图片压缩

#废话不说直接上代码

import java.awt.image.BufferedImage;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.util.Iterator;import javax.imageio.IIOImage;import javax.imageio.ImageIO;import javax.imageio.ImageWriteParam;import javax.imageio.ImageWriter;import javax.imageio.metadata.IIOMetadata;import javax.imageio.stream.ImageOutputStream;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGEncodeParam;import com.sun.image.codec.jpeg.JPEGImageEncoder;/** * 图片压缩 *  * @author KEVIN LUAN * */public class CompressImageUtils {public static void main(String[] args) throws IOException {String src = "/Users/kevin/Downloads/img_src.jpg";scaleImage(src);compress(src);}// # >0.75 high quality ,0.5 medium quality ,0.25 low quality// QualityParam=0.95private static float QUALITY = 0.9f;/** * 在压缩后的图片名称价格质量标示 */private static String APPEND_QUALITY_NAME = "_9";public static void compress(String src) throws IOException {File outFile = new File(buildNewName(src));BufferedImage bufferedImage = ImageIO.read(new File(src));JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(bufferedImage);jep.setQuality(QUALITY, false);FileOutputStream out = new FileOutputStream(outFile); // 输出到文件流JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out, jep);encoder.encode(bufferedImage);out.close();}public static void scaleImage(String srcFile) throws IOException {File file = new File(srcFile);BufferedImage src = ImageIO.read(file);int width = src.getWidth();int height = src.getHeight();BufferedImage _image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);_image.getGraphics().drawImage(src, 0, 0, width, height, null); // 绘制缩小后的图Iterator<?> writers = ImageIO.getImageWritersBySuffix("jpg");ImageWriter writer = (ImageWriter) writers.next();ImageWriteParam param = writer.getDefaultWriteParam();param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);param.setCompressionQuality(QUALITY);ImageOutputStream outStream = ImageIO.createImageOutputStream(new File(buildNewName(srcFile)));writer.setOutput(outStream);IIOImage iioImage = new IIOImage(src, null, (IIOMetadata) null);writer.write((IIOMetadata) null, iioImage, param);outStream.flush();outStream.close();}private static String buildNewName(String src) {if (src != null && src.indexOf(".") != -1) {int index = src.lastIndexOf(".");return src.substring(0, index) + APPEND_QUALITY_NAME + src.substring(index);}return src + APPEND_QUALITY_NAME;}}