fix(接口自动化): 修复json-schema勾选必填后切回json报错 #1005335

--bug=1005335 --user=赵勇 【github#4790】json-... https://www.tapd.cn/55049933/s/1028239

backend/src/main/java/io/metersphere/commons/json/JSONSchemaGenerator.java

@@ -312,14 +312,8 @@ public class JSONSchemaGenerator {
 
     private static final SyntaxValidator VALIDATOR = new SyntaxValidator(ValidationConfiguration.byDefault());
 
-    public static String getJson(String jsonSchema) {
-        if (StringUtils.isEmpty(jsonSchema)) {
-            return null;
-        }
+    private static String formerJson(String jsonSchema) {
         try {
-            JsonNode jsonNode = JsonLoader.fromString(jsonSchema);
-            ProcessingReport report = VALIDATOR.validateSchema(jsonNode);
-            if (report.isSuccess()) {
             JSONObject root = new JSONObject();
             generator(jsonSchema, root);
             // 格式化返回
@@ -328,12 +322,30 @@ public class JSONSchemaGenerator {
                 return gson.toJson(root.get("MS-OBJECT"));
             }
             return gson.toJson(root);
+        } catch (Exception e) {
+            return jsonSchema;
+        }
+    }
+
+    public static String getJson(String jsonSchema) {
+        if (StringUtils.isEmpty(jsonSchema)) {
+            return null;
+        }
+        try {
+            JsonNode jsonNode = JsonLoader.fromString(jsonSchema);
+            ProcessingReport report = VALIDATOR.validateSchema(jsonNode);
+            if (report.isSuccess()) {
+                return formerJson(jsonSchema);
             } else {
                 return report.getExceptionThreshold().toString();
             }
         } catch (Exception ex) {
             ex.printStackTrace();
-            return ex.getMessage();
+            try {
+                return formerJson(jsonSchema);
+            } catch (Exception e) {
+                return jsonSchema;
+            }
         }
     }
 }