go知识重新整理

Go/gopkg/encoding/csv.go

@@ -0,0 +1,36 @@
+// Comma-Separated Values
+// 逗号分割值文件
+package main
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+	"strings"
+)
+
+func main() {
+
+	// 单行读取
+	r := strings.NewReader("a,b,c")
+	csvR := csv.NewReader(r)
+	records, _ := csvR.Read()
+	fmt.Println(records) // [a b c]
+
+	// 全部读取
+	f, _ := os.Open("demo.csv")
+	csvR = csv.NewReader(f)
+	fmt.Println(csvR.ReadAll()) // [[...]]
+
+	// 单行写入
+	w := csv.NewWriter(os.Stdout)
+	_ = w.Write(records)
+	w.Flush() // a,b,c	// 类 Flush() 函数将缓冲区的数据写入真实文件，勿忘
+
+	// 批量写入
+	strs := [][]string{{"x", "y", "z"}, {"X", "Y", "Z"}}
+	w.WriteAll(strs)
+	w.Flush()
+	// x,y,z
+	// X,Y,Z
+}