• [Redis] Spring Boot 使用Redis---StringRedisTemplate

    ✨✨个人主页:沫洺的主页

    📚📚系列专栏: 📖 JavaWeb专栏📖 JavaSE专栏 📖 Java基础专栏📖vue3专栏 

                               📖MyBatis专栏📖Spring专栏📖SpringMVC专栏📖SpringBoot专栏

                               📖Docker专栏📖Reids专栏📖MQ专栏📖SpringCloud专栏     

    💖💖如果文章对你有所帮助请留下三连✨✨

    ✨Redis结构体

    Redis 有 5 种基础数据结构: 

    string (字符串) 、 list (列表) 、 hash (字典) 、 set (集合) 和 zset (有序集合) 

    🎊Spring Boot 使用Redis

    概念补充:

    Redis缓存穿透,缓存击穿,缓存雪崩

    • 穿透: 不存在
    • 击穿：一个热点的key失效了，这时大量的并发请求直接到达数据库.
    • 雪崩：大量key同时失效

     Redis常用配置参数

    1. # Redis服务器地址
    2. spring.redis.host=192.168.0.104
    3. # Redis数据库索引（默认为0）
    4. spring.redis.database=0 
    5. # Redis服务器连接端口
    6. spring.redis.port=6380
    7. # Redis服务器连接密码（默认为空）
    8. #spring.redis.password=
    9. # 连接池最大连接数（使用负值表示没有限制） 默认 8
    10. spring.redis.lettuce.pool.max-active=8
    11. # 连接池最大阻塞等待时间（使用负值表示没有限制） 默认 -1
    12. spring.redis.lettuce.pool.max-wait=-1
    13. # 连接池中的最大空闲连接 默认 8
    14. spring.redis.lettuce.pool.max-idle=5
    15. # 连接池中的最小空闲连接 默认 0
    16. spring.redis.lettuce.pool.min-idle=5
    17. ## 连接超时时间（毫秒）
    18. spring.redis.timeout=30000

    🎉String(字符串)

    1. @SpringBootTest
    2. class AppTests_String {
    3.  
    4.     @Autowired
    5.     private StringRedisTemplate stringRedisTemplate;
    6.  
    7.     private final String key = "A";
    8.     @Test
    9.     public void test1() {
    10.         //设KEY为A,value为100,30秒过期
    11.         stringRedisTemplate.opsForValue().set(key, "100", 30, TimeUnit.SECONDS);
    12.         //获取A的值
    13.         String value = stringRedisTemplate.opsForValue().get(key);
    14.         System.out.println(value);
    15.         //拼接
    16.         stringRedisTemplate.opsForValue().set("B","aaa");
    17.         stringRedisTemplate.opsForValue().append("B", "--bbb");
    18.         System.out.println(stringRedisTemplate.opsForValue().get("B"));
    19.         //获取后删除
    20.         String b = stringRedisTemplate.opsForValue().getAndDelete("B");
    21.         System.out.println(b);
    22.         //加指定值,默认1
    23.         Long c = stringRedisTemplate.opsForValue().increment("C");
    24.         System.out.println(c);
    25.         Long c1 = stringRedisTemplate.opsForValue().increment("C", 9);
    26.         System.out.println(c1);
    27.         //setnx锁
    28.         Boolean d1 = stringRedisTemplate.opsForValue().setIfAbsent("D", "1");
    29.         System.out.println(d1);
    30.         Boolean d2 = stringRedisTemplate.opsForValue().setIfAbsent("D", "1");
    31.         System.out.println(d2);
    32.         //设置声明周期
    33.         String d3 = stringRedisTemplate.opsForValue().getAndExpire("D", 60, TimeUnit.SECONDS);
    34.         System.out.println(d1);
    35.         //批量设置
    36.         Map map = new HashMap<>();
    37.         map.put("F1","1");
    38.         map.put("F2","2");
    39.         map.put("F3","3");
    40.         stringRedisTemplate.opsForValue().multiSet(map);
    41.         //批量获取
    42.         List keys = new ArrayList<>();
    43.         keys.add("F1");
    44.         keys.add("F2");
    45.         keys.add("F3");
    46.         List values = stringRedisTemplate.opsForValue().multiGet(keys);
    47.         System.out.println(values);
    48.     }
    49. }

    🎉List(列表)

