init

README.md

@@ -1,2 +1,10 @@
 # resize
 批量压缩图片
+
+# 运行
+
+```go
+go build main.go
+
+把main.exe放到待压缩的文件夹内，运行可执行文件，生成resize文件夹数据
+```

go.mod

@@ -0,0 +1,5 @@
+module go-pic-resize
+
+go 1.14
+
+require github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect

go.sum

@@ -0,0 +1,2 @@
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 h1:zYyBkD/k9seD2A7fsi6Oo2LfFZAehjjQMERAvZLEDnQ=
+github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646/go.mod h1:jpp1/29i3P1S/RLdc7JQKbRpFeM1dOBd8T9ki5s+AY8=

main.go

@@ -0,0 +1,76 @@
+package main
+
+import (
+	"fmt"
+	"github.com/nfnt/resize"
+	"image/jpeg"
+	"io/ioutil"
+	"log"
+	"os"
+	"strings"
+)
+
+func main() {
+	// open "test.jpg"
+	path := "./"
+	files, err := ioutil.ReadDir(path)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	pic := []string{".jpg", ".png"}
+	if os.Mkdir("resize", os.ModePerm); err != nil {
+		fmt.Println("resize"+"文件夹创建失败：", err.Error())
+	} else {
+		fmt.Println("resize" + "文件夹创建成功！")
+	}
+	for _, f := range files {
+		if f.IsDir() {
+			continue
+		}
+		for _, v := range pic {
+			if !strings.HasSuffix(f.Name(), v) {
+				continue
+			}
+			//todo 逻辑
+			fmt.Println(f.Name())
+
+			file, err := os.Open(f.Name())
+			if err != nil {
+				log.Fatal(err)
+			}
+
+			// decode jpeg into image.Image
+			img, err := jpeg.Decode(file)
+			if err != nil {
+				log.Fatal(err)
+			}
+			file.Close()
+
+			// resize to width 1000 using Lanczos resampling
+			// and preserve aspect ratio
+
+			kuan := img.Bounds().Dx() //
+			gao := img.Bounds().Dy()  //
+			fmt.Println(kuan)
+			fmt.Println(gao)
+
+			m := resize.Resize(uint(kuan), 0, img, resize.Lanczos3)
+			//m := resize.Resize(1000, 0, img, resize.Lanczos3)
+
+			out, err := os.Create("resize/" + f.Name())
+			if err != nil {
+				log.Fatal(err)
+			}
+			defer out.Close()
+
+			// write new image to file
+			jpeg.Encode(out, m, nil)
+			fmt.Println("------------------")
+
+		}
+
+	}
+	return
+
+}