♻️Refactor: LLM输出JSON可用性校验 增强系统安全性

Backend/src/main/java/com/wonder/bi/manager/ChartAgentManager.java

@@ -1,6 +1,7 @@
 package com.wonder.bi.manager;
 
 import com.wonder.bi.constant.CommonConstant;
+import com.wonder.bi.utils.JsonUtils;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.ai.chat.client.ChatClient;
 import org.springframework.stereotype.Component;
@@ -23,6 +24,7 @@ public class ChartAgentManager {
                 .call()
                 .content();
         log.info(content);
+        JsonUtils.isValidJson(content);
         return content;
     }
 }

Backend/src/main/java/com/wonder/bi/utils/JsonUtils.java

@@ -0,0 +1,21 @@
+package com.wonder.bi.utils;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.wonder.bi.common.ErrorCode;
+import com.wonder.bi.exception.BusinessException;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+public class JsonUtils {
+
+    public static boolean isValidJson(String input) {
+        ObjectMapper mapper = new ObjectMapper();
+        try {
+            mapper.readTree(input);
+            return true;
+        } catch (JsonProcessingException e) {
+            throw new BusinessException(ErrorCode.OPERATION_ERROR, "LLM JSON 输出错误，请重试");
+        }
+    }
+}

Backend/src/test/java/com/wonder/bi/utils/JsonUtilsTest.java

@@ -0,0 +1,15 @@
+package com.wonder.bi.utils;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class JsonUtilsTest {
+
+    @Test
+    void isValidJson() {
+        boolean validJson = JsonUtils.isValidJson("{\"name\": \"John\", \"age\": 30, \"isStudent\": false}");
+        assertTrue(validJson);
+    }
+}