    1. @SpringBootTest
    2. class AppTests_List {
    3.  
    4.     @Autowired
    5.     private StringRedisTemplate stringRedisTemplate;
    6.     private static final String name = "wangwu";
    7.  
    8.     @Test
    9.     void test1() {
    10.         //左推
    11.         stringRedisTemplate.opsForList().leftPush(name, "aaa");
    12.         //批量左推
    13.         Long aLong = stringRedisTemplate.opsForList().leftPushAll(name, "aaa", "bbb", "ccc");
    14.         System.out.println(aLong);
    15.  
    16.         //左弹
    17.         String v = stringRedisTemplate.opsForList().leftPop(name);
    18.         System.out.println(v);
    19.         //右弹,限时30秒后结束监听
    20.         String v1 = stringRedisTemplate.opsForList().rightPop(name, 30, TimeUnit.MINUTES);
    21.         System.out.println("--------------v1------------");
    22.         System.out.println(v1);
    23.         
    24.         //一直监听,有值就弹出
    25.         //while (true) {
    26.         //    String v2 = stringRedisTemplate.opsForList().rightPop(name, 10, TimeUnit.SECONDS);
    27.         //    if (v2 != null) {
    28.         //        System.out.println("------------获取到数据------------");
    29.         //        System.out.println(v2);
    30.         //    } else {
    31.         //        System.out.println("-----------没有拉取到新数据，继续监听----------");
    32.         //    }
    33.         //}
    34.         
    35.         //长度
    36.         Long size = stringRedisTemplate.opsForList().size(name);
    37.         System.out.println(size);
    38.     }
    39. }

    🎉Set(集合)

    1. @SpringBootTest
    2. class AppTests_Set {
    3.  
    4.     @Autowired
    5.     private StringRedisTemplate stringRedisTemplate;
    6.  
    7.     private static final String name1 = "zhangsan";
    8.     private static final String name2 = "lisi";
    9.  
    10.     @Test
    11.     void test1() {
    12.         //添加
    13.         stringRedisTemplate.opsForSet().add(name1, "张三", "李四", "王五");
    14.         stringRedisTemplate.opsForSet().add(name2, "张三丰", "李四", "王五");
    15.         //交集
    16.         Set intersect = stringRedisTemplate.opsForSet().intersect(name1, name2);
    17.         //stringRedisTemplate.opsForSet().intersectAndStore()
    18.         System.out.println(intersect);
    19.         //并集
    20.         Set union = stringRedisTemplate.opsForSet().union(name1, name2);
    21.         //stringRedisTemplate.opsForSet().unionAndStore()
    22.         System.out.println(union);
    23.         //差集
    24.         Set difference = stringRedisTemplate.opsForSet().difference(name1, name2);
    25.         //stringRedisTemplate.opsForSet().differenceAndStore()
    26.         System.out.println(difference);
    27.         //是否存在
    28.         Boolean a = stringRedisTemplate.opsForSet().isMember(name1, "张三");
    29.         Boolean b = stringRedisTemplate.opsForSet().isMember(name1, "张三丰");
    30.         System.out.println(a);
    31.         System.out.println(b);
    32.  
    33.  
    34.     }
    35. }

    🎉ZSet(有序集合)

    1. @SpringBootTest
    2. class AppTests_Zset {
    3.  
    4.     @Autowired
    5.     private StringRedisTemplate stringRedisTemplate;
    6.  
    7.     private static final String name1 = "zhangsan";
    8.  
    9.     @Test
    10.     void test1() {
    11.         stringRedisTemplate.opsForZSet().add(name1, "语文", 110);
    12.         stringRedisTemplate.opsForZSet().add(name1, "数学", 130);
    13.         stringRedisTemplate.opsForZSet().add(name1, "英语", 90);
    14.         //数量
    15.         Long size = stringRedisTemplate.opsForZSet().size(name1);
    16.         System.out.println(size);
    17.         //范围数量
    18.         Long count = stringRedisTemplate.opsForZSet().count(name1, 100, 150);
    19.         System.out.println(count);
    20.         //弹出最值
    21.         //ZSetOperations.TypedTuple max = stringRedisTemplate.opsForZSet().popMax(name1);
    22.         //ZSetOperations.TypedTuple min = stringRedisTemplate.opsForZSet().popMin(name1);
    23.         //System.out.println(max+"---"+min);
    24.  
    25.         //范围内的值,根据分数升序
    26.         Set strings = stringRedisTemplate.opsForZSet().rangeByScore(name1, 0, 150);
    27.         System.out.println(strings);
    28.         //排名
    29.         Long rank = stringRedisTemplate.opsForZSet().rank(name1, "数学");
    30.         System.out.println(rank);
    31.         //倒叙
    32.         Set strings1 = stringRedisTemplate.opsForZSet().reverseRangeByScore(name1, 0, 150);
    33.         System.out.println(strings1);
    34.  
    35.     }
    36. }

    🎉Hash(字典)

