关于RedisTemplate之opsForValue的使用说明

redisTemplate.opsForValue().set("stringValue","bbb");  

String stringValue = redisTemplate.opsForValue().get("key")

redisTemplate.opsForValue().append("key", "appendValue");
String stringValueAppend = redisTemplate.opsForValue().get("key");
System.out.println("通过append(K key, String value)方法修改后的字符串:" stringValueAppend); 

String cutString = redisTemplate.opsForValue().get("key", 0, 3);  
System.out.println("通过get(K key, long start, long end)方法获取截取的字符串:" cutString);  

String oldAndNewStringValue = redisTemplate.opsForValue().getAndSet("key", "ccc");  
System.out.print("通过getAndSet(K key, V value)方法获取原来的值："   oldAndNewStringValue );  
String newStringValue = redisTemplate.opsForValue().get("key");  
System.out.println("修改过后的值:" newStringValue);  

redisTemplate.opsForValue().setBit("key",1,false);  
newStringValue = redisTemplate.opsForValue().get("key") "";  
System.out.println("通过setBit(K key,long offset,boolean value)方法修改过后的值:" newStringValue);  

boolean bitBoolean = redisTemplate.opsForValue().getBit("key",1);  
System.out.println("通过getBit(K key,long offset)方法判断指定bit位的值是:"   bitBoolean);  

Long stringValueLength = redisTemplate.opsForValue().size("key");  
System.out.println("通过size(K key)方法获取字符串的长度:" stringValueLength);  

double stringValueDouble = redisTemplate.opsForValue().increment("doubleKey",5);   
System.out.println("通过increment(K key, double delta)方法以增量方式存储double值:"   stringValueDouble); 

double stringValueLong = redisTemplate.opsForValue().increment("longKey",6);   
System.out.println("通过increment(K key, long delta)方法以增量方式存储long值:"   stringValueLong); 

boolean absentBoolean = redisTemplate.opsForValue().setIfAbsent("absentKey","fff");  
System.out.println("通过setIfAbsent(K key, V value)方法判断变量值absentValue是否存在:"   absentBoolean);  
if(absentBoolean){  
    String absentValue = redisTemplate.opsForValue().get("absentKey") "";  
    System.out.print(",不存在，则新增后的值是:" absentValue);  
    boolean existBoolean = redisTemplate.opsForValue().setIfAbsent("absentKey","eee");  
    System.out.print(",再次调用setIfAbsent(K key, V value)判断absentValue是否存在并重新赋值:"   existBoolean);  
    if(!existBoolean){  
        absentValue = redisTemplate.opsForValue().get("absentKey") "";  
        System.out.print("如果存在,则重新赋值后的absentValue变量的值是:"   absentValue);  

redisTemplate.opsForValue().set("timeOutKey", "timeOut", 5, TimeUnit.SECONDS);  
String timeOutValue = redisTemplate.opsForValue().get("timeOutKey") "";  
System.out.println("通过set(K key, V value, long timeout, TimeUnit unit)方法设置过期时间，过期之前获取的数据:" timeOutValue);  
Thread.sleep(5*1000);  
timeOutValue = redisTemplate.opsForValue().get("timeOutKey") "";  
System.out.print(",等待10s过后，获取的值:" timeOutValue);  

redisTemplate.opsForValue().set("absentKey","dd",1);  
String overrideString = redisTemplate.opsForValue().get("absentKey");  
System.out.println("通过set(K key, V value, long offset)方法覆盖部分的值:" overrideString);

Map valueMap = new HashMap();  
valueMap.put("valueMap1","map1");  
valueMap.put("valueMap2","map2");  
valueMap.put("valueMap3","map3");  
redisTemplate.opsForValue().multiSet(valueMap);  

//根据List集合取出对应的value值  
List paraList = new ArrayList();  
paraList.add("valueMap1");  
paraList.add("valueMap2");  
paraList.add("valueMap3");  
List<String> valueList = redisTemplate.opsForValue().multiGet(paraList);  
for (String value : valueList){  
    System.out.println("通过multiGet(Collection<K> keys)方法获取map值:"   value);  
}

Map valueMap = new HashMap();  
valueMap.put("valueMap1","map1");  
valueMap.put("valueMap2","map2");  
valueMap.put("valueMap3","map3");  
redisTemplate.opsForValue().multiSetIfAbsent(valueMap); 

 //新增一个字符串类型的值,key是键，value是值
set(K key, V value)
redisTemplate.opsForValue().set("stringValue","bbb");
//获取key键对应的值
get(Object key)
redisTemplate.opsForValue().get("stringValue");
//在原有的值基础上新增字符串到末尾
append(K key, String value)
redisTemplate.opsForValue().append("stringValue","aaa");
//截取key键对应值得字符串，从开始下标位置开始到结束下标的位置(包含结束下标)的字符串
get(K key, long start, long end)
redisTemplate.opsForValue().get("stringValue",0,3);
//获取原来key键对应的值并重新赋新值
getAndSet(K key, V value)
String oldValue = redisTemplate.opsForValue().getAndSet("stringValue","ccc");
//key键对应的值value对应的ascll码,在offset的位置(从左向右数)变为ascll码的value
setBit(K key, long offset, boolean value)
redisTemplate.opsForValue().setBit("stringValue",1,false);
//判断指定的位置ASCII码的bit位是否为1
getBit(K key, long offset)
boolean bitBoolean = redisTemplate.opsForValue().getBit("stringValue",1);
//获取指定字符串的长度
size(K key)
Long stringValueLength = redisTemplate.opsForValue().size("stringValue");
//以增量的方式将long值存储在变量中
increment(K key, long delta)
double stringValueLong = redisTemplate.opsForValue().increment("longValue",6);
//如果键不存在则新增,存在则不改变已经有的值
setIfAbsent(K key, V value)
boolean absentBoolean = redisTemplate.opsForValue().setIfAbsent("absentValue","fff");
//设置变量值的过期时间
set(K key, V value, long timeout, TimeUnit unit)
redisTemplate.opsForValue().set("timeOutValue","timeOut",5,TimeUnit.SECONDS);
//覆盖从指定位置开始的值
set(K key, V value, long offset)
redisTemplate.opsForValue().set("absentValue","dd",1);
//设置map集合到redis
multiSet(Map<? extends K,? extends V> map)
Map valueMap = new HashMap(){{//匿名内部内
        put("valueMap1","map1");
        put("valueMap2","map2");
        put("valueMap3","map3");
}};
redisTemplate.opsForValue().multiSet(valueMap);