调用dify，解决时间问题，源语料为空的问题

src/test/java/com/rj/controller/DifyWorkflowControllerTest.java

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+package com.rj.controller;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.rj.dto.DifyWorkflowRequestDto;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureWebMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.MediaType;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.*;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.*;
+
+/**
+ * Dify工作流控制器测试类
+ * 
+ * @author 李中华
+ * @date 2025/1/3
+ */
+@SpringBootTest
+@AutoConfigureWebMvc
+@ActiveProfiles("test")
+public class DifyWorkflowControllerTest {
+
+    @Autowired
+    private WebApplicationContext webApplicationContext;
+
+    private MockMvc mockMvc;
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    public void setup() {
+        mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
+    }
+
+    @Test
+    public void testGetWorkflowConfig() throws Exception {
+        setup();
+        
+        mockMvc.perform(get("/api/dify/workflow/config")
+                .contentType(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.message").value("工作流配置信息"))
+                .andExpect(jsonPath("$.workflowName").value("企微对话分析工作流"));
+    }
+
+    @Test
+    public void testTestWithPresetData() throws Exception {
+        setup();
+        
+        mockMvc.perform(post("/api/dify/workflow/consulting-scenario/test")
+                .contentType(MediaType.APPLICATION_JSON))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.success").exists());
+    }
+
+    @Test
+    public void testConsultingScenarioWorkflowWithParameters() throws Exception {
+        setup();
+
+        // 读取真实的聊天内容
+        ClassLoader classLoader = getClass().getClassLoader();
+        java.io.InputStream inputStream = classLoader.getResourceAsStream("corpus/qiwei/qw1.txt");
+        java.util.Scanner scanner = new java.util.Scanner(inputStream, "UTF-8").useDelimiter("\\A");
+        String chatContent = scanner.hasNext() ? scanner.next() : "";
+        scanner.close();
+
+        // 生成随机值
+        String unionId = "test_union_" + java.util.UUID.randomUUID().toString().replace("-", "").substring(0, 8);
+        String consultantId = "consultant_" + java.util.UUID.randomUUID().toString().replace("-", "").substring(0, 8);
+        String communicateDate = generateRandomDateTime();
+        String analysisScene = "sales_consultation";
+        String aiAnalysisRequestId = "ai_req_" + java.util.UUID.randomUUID().toString().replace("-", "").substring(0, 12);
+        int version = new java.util.Random().nextInt(10) + 1; // 1-10之间的随机版本号
+
+        // 创建测试请求DTO
+        DifyWorkflowRequestDto requestDto = new DifyWorkflowRequestDto();
+        requestDto.setUnionId(unionId);
+        requestDto.setConsultantId(consultantId);
+        requestDto.setCommunicateDate(communicateDate);
+        requestDto.setAnalysisScene(analysisScene);
+        requestDto.setAiAnalysisRequestId(aiAnalysisRequestId);
+        requestDto.setVersion(version);
+        requestDto.setChat(chatContent);
+
+        mockMvc.perform(post("/api/dify/workflow/consulting-scenario")
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(objectMapper.writeValueAsString(requestDto)))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.success").exists());
+    }
+
+    /**
+     * 生成随机日期时间字符串
+     * @return 随机日期时间字符串，格式为 "yyyy-MM-dd HH:mm:ss"
+     */
+    private String generateRandomDateTime() {
+        java.util.Random random = new java.util.Random();
+        int year = 2020 + random.nextInt(6); // 2020-2025年
+        int month = 1 + random.nextInt(12);  // 1-12月
+        int day = 1 + random.nextInt(28);    // 1-28日（避免月份天数问题）
+        int hour = random.nextInt(24);       // 0-23小时
+        int minute = random.nextInt(60);     // 0-59分钟
+        int second = random.nextInt(60);     // 0-59秒
+
+        return String.format("%04d-%02d-%02d %02d:%02d:%02d", year, month, day, hour, minute, second);
+    }
+}