如何使用Golang的encoding/csv包来读取和写入CSV文件

package main

import (
    "encoding/csv"
    "fmt"
    "os"
)

func main() {
    file, err := os.Open("data.csv")
    if err != nil {
        fmt.Println("打开文件失败:", err)
        return
    }
    defer file.Close()

    reader := csv.NewReader(file)
    records, err := reader.ReadAll()
    if err != nil {
        fmt.Println("读取CSV失败:", err)
        return
    }

    for i, record := range records {
        fmt.Printf("第%d行: %v\n", i+1, record)
    }
}

package main

import (
    "encoding/csv"
    "os"
)

func main() {
    file, err := os.Create("output.csv")
    if err != nil {
        fmt.Println("创建文件失败:", err)
        return
    }
    defer file.Close()

    writer := csv.NewWriter(file)
    defer writer.Flush() // 必须调用Flush，否则数据可能未写入

    records := [][]string{
        {"姓名", "年龄", "城市"},
        {"张三", "25", "北京"},
        {"李四", "30", "上海"},
    }

    for _, record := range records {
        if err := writer.Write(record); err != nil {
            fmt.Println("写入行失败:", err)
            return
        }
    }
}

writer.Write([]string{"Alice", "Engineer", "喜欢\"编程\"和,写代码"})

reader := csv.NewReader(file)
reader.Comma = ';'

writer := csv.NewWriter(file)
writer.Comma = '\t' // 使用制表符