spring上传文件

通过spring上传文件示例：

package edu.qlnu.mxj.action;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.struts2.ServletActionContext;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
import com.opensymphony.xwork2.ActionContext;
import edu.qlnu.mxj.service.HomeworkService;
import edu.qlnu.mxj.service.StaffService;

@SuppressWarnings("serial")
public class UploadAction extends BaseAction {
    private String hwNo;
    private String hwName;
    private String mes;
    private String author;
    private HomeworkService homeworkService;
    private StaffService staffService;
    
    public StaffService getStaffService() {
        return staffService;
    }

    public void setStaffService(StaffService staffService) {
        this.staffService = staffService;
    }

    public String getHwNo() {
        return hwNo;
    }

    public void setHwNo(String hwNo) {
        this.hwNo = hwNo;
    }

    public String getHwName() {
        return hwName;
    }

    public void setHwName(String hwName) {
        this.hwName = hwName;
    }

    public String getMes() {
        return mes;
    }

    public void setMes(String mes) {
        this.mes = mes;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public HomeworkService getHomeworkService() {
        return homeworkService;
    }

    public void setHomeworkService(HomeworkService homeworkService) {
        this.homeworkService = homeworkService;
    }

    public String uploadFile() {										System.out.println("1");
        HttpServletRequest request = ServletActionContext.getRequest();
//		HttpServletResponse response = ServletActionContext.getResponse();
        DiskFileItemFactory factory = new DiskFileItemFactory();		System.out.println("1");
        @SuppressWarnings("deprecation")
        String path = request.getRealPath("/upload");// 设置磁盘缓冲路径

        factory.setRepository(new File(path));					System.out.println("1");
        factory.setSizeThreshold(1024 * 1024);// 设置创建缓冲大小

        ServletFileUