fileupaction.java

strturs2 有关上传与下载的项目 大家可以看看

package com.action;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.Random;

import org.apache.struts2.ServletActionContext;

import com.model.TFile;
import com.opensymphony.xwork2.ActionSupport;
import com.service.FileService;

public class FileUpAction extends ActionSupport {

	/**
	 * 文件上传以及列表显示，删除操作
	 */
	private static final long serialVersionUID = 1L;
	private static final int BUFFER_SIZE = 16 * 1024;
	protected FileService fileService;
	List fileList;
	private int id;
	//要上传的文件
	private File[] upload;
	//由struts2获得的文件名
	private String[] uploadFileName;
	//由struts2获得的文件类型
	private String[] uploadContentType;
	//保存路径
	private String filePath;
	//文件备注
	private String[] fileRemark;
	//上传者
	private String[] fileAuthor;
	//从数据库读出的文件名，注意和uploadFileName的区别
	private String fileName;
	//上传时间
	private Date updateTime;
	
	public void setFileService(FileService fileService) {
		this.fileService = fileService;
	}
	
	public File[] getUpload() {
		return upload;
	}

	public void setUpload(File[] upload) {
		this.upload = upload;
	}

	public String[] getUploadFileName() {
		return uploadFileName;
	}

	public void setUploadFileName(String[] uploadFileName) {
		this.uploadFileName = uploadFileName;
	}

	public String[] getUploadContentType() {
		return uploadContentType;
	}

	public void setUploadContentType(String[] uploadContentType) {
		this.uploadContentType = uploadContentType;
	}

	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getFileName() {
		return fileName;
	}
	public void setFileName(String fileName) {
		this.fileName = fileName;
	}
	
	public String getFilePath() {
		return filePath;
	}
	public void setFilePath(String filePath) {
		this.filePath = filePath;
	}
	
	public String[] getFileRemark() {
		return fileRemark;
	}

	public void setFileRemark(String[] fileRemark) {
		this.fileRemark = fileRemark;
	}

	public String[] getFileAuthor() {
		return fileAuthor;
	}

	public void setFileAuthor(String[] fileAuthor) {
		this.fileAuthor = fileAuthor;
	}

	public Date getUpdateTime() {
		return updateTime;
	}
	public void setUpdateTime(Date updateTime) {
		this.updateTime = updateTime;
	}	
	
	public List getFileList() {
		return fileList;
	}

	public void setFileList(List fileList) {
		this.fileList = fileList;
	}
	/**
	 * 复制文件方法
	 */
	private static void copy(File src, File dst) {
		   try {
		    InputStream in = null;
		    OutputStream out = null;
		    try {
		     in = new BufferedInputStream(new FileInputStream(src),BUFFER_SIZE);
		     out = new BufferedOutputStream(new FileOutputStream(dst),BUFFER_SIZE);
		     byte[] buffer = new byte[BUFFER_SIZE];
		     while (in.read(buffer) > 0) {
		      out.write(buffer);
		     }
		    } finally {
		     if (null != in) {
		      in.close();
		     }
		     if (null != out) {
		      out.close();
		     }
		    }
		   } catch (Exception e) {
		    e.printStackTrace();
		   }
		}
	/**
	 * 上传多个文件action
	 */
	public String  upload(){
		for (int i = 0; i < this.getUpload().length; i++) {
			String dstPath=ServletActionContext.getServletContext()
		      		.getRealPath(this.getFilePath()) + "\\";
			String targetFileName = generateFileName(uploadFileName[i]);
			File dstFile = new File(dstPath,targetFileName);
			copy(this.getUpload()[i], dstFile);
			String targetPath=dstPath+targetFileName;
			fileService.save(uploadFileName[i],targetFileName, targetPath, fileRemark[i], fileAuthor[i]);
		}
		return SUCCESS;
	}
	/**
	 * 列出所有文件
	 */
	public String getAllFiles(){
		this.fileList=fileService.getAllFile();
		return SUCCESS;
	}
	/**
	 * 根据ID删除文件和数据库中文件信息
	 */
	public String delete(){
		TFile tfile=fileService.findFileById(id);
		File delFile=new File(tfile.getFilePath());
		delFile.delete();
		fileService.deleteById(id);
		return SUCCESS;
	}
	/**
	 * 获得上传文件总数
	 */
	public int getCount(){
		int count=fileService.getFilesCount();
		return count;
	}
	/**
	 * 随机生成重命名文件名字
	 */
    public String generateFileName(String fileName)
    {
        String formatDate = new SimpleDateFormat("yyMMddHHmmss")
                .format(new Date());
        int random = new Random().nextInt(10000);
        int position = fileName.lastIndexOf(".");
        String extension = fileName.substring(position);
        return formatDate + random + extension;
    }

}