如何在Golang中使用compress/gzip压缩数据

package main

import (
    "bytes"
    "compress/gzip"
    "fmt"
)

func main() {
    var buf bytes.Buffer
    // 创建gzip.Writer，输出写入buf
    gz := gzip.NewWriter(&buf)
    
    // 写入要压缩的数据
    _, err := gz.Write([]byte("Hello, this is some data to compress!"))
    if err != nil {
        panic(err)
    }

    // 关闭gzip writer，完成压缩
    err = gz.Close()
    if err != nil {
        panic(err)
    }

    // 压缩后的数据
    compressedData := buf.Bytes()
    fmt.Printf("Compressed size: %d bytes\n", len(compressedData))
}

package main

import (
    "compress/gzip"
    "os"
)

func main() {
    file, err := os.Create("output.txt.gz")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    gz := gzip.NewWriter(file)
    defer gz.Close() // 确保压缩完成并写入尾部

    _, err = gz.Write([]byte("This will be compressed and saved to a .gz file."))
    if err != nil {
        panic(err)
    }
}

gz, err := gzip.NewWriterLevel(&buf, gzip.BestCompression)
if err != nil {
    panic(err)
}