1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
package main
import (
"bytes"
"fmt"
"io"
"os"
"path"
"github.com/chindeo/czlib"
)
func main() {
// 提取文件内容
f, err := os.Open("./data.json")
if err != nil {
fmt.Printf("os open %v\n", err)
return
}
// 压缩内容
var b bytes.Buffer
w, err := czlib.NewWriterLevel(&b, -1)
if err != nil {
fmt.Printf("flate new writer %v\n", err)
return
}
defer w.Close()
_, err = io.Copy(w, f)
if err != nil {
fmt.Printf("zlib new reader %v", err)
return
}
w.Flush()
// 将压缩后内容写入文件
_, err = writeBytes("./data.zip", b.Bytes())
if err != nil {
fmt.Printf("WriteBytes %v\n", err)
return
}
// 解压内容
r, err := czlib.NewReader(&b)
if err != nil {
fmt.Printf("NewReader %v\n", err)
return
}
defer r.Close()
_, err = io.Copy(os.Stdout, r)
if err != nil {
fmt.Printf("io copy %v\n", err)
return
}
}
func writeBytes(filePath string, b []byte) (int, error) {
os.MkdirAll(path.Dir(filePath), os.ModePerm)
fw, err := os.Create(filePath)
if err != nil {
return 0, err
}
defer fw.Close()
return fw.Write(b)
}
|