feat: 知识图谱测试api

backend/handlers/graph_handler.go

@@ -0,0 +1,34 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"knowledge-graph-backend/services"
+)
+
+type GraphHandler struct {
+	dataService *services.DataService
+}
+
+func NewGraphHandler(dataService *services.DataService) *GraphHandler {
+	return &GraphHandler{
+		dataService: dataService,
+	}
+}
+
+func (h *GraphHandler) GetGraphData(c *gin.Context) {
+	data := h.dataService.GetGraphData()
+	c.JSON(http.StatusOK, data)
+}
+
+func (h *GraphHandler) GetStats(c *gin.Context) {
+	stats := h.dataService.GetStats()
+	c.JSON(http.StatusOK, gin.H{
+		"stats": stats,
+		"timestamp": gin.H{
+			"totalNodes": stats["totalNodes"],
+			"totalEdges": stats["totalEdges"],
+		},
+	})
+}