updates

src/main/java/com/example/zxweb/utils/RestUtil.java

@@ -9,6 +9,7 @@ import org.springframework.http.converter.StringHttpMessageConverter;
 import org.springframework.web.client.RestTemplate;
 
 import java.nio.charset.StandardCharsets;
+import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
@@ -268,16 +269,18 @@ public class RestUtil {
         }
         System.out.println("》》》》》》》》》》》》》》》》》》》》");
         List<String> stringList = responseBodyHeaders.get("Set-Cookie");
-        StringBuilder sb=new StringBuilder();
-        for (String s : stringList) {
-            if (s.contains("JSESSIONID") &&!s.contains("deleteMe")) {
-                sb.append(s);
+        if (stringList!=null) {
+            StringBuilder sb=new StringBuilder();
+            for (String s : stringList) {
+                if (s.contains("JSESSIONID") &&!s.contains("deleteMe")) {
+                    sb.append(s);
+                }
+            }
+            if (StringUtils.isNotBlank(sb.toString())) {
+                CacheManager.put("Cookie",sb.toString());
             }
         }
-        if (StringUtils.isNotBlank(sb.toString())) {
-            CacheManager.put("Cookie",sb.toString());
-        }
-        return RT.exchange(url, method, request, responseType);
+        return exchange;
     }
 
     /**