RedisTemplate常用集合使用说明-boundHashOps(七)

       基础配置介绍已经在前面的《RedisTemplate常用集合使用说明(一)》中已经介绍了，现在我们直接介绍boundHashOps()方法的使用：

       首先要定义一个BoundHashOperations

BoundHashOperations<String, String, Object> boundHashOperations = redisTempla
4000
te.boundHashOps("li");

 1、put(HK key, HV value)

   新增元素到指定键中

boundHashOperations.put("ww","i");
boundHashOperations.put("w1","i1");
boundHashOperations.put("w2","i2");

 2、getKey()

  获取指定键中的值

//获取设置的绑定key值
System.out.println("获取设置的绑定key值:" + boundHashOperations.getKey());

 3、values()

  获取map中的值jdk要求1.8及以上

//获取map中的value值
boundHashOperations.values().forEach(v -> System.out.println("获取map中的value值" + v));

 4、entries()

     获取map中的键值对

//获取map键值对
boundHashOperations.entries().forEach((m,n) -> System.out.println("获取map键值对:" + m + "-" + n));

 5、get(Object member)

  获取map键中的值

//获取map键的值
System.out.println("获取map建的值:" + boundHashOperations.get("w1"));

6、keys()

  获取map的键

//获取map的键
boundHashOperations.keys().forEach(v -> System.out.println("获取map的键:" + v));

7、multiGet(Collection<HK> keys)

  根据map键批量获取map值

//根据map键批量获取map值
List list = new ArrayList<>(Arrays.asList("ww","w1"));
boundHashOperations.multiGet(list).forEach(v -> System.out.println("根据map键批量获取map值:" + v));

8、putAll(Map<? extends HK,? extends HV> m)

  批量添加键值对

//批量添加键值对
Map map = new HashMap<>();
map.put("m1","n1");
map.put("m2","n2");
boundHashOperations.putAll(map);
boundHashOperations.entries().forEach((m,n) -> System.out.println("批量添加键值对:" + m + "-" + n));

9、increment(HK key, long delta)

  自增长map键的值

//自增长map键的值
boundHashOperations.increment("c",1);
System.out.println("自增长map键的值:" + boundHashOperations.get("c"));

10、putIfAbsent(HK key, HV value)

  添加不存在的map键

//如果map键不存在，则新增，存在，则不变
boundHashOperations.putIfAbsent("m2","n2-1");
boundHashOperations.putIfAbsent("m3","n3");
boundHashOperations.entries().forEach((m,n) -> System.out.println("新增不存在的键值对:" + m + "-" + n));

 11、size()

   获取特定键对应的map大小

//查看绑定建的map大小
System.out.println("查看绑定建的map大小:" + boundHashOperations.size());

12、scan(ScanOptions options)

  扫描特定键所有值

//遍历绑定键获取所有值
Cursor<Map.Entry<String, Object>> cursor = boundHashOperations.scan(ScanOptions.NONE);
while (cursor.hasNext()){
Map.Entry<String, Object> entry = cursor.next();
System.out.println("遍历绑定键获取所有值:" + entry.getKey() + "---" + entry.getValue());
}

13、delete(Object... keys)

  批量删除map值

long delSize = boundHashOperations.delete("m3","m2");
System.out.println("删除的键的个数:" + delSize);
boundHashOperations.entries().forEach((m,n) -> System.out.println("删除后剩余map键值对:" + m + "-" + n));