添加缓存查看

src/main/java/com/yunhai/bschclassmanage/controller/api/CacheController.java

@@ -0,0 +1,99 @@
+package com.yunhai.bschclassmanage.controller.api;
+
+import com.yunhai.bschclassmanage.config.Config;
+import com.yunhai.bschclassmanage.controller.BaseController;
+import com.yunhai.bschclassmanage.utils.RedisUtil;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * 缓存查看接口
+ */
+@Slf4j
+@RestController
+@RequestMapping(Config.API_PATH + "/cache/")
+@CrossOrigin(originPatterns = {"*"}, allowCredentials = "true")
+public class CacheController extends BaseController {
+
+    @Autowired
+    private RedisTemplate redisTemplate;
+
+    @Autowired
+    private RedisUtil redisUtil;
+
+    /**
+     * 根据 key 查看缓存内容
+     * 返回 key 是否存在、数据类型、剩余过期时间(秒)以及对应的值
+     * 支持 string / hash / list / set / zset 五种类型
+     *
+     * @param key 缓存 key
+     */
+    @GetMapping("get")
+    public Map<String, Object> getByKey(@RequestParam String key) {
+        Map<String, Object> result = new HashMap<>();
+        result.put("key", key);
+
+        if (StringUtils.isBlank(key)) {
+            result.put("exists", false);
+            result.put("msg", "key不能为空");
+            return result;
+        }
+
+        Boolean exists = redisTemplate.hasKey(key);
+        if (exists == null || !exists) {
+            result.put("exists", false);
+            result.put("msg", "缓存不存在或已过期");
+            return result;
+        }
+
+        result.put("exists", true);
+        String type = redisTemplate.type(key).name().toLowerCase();
+        result.put("type", type);
+        result.put("expire", redisTemplate.getExpire(key, TimeUnit.SECONDS)); // -1 永不过期，-2 不存在
+
+        Object value;
+        switch (type) {
+            case "string":
+                value = redisTemplate.opsForValue().get(key);
+                break;
+            case "hash":
+                value = redisTemplate.opsForHash().entries(key);
+                break;
+            case "list":
+                value = redisTemplate.opsForList().range(key, 0, -1);
+                break;
+            case "set":
+                value = redisTemplate.opsForSet().members(key);
+                break;
+            case "zset":
+                value = redisTemplate.opsForZSet().rangeWithScores(key, 0, -1);
+                break;
+            default:
+                value = null;
+                break;
+        }
+        result.put("value", value);
+        return result;
+    }
+
+    /**
+     * 根据模式匹配查询 key 列表（如 school_class_*），方便先找到 key 再查看内容
+     *
+     * @param pattern 匹配模式，默认 * 表示所有 key
+     */
+    @GetMapping("keys")
+    public Object keys(@RequestParam(required = false, defaultValue = "*") String pattern) {
+        return redisUtil.keys(pattern);
+    }
+}