uploadbean.java

网上购物书店。包括购物车

package com.cric.onlineshop.util;

import java.io.*;

import java.text.SimpleDateFormat;
import java.util.*;

import javax.servlet.*;

import javax.servlet.http.*;

/**
 * 用法说明
 * @author fengjj
 * setObjectPath("path")方法设置上传文件路径
 * setSourceFile(request)方法传递HttpServletRequest
 * isUploadFile()判断是否上传了文件
 * getNewFileName()获得新文件名称存入数据库中
 * deleteFileExist(objectPath+oldfileName)删除原有文件
 */
public class UploadBean {
	
	  boolean isUploadFile=false;	//是否上传了文件
	  
	  private String sourceFileName=new String();	//原路径+文件名(含后缀)

	  private String suffix = new String();         //原文件后缀名

	  private String objectPath = "c:\\";            //目标文件目录

	  private String objectFileName = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date()); //目标文件名
	  
	  private String newFileName=new String();		//新文件名（含后缀），最后存入数据库的文件名

	  private ServletInputStream sis = null;             //输入流

	  private String description = new String();    //描述状态

	  private long size =10000*1024;                    //限制大小

	  private byte[] b = new byte[4096];                 //字节流存放数组

	  private boolean successful = true;

	  private Hashtable fields = new Hashtable();
	  
	  String sourceFile = new String();     //源文件名

	  public UploadBean() {

	  }

	 
	  public static void main(String[] args) {

		    System.out.println("Test OK");
	  }
	 
	  //删除已有图片
	  
	  public void deleteFileExist(String filePath){
		  try{
			  File file=new File(filePath);
			  if(file.exists()){
				  file.delete();
				  System.out.println(filePath+"文件已删除！");
			  }else{
				  System.out.println(filePath+"文件不存在，没有删除！");
			  }
		  }catch(Exception e){
			  e.printStackTrace();
		  }
		 
	  }
	  

	  //文件上传处理程序

	  public void setSourceFile(HttpServletRequest request) throws IOException {

	    sis = request.getInputStream();

	    int a = 0;

	    int k = 0;

	    String s = "";

	    while ( (a = sis.readLine(b, 0, b.length)) != -1) {

	      s = new String(b, 0, a);

	      if ( (k = s.indexOf("filename=")) != -1) {
	        s = s.substring(k + 10);
	        
	        //取得上传的文件路径+文件名
	        s=s.substring(0, s.indexOf("\""));
	        this.setSourceFileName(s);
	        
	        //获得上传文件后缀
	        k=s.lastIndexOf("\\");
	        s=s.substring(k+1);
	        k = s.lastIndexOf(".");
	        suffix=s.substring(k+1);
	        
	        //判断是否上传了文件
	        if(!"".equals(suffix)){
	        	this.setUploadFile(true);
	        }
	        
	        //获得新文件名
	        this.setNewFileName(objectFileName+"."+suffix);
	        
	        //生成新文件
	        transferFile(newFileName);

	      } else if ( (k = s.indexOf("name=")) != -1) {

	        // 普通表单输入元素，获取输入元素名字
	        String fieldName = s.substring(k+6, s.length()-3);

	        sis.readLine(b, 0, b.length);

	        StringBuffer fieldValue = new StringBuffer(b.length);

	        while ( (a = sis.readLine(b, 0, b.length)) != -1) {

	          s = new String(b, 0, a-2,request.getCharacterEncoding());

	          if ( (b[0] == 45) && (b[1] == 45) && (b[2] == 45) && (b[3] == 45) && (b[4] == 45)) {

	            break;

	          } else {

	            fieldValue.append(s);

	          }

	        }

	        fields.put(fieldName, fieldValue.toString());

	      }

	      if (!successful)

	        break;

	    }

	  }
	  
	  //上传文件转换
	  
	  private void transferFile(String objectFileName) {

	  try {
          File pathFile=new File(objectPath);
          if(!pathFile.exists())
          {
        	  pathFile.mkdirs();
          }
	      File newFile=new File(objectPath + objectFileName);
	
	      if(!newFile.exists())
	    	  newFile.createNewFile();
	      
	      FileOutputStream out = new FileOutputStream(objectPath + objectFileName);

	      int a = 0;

	      int k = 0;

	      long hastransfered = 0; //标示已经传输的字节数

	      String s = "";

	      while ( (a = sis.readLine(b, 0, b.length)) != -1) {

	        s = new String(b, 0, a);

	        if ( (k = s.indexOf("Content-Type:")) != -1) {

	          break;

	        }

	      }

	      sis.readLine(b, 0, b.length);

	      while ( (a = sis.readLine(b, 0, b.length)) != -1) {

	        s = new String(b, 0, a);

	        if ( (b[0] == 45) && (b[1] == 45) && (b[2] == 45) && (b[3] == 45) && (b[4] == 45)) {

	          break;

	        }

	        out.write(b, 0, a);

	        hastransfered += a;

	        if (hastransfered >= size) {

	          description = "ERR: The file " + sourceFileName +

	              " is too large to transfer. The whole process is interrupted.";

	          successful = false;

	          break;

	        }

	      }

	      if (successful) {

	        description = "Right: The file " + sourceFileName+

	            " has been transfered successfully.";

	      }

	      out.close();

	      

	    }

	    catch (IOException ioe) {

	      description = ioe.toString();

	    }

	  }
	  
	  //设置文件保存路径

	  public void setObjectPath(String objectPath) {

	    this.objectPath = objectPath;

	  }

	  //设置文件大小

	  public void setSize(long maxSize) {

	    this.size = maxSize;

	  }

	  //取得表单元素值

	  public String getFieldValue(String fieldName) {

	    if (fields == null || fieldName == null) {

	      return null;

	    }

	    return (String) fields.get(fieldName);

	  }
	  
	  //取得目标路径

	  public String getObjectPath() {

	    return objectPath;

	  }

	  //取得源文件名

	  public String getSourceFile() {

	    return sourceFile;

	  }

	  //取得目标文件名

	  public String getObjectFileName() {

	    return objectFileName;

	  }

	  //取得上传状态描述

	  public String getDescription() {

	    return description;

	  }

	  public void setObjectFileName(String objectFileName) {
		this.objectFileName = objectFileName;
	  }

		public String getSuffix() {
			return suffix;
		}
	
	
	
		public void setSuffix(String suffix) {
			this.suffix = suffix;
		}



		public String getSourceFileName() {
			return sourceFileName;
		}



		public void setSourceFileName(String sourceFileName) {
			this.sourceFileName = sourceFileName;
		}



		public boolean isUploadFile() {
			return isUploadFile;
		}



		public void setUploadFile(boolean isUploadFile) {
			this.isUploadFile = isUploadFile;
		}


		public String getNewFileName() {
			return newFileName;
		}


		public void setNewFileName(String newFileName) {
			this.newFileName = newFileName;
		}
	  
	  

	}