package zengxiaomeng;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.swing.ImageIcon;
import com.jspsmart.upload.*;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;
public class UploadServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private final static long FILE_MAX_SIZE=4000000;//设置允许上传文件的大小限制
private final static String FILE_EXTEND_NAME="jpg,JPG,gif,GIF,png,PNG";//设置允许上传文件的扩展名
private final static String UPLOAD_DIRECTORY="/upload/";//设置上传的路径
private String path; //上传的绝对路径
private ServletConfig config;
final public void init(ServletConfig config) throws ServletException {
this.config = config;
path=config.getServletContext().getRealPath(UPLOAD_DIRECTORY)+"/";
}
final public ServletConfig getServletConfig() {
return config;
}
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
//PrintWriter out = response.getWriter();
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=GBK");
//PrintWriter out = response.getWriter();
String filename=upload(config,request,response);
watermark(filename);//生成水印
reduce(filename);//生成缩略图
response.sendRedirect("/Test.htm");
}
public void destroy () {
}
//********************************附加的一些自定义方法********************************//
//上传文件
private String upload(ServletConfig config,HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {
//初始化上传组件
SmartUpload mySmartUpload=new SmartUpload();
mySmartUpload.initialize(config,request,response);
mySmartUpload.setAllowedFilesList(FILE_EXTEND_NAME);
mySmartUpload.setMaxFileSize(FILE_MAX_SIZE);
//上传文件
try{
mySmartUpload.upload();
//mySmartUpload.save(path);//注释掉此行将用原始文件名来保存
//以下三行代码利用Calendar对象生成一个随机毫秒数来作为新的文件名保存
com.jspsmart.upload.File myFile=mySmartUpload.getFiles().getFile(0);//返回刚刚上传的文件对象
String filename=String.valueOf(Calendar.getInstance().getTimeInMillis())+"."+myFile.getFileExt();//构造文件名
myFile.saveAs(path+filename,SmartUpload.SAVE_PHYSICAL);//保存文件为新的文件名
return filename;
}catch(Exception e){}
return "0";
}
//生成缩略图
private void reduce(String filename){
//设置新文件的宽和高
int tagImageWidth=102;
int tagImageHeight=120;
ImageIcon srcFile=new ImageIcon(path+filename);//读入源文件
Image srcImage =srcFile.getImage();//构造Image对象
BufferedImage tagImage = new BufferedImage(tagImageWidth,tagImageHeight,BufferedImage.TYPE_INT_RGB);//构造图像缓存对象
tagImage.getGraphics().drawImage(srcImage,0,0,tagImageWidth,tagImageHeight,null);//绘制缩小后的图
paint(tagImage,"s_"+filename);
}
//生成水印
private void watermark(String filename){
Color color=Color.RED;//前景色
Color backgroundColor=Color.WHITE;//背景色
String word="zengxiaomeng";//水印文字
String wartmarkfilename="fjsenlogo.jpg";//水印图片地址
int watermarkLocationX=100;
int watermarkLocationY=100;
int wordLocationX=100;
int wordLocationY=100;
ImageIcon srcFile=new ImageIcon(path+filename);//读入源文件
Image srcImage =srcFile.getImage();//构造Image对象
ImageIcon watermarkFile=new ImageIcon(path+wartmarkfilename);//读入水印文件
Image watermarkImage =watermarkFile.getImage();//构造水印图片对象
BufferedImage tagImage=new BufferedImage(srcImage.getWidth(null),srcImage.getHeight(null), BufferedImage.TYPE_INT_RGB);//构造图像缓存对象
Graphics2D g=tagImage.createGraphics( );
g.setColor(color);//设置绘图笔的前景色
g.setBackground(backgroundColor);//设置绘图笔的背景色
g.drawImage(srcImage, 0, 0, null );//先绘制源图
g.drawImage(watermarkImage, watermarkLocationX,watermarkLocationY, null ); //添加水印图片
g.drawString(word,wordLocationX,wordLocationY); //添加文字
g.dispose();
paint(tagImage,filename);
}
private void paint(BufferedImage tagImage,String tagFilename){
try{
FileOutputStream tagFile=new FileOutputStream(path+tagFilename);
JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(tagFile);
JPEGEncodeParam param=encoder.getDefaultJPEGEncodeParam(tagImage);
param.setQuality(50f, true);
encoder.encode(tagImage, param);
tagFile.close();
}catch(Exception e){}
}
}