WEB源码(ASP,PHP,...)

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JavaScript

ImageUpload.java：源码内容
							package com.chinacannel.common;
import java.io.*;
import org.apache.struts.upload.*;
import com.chinacannel.entity.Image;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
import java.util.Date;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;
import javax.servlet.ServletRequest;
public class ImageUpload {
    private static Log log = LogFactory.getLog(ImageUpload.class);
    public ImageUpload() {
    }
    public Image saveImage(FormFile file, ServletRequest servletRequest) {
        return this.saveImage(file, servletRequest, true);
    }
    public Image saveImage(FormFile file,ServletRequest servletRequest,boolean createThumbnail) {
        if(file==null){
            return null;
        }
        InputStream stream = null;
        OutputStream bos = null;
        try {
            stream = file.getInputStream(); //把文件读入
            String path = servletRequest.getRealPath("/"); //取当前系统路径
            //         String filePath = path + file.getFileName();
            path += Params.getImgPath();
            String fileName = file.getFileName();
            Date d = new Date();
            String nFileName = String.valueOf(d.getTime()) + fileName;
            bos = new FileOutputStream(path + nFileName, true); //建立一个上传文件的输出流
            log.info("-------saveImage--------->"+path+nFileName);
            int bytesRead = 0;
            byte[] buffer = new byte[8192];
            while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
                bos.write(buffer, 0, bytesRead); //将文件写入服务器
            }
            String breFileName = "";
            if(createThumbnail){
                breFileName = this.CreateThumbnail(nFileName, servletRequest);
            }
           return this.saveToDB(fileName, nFileName, Params.getImgPath(), breFileName,
                          Params.getThumbnailPath());
        } catch (FileNotFoundException e) {
            log.error(e.getMessage(), e);
            return null;
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
            return null;
        } finally {
            try {
                bos.close();
                stream.close();
            } catch (Exception ex1) {
                log.error(ex1.getMessage(), ex1);
            }
        }
    }
    protected String CreateThumbnail(String fileName,ServletRequest servletRequest) throws
            Exception {
        String path = servletRequest.getRealPath("/")+Params.getImgPath();
        log.info("------CreateThumbnail---------->"+path);
        File f = new File(path + fileName);
        BufferedImage bi = null;
        try {
            bi = ImageIO.read(f);
        } catch (IOException ex2) {
            throw new IOException(ex2.getMessage());
        }
        String fn = "";
        FileOutputStream out = null;
        String[] s = this.splitFileName(fileName);
        String name = s[0];
        String ext = s[1];
        if ("jpg".equals(ext) || "jpeg".equals(ext)) {
            fn = name + "Bre." + ext;
        } else {
            fn = name + "Bre.png";
        }
        int nw = bi.getWidth() / 2;
        int nh = bi.getHeight() / 2;
        BufferedImage tag = new BufferedImage(nw, nh,
                                              BufferedImage.TYPE_INT_RGB);
        tag.getGraphics().drawImage(bi, 0, 0, nw, nh, null); //绘制缩小后的图
        try {
            out = new FileOutputStream(servletRequest.getRealPath("/")+Params.getThumbnailPath() + fn); //输出到文件流
            JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
            encoder.encode(tag); //近JPEG编码
            out.close();
        } catch(Exception ex){
            log.error(ex.getMessage(), ex);
        }
        finally {
            out.close();
        }
        return fn;
    }
    protected String[] splitFileName(String fileName) {
        int a = fileName.lastIndexOf(".");
        String[] r = new String[2];
        r[0] = fileName.substring(0, a);
        r[1] = fileName.substring(a + 1);
        return r;
    }
    protected Image saveToDB(String fileName, String reallyName, String path,
                        String ThumbnailName, String ThumbnailPath) {
        CommonDAO dao = new CommonDAO();
        Image img = new Image();
        img.setFilename(fileName);
        img.setReallyname(reallyName);
        img.setPath(path);
        img.setThumbnailname(ThumbnailName);
        img.setThumbnailpath(ThumbnailPath);
        try {
            dao.createObject(img);
            return img;
        } catch (DAOException ex) {
            log.error(ex.getMessage(), ex);
            return null;
        }
    }
    public void deleteImage(int imgId){
        CommonDAO dao = new CommonDAO();
        Image image=null;
        try {
            image=(Image)dao.loadObject(new Long(imgId), Image.class);
            dao.removeObject(image);
            this.deleteFile(image);
        } catch (DAOException ex) {
            log.error(ex.getMessage(), ex);
        }
    }
    protected void deleteFile(Image img){
        if(img==null){
            return;
        }
        try {
            String imgName = img.getPath() + img.getFilename();
            String imgThumbnailName = img.getThumbnailpath() +
                                      img.getThumbnailname();
            File file = new File(imgName);
            File thumbnailFile = new File(imgThumbnailName);
            file.delete();
            thumbnailFile.delete();
        } catch (Exception ex) {
            log.error(ex.getMessage(), ex);
        }
    }
}

						