struts2上传图片.doc

转载struts2上传图片实例原文地址：struts2上传图片实例作者：酷云1、页面代码代码:图片上传function upload()var ff = document.forms.imageForm;var img = ff.file.value;if(img=null | img=)alert(图片路径不允许为空！);return;ff.target=_top;ff.method=post;ff.submit();-上传图片：-2、action代码代码:import java.awt.AlphaComposite;import java.awt.Color;import java.awt.Font;import java.awt.Graphics2D;import java.awt.Image;import java.awt.geom.AffineTransform;import java.awt.image.AffineTransformOp;import java.awt.image.BufferedImage;import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.util.Date;import javax.imageio.ImageIO;import mons.logging.Log;import mons.logging.LogFactory;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;import com.sun.image.codec.jpeg.JPEGCodec;import com.sun.image.codec.jpeg.JPEGImageEncoder;public class ImageAction extends ActionSupport private static final long serialVersionUID = -8982586906724587883L;private Log log = LogFactory.getLog(getClass();private static final int BUFFER_SIZE = 16 * 1024;private static final String TEXT_TITLE = 文字水印;private static final String WATER_IMG_NAME = rzx.gif;/ 输入参数:上传过来的文件路径private File file;private String fileName;private String contentType;/ 输出参数private String imageFileName;/ 输出参数:原图保存路径private String ipath;/ 输出参数:缩略图保存路径private String imgPath;/ 输出参数private String json;public ImageAction() Overridepublic String execute() throws Exception return uploadImage();private String getExtention(String fileName) int pos = fileName.lastIndexOf(.);return fileName.substring(pos);private void copy(File src, File dist) throws Exception log.debug(src- + src);log.debug(dist- + dist);try InputStream in = null;OutputStream out = null;try in = new BufferedInputStream(new FileInputStream(src), BUFFER_SIZE);out = new BufferedOutputStream(new FileOutputStream(dist), BUFFER_SIZE);byte buf = new byteBUFFER_SIZE;while (in.read(buf) 0) out.write(buf);out.close();in.close(); catch (FileNotFoundException e) e.printStackTrace(); catch (IOException e) e.printStackTrace(); finally if (in != null)in.close();if (out != null)out.close(); catch (Exception e) e.printStackTrace();throw new Exception(e);public String uploadImage() throws Exception log.debug(file- + file);log.debug(file name- + fileName);imageFileName = new Date().getTime() + getExtention(fileName);/ 得到文件存放路径log.debug(imageFileName- + imageFileName);String dir = ServletActionContext.getServletContext().getRealPath(/UploadImages);File dirs = new File(dir);if (!dirs.exists()dirs.mkdir();/ 使用原来的文件名保存图片String path = dir + / + fileName;File imageFile = new File(path);copy(file, imageFile);/ 缩放zoom(imageFile);/ 给大图添加文字水印/ watermark(imageFile);/ 给大图添加图片水印，可以是gif或png格式imageWaterMark(imageFile);/ 创建子目录 得到添加水印后的图片的存储路径,子目录只能一级一级的建String dist = dir + /water;File outFile = new File(dist);if (!outFile.exists()outFile.mkdir();File sImgpath = new File(dist + / + fileName);/ 给小图添加文字水印/ watermark(sImgpath);/ 给小图添加图片水印，可以是gif或png格式imageWaterMark(sImgpath);/ 大图路径ipath = UploadImages/ + fileName;/ 小图路径imgPath = UploadImages/water/ + fileName;return SUCCESS;public void zoom(File imageFile) throws Exception log.debug(zoomimageFile- + imageFile);try / 缩略图存放路径File todir = new File(ServletActionContext.getServletContext().getRealPath(/UploadImages) + /water);if (!todir.exists() todir.mkdir();if (!imageFile.isFile()throw new Exception(imageFile + is not image file error in CreateThumbnail!);File sImg = new File(todir, fileName);BufferedImage Bi = ImageIO.read(imageFile);/ 假设图片宽 高 最大为130 80,使用默认缩略算法Image Itemp = Bi.getScaledInstance(130, 80, Bi.SCALE_DEFAULT);double Ratio = 0.0;if (Bi.getHeight() 130) | (Bi.getWidth() 80) if (Bi.getHeight() Bi.getWidth()Ratio = 80.0 / Bi.getHeight();elseRatio = 130.0 / Bi.getWidth();AffineTransformOp op = new AffineTransformOp(AffineTransform.getScaleInstance(Ratio, Ratio), null);Itemp = op.filter(Bi, null);ImageIO.write(BufferedImage) Itemp, jpg, sImg); catch (IOException e) e.printStackTrace();throw new Exception(e);public void watermark(File img) throws Exception log.debug(watermark file name- + img.getPath();try if (!img.exists() throw new IllegalArgumentException(file not found!);log.debug(watermarkimg- + img);/ 创建一个FileInputStream对象从源图片获取数据流FileInputStream sFile = new FileInputStream(img);/ 创建一个Image对象并以源图片数据流填充Image src = ImageIO.read(sFile);/ 得到源图宽int width = src.getWidth(null);/ 得到源图长int height = src.getHeight(null);/ 创建一个BufferedImage来作为图像操作容器BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);/ 创建一个绘图环境来进行绘制图象Graphics2D g = image.createGraphics();/ 将原图像数据流载入这个BufferedImagelog.debug(width: + width + height: + height);g.drawImage(src, 0, 0, width, height, null);/ 设定文本字体g.setFont(new Font(宋体, Font.BOLD, 28);String rand = TEXT_TITLE;/ 设定文本颜色g.setColor(Color.blue);/ 设置透明度g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f);/ 向BufferedImage写入文本字符,水印在图片上的坐标g.drawString(rand, width - (width - 20), height - (height - 60);/ 使更改生效g.dispose();/ 创建输出文件流FileOutputStream outi = new FileOutputStream(img);/ 创建JPEG编码对象JPEGImageEncoder encodera = JPEGCodec.createJPEGEncoder(outi);/ 对这个BufferedImage (image)进行JPEG编码encodera.encode(image);/ 关闭输出文件流outi.close();sFile.close(); catch (IOException e) e.printStackTrace();throw new Exception(e);public void imageWaterMark(File imgFile) throws Exception try / 目标文件Image src = ImageIO.read(imgFile);int wideth = src.getWidth(null);int height = src.getHeight(null);BufferedImage image = new BufferedImage(wideth, height, BufferedImage.TYPE_INT_RGB);Graphics2D g = image.createGraphics();g.drawImage(src, 0, 0, wideth, height, null);/ 水印文件 路径String waterImgPath = ServletActionContext.getServletContext().getRealPath(/UploadImages)+/+WATER_IMG_NAME;File waterFile = new File(waterImgPath);Image waterImg = ImageIO.read(waterFile);int w_wideth = waterImg.getWidth(null);int w_height = waterImg.getHeight(null);g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 0.5f);g.drawImage(waterImg, (wideth - w_wideth) / 2, (height - w_height) / 2, w_wideth, w_height, null);/ 水印文件结束g.dispose();FileOutputStream out = new File