图片上传servlet,apache-common

UploadServlet.java

/**
* 
* 文 件 名: UploadServlet.java<br/>
* 开发人员: @author Left<br/> 
* 邮 箱: <br/>
* 系统名称: <br/>
* 功能说明: <br/>
* 开发时间: 2012-6-18下午04:15:11<br/>
* 系统版本: @version 0.01<br/>
* 版权信息: Copyright © 2012-2012,Adzoner.com, All Rights Reserved<br/>
* 修改记录: [M+修改顺序号 修改时间 修改人员 修改原因]<br/>
*
*
*/ 

package com.roshan.utils;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.io.FileUtils;
import org.apache.commons.lang3.RandomStringUtils;
import org.json.simple.JSONObject;
import org.springframework.web.context.ContextLoader;

import com.roshan.utils.img.Multimedia;
import com.roshan.website.bean.Pictures;
import com.roshan.website.dao.impl.ArticleDao;
import com.roshan.website.dao.impl.ImageDao;
import com.roshan.website.service.img.ImageService;



/**
 * @author Z
 *
 */
public class UploadServlet extends HttpServlet {
    
    private static ImageDao imageDao = (ImageDao) ContextLoader.getCurrentWebApplicationContext().getBean("imageDao");

    /**
     * 
    * 函数功能∶创建文章的图片上传 <br/>
    * 说          明:  <br/>
    *             1. 文件上传到临时目录，返回临时目录URL。<br/>
    *             2. 创建文章提交文件URL，转移到/upload/用户ID/post/文章编号/xxxxx.png；保存绝对路径和URL
    *             3.临时文件保存路径为：/upload/temp/日期
    * 开发人员: @author Left <br/>
    * 创建时间:2012-6-18下午03:06:25 <br/>
    * 相关参数:<br/>
    *     @param request
    *     @param response
    *     @return<br/>
    * 修改记录∶ <br/>
     * @throws IOException 
    *
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws javax.servlet.ServletException, IOException {
        SysLogUtils.debug("I am in....");
        response.setContentType("text/json; charset=UTF-8");
        JSONObject json = new JSONObject();
        String name = RandomStringUtils.randomAlphanumeric(15);
        long maxSize = 1024 * 1024 * 5L;
        StringBuilder savePath = new StringBuilder(request.getSession().getServletContext().getRealPath("/") + "upload"+File.separator);
        StringBuilder saveUrl  =  new StringBuilder(ConfigFileLoader.getValue("CDN") + "/upload/"); 
//        ImageService is = new ImageService();
        
        /*
         * 1. 处理文件上传，把取得的文件上传到tmp目录。
         * 2. 将tmp目录的文件转存到upload/20120301    
         */
        
        DiskFileItemFactory fileItemFactory = new DiskFileItemFactory();
        fileItemFactory.setSizeThreshold((int)maxSize); // 1 MB
        fileItemFactory.setRepository(new File(System.getProperty("user.dir")));
        ServletFileUpload uploadHandler = new ServletFileUpload(fileItemFactory);
        
        
        List items;
        try {
            items = uploadHandler.parseRequest(request);

            Iterator itr = items.iterator();
        
            while (itr.hasNext()) {
                FileItem item = (FileItem) itr.next();
                if (item.isFormField()) {
                    
                }else{
                    
                    //1.1 文件大小判断
                    long size = item.getSize();
                    if(size > maxSize){
                        json.put("code", "-1");
                        json.put("msg", "上传文件大小非法");
                        response.getWriter().write(json.toJSONString());
                        return;
                    }
                    
                    //1.2 文件类型判断
                    String upName = item.getName();
                    String ext = upName.substring(upName.indexOf(".")+1).toUpperCase();
                    String FILEEXTS = "gif,jpg,jpeg,png,bmp,JPG,GIF,JPEG,PNG,BMP";
                    if(!FILEEXTS.contains(ext)){
                        json.put("code", "-1");
                        json.put("msg", "上传文件格式不合法");
                        response.getWriter().write(json.toJSONString());
                        return;
                    }
                    
                    
                    //1.3 生成新文件名
                    SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd");
                    String newFileFloder = format.format(new Date());
                    File x = new File(new StringBuffer(savePath).append("temp").toString());
                    if(!x.exists()){
                            FileUtils.forceMkdir(x);
                    }
                    
                    
                    File f = new File(new StringBuffer(savePath).append("temp").append(File.separator).toString(),name+"."+ext);
                    item.write(f);
                    
                    //1.4 将新文件储存为制定格式文件，（插入数据库中）
                    savePath.append(newFileFloder+File.separatorChar);
                    
                    saveUrl.append(newFileFloder+"/");
                    File fileDir = new File(savePath.toString());
                    if(!fileDir.exists()){
                        FileUtils.forceMkdir(fileDir);
                    }
                    
                    savePath.append(name);
                    saveUrl.append(name);
                    
                    StringBuilder large = new StringBuilder(savePath.toString()).append("_large.").append(ext);
                    StringBuilder mid = new StringBuilder(savePath.toString()).append("_mid.").append(ext);
                    StringBuilder small = new StringBuilder(savePath.toString()).append("_small.").append(ext);
                    
                    StringBuilder lurl = new StringBuilder(saveUrl.toString()).append("_large.").append(ext);
                    StringBuilder murl = new StringBuilder(saveUrl.toString()).append("_mid.").append(ext);
                    StringBuilder surl = new StringBuilder(saveUrl.toString()).append("_small.").append(ext);
                    
                    
                    int lheight = Multimedia.saveImage(f, new File(large.toString()), Constant.IMG_LARGE_WEIGHT, 0);
                    int mheight = Multimedia.saveImage(f, new File(mid.toString()), Constant.IMG_MID_WEIGHT, 0);
                    int sheight = Multimedia.saveImage(f, new File(small.toString()), Constant.IMG_SMALL_WEIGHT, 0);
                    
                    Pictures p = new Pictures();
                    p.setPath(murl.toString());
                    p.setBigpath(lurl.toString());
                    p.setHeight(mheight);
//                    is.insertImage(p);
//                    int pid = is.insertImage(p);
                    imageDao.insertImage(p);
                    
                    json.put("code", "1");
                    json.put("pid", ""+p.getPid());
                    json.put("lurl", lurl.toString());
                    json.put("murl", murl.toString());
                    json.put("surl", surl.toString());
                    SysLogUtils.debug("pid2:"+p.getPid());
                    SysLogUtils.debug("json2:"+json.toJSONString());
                    response.getWriter().write(json.toJSONString());
                    
                    
                }
                
            }
        } catch (FileUploadException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
   
    }
}