diff --git a/Main.go b/Main.go index de3dd5c..c6710da 100644 --- a/Main.go +++ b/Main.go @@ -6,20 +6,28 @@ package main -import "Go-StudyExample/example" +import ( + "Go-StudyExample/example" +) func main() { - //--------------------------测试mapStructure的功能----- - //这边的四种使用方式差别感觉不是很大... - example.MapStructureTestFunc() - example.MapStructureTestFunc1() - example.MapStructureTestFunc2() - example.MapStructureTestFunc3() - - //--------------------------测试json包的转换功能 - example.JsonMarshalTest() - example.JsonUnmarshalTest() - - example.TestClone() + ////--------------------------测试mapStructure的功能----- + ////这边的四种使用方式差别感觉不是很大... + //example.MapStructureTestFunc() + //example.MapStructureTestFunc1() + //example.MapStructureTestFunc2() + //example.MapStructureTestFunc3() + // + ////--------------------------测试json包的转换功能 + //example.JsonMarshalTest() + //example.JsonUnmarshalTest() + // + ////克隆测试 + //example.TestClone() + // + ////二维码测试 + //example.QrCodeTest() + //图片测试 + example.ImageTest() } diff --git a/example/Assert.go b/example/Assert.go new file mode 100644 index 0000000..cfed950 --- /dev/null +++ b/example/Assert.go @@ -0,0 +1,13 @@ +/* + * @Author : huangzj + * @Time : 2020/7/6 11:06 + * @Description: + */ + +package example + +func assert(err error) { + if err != nil { + panic(err) + } +} diff --git a/example/ImageExample.go b/example/ImageExample.go new file mode 100644 index 0000000..a56730b --- /dev/null +++ b/example/ImageExample.go @@ -0,0 +1,188 @@ +/* + * @Author : huangzj + * @Time : 2020/7/6 10:42 + * @Description:参考地址:https://www.cnblogs.com/dfsxh/articles/11082359.html + */ + +package example + +import ( + "fmt" + "github.com/golang/freetype" + "github.com/nfnt/resize" + "image" + "image/color" + "image/draw" + "image/jpeg" + "image/png" + "io/ioutil" + "log" + "os" +) + +const ( + filePath = "example/image/image.jpg" //原始logo图片路径 + logoPath = "example/image/log.png" //原始图片路径 + + resizeImagePath = "example/image/resize.png" //重置尺寸图片的路径 + resizeImagePath2 = "example/image/resize2.png" //重置尺寸图片的路径 + resizeWidth = 1000 //重置尺寸图片的宽度 + resizeHeight = 300 //重置尺寸图片的高度 + + waterMarkPath = "example/image/waterMakerImage.png" //携带水印的图片 + wordPath = "example/image/wordPath.png" //携带文字的图片 +) + +func ImageTest() { + + AddWordToImg() //设置文字到图片 + + //图片压缩的两种方式,压缩率好像差不多,对应的尺寸比例不一样 + ResizeImage() + ResizeImage2() + + AddWaterMark() //添加水印 +} + +//图片压缩 +func ResizeImage() { + // 打开图片并解码 + fileOrigin, _ := os.Open(filePath) + originFile, _ := os.Stat(filePath) + origin, err := jpeg.Decode(fileOrigin) //这边这个方法之前尝试使用截图的数据来做,会报错:missing SOI marker,似乎是因为base64编码的问题 + defer fileOrigin.Close() + + canvas := resize.Resize(resizeWidth, resizeHeight, origin, resize.Lanczos3) //尺寸重置的画布对象 + fileOut, err := os.Create(resizeImagePath) //创建重置大小后的图片文件 + if err != nil { + log.Fatal(err) + } + defer fileOut.Close() + _ = jpeg.Encode(fileOut, canvas, &jpeg.Options{Quality: 80}) //编码对应的重置后图片文件(Options中的参数代表图片质量) + targetFile, _ := os.Stat(resizeImagePath) + fmt.Println(fmt.Sprintf("原始图片长度%d,当前图片长度%d", originFile.Size(), targetFile.Size())) +} + +//图片压缩2(这种方式似乎会按照图片的比例进行缩放-取较小的长或宽的比例进行缩放,可以尝试调整一下resize的长度来对比结果) +func