1)使用StringTemplateRedis操作String类型

1)判断redis中是否拥有key所对应的值，如果有返回true，没有那么直接返回false

redisTemplate.hasKey(key);

2)如果redis中有key那么直接取出key所对应的值

redisTemplate.opsForValue().get(key)

3)删除单个key值

redisTemplate.delete(key)

4)批量删除key值

redisTemplate.delete(keys)，这里面的keys是Collections<K> keys类型

5)将当前传入的key值序列化为byte[]类型 redisTemplate.dump(key)

6)设置过期时间

redisTemplate.expire(key, timeout, unit)

redisTemplate.expireAt(key, date);

@Controller
public class DemoRedis {
    @Autowired
    private StringRedisTemplate template;
    @RequestMapping("/Java100")
    @ResponseBody
    public String start(){
        template.opsForValue().set("name","zhangsan");
        template.expire("name",20, TimeUnit.SECONDS);
        return template.opsForValue().get("name");
    }
}

7)查找匹配的key值，返回一个Set集合类型

redisTemplate.keys(pattern)//patten可以传递一个*

/**
 * 根据前缀获取所有的key
 * 例如：pro_*
 */
public Set<String> getListKey(String prefix) {
    Set<String> keys = redisTemplate.keys(prefix.concat("*"));
    return keys;
}

@Controller
public class DemoRedis {
    @Autowired
    private StringRedisTemplate template;
    @RequestMapping("/Java100")
    @ResponseBody
    public String start(String pattern1,String pattern2){
        template.opsForValue().set("userID","1");
        template.opsForValue().set("username","zhangsna");
        template.opsForValue().set("userdata","12503487");
        StringBuilder builder=new StringBuilder();
        Set<String> set1=template.keys(pattern1);
        for(String key:set1){
            builder.append(key);
        }
        builder.append("\n");
        //前缀进行获取
        Set<String> set2=template.keys(pattern2.concat("*"));
        for(String key:set2){
            builder.append(key);
        }
        builder.append("\n");
        //批量获取value
        List<String> value1= template.opsForValue().multiGet(set1);
        value1.stream().forEach((String key)->{
            builder.append(value1);
        });
        return builder.toString();
    }

}

8) 批量获取value

/**
 * 获取所有的key
 */
public List<String> getListKey(String prefix) {
    Set<String> keys = redisTemplate.keys("*");
    List<String> values = redisTemplate.opsForValue().multiGet(keys);
    return values;
}

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