[Improvement-3471][common] JSONUtils.toMap It is not necessary to check whether the JSON method is empty again. #3471 (#3481)

* JSONUtils.toMap call improvement.

dolphinscheduler-alert/src/main/java/org/apache/dolphinscheduler/alert/utils/EnterpriseWeChatUtils.java

@@ -104,11 +104,7 @@ public class EnterpriseWeChatUtils {
             }
 
             Map<String, String> map = JSONUtils.toMap(resp);
-            if (map != null) {
-                return map.get("access_token");
-            } else {
-                return null;
-            }
+            return map == null ? null : map.get("access_token");
         } finally {
             httpClient.close();
         }

dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/DataSourceService.java

@@ -539,9 +539,9 @@ public class DataSourceService extends BaseService {
                 (type == DbType.HIVE || type == DbType.SPARK)) {
             parameterMap.put(Constants.PRINCIPAL, principal);
         }
-        if (other != null && !"".equals(other)) {
+
         Map<String, String> map = JSONUtils.toMap(other);
-            if (map.size() > 0) {
+        if (map != null) {
             StringBuilder otherSb = new StringBuilder();
             for (Map.Entry<String, String> entry: map.entrySet()) {
                 otherSb.append(String.format("%s=%s%s", entry.getKey(), entry.getValue(), separator));
@@ -552,8 +552,6 @@ public class DataSourceService extends BaseService {
             parameterMap.put(Constants.OTHER, otherSb);
         }
 
-        }
-
         if (logger.isDebugEnabled()) {
             logger.info("parameters map:{}", JSONUtils.toJsonString(parameterMap));
         }