package com.dji.sample.territory.utils;
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import javax.imageio.ImageIO;
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import javax.imageio.ImageWriteParam;
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import javax.imageio.ImageWriter;
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import javax.imageio.stream.ImageOutputStream;
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import javax.imageio.stream.MemoryCacheImageOutputStream;
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import java.awt.image.BufferedImage;
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import java.io.*;
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import java.nio.file.Files;
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import java.nio.file.StandardCopyOption;
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public class ImgZipUtil {
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/**
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* 图片压缩
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*
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* @param originalImageFile
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* @param compressionQuality 图片压缩质量 0-1
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* @return
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* @throws IOException
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*/
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public static File compressImageAndGetFile(File originalImageFile, float compressionQuality) throws IOException {
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BufferedImage originalImage = ImageIO.read(originalImageFile);
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try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) {
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ImageWriter writer = ImageIO.getImageWritersByFormatName("jpg").next();
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try (ImageOutputStream ios = new MemoryCacheImageOutputStream(baos)) {
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writer.setOutput(ios);
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ImageWriteParam param = writer.getDefaultWriteParam();
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param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
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param.setCompressionQuality(compressionQuality);
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writer.write(null, new javax.imageio.IIOImage(originalImage, null, null), param);
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} finally {
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writer.dispose();
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}
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InputStream in = new ByteArrayInputStream(baos.toByteArray());
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File tempFile = File.createTempFile("compressed-", ".jpg");
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tempFile.deleteOnExit();
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Files.copy(in, tempFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
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return tempFile;
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}
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}
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}
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