fix(接口定义): 历史JDBC数据兼容处理

backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsJDBCSampler.java

@@ -96,7 +96,7 @@ public class MsJDBCSampler extends MsTestElement {
 
     private Arguments arguments(String name, List<KeyValue> variables) {
         Arguments arguments = new Arguments();
-        if (!variables.isEmpty()) {
+        if (CollectionUtils.isNotEmpty(variables)) {
             arguments.setEnabled(true);
             arguments.setName(name);
             arguments.setProperty(TestElement.TEST_CLASS, Arguments.class.getName());

frontend/src/business/components/api/definition/components/ApiConfig.vue

@@ -127,6 +127,9 @@
           this.request = createComponent("JDBCSampler");
           this.currentApi.request = this.request;
         }
+        if (!this.currentApi.request.variables) {
+          this.currentApi.request.variables = [];
+        }
       },
       initDubbo() {
         if (!this.setRequest()) {