feat: 知识图谱测试api

backend/handlers/search_handler.go

@@ -0,0 +1,33 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"knowledge-graph-backend/services"
+)
+
+type SearchHandler struct {
+	dataService *services.DataService
+}
+
+func NewSearchHandler(dataService *services.DataService) *SearchHandler {
+	return &SearchHandler{
+		dataService: dataService,
+	}
+}
+
+func (h *SearchHandler) SearchNodes(c *gin.Context) {
+	query := c.Query("q")
+	if query == "" {
+		c.JSON(http.StatusBadRequest, gin.H{
+			"error":   "Bad Request",
+			"message": "Query parameter 'q' is required",
+		})
+		return
+	}
+
+	results := h.dataService.SearchNodes(query)
+
+	c.JSON(http.StatusOK, results)
+}