1, value5]

sets1和sets2的差集:[value2, value1]

5. Hash操作

示例操作代码:

package com.redis.tutorial;
 
import redis.clients.jedis.Jedis;
 
public class HashAPI {
 private static Jedis redis;
 
 static {
 redis = new Jedis("192.168.32.20", 6379);
 }
 
 public static void main(String[] args) {
 System.out .println("============hash==========");
 System.out .println("清空数据:"+redis.flushDB());
 System.out .println("===========增加========");
 System.out .println("hashs添加key001=>value001"+redis.hset("hashs", "key001", "value001"));
 System.out .println("hashs添加key002=>value002"+redis.hset("hashs", "key002", "value002"));
 System.out .println("hashs添加key003=>value003"+redis.hset("hashs", "key003", "value003"));
 System.out .println("hashs添加key004=>4L"+redis.hincrBy("hashs", "key004", 4L));
 System.out .println("hashs:"+redis.hgetAll("hashs"));
 System.out .println("=============查询===========");
 System.out .println("判断是否存在key001:"+redis.hexists("hashs", "key001"));
 System.out .println("查找key001的值:"+redis.hget("hashs", "key001"));
 System.out .println("获得所有集合的key:"+redis.hkeys("hashs"));
 System.out .println("获得所有集合的value:"+redis.hvals("hashs"));
 
 System.out .println("=============修改=============");
 System.out .println("修改key001值为value001_update:"+redis.hset("hashs", "key001", "value001_update"));
 System.out .println("修改key004值增加11:"+redis.hincrBy("hashs", "key004", 11L));
 System.out .println("hashs:"+redis.hvals("hashs"));
 
 System.out .println("=============删除===========");
 System.out .println("删除key002:"+redis.hdel("hashs", "key002"));
 System.out .println("hashs:"+redis.hgetAll("hashs"));
 
 redis.close();
 
 }
 
}
 

执行结果:

================hash=================

清空数据:OK

==================增加================

hashs添加key001=>value0011

hashs添加key002=>value0021

hashs添加key003=>value0031

hashs添加key004=>4L4

hashs:{key004=4, key003=value003,

key002=value002, key001=value001}

===================查询================

判断是否存在key001:true

查找key001的值:value001

获得所有集合的key:[key004, key003, key002, key001]

获得所有集合的value:[value001, value002, value003, 4]

=============修改==========

修改key001值为value001_update:0

修改key004值增加11:15

hashs:[value001_update, value002, value003, 15]

=============删除=======================

删除key002:1

hashs:{key004=15, key003=value003, key001=value001_update}

6. SortSet操作

示例操作代码:

package com.redis.tutorial;
 
import redis.clients.jedis.Jedis;
 
public class SortedSetAPI {
 
 private static Jedis redis;
 
 static {
 redis = new Jedis("192.168.32.20", 6379);
 }
 
 public static void main(String[] args) {
 //有序集合类似
 System.out .println("=========SortedSet======");
 System.out .println("清空数据:"+redis.flushDB());
 System.out .println("==============增加===============");
 System.out .println("名为zsets添加数据value1:"+redis.zadd("zsets",1, "value1"));
 System.out .println("名为zsets添加数据value2:"+redis.zadd("zsets",2, "value2"));
 System.out .println("名为zsets添加数据value3:"+redis.zadd("zsets",3, "value3"));
 System.out .println("名为zsets添加数据value4:"+redis.zadd("zsets",4, "value4"));
 System.out .println("名为zsets添加数据value4:"+redis.zadd("zsets",4, "value4"));
 System.out .println("zsets:"+redis.zrange("zsets", 0, -1));
 
 System.out .println("===============查询===============");
 System.out .println("查找元素的个数:"+redis.zcard("zsets"));
 System.out .println("查找权重范围内元素的个数:"+redis.zcount("zsets",1,3));
 System.out .println("查找元素value4的权重:"+redis.zscore("zsets","value4"));
 
 System.out .println("=============修改===================");
 
 System.out .println("=============删除===================");
 System.out .println("删除value4:"+redis.zrem("zsets", "value4"));
 System.out .println("redis:"+redis.zrange("zsets", 0, -1));
 
 redis.close();
 }
 
}
 

执行结果:

============SortedSet========

清空数据:OK

==============增加===============

名为zsets添加数据value1:1

名为zsets添加数据value2:1

名为zsets添加数据value3:1

名为zsets添加数据value4:1

名为zsets添加数据value4:0

zsets:[value1, value2, value3, value4]

===============查询===============

查找元素的个数:4

查找权重范围内元素的个数:3

查找元素value4的权重:4.0

=============修改===================

=============删除===================

删除value4:1

redis:[value1, value2, value3]


文章来源:智云一二三科技

文章标题:NoSQL学习:Redis的java方式调用案例指南

文章地址:https://www.zhihuclub.com/198296.shtml

关于作者: 智云科技

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