go语言通过zlib压缩数据的方法

本文实例讲述了go语言通过zlib压缩数据的方法。分享给大家供大家参考。具体实现方法如下:

本文实例讲述了go语言实现文件分割的方法。分享给大家供大家参考。具体实现方法如下:

复制代码 代码如下:

复制代码 代码如下:

package main
import (
    "fmt"
    "compress/zlib"
    "bytes"
)
func main() {
    var input = []byte("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKsAAAAgCAYAAABtn4gCAAAI9klEQVR4Xu2cfYxcVRmHn3Pu3Nm6lXa2ta0AYlsgFSGgThMU0W5hGkqApNGARk3cGm3BRN3FYGuCISrBXaNphcSkG2I3hn9gY2gSNWq32AoE1C6KRihFti2QSgvsTmm783HvOa zM69cSS8Tacsq7n2SX87cj5P7ZvLs2ztnbseICG8HMjIsbxMyMnIoxhja8fJnriuYMNdjOsIVNhd0Y0wBRbxH6nHZ16OdUot2iXNDC3/2mzJtOImOnpHJ2p4Xr13ZkDTYJLHrwRgw4L1gAptIFzt87AoSuzXi/BqJ3KZ/XL1iSGLXd9aOh8u81WRksh5cefmUeFuBgmBABHEeEziwBrUVvCCxayWaSow419MY17zw4eVrz3ls9zbeKjIyWV 4bPkmiVyvCtnqps6Bta2uahJZxQs4jziHxP7fxS1I7B947tJLN5/7xBN9tIeN37yNN0EXME6LecAEGfR/746ZJeuBSy9RUVsiGucxsYPAYuxUzOtlFQEniG8JS xRaTW d/ y97P46Sf7yMg4XbLuPW/ZGuqu1 cE4y0m8OAs0uyopjmqqArJrYDz4FVU1wrJ6959S5ftWjL29DZOlYxM1ut/eU3h7tEjW2/ yWE683kIPBJYTGzBGkwjaFdVXRFIZPXSktWJ3hbotheUrQ1hdzaELXMqZGSyCmzaV5xT PNDR/jg3hqzcjmM9aCSijHQDLBwISxYAAjUD0PtUEtKmYoHWq9bUwQDYKRgZ8kmxljLyZKRyXrdz1cXgB5jDb/4xLtY8oPnmRc78tYiLdMwBrjicuxN6xg/YwGxWIwxzM4bOuUQPH8X9thvsYFvRJpj8NrYSOjIhdJTv/2dfUCZ9mwAbgCKJIwAw8Dgf3j gGYi5YPZKLBcz 8HSrTYqHPQY1qHAqNawwAn0q/nrwLGdFvngta9UetZqueuI2FEj4 Shp6vc9FrDAIDM0pWxPRgaPLq4k5 V5zNqkeOQi5sCguCWb2aV756Kzv XuXQAU8 pClrFDsWzZ7PVRcMcOaR2wmPPdCUMxc6gtC35LVCC4P3pgfYTDpdwHYVReVgTIUpqSgKqIhb9PhYIhEbEtFYnrJa0KXH7kdRxpL59Cf7GFZJ9A CkkqZRkml6gIGdFynKamQW3T/sNatx9iu9Y6lvydMqJxJjVrLjJFVYIUh4fer53Px46 ycLLOnDDPrO6PM/61bzD48DgeQxgGRM5iAOeFvcfrPHu4wvorvsv5s1 mI/o1b4xZ0UbW 1WGEeDGlK6YJl1Jzx1GUSF2A0UVYSBlXr9eZ1WKbP0qxnoVSqFLayzpeGN6B2Q4OZbUo8Lfn3LdjSpkSeevR1GxiyrpxrQ5Wu/GmfFsgEg3CURnvoMdl5/B8Thmol5j1i293Dc6wZHJiFrdUa3GTFYjjjdSaaRWiykfjxh fIL6/G/TFm 6SaekmUgRFd1OYxAYTt v8ikp4q9Kla3FQHon19qSLkvaOSn7BklYz4kMpNRb1OuMpsqY7Fs3Yx5kEaGA8Dr2XLOIPXMFd/5SDs85kyeeO8Zk3TFZixuJmKw0UtXUYir1mD8dOMrByjm48CLSEAHBFEinqOPwm1zkHyGdUVTMNpK3ryOdieQYpdTrpjOGjpoTJE pt9SuFpV4QueUZsg9KycQFPLsum4h73tyNvvHIyqRw3khCiyBNVhrVEBp7o dEDlP1VkI5kJECga8ob0kjNGW9nKcouTFpOtqHe3FK55EPWOk0f496de0o2smyJqsNgGGhKMrFvLXox0sNjAZO rOE1qV1QAYBJW1GU lVsOGljREDN4b/keYeBtddwQYpT2jM0JWnCDeYKzaqpiOgCdLc1i1aDa1eg0XBETWYrAqKwjaXcXjnaMjEKx/FUnrqmLwLiDjpGQdyB6 BsRRFiekGMYLcw/RVZhkXidMVitUqlUq9anUWqlVmaxN7a9w9lzLsvmvINW/pHdVZ6dSbn9Px1Kml/R7wPZ1LJ2mbjaqYxElkzWWnRKDOJAUYe/ZM8imz36AwFc4PnmsmWP/GiutMfBVbrv AvLj30oVVZzFxcFUdra/h SG//L910j7T9i6RqvnTlMtJf0DyWT1EbskEiQW8CAoymOHH Wl3OMM9hRZkI pHzvSTE3HhR2Oe76wnIL/KbnKr1AUg4iKGuUaCXa1vy/Ttcx0Srz1DCSyckPqWrAu6E9TZx1O3pNUYbtm1tJVLEOuJvg2wt71t81srw5x761F7uvrpvfaC lrZLhvJffeUuTB/T9iQaX/BFG9t/g4II5ComqIi 0Qb8yNwJhKKbro3Q IpjRNtwLrE0HYrTVsSWpgRM ZDtbr9YrAs8C41rMdEN0uzZhvsEa tL181ZZVQyagx jDVSZnEAuGhN2v/KGZ985eTOeiTsQJWw8c45k/jrHxrKeYm49f/0 /qKj1lqhRPTf07msPlEXaLuucl3yvTkmTdN7pYVClXacppjwbMF3olxdsAEqaDShayyj/5xhRa4wxdP 4VLAB 3KdthDMMti8aQqLBWNIxdWFuOK5UMa5c9lTdAQeMC1RX uoOaJqnupkWPaxXXL2mn1lEeGkycgeEdz55ZHyx 6 ai34B8AiAtbTEjYATCuGBPFCB46b3rOfvBVELMmHqVxT1LgaUq2ExPVg7bmffLbMKZGRyao89JUd2z66 crN4unNOQsdYEIwOTCBwVgQk4gqHq4 40XO66wiLkC8xamoLgqIaiH1SiPVYPOSTz zjdNCRiar8kjvg30f eGVhLH0hpEl6DDY0GBy0hQWCxiQWChInU/NfZG4lsd700iAjwNcPaBez1Gv5IhqdvP5n9vbx2klI5NVefTrD/Zd9v2Vu JItoY1U8jlbSKsdlgXCT1dBwmjkFrN4p3BxQFxs6NOxZadM2uXfT77f1cZp/kDVhrL7 wuGMOmIGd6cqEhaMSqrBfnKtw6/yAWdHnKEEe2ETP1esgLfRd9cU95Wn6RJSOTVeFD31lRMJYea80KY2n fNAd817i3FyMCIinLMJO780u8QxdcvNTp//ngzIyWU8jGRnZrwhmZPwT5I Pd2qC5IkAAAAASUVORK5CYII")
威尼斯人棋牌,    var buf bytes.Buffer
    compressor, err := zlib.NewWriterLevelDict(&buf, zlib.BestCompression, input)
    if err != nil {
        fmt.Println("压缩失败")
        return
    }
    compressor.Write(input)
    compressor.Close()
    fmt.Println(buf.Bytes())
    fmt.Println(len(buf.Bytes()))
    fmt.Println(len(input))
}

