关于fileupload的文件上传

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package com.insigma.siis.local.pagemodel.tablesmanage;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.URLEncoder;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.hibernate.Query;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.PageContext;
import javax.swing.JOptionPane;

import net.sf.json.JSONObject;



import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.FileUploadBase.FileSizeLimitExceededException;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.jasper.tagplugins.jstl.core.Out;
import org.apache.log4j.Logger;
import com.insigma.odin.framework.AppException;
import com.insigma.odin.framework.persistence.HBSession;
import com.insigma.odin.framework.persistence.HBUtil;
import com.insigma.odin.framework.sys.file.CommonsFileUploadImp;
import com.insigma.odin.framework.sys.file.FileUpload;
import com.insigma.odin.framework.sys.file.FileUploadAccess;
import com.insigma.odin.taglib.html.SysParamTag;
import com.insigma.siis.local.business.entity.DataUpload;
import com.insigma.siis.local.pagemodel.fileupload.DataUploadPageModel;



/**
 * 文件导入通用Servlet类
 * @author jinwei
 * @date 2009-12-15
 */
public class FileUploadServlet extends HttpServlet {
    /**
     * Logger for this class
     */
    private static final Logger logger = Logger.getLogger(FileUploadServlet.class);

    private String defaultBusinessName = "com.insigma.odin.framework.sys.file.DefaultFileUploadAccess";

    public FileUploadServlet() {
        super();
    }


    public void destroy() {
        super.destroy(); 
    }


    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        doPost(request,response);
    }

    public void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {    
        String method = request.getParameter("method");
        if(method.equals("impFileAndProcess")){
            impFileAndProcess(request,response);               
        }
        
        if(method.equals("dataUpload")){
            System.out.println("zheli");
            dataUpload(request,response);               
        }
        
    }

    public void init() throws ServletException {
        
    }
    
    /**
     * 导入文件，并做相关业务处理(不对Txt、Excel自动进行解析处理)
     * @param request
     * @param response
     * @throws IOException
     */
    public void impFileAndProcess(HttpServletRequest request, HttpServletResponse response) throws IOException{        
        response.setContentType("text/html");
        response.setCharacterEncoding("GBK");
        PrintWriter out = response.getWriter();
        try {
            Map<?, ?> map;   
            FileUpload upload = new CommonsFileUploadImp();//FileUpload upload = new FileUploadImp();
            String path = getServletContext().getRealPath("/");
            map = upload.upload(request,response,this.getServletConfig(),Integer.MAX_VALUE,path);
            Boolean bool = (Boolean) map.get("result");             
            List<?> list = (List<?>) map.get("filePath");
            List<?> fileNames = (List<?>) map.get("fileName");
            String className = (String)map.get("businessClass");
            String fileid = (String)map.get("fileid");
            if(className==null || className.equals("")){
                className = defaultBusinessName; 
            }
            /********调用业务处理类***********/
            FileUploadAccess fileAccess = (FileUploadAccess)Class.forName(className).newInstance(); 
            Object rtn = fileAccess.accessAfterFileUpload((String)fileNames.get(0)+"_"+fileid, (String)list.get(0),map);
            if(bool.booleanValue()){
                out.println("<script>parent.info(1,'"+JSONObject.fromObject(rtn).toString()+"kjdfhfhfhhf"+"');</script>");
            }else{
                out.println("<script>parent.parent.odin.info('业务操作失败！网络发生异常导致文件无法正常传输。');parent.info(0);</script>");
            }
        } catch (AppException e) {
            logger.info("业务处理发生异常！"+e.toString());
            out.println("<script>parent.parent.odin.info('"+e.toString()+"');parent.info(0);</script>");
            e.printStackTrace();
        } catch (Exception e) {
            logger.info("调用业务类异常！"+e.toString());
            out.println("<script>parent.parent.odin.info('"+e.toString()+"');parent.info(0);</script>");
            e.printStackTrace();
        }
        out.flush();                                                     
        out.close();
    }
    
    public String getDefaultBusinessName() {
        return defaultBusinessName;
    }


    public void setDefaultBusinessName(String defaultBusinessName) {
        this.defaultBusinessName = defaultBusinessName;
    }
    
