[{"createTime":1735734952000,"id":1,"img":"hwy_ms_500_252.jpeg","link":"https://activity.huaweicloud.com/cps.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=V1g3MDY4NTY=&utm_medium=cps&utm_campaign=201905","name":"华为云秒杀","status":9,"txt":"华为云38元秒杀","type":1,"updateTime":1735747411000,"userId":3},{"createTime":1736173885000,"id":2,"img":"txy_480_300.png","link":"https://cloud.tencent.com/act/cps/redirect?redirect=1077&cps_key=edb15096bfff75effaaa8c8bb66138bd&from=console","name":"腾讯云秒杀","status":9,"txt":"腾讯云限量秒杀","type":1,"updateTime":1736173885000,"userId":3},{"createTime":1736177492000,"id":3,"img":"aly_251_140.png","link":"https://www.aliyun.com/minisite/goods?userCode=pwp8kmv3","memo":"","name":"阿里云","status":9,"txt":"阿里云2折起","type":1,"updateTime":1736177492000,"userId":3},{"createTime":1735660800000,"id":4,"img":"vultr_560_300.png","link":"https://www.vultr.com/?ref=9603742-8H","name":"Vultr","status":9,"txt":"Vultr送$100","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":5,"img":"jdy_663_320.jpg","link":"https://3.cn/2ay1-e5t","name":"京东云","status":9,"txt":"京东云特惠专区","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":6,"img":"new_ads.png","link":"https://www.iodraw.com/ads","name":"发布广告","status":9,"txt":"发布广告","type":1,"updateTime":1735660800000,"userId":3},{"createTime":1735660800000,"id":7,"img":"yun_910_50.png","link":"https://activity.huaweicloud.com/discount_area_v5/index.html?fromacct=261f35b6-af54-4511-a2ca-910fa15905d1&utm_source=aXhpYW95YW5nOA===&utm_medium=cps&utm_campaign=201905","name":"底部","status":9,"txt":"高性能云服务器2折起","type":2,"updateTime":1735660800000,"userId":3}]
Imgcodecs
该类常用于媒体资源文件的读写，如imread()与imwrite()，在没有指明特定情况下，Mat对象的加载模式为CV_8UC3
读
读的核心在于Imgcodecs类的imread() 方法，该方法一个重要构造器如下：
imread(filePath)：参数为被读取的文件路径
private void loadImg(String filePath){ System.loadLibrary(Core.
NATIVE_LIBRARY_NAME); Imgcodecs imgcodecs = new Imgcodecs(); Mat mat = imgcodecs
.imread(filePath); System.out.println("------> mat clos:" + mat.cols()); System.
out.println("------> mat rows:" + mat.rows()); }
控制台结果如下
------> mat clos:200 ------> mat rows:200
写
写的核心在于Imgcodecs类的imwrite() 方法，该方法一个重要构造器如下：
imwrite(filePath, Mat)：第一个参数为待写入的文件路径，第二个为Mat对象
private void writeImg(String filePath){ System.loadLibrary(Core.
NATIVE_LIBRARY_NAME); Imgcodecs imgcodecs = new Imgcodecs(); Mat mat = imgcodecs
.imread(filePath); imgcodecs.imwrite("E:/Chrome/3.jpg", mat); }
此方法调用后将在指定filePath路径下创建名为3.jpg的图片
注意：本例的读写均写为方法形式，接受一个String类型参数供以确定路径。建议在JavaFX（Swing也可）环境下使用FileChooser来确定路径，附录文件路径选择的代码如下：
Node source = (Node) actionEvent.getSource(); Window theStage = source.getScene
().getWindow(); FileChooser fileChooser = new FileChooser(); FileChooser.
ExtensionFilter extFilter = new FileChooser.ExtensionFilter("PNG files (*.png)",
"*.png"); fileChooser.getExtensionFilters().add(extFilter); File file =
fileChooser.showOpenDialog(theStage); //写入文件 writeImg(file.getPath());