import (
 // "bufio"
 "flag"
 "fmt"
 "io"
 "os"
)
import "strconv"
var infile *string = flag.String("f", "Null", "please input a file name or dir.")
var size *string = flag.String("s", "0", "please input a dst file size.")
//func dataCopy(file *os.File, file *os.File)
func SplitFile(file *os.File, size int) {
 finfo, err := file.Stat()
 if err != nil {
  fmt.Println("get file info failed:", file, size)
 }
 fmt.Println(finfo, size)
 //每次最多拷贝1m
 bufsize := 1024 * 1024
 if size < bufsize {
  bufsize = size
 }
 buf := make([]byte, bufsize)
 num := (int(finfo.Size()) size - 1) / size
 fmt.Println(num, len(buf))
 for i := 0; i < num; i {
  copylen := 0
  newfilename := finfo.Name() strconv.Itoa(i)
  newfile, err1 := os.Create(newfilename)
  if err1 != nil {
   fmt.Println("failed to create file", newfilename)
  } else {
   fmt.Println("create file:", newfilename)
  }
  for copylen < size {
   n, err2 := file.Read(buf)
   if err2 != nil && err2 != io.EOF {
    fmt.Println(err2, "failed to read from:", file)
    break
   }
   if n <= 0 {
    break
   }
   //fmt.Println(n, len(buf))
   //写文件
   w_buf := buf[:n]
   newfile.Write(w_buf)
   copylen = n
  }
 }

本文由威尼斯人棋牌发布于计算机教程,转载请注明出处:go语言通过zlib压缩数据的方法