Redis工具的使用和实例展现

*************************************Redis工具*********************************
/**
 * Redis工具类
 */
@Component
public class RedisUtils {
   @Autowired
   private RedisTemplate redisTemplate;
   @Resource(name = "redisTemplate")
   private ValueOperations<String, String> valueOperations;
   @Resource(name = "redisTemplate")
   private HashOperations<String, String, Object> hashOperations;
   @Resource(name = "redisTemplate")
   private ListOperations<String, Object> listOperations;
   @Resource(name = "redisTemplate")
   private SetOperations<String, Object> setOperations;
   @Resource(name = "redisTemplate")
   private ZSetOperations<String, Object> zSetOperations;
   /** 默认过时时长，单位：秒 */
   public final static long DEFAULT_EXPIRE = 60 * 60 * 24;
   /** 不设置过时时长 */
   public final static long NOT_EXPIRE = -1;

   public void set(String key, Object value, long expire) {
      valueOperations.set(key, toJson(value));
      if (expire != NOT_EXPIRE) {
         redisTemplate.expire(key, expire, TimeUnit.SECONDS);
      }
   }

   public void set(String key, Object value) {
      set(key, value, DEFAULT_EXPIRE);
   }

   public <T> T get(String key, Class<T> clazz, long expire) {
      String value = valueOperations.get(key);
      if (expire != NOT_EXPIRE) {
         redisTemplate.expire(key, expire, TimeUnit.SECONDS);
      }
      return value == null ? null : fromJson(value, clazz);
   }

   public <T> T get(String key, Class<T> clazz) {
      return get(key, clazz, NOT_EXPIRE);
   }

   public String get(String key, long expire) {
      String value = valueOperations.get(key);
      if (expire != NOT_EXPIRE) {
         redisTemplate.expire(key, expire, TimeUnit.SECONDS);
      }
      return value;
   }

   public String get(String key) {
      return get(key, NOT_EXPIRE);
   }

   public void delete(String key) {
      redisTemplate.delete(key);
   }

   /**
    * Object转成JSON数据
    */
   private String toJson(Object object) {
      if (object instanceof Integer || object instanceof Long || object instanceof Float || object instanceof Double || object instanceof Boolean || object instanceof String) {
         return String.valueOf(object);
      }
      return JSON.toJSONString(object);
   }

   /**
    * JSON数据，转成Object
    */
   private <T> T fromJson(String json, Class<T> clazz) {
      return JSON.parseObject(json, clazz);
   }
}
**************************************实例部分************************************************

@RunWith(SpringRunner.class)@SpringBootTestpublic class RedisTest {    @Autowired    private RedisUtils redisUtils;    @Test    public void contextLoads() {        //生成一个对象        SysUserEntity user = new SysUserEntity();        user.setEmail("123456@qq.com");        redisUtils.set("user", user);//把对象存到redis中        redisUtils.set("zhangsan","123");//将一个字符串存到redis中        //获得redis中的对象        System.out.println(ToStringBuilder.reflectionToString(redisUtils.get("user", SysUserEntity.class)));       Date s= redisUtils.get("user",SysUserEntity.class).getCreateTime();//获取对象属性        System.out.println("s:"+s);        Map paramap=new HashMap();//存map集合        paramap.put("userName","lc");        paramap.put("password","1234");        redisUtils.set("map",paramap);  Map pp=redisUtils.get("map",Map.class);//获取map集合 System.out.println("password"+pp.get("password"));//获取map集合中存入的数据    System.out.println(redisUtils.get("map"));        System.out.println(redisUtils.get("zhangsan"));//从redis中获取zhangsan对象        redisUtils.delete("zhangsan");//从redis中删除一个对象        System.out.println(redisUtils.get("zhangsan"));        redisUtils.set("lisi","1234",5);//向redis中设置一个字符串，而且设置过时时间为5秒中        System.out.println(redisUtils.get("lisi"));        try {            Thread.sleep(5000);        } catch (InterruptedException e) {            e.printStackTrace();        }        System.out.println(redisUtils.get("lisi"));    }