java压缩图片_JAVA_编程开发_程序员俱乐部

import java.awt.Image;??
import java.awt.image.BufferedImage;??
import java.io.File;??
import java.io.FileNotFoundException;??
import java.io.FileOutputStream;??
import java.io.IOException;??
import java.io.InputStream;??
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import javax.imageio.ImageIO;??
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import com.sun.image.codec.jpeg.JPEGCodec;??
import com.sun.image.codec.jpeg.JPEGEncodeParam;??
import com.sun.image.codec.jpeg.JPEGImageEncoder;??
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public class ImageZipUtil {??
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??? /**?
???? * 压缩图片文件?
???? * 先保存原文件，再压缩、上传?
???? *??
???? * @param oldFile?
???? *??????????? 要进行压缩的文件全路径?
???? * @param width?
???? *??????????? 宽度?
???? * @param height?
???? *??????????? 高度?
???? * @param quality?
???? *??????????? 质量?
???? * @param smallIcon?
???? *??????????? 小图片的后缀?
???? * @return 返回压缩后的文件的全路径?
???? */?
??? public String zipImageFile(String oldFile, int width, int height,??
??????????? float quality, String smallIcon) {??
??????? if (oldFile == null) {??
??????????? return null;??
??????? }??
??????? String newImage = null;??
??????? try {??
??????????? /** 对服务器上的临时文件进行处理 */?
??????????? Image srcFile = ImageIO.read(new File(oldFile));
??????????? int w = srcFile.getWidth(null);
??????????? System.out.println(w);
???????????
??????????? System.out.println(smallIcon);
??????????? System.out.println(smallIcon);
??????????? int h = srcFile.getHeight(null);
??????????? System.out.println(h);
??????????? //width = w/4;
??????????? //height = h/4;
???????????
??????????? /** 宽,高设定 */?
??????????? BufferedImage tag = new BufferedImage(width, height,??
??????????????????? BufferedImage.TYPE_INT_RGB);??
??????????? tag.getGraphics().drawImage(srcFile, 0, 0, width, height, null);??
??????????? String filePrex = oldFile.substring(0, oldFile.indexOf('.'));??
??????????? /** 压缩后的文件名 */?
??????????? newImage = filePrex + smallIcon??
??????????????????? + oldFile.substring(filePrex.length());??
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??????????? /** 压缩之后临时存放位置 */?
??????????? FileOutputStream out = new FileOutputStream(newImage);??
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??????????? JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);??
??????????? JPEGEncodeParam jep = JPEGCodec.getDefaultJPEGEncodeParam(tag);??
??????????? /** 压缩质量 */?
??????????? jep.setQuality(quality, true);??
??????????? encoder.encode(tag, jep);??
??????????? out.close();??
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??????? } catch (FileNotFoundException e) {??
??????????? e.printStackTrace();??
??????? } catch (IOException e) {??
??????????? e.printStackTrace();??
??????? }??
??????? return newImage;??
??? }??
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??? /**?
???? * 保存文件到服务器临时路径?
???? *??
???? * @param fileName?
???? * @param is?
???? * @return 文件全路径?
???? */?
??? public String writeFile(String fileName, InputStream is) {??
??????? if (fileName == null || fileName.trim().length() == 0) {??
??????????? return null;??
??????? }??
??????? try {??
??????????? /** 首先保存到临时文件 */?
??????????? FileOutputStream fos = new FileOutputStream(fileName);??
??????????? byte[] readBytes = new byte[512];// 缓冲大小??
??????????? int readed = 0;??
??????????? while ((readed = is.read(readBytes)) > 0) {??
??????????????? fos.write(readBytes, 0, readed);??
??????????? }??
??????????? fos.close();??
??????????? is.close();??
??????? } catch (FileNotFoundException e) {??
??????????? e.printStackTrace();??
??????? } catch (IOException e) {??
??????????? e.printStackTrace();??
??????? }??
??????? return fileName;??
??? }??
??? public static void main(String[] args){?
???? ImageZipUtil u = new ImageZipUtil();
??????? u.zipImageFile("e:/SAM_0006.JPG", 128, 128, 1f, "x2");??
??????????
??? }??
}

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• ImageZipUtil.zip (1.4 KB)
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