首次提交：初始化项目代码

json/json_demo_4.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+)
+
+// Product 大数据模型
+type Product struct {
+	SKU   string  `json:"sku"`
+	Price float64 `json:"price"`
+}
+
+func main() {
+	// 流式写入
+	file, _ := os.Create("json/bulma_products.json")
+	defer file.Close()
+	enc := json.NewEncoder(file)
+	for i := 1; i <= 5000; i++ {
+		_ = enc.Encode(Product{
+			SKU:   fmt.Sprintf("BULMA%05d", i),
+			Price: 99.9,
+		})
+	}
+	fmt.Println("\n流式写入完成")
+
+	// 流式读取
+	rf, _ := os.Open("json/bulma_products.json")
+	defer rf.Close()
+	dec := json.NewDecoder(rf)
+	count := 0
+	for dec.More() {
+		var p Product
+		_ = dec.Decode(&p)
+		count++
+	}
+	fmt.Printf("流式解析完成，总数：%d\n", count)
+}