类型传入255，也作为删除该字段

common/src/main/java/com/xypower/common/JSONUtils.java

@@ -218,6 +218,7 @@ public class JSONUtils {
         int arrayIndex = 0;
         boolean isArray = false;
         String fieldName = null;
+        boolean removeNode = val == null || fieldType == 255;
 
         JSONObject node = jsonObject;
         int i = 0;
@@ -235,7 +236,7 @@ public class JSONUtils {
                     fieldName = fields[i].substring(0, pos);
                     arrayIndex = Integer.parseInt(fields[i].substring(pos + 1, pos2 - pos - 1));
 
-                    if (!node.has(fieldName) && val == null) {
+                    if (!node.has(fieldName) && removeNode) {
                         return true;
                     }
                     JSONArray jsonArray = node.optJSONArray(fieldName);
@@ -250,7 +251,7 @@ public class JSONUtils {
                     node = jsonArray.optJSONObject(arrayIndex);
                 } else {
                     if (!node.has(fields[i])) {
-                        if (val == null)
+                        if (removeNode)
                             return true;
                         else {
                             node.put(fields[i], new JSONObject());
@@ -261,10 +262,10 @@ public class JSONUtils {
             }
 
             if (node == null) {
-                return (val == null);
+                return removeNode;
             }
 
-            if (val == null) {
+            if (removeNode) {
                 node.remove(fields[i]);
             } else {
                 node.put(fields[i], val);