    1. @SpringBootTest
    2. class AppTests_Hash {
    3.  
    4.     @Autowired
    5.     private StringRedisTemplate stringRedisTemplate;
    6.  
    7.     private static final String name = "zhangsan";
    8.     private static final String name2 = "lisi";
    9.  
    10.     @Test
    11.     void test1() {
    12.         //放
    13.         stringRedisTemplate.opsForHash().put(name, "20221107", "洛阳");
    14.         stringRedisTemplate.opsForHash().put(name, "20221108", "新乡");
    15.         stringRedisTemplate.opsForHash().put(name, "20221109", "郑州");
    16.         //取
    17.         Object o = stringRedisTemplate.opsForHash().get(name, "20221108");
    18.         System.out.println(o);
    19.  
    20.         //所有value
    21.         List values = stringRedisTemplate.opsForHash().values(name);
    22.         System.out.println(values);
    23.         //所有hashKey
    24.         Set keys = stringRedisTemplate.opsForHash().keys(name);
    25.         System.out.println(keys);
    26.         //所有hashKey和value
    27.         Map entries = stringRedisTemplate.opsForHash().entries(name);
    28.         System.out.println(entries);
    29.         //是否存在指定hashKey
    30.         Boolean b = stringRedisTemplate.opsForHash().hasKey(name, "20221108-");
    31.         System.out.println(b);
    32.         // stringRedisTemplate.opsForHash().put(name,"20221109","开封");
    33.         //如果没有.则放
    34.         Boolean b1 = stringRedisTemplate.opsForHash().putIfAbsent(name, "20221110", "南阳");
    35.         System.out.println(b1);
    36.         //删除
    37.         // stringRedisTemplate.opsForHash().delete(name,"20221110");
    38.         //批量获取
    39.         List objects = stringRedisTemplate.opsForHash().multiGet(name, CollUtil.newArrayList("20221107", "20221109"));
    40.         System.out.println(objects);
    41.         //批量放
    42.         Map map = new HashMap<>();
    43.         map.put("20221107", "驻马店");
    44.         map.put("20221108", "信阳");
    45.         map.put("20221109", "平顶山");
    46.         stringRedisTemplate.opsForHash().putAll(name2, map);
    47.         //加减
    48.         Long qty = stringRedisTemplate.opsForHash().increment("cateory.1", "product.108", 5);
    49.         //Long qty = stringRedisTemplate.opsForHash().increment("cateory.1", "product.108", 100);
    50.         //Long qty = stringRedisTemplate.opsForHash().increment("cateory.1", "product.108", -8);
    51.         System.out.println(qty);
    52.         //随机获取
    53.         List keys = stringRedisTemplate.opsForHash().randomKeys(name2, 2);
    54.         System.out.println(keys);
    55.     }
    56. }
      57.  
 

      🎉BitMap(String)
       

       
 
      1. @SpringBootTest
      2. class AppTests_BitMap {
      3.  
      4.     @Autowired
      5.     private StringRedisTemplate stringRedisTemplate;
      6.  
      7.     private final String name1 = "张三";
      8.  
      9.     @Test
      10.     public void test1() {
      11.         stringRedisTemplate.opsForValue().setBit(name1, 1, true);
      12.         stringRedisTemplate.opsForValue().setBit(name1, 100, true);
      13.         stringRedisTemplate.opsForValue().setBit(name1, 365, true);
      14.  
      15.         Boolean bit = stringRedisTemplate.opsForValue().getBit(name1, 1);
      16.         Boolean bit1 = stringRedisTemplate.opsForValue().getBit(name1, 2);
      17.         System.out.println(bit + "---" + bit1);
      18.         //原生统计范围内1/true的个数
      19.         RedisCallback callback = (connection) ->
      20.                 connection.bitCount(name1.getBytes(StandardCharsets.UTF_8), 0, 366);
      21.         Long aLong = stringRedisTemplate.execute(callback);
      22.         System.out.println(aLong);
      23.  
      24.         //stringRedisTemplate.opsForValue().getOperations().execute(callback);
      25.     }
      26. }
       

       

      
                
                    
                

                
    57. 

                    相关阅读:
      
                    
python 断点续传下载                            
      
java计算机毕业设计航帆学院网站MyBatis+系统+LW文档+源码+调试部署                            
      
Flutter 开发者工具 Android Studio 开发Flutter应用                            
      
功率放大器和电压放大器的区别是什么意思                            
      
Spring Cloud【SkyWalking日志、SkyWalking告警 、Skywalking自定义告警规则】(十五)                            
      
Windows（二）：windows+nginx+openssl本地搭建nginx并配置ssl实现https访问                            
      
java计算机毕业设计高校人事管理系统源码+数据库+系统+lw文档+部署                            
      
【FastCAE源码阅读7】视图方向切换按钮实现原理                            
      
外卖项目07---git                            
      
C++ 性能优化指南 KurtGuntheroth 第6章 优化动态分配内存的变量 摘录                            
      
                          
                
      58. 
                
    58. 
                    原文地址：https://blog.csdn.net/HeyVIrBbox/article/details/127788759
                
      59.