ResizeImage2() { + // 打开图片并解码 + fileOrigin, _ := os.Open(filePath) + originFile, _ := os.Stat(filePath) + origin, err := jpeg.Decode(fileOrigin) //这边这个方法之前尝试使用截图的数据来做,会报错:missing SOI marker,似乎是因为base64编码的问题 + defer fileOrigin.Close() + + canvas := resize.Thumbnail(resizeWidth, resizeHeight, origin, resize.Lanczos3) //尺寸重置的画布对象 + fileOut, err := os.Create(resizeImagePath2) //创建重置大小后的图片文件 + if err != nil { + log.Fatal(err) + } + defer fileOut.Close() + _ = jpeg.Encode(fileOut, canvas, &jpeg.Options{Quality: 100}) //编码对应的重置后图片文件(Options中的参数代表图片质量) + targetFile, _ := os.Stat(resizeImagePath2) + fmt.Println(fmt.Sprintf("原始图片长度%d,当前图片长度%d", originFile.Size(), targetFile.Size())) +} + +//在图片上添加水印 +func AddWaterMark() { + // 打开图片并解码 + fileOrigin, _ := os.Open(filePath) + origin, _ := jpeg.Decode(fileOrigin) + defer fileOrigin.Close() + + // 打开水印图并解码 + fileWatermark, _ := os.Open(logoPath) + watermark, _ := png.Decode(fileWatermark) + defer fileWatermark.Close() + originSize := origin.Bounds() //原始图界限 + + canvas := image.NewNRGBA(originSize) //创建新图层 + + draw.Draw(canvas, originSize, origin, image.ZP, draw.Src) // 贴原始图 + + draw.Draw(canvas, watermark.Bounds().Add(image.Pt(originSize.Dx()/2, originSize.Dy()/2)), watermark, image.ZP, draw.Over) // 贴水印图 + + //生成新图片 + createImage, _ := os.Create(waterMarkPath) + _ = jpeg.Encode(createImage, canvas, &jpeg.Options{95}) + defer createImage.Close() +} + +type RGBA struct { // Pix保管图像的像素色彩信息,顺序为R, G, B, A + // 像素(x, y)起始位置是Pix[(y-Rect.Min.Y)*Stride + (x-Rect.Min.X)*4] + Pix []uint8 + // Stride是Pix中每行像素占用的字节数 + Stride int + // Rect是图像的范围 + Rect image.Rectangle +} + +const ( + fontPath = "F://Go_BySelf//src//Go-StudyExample//example//image//微软vista黑体.ttf" //字体的存储位置 + content = "i love 许小baby" +) + +//在图片上添加文字 +//使用到的包:go get github.com/golang/freetype +//参考地址;http://www.sunaloe.cn/d/36.html +func AddWordToImg() { + img := copyBackgroundImage() //从图片中复制出图层 + generateContentFont(img) //设置字体和Content + createImage, _ := os.Create(wordPath) + _ = jpeg.Encode(createImage, img, &jpeg.Options{Quality: 95}) + defer createImage.Close() +} + +func generateContentFont(img *image.NRGBA) { + //读取字体数据 + fontBytes, err := ioutil.ReadFile(fontPath) + checkErr(err) + + //载入字体数据 + font, err := freetype.ParseFont(fontBytes) + checkErr(err) + + f := freetype.NewContext() + //设置分辨率 + f.SetDPI(72) + //设置字体 + f.SetFont(font) + //设置尺寸 + f.SetFontSize(100) + f.SetClip(img.Bounds()) + //设置输出的图片 + f.SetDst(img) + //设置字体颜色 + f.SetSrc(image.NewUniform(color.RGBA{R: 12, G: 225, B: 12, A: 99})) + + //设置字体的位置 + pt := freetype.Pt(500, 500+int(f.PointToFixed(26))>>8) + + _, err = f.DrawString(content, pt) + checkErr(err) +} + +func copyBackgroundImage() *image.NRGBA { + imgFile, _ := os.Open(filePath) + defer imgFile.Close() + //获取到底部的照片作为背景,也可以理解为是在底部的照片上面写入文字 + backGround, _, _ := image.Decode(imgFile) + dx := backGround.Bounds().Size().X + dy := backGround.Bounds().Size().Y + + img := image.NewNRGBA(image.Rect(0, 0, dx, dy)) //初始化新生成图片 + + //通过循环像素点把图片复制到新的图层.