refactor(llm): 优化应用创建和更新逻辑，增加系统提示和知识库支持

- 在创建和更新应用时，增加了对系统提示的非空校验和空值处理
- 在获取应用信息时，增加了对 prompt、modelServiceId 和 promptId 的非空赋值
- 在会话创建和聊天请求中，增加了对知识库 ID 和系统提示的处理逻辑- 优化了日志输出，增加了对系统提示更新的记录

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/application/ApplicationServiceImpl.java

@@ -22,6 +22,7 @@ import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
 import com.baomidou.mybatisplus.core.toolkit.CollectionUtils;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.context.annotation.Lazy;
 import org.springframework.stereotype.Service;
 import org.springframework.validation.annotation.Validated;
@@ -69,6 +70,7 @@ public class ApplicationServiceImpl implements ApplicationService {
     @Override
     public Long createApplication (ApplicationSaveReqVO createReqVO) {
 
+        // 获取名称并且校验是否重复
         String appName = createReqVO.getAppName();
         LambdaQueryWrapper<ApplicationDO> queryWrapper = new LambdaQueryWrapperX<>();
         queryWrapper.eq(ApplicationDO::getAppName, appName);
@@ -76,13 +78,16 @@ public class ApplicationServiceImpl implements ApplicationService {
         if (applicationDOS.size() > 0) {
             throw exception(APPLICATION_NAME_NOT_EXISTS);
         }
+
         // 插入
         ApplicationDO application = BeanUtils.toBean(createReqVO, ApplicationDO.class);
         String apikey = getApikey();
         application.setApiKey(apikey);
         String replace = llmBackendProperties.getApplicationApi().replace("apiKey", apikey);
         application.setApiUrl(replace);
-        application.setPrompt(createReqVO.getSystemPrompt());
+        if (!StringUtils.isBlank(createReqVO.getSystemPrompt())){
+            application.setPrompt(createReqVO.getSystemPrompt());
+        }
         applicationMapper.insert(application);
 
         //prompt使用量+1
@@ -122,7 +127,9 @@ public class ApplicationServiceImpl implements ApplicationService {
         validateApplicationExists(updateReqVO.getId());
         // 更新
         ApplicationDO updateObj = BeanUtils.toBean(updateReqVO, ApplicationDO.class);
-        updateObj.setPrompt(updateReqVO.getSystemPrompt());
+        if (!StringUtils.isBlank(updateReqVO.getSystemPrompt())){
+            updateObj.setPrompt(updateReqVO.getSystemPrompt());
+        }
         applicationMapper.updateById(updateObj);
     }
 
@@ -215,7 +222,18 @@ public class ApplicationServiceImpl implements ApplicationService {
 
             }
         }
-        bean.setSystemPrompt(applicationDO.getPrompt());
+        if (applicationDO.getPrompt() != null) {
+            bean.setSystemPrompt(applicationDO.getPrompt());
+            bean.setPrompt(applicationDO.getPrompt());
+        }
+
+        if (applicationDO.getModelServiceId() != null) {
+            bean.setModelServiceId(applicationDO.getModelServiceId());
+        }
+
+        if (applicationDO.getPromptId() != null) {
+            bean.setPromptId(applicationDO.getPromptId());
+        }
         return bean;
     }
 

yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/conversation/ConversationServiceImpl.java

@@ -98,6 +98,7 @@ public class ConversationServiceImpl implements ConversationService {
      */
     private final static String KNOWLEDGE_DOCUMENTS_REDIS_KEY = "llm:knowledge:documents";
     private final static Long KNOWLEDGE_DOCUMENTS_REDIS_EXPIRE_SECONDS = 60 * 60 * 24L;
+    public static final String PROMPT = "Use the following context as your learned knowledge, inside <context></context> XML tags.When answer to user:\\n- If you don't know, just say that you don't know.\\n- If you don't know when you are not sure, ask for clarification.\\nAvoid mentioning that you obtained the information from the context.\\nAnd answer according to the language of the user's question.\\n\\n";
 
     @Override
     public Integer createConversation (ConversationSaveReqVO createReqVO) {
@@ -313,7 +314,21 @@ public class ConversationServiceImpl implements ConversationService {
                     ApplicationSaveReqVO applicationSaveReqVO = BeanUtil.toBean(application, ApplicationSaveReqVO.class);
                     applicationService.updateApplication(applicationSaveReqVO);
                 }
-                chatReqVO.setSystemPrompt(application.getPrompt());
+
+
+                // 知识库ID
+                if (application.getModelServiceId()!= null){
+                    chatReqVO.setKnowledge(application.getModelServiceId());
+                }
+
+                if (!org.apache.commons.lang3.StringUtils.isBlank(application.getPrompt())){
+                    chatReqVO.setSystemPrompt(application.getPrompt());
+                    if (chatReqVO.getSystemPrompt() == null || chatReqVO.getSystemPrompt().isEmpty()) {
+                        log.info("应用中未找到系统提示信息，使用默认提示信息");
+                        chatReqVO.setSystemPrompt(PROMPT);
+                    }
+                }
+
                 log.info("已更新系统提示信息为: {}", chatReqVO.getSystemPrompt());
             }
         }
@@ -372,7 +387,6 @@ public class ConversationServiceImpl implements ConversationService {
                && Objects.equals(expectedGroupId, actualGroupId);
     }
 
-    public static final String PROMPT = "Use the following context as your learned knowledge, inside <context></context> XML tags.When answer to user:\\n- If you don't know, just say that you don't know.\\n- If you don't know when you are not sure, ask for clarification.\\nAvoid mentioning that you obtained the information from the context.\\nAnd answer according to the language of the user's question.\\n\\n";
 
     /**
      * 公共模型聊天流式处理方法