    /**
     * @author leon
     * 资料上传的方法
     * @throws IOException 
     * @throws FileUploadException 
     */
    public void dataUpload(HttpServletRequest request, HttpServletResponse response) throws IOException{
        String scategory =  request.getParameter("category");
        int category = Integer.parseInt(scategory);
        String shcode =  request.getParameter("hcode");
        int hcode = Integer.parseInt(shcode);
        response.setContentType("text/html;charset=GBK");
        String[] allowedExt = new String[] { "jpg", "jpeg", "gif", "xls","doc", "docx", "mp3", "wma", "m4a" };  
        System.out.println("开始上传");
        PrintWriter out = response.getWriter();
        DiskFileItemFactory factory = new DiskFileItemFactory();
        //String path = getServletContext().getRealPath("/");
        String path = this.getServletConfig().getServletContext().getRealPath("/"); 
        String temp = getServletContext().getRealPath("/") + "upload/temp";   //文件上传临时存储位置
        factory.setRepository(new File(temp));
        ServletFileUpload upload = new ServletFileUpload(factory);
        upload.setFileSizeMax(10*1024*1024);
        
        
        
            List<FileItem> items = null;
            try {
                items = upload.parseRequest(request);
            } catch (FileUploadException  e1) {
                if(e1 instanceof FileSizeLimitExceededException){
                    out.print("<script>alert('文件上传尺寸超过指定大小');</script>");
                    return;
                }
                e1.printStackTrace();
            }
            
            for(FileItem fi:items){
                if(!fi.isFormField()){
                    try {
                        System.out.println("上传文件的大小:" + fi.getSize());
                        System.out.println("上传文件的类型:" + fi.getContentType());
                        // item.getName()返回上传文件在客户端的完整路径名称
                        
                        
                       
                        //得到文件后缀名
                        String name = fi.getName();
                        HBSession hb = HBUtil.getHBSession();
                        String sql = "select * from net_ae22 where name='"+name+"' and category="+category+"and flag=1 and fid="+hcode;
                        System.out.println(sql);
                        List list = hb.createSQLQuery(sql).list();
                        if(list.size() > 0){
                            out.print("<script>alert('该文件已经上传，请确认。确认要上传，请修改文件名');" +
                                    "</script>");
                            return;
                        }

                        String type= null;
                        if(name.length() > 0 && name != null){
                            int dot = name.lastIndexOf(".");
                            if((dot > -1)&&(dot < name.length()-1)){
                                type=name.substring(dot+1);
                            }
                        }
                        System.out.println("上传文件的名称:" + type);
                        int allowFlag = 0;
                        for(;allowFlag < allowedExt.length; allowFlag++){
                            if(allowedExt[allowFlag].toLowerCase().equals(type.toLowerCase())){
                                break;
                            }
                        }
                        if(allowFlag == allowedExt.length){
                            out.print("<script>alert('请上传doc,xls,jpg文件');</script>");  
                            /*for (allowFlag = 0; allowFlag < allowedExt.length; allowFlag++)  
                                out.println("*." + allowedExt[allowFlag].toLowerCase()  
                                        + "&nbsp;&nbsp;&nbsp;"); */
                            return;
                        }
                        
                        
                        fi.write(new File(path+"/download",fi.getName()));
                        
                        
                        DataUpload du = new DataUpload();
                        du.setId( System.currentTimeMillis());
                        du.setName(fi.getName());
                        du.setType(type);
                        du.setPath(path+"download\\" + fi.getName());
                        du.setFlag(1);
                        du.setFid(hcode);
                        du.setCategory(category);
                        System.out.println(du.getPath());
                        hb.save(du);
                        hb.flush();
                        
                        
                        out.print("<script>alert('恭喜你，上传成功');" +
                                "parent.parent.location.reload();" +
                                "</script>");
                        //request.getRequestDispatcher("DataUpload.jsp");
                        System.out.println("上传结束");
                        
                    } catch (Exception e) {
                        e.printStackTrace();
                        System.out.println("上传出错了");
                    }
                }
            }
    
    }
    
    /**
     * 
     * 
     * 
     */
    public HttpServletResponse download(String path,HttpServletRequest request, HttpServletResponse response) {
        try {
            // path是指欲下载的文件的路径。
            File file = new File(request.getRealPath("/")+"/"+path);
            // 取得文件名。
            String filename = file.getName();
            // 取得文件的后缀名。
            //String ext = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase();

            // 以流的形式下载文件。
            InputStream fis = new BufferedInputStream(new FileInputStream(file));
            byte[] buffer = new byte[fis.available()];
            fis.read(buffer);
            fis.close();
            // 清空response
            response.reset();
            // 设置response的Header
            response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("utf-8"),"ISO-8859-1"));
            response.addHeader("Content-Length", "" + file.length());
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream");
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
        return response;
    }
}