文件上传和删除

package cn.itcast.web.formbean.uploadfile;

import org.apache.struts.upload.FormFile;

import cn.itcast.web.formbean.BaseForm;

public class UploadfileForm extends BaseForm {
	private FormFile uploadfile;
	private Integer[] fileids;
	
	public Integer[] getFileids() {
		return fileids;
	}

	public void setFileids(Integer[] fileids) {
		this.fileids = fileids;
	}

	public FormFile getUploadfile() {
		return uploadfile;
	}

	public void setUploadfile(FormFile uploadfile) {
		this.uploadfile = uploadfile;
	}
	
}


package cn.itcast.web.action.uploadfile;

import java.util.LinkedHashMap;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.springframework.stereotype.Controller;

import cn.itcast.bean.PageView;
import cn.itcast.bean.uploadfile.UploadFile;
import cn.itcast.service.uploadfile.UploadFileService;
import cn.itcast.web.formbean.uploadfile.UploadfileForm;


@Controller("/control/uploadfile/list")
public class UploadFileAction extends Action {
	@Resource(name="uploadFileServiceBean")
	private UploadFileService uploadFileService;
	
	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {
		UploadfileForm formbean = (UploadfileForm) form;
		PageView<UploadFile> pageView = new PageView<UploadFile>(12, formbean.getPage());
		int firstindex = (pageView.getCurrentpage()-1)* pageView.getMaxresult();
		LinkedHashMap<String, String> orderby = new LinkedHashMap<String, String>();
		orderby.put("id", "desc");
		pageView.setQueryResult(uploadFileService.getScrollData(firstindex, 
				pageView.getMaxresult(), orderby));
		request.setAttribute("pageView", pageView);
		return mapping.findForward("list");
	}

}


package cn.itcast.service.uploadfile.impl;

import java.util.List;

import javax.persistence.Query;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import cn.itcast.bean.uploadfile.UploadFile;
import cn.itcast.service.base.DaoSupport;
import cn.itcast.service.uploadfile.UploadFileService;


@Service @Transactional
public class UploadFileServiceBean extends DaoSupport<UploadFile> implements UploadFileService {

	@SuppressWarnings("unchecked")
	public List<String> getFilepath(Integer[] ids){
		if(ids!=null && ids.length>0){
			StringBuffer jpql = new StringBuffer();
			for(int i=0; i<ids.length;i++){
				jpql.append('?').append((i+1)).append(',');
			}
			jpql.deleteCharAt(jpql.length()-1);
			Query query = em.createQuery("select o.filepath from UploadFile o where o.id in("+ jpql.toString()+ ")");
			for(int i=0; i<ids.length;i++){
				query.setParameter(i+1, ids[i]);
			}
			return query.getResultList();
		}
		return null;
	}
}




package cn.itcast.web.action.uploadfile;

import java.io.File;
import java.io.FileOutputStream;
import java.io.Serializable;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.UUID;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import org.springframework.stereotype.Controller;

import cn.itcast.bean.uploadfile.UploadFile;
import cn.itcast.service.uploadfile.UploadFileService;
import cn.itcast.utils.SiteUrl;
import cn.itcast.web.formbean.uploadfile.UploadfileForm;


@Controller("/control/uploadfile/manage")
public class UploadfileManageAction extends DispatchAction {
	@Resource(name="uploadFileServiceBean")
	private UploadFileService uploadFileService;
	
	/**
	 * 删除
	 */
	public ActionForward delete(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {		
		UploadfileForm formbean = (UploadfileForm) form;
		List<String> files = uploadFileService.getFilepath(formbean.getFileids());
		if(files!=null){
			for(String file : files){
				String realpath = request.getSession().getServletContext().getRealPath(file);
				File deletefile = new File(realpath);
				if(deletefile.exists()) deletefile.delete();
			}
			uploadFileService.delete((Serializable[])formbean.getFileids());
		}
		request.setAttribute("message", "文件删除成功");
		request.setAttribute("urladdress", SiteUrl.readUrl("control.uploadfile.list"));
		return mapping.findForward("message");
	}
	/**
	 * 上传界面
	 */
	public ActionForward uploadUI(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {		
		return mapping.findForward("upload");
	}
	
	/**
	 * 保存上传文件
	 */
	public ActionForward upload(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) throws Exception {
		UploadfileForm formbean = (UploadfileForm) form;
		if(formbean.getUploadfile()!=null && formbean.getUploadfile().getFileSize()>0){
			if(!UploadfileForm.validateFileType(formbean.getUploadfile())){
				request.setAttribute("message", "文件格式不正确,只允许上传图片/flash动画/word文件/exe文件/pdf文件/TxT文件/xls文件/ppt文件");
				return mapping.findForward("error");
			}
			String ext = UploadfileForm.getExt(formbean.getUploadfile());
			if(("gif".equals(ext) || "jpg".equals(ext) || "bmp".equals(ext) || "png".equals(ext))
					&& formbean.getUploadfile().getFileSize()>204800){
				request.setAttribute("message", "图片不能大于200K");
				return mapping.findForward("error");
			}
			SimpleDateFormat dateformat = new SimpleDateFormat("yyyy/MM/dd/HH");
			String pathdir = "/images/uploadfile/"+ dateformat.format(new Date());//构建文件保存的目录
			//得到图片保存目录的真实路径
			String realpathdir = request.getSession().getServletContext().getRealPath(pathdir);
			File savedir = new File(realpathdir);
			if(!savedir.exists()) savedir.mkdirs();//如果目录不存在就创建			
			String filename = UUID.randomUUID().toString()+ "."+ext;//构建文件名称
			FileOutputStream fileoutstream = new FileOutputStream(new File(realpathdir, filename));
			fileoutstream.write(formbean.getUploadfile().getFileData());
			fileoutstream.close();
			String path = pathdir+"/"+filename;
			UploadFile uploadfile = new UploadFile(path);
			uploadFileService.save(uploadfile);
			request.setAttribute("imagepath", uploadfile.getFilepath());			
			return mapping.findForward("uploadfinish");
		}else{
			request.setAttribute("error", "请上传文件");
		}
		return mapping.findForward("message");
	}
}