golang zip压缩，解压(含目录文件)

package ziptest
import (
    "archive/zip"
    "io"
    "os"
    "strings"
)
//压缩文件
//files 文件数组，可以是不同dir下的文件或者文件夹
//dest 压缩文件存放地址
func Compress(files []*os.File, dest string) error {
    d, _ := os.Create(dest)
    defer d.Close()
    w := zip.NewWriter(d)
    defer w.Close()
    for _, file := range files {
        err := compress(file, "", w)
        if err != nil {
            return err
        }
    }
    return nil
}
func compress(file *os.File, prefix string, zw *zip.Writer) error {
    info, err := file.Stat()
    if err != nil {
        return err
    }
    if info.IsDir() {
        prefix = prefix + "/" + info.Name()
        fileInfos, err := file.Readdir(-1)
        if err != nil {
            return err
        }
        for _, fi := range fileInfos {
            f, err := os.Open(file.Name() + "/" + fi.Name())
            if err != nil {
                return err
            }
            err = compress(f, prefix, zw)
            if err != nil {
                return err
            }
        }
    } else {
        header, err := zip.FileInfoHeader(info)
        header.Name = prefix + "/" + header.Name
        if err != nil {
            return err
        }
        writer, err := zw.CreateHeader(header)
        if err != nil {
            return err
        }
        _, err = io.Copy(writer, file)
        file.Close()
        if err != nil {
            return err
        }
    }
    return nil
}
//解压
func DeCompress(zipFile, dest string) error {
    reader, err := zip.OpenReader(zipFile)
    if err != nil {
        return err
    }
    defer reader.Close()
    for _, file := range reader.File {
        rc, err := file.Open()
        if err != nil {
            return err
        }
        defer rc.Close()
        filename := dest + file.Name
        err = os.MkdirAll(getDir(filename), 0755)
        if err != nil {
            return err
        }
        w, err := os.Create(filename)
        if err != nil {
            return err
        }
        defer w.Close()
        _, err = io.Copy(w, rc)
        if err != nil {
            return err
        }
        w.Close()
        rc.Close()
    }
    return nil
}
func getDir(path string) string {
    return subString(path, 0, strings.LastIndex(path, "/"))
}
func subString(str string, start, end int) string {
    rs := []rune(str)
    length := len(rs)
    if start < 0 || start > length {
        panic("start is wrong")
    }
    if end < start || end > length {
        panic("end is wrong")
    }
    return string(rs[start:end])
}

测试代码：

package ziptest
import (
    "os"
    "testing"
)
func TestCompress(t *testing.T) {
    f1, err := os.Open("/home/zzw/test_data/ziptest/gophercolor16x16.png")
    if err != nil {
        t.Fatal(err)
    }
    defer f1.Close()
    f2, err := os.Open("/home/zzw/test_data/ziptest/readme.notzip")
    if err != nil {
        t.Fatal(err)
    }
    defer f2.Close()
    f3, err := os.Open("/home/zzw/test_data")
    if err != nil {
        t.Fatal(err)
    }
    defer f3.Close()
    var files = []*os.File{f1, f2, f3}
    dest := "/home/zzw/test_data/test.zip"
    err = Compress(files, dest)
    if err != nil {
        t.Fatal(err)
    }
}
func TestDeCompress(t *testing.T) {
    err := DeCompress("/home/zzw/test_data/test.zip", "/home/zzw/test_data/de")
    if err != nil {
        t.Fatal(err)
    }
}