作为新图层的背景,这边其实也可以直接设置非图片的背景图 + for y := 0; y < dy; y++ { + for x := 0; x < dx; x++ { + img.Set(x, y, backGround.At(x, y)) + } + } + + return img +} + +func checkErr(err error) { + if err != nil { + panic(err) + } +} diff --git a/example/QrCodeExample.go b/example/QrCodeExample.go new file mode 100644 index 0000000..30be9a5 --- /dev/null +++ b/example/QrCodeExample.go @@ -0,0 +1,78 @@ +/* + * @Author : huangzj + * @Time : 2020/7/3 12:00 + * @Description:参考文章:https://zhuanlan.zhihu.com/p/32035735 + */ + +package example + +import ( + "fmt" + "github.com/boombuler/barcode" + "github.com/boombuler/barcode/qr" + qrCode "github.com/skip2/go-qrcode" + "image/color" + "image/png" + "log" + "os" +) + +const ( + url1 = "https://image.baidu.com/search/detail?ct=503316480&z=undefined&tn=baiduimagedetail&ipn=d&word=%E7%BE%8E%E5%A5%B3%E5%9B%BE%E7%89%87&step_word=&ie=utf-8&in=&cl=2&lm=-1&st=undefined&hd=undefined&latest=undefined©right=undefined&cs=1848592761,1307412614&os=1322849054,135797925&simid=0,0&pn=644&rn=1&di=41830&ln=2454&fr=&fmq=1593763755230_R&fm=&ic=undefined&s=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&is=0,0&istype=0&ist=&jit=&bdtype=11&spn=0&pi=0&gsm=258&hs=2&objurl=http%3A%2F%2Fup.enterdesk.com%2Fedpic%2Fb2%2F9d%2Fac%2Fb29dacffee2403e8b3bec67c9abcd647.jpg&rpstart=0&rpnum=0&adpicid=0&force=undefined" + url2 = "https://www.baidu.com/link?url=oH5FRzYYHiZNm84fp0CaQtGZgw2-WRZgIj7B3Mmmzy0iM_EcVHkHmSHQwU6LuPBi6o24N2ObdLJEL1l6aIY5KeXia3S-9ysVL5K7Qe_SnHeXNOxqbI3UbpSBktjFfbIunH9Y9OteFNO-YYsx2Nh1YbOVrZhzh0Ne26W3_73xgsX7ys418xQJOGiGteVwk6UaEqPaQgqlUtSHBCSjH_FZuJmxswzP-5X5Hg894diQSm8136aulR3oC7AB0LFSmCZoIviAdOGagItOAqIdTP_P7NWn7rzebKAFoS0j-q8fMLvoZJYK1xTir1-scoBZ1aTSdEsrhTcpKzhHyG5CarDTj3BdmD96JzBppy9rDMXQ8XstX8gzJb4LrTCdg5t9RMK11wzjmgJhkj-9deb7iZqsdVDBgUpur-UxR6vsa5OvXkgLd4Tzv1fTm3-UjdYgfPDUQ9pGGLzLQQKO8i4eEEFsrSJZCx4eAdD94GBbOOVpDZtwJSwVqLJKvPtu8h0gt-lOmktaHxJffIXZfBKtfMfCnc_fqomMQAGoaaIkehD9X57zeK6OZg1f3kM7Azv5pzs2ITgaErADeN0vdQbZ8fWBT0tqTmmDNRJLgzVnBx9V9FMhgD6eAOHunHxHAT5g_DMr&timg=https%3A%2F%2Fss0.bdstatic.com%2F94oJfD_bAAcT8t7mm9GUKT-xh_%2Ftimg%3Fimage%26quality%3D100%26size%3Db4000_4000%26sec%3D1593763752%26di%3D3a1f64455c44b927fc36a894140e279e%26src%3Dhttp%3A%2F%2F00.minipic.eastday.com%2F20170420%2F20170420105628_ea6da92abc46098d8e03ad2ee55abeb7_9.jpeg&click_t=1593763828401&s_info=2543_1335&wd=&eqid=916eb61300000776000000065efee7a7" + url3 = "http://note.youdao.com/noteshare?id=de3af43fd227f9a23e23f50d0dab105f" + + qrcode1 = "example/image/log_qrcode.png" + qrcode2 = "example/image/log_qrcode1.png" +) + +func QrCodeTest() { + + fmt.Printf("通过github.com/skips/go-qrcode 实现生成二维码") + + //生成黑白二维码 + err := qrCode.WriteFile(url1, qrCode.High, 255, qrcode1) + if err != nil { + panic(err) + } + + //生成字节数组信息 + qrBytes, err := qrCode.Encode(url3, qrCode.High, 255) + for _, r := range qrBytes { + fmt.Println(r) + } + + //自定义二维码信息 + qrCode1, err := qrCode.New(url2, qrCode.Medium) + if err != nil { + log.Fatal(err) + } else { + qrCode1.BackgroundColor = color.RGBA{250, 250, 50, 255} //设置背景色 + qrCode1.ForegroundColor = color.Black //设置二维码内背景色 + qrCode1.WriteFile(256, qrcode2) + } + + //------------------------------------------------------------------------------------------------ + + fmt.Printf("通过 github.com/boombuler/barcode 实现生成二维码") + content := "https://zhuanlan.zhihu.com/p/59125443" //二维码内容信息 + + code, err2 := qr.Encode(content, qr.L, qr.Unicode) //对二维码进行编码 + assert(err2) + + img, err3 := barcode.Scale(code, 300, 300) //图片大小设置 + assert(err3) + + file, err4 := os.Create("F:/Go_BySelf/src/Go-StudyExample/example/image/qr_code.png") //创建文件 + assert(err4) + + err5 := png.Encode(file, img) //图片编码生成 + //err6 := jpeg.Encode(file, img, &jpeg.Options{100}) //图像质量值为100,是最好的图像显示 + assert(err5) + + err6 := file.Close() + assert(err6) + + //------------------------------------------------------------------------------------------------ + +} diff --git a/example/image/image.jpg b/example/image/image.jpg new file mode 100644 index 0000000..51a93b7 Binary files /dev/null and b/example/image/image.jpg differ diff --git a/example/image/log.png b/example/image/log.png new file mode 100644 index 0000000..562106f Binary files /dev/null and b/example/image/log.png differ diff --git a/example/image/微软vista黑体.ttf b/example/image/微软vista黑体.ttf new file mode 100644 index 0000000..dfd6b9f Binary files /dev/null and b/example/image/微软vista黑体.ttf differ diff --git a/go.mod b/go.mod index 45fad5e..847edfb 100644 --- a/go.mod +++ b/go.mod @@ -2,4 +2,18 @@ module Go-StudyExample go 1.13 -require github.com/goinggo/mapstructure v0.0.0-20140717182941-194205d9b4a9 +require ( + github.com/Bowery/prompt v0.0.0-20190916142128-fa8279994f75 // indirect + github.com/boombuler/barcode v1.0.0 + github.com/dchest/safefile v0.0.0-20151022103144-855e8d98f185 // indirect + github.com/goinggo/mapstructure v0.0.0-20140717182941-194205d9b4a9 + github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 + github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect + github.com/kardianos/govendor v1.0.9 // indirect + github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 + github.com/pkg/errors v0.9.1 // indirect + github.com/skip2/go-qrcode v0.0.0-20200617195104-da1b6568686e + golang.org/x/image v0.0.0-20200618115811-c13761719519 // indirect + golang.org/x/tools v0.0.0-20200708003708-134513de8882 // indirect + gopkg.in/yaml.v2 v2.3.0 // indirect +) diff --git a/readme.md b/readme.md index 82d9aec..bfc7dfd 100644 --- a/readme.md +++ b/readme.md @@ -5,4 +5,19 @@ map与struct之间转换的处理工具使用示例,参考代码地址:https json与struct之间转换处理工具使用示例 -2020/5/15 : 添加CloneExample,测试go语言的对象内存和深度克隆的实现关于对象克隆可参考文章[知乎-](https://zhuanlan.zhihu.com/p/59125443)、[知乎-](https://zhuanlan.zhihu.com/p/58065429) \ No newline at end of file +2020/5/15 : 添加CloneExample,测试go语言的对象内存和深度克隆的实现关于对象克隆可参考文章[知乎-](https://zhuanlan.zhihu.com/p/59125443)、[知乎-](https://zhuanlan.zhihu.com/p/58065429) + + +2020/7/8 : 添加两种二维码生成使用示例,添加两种图片压缩方式、添加水印示例,添加文字到图片 + + +# mod vendor模式加载包 +通过go mod的方式加载的github上面的包会有报红的问题,但是包本身是可以运行的,这样就是会有一个问题,如果你想要点击去看方法的内容,没办法做到 + +查阅了网上提供的处理方式,通过设置GOPATH 和Go Modules(vgo)可以解决相应的问题,但是我在这样处理之后依然会出现报红的问题 + +后面通过使用vendor包的方式来处理,就避免了报红的问题 + +处理步骤如下 : +- 通过 go get github.com/kardianos/govendor 命令下载govendor命令 +- 通过 go mod vendor 切换到vendor管理