bug fix ,get params can be null

src/main/java/com/common/toolbox/app_utils/RequestHandler.java

@@ -198,9 +198,10 @@ public class RequestHandler {
             if (url.split("\\?").length > 1) {
                 String paramsGET = url.split("\\?")[1];
                 for (String param : paramsGET.split("&")) {
-                    if (param.split("=").length > 1) {
-                        String key = param.split("=")[0];
-                        String value = param.split("=")[1];
+                    String values[] = param.split("=");
+                    if (values.length > 0) {
+                        String key = values[0];
+                        String value = values.length > 1 ? values[1] : "";
                         this.params.put(key, value);
                     }
                 }