Go 生成 CSV 文件

Go CSV About 1,129 words

写入

f, err := os.Create("test.csv")
if err != nil {
    log.Fatal(err)
}
defer f.Close()

// UTF BOM 防止中文乱码
_, _ = f.WriteString("\xEF\xBB\xBF")

w := csv.NewWriter(f)
_ = w.Write([]string{"第一列", "第二列", "第三列"})
_ = w.Write([]string{"111", "222", "333"})
_ = w.Write([]string{"111", "\"", "\""})
_ = w.Write([]string{"111", `"""`, `"""`})
_ = w.Write([]string{"111", `""`, `""`})
_ = w.Write([]string{"111", `''`, `''`})
_ = w.Write([]string{"111", `'`, `'`})
_ = w.Write([]string{"111", `'''"`, `'''"`})

_ = w.WriteAll([][]string{
    {"111", "\r\n", "333"},
    {"111", "\n", "333"},
    {"111", "\r", "333"},
})

w.Flush()

读取

大文件

//准备读取文件
f, err := os.Open("test.csv")
if err != nil {
    log.Fatal(err)
}
defer f.Close()

r := csv.NewReader(f)
//针对大文件,一行一行的读取文件
for {
    row, err := r.Read()
    if err != nil && err != io.EOF {
        log.Fatal(err)
    }
    if err == io.EOF {
        break
    }
    fmt.Println(row)
}

小文件

f, _ := os.Open("test.csv")
defer f.Close()

r1 := csv.NewReader(f)

content, err := r1.ReadAll()
if err != nil {
    log.Fatal(err)
}

for _, row := range content {
    fmt.Println(row)
}
Views: 2,011 · Posted: 2020-11-12

————        END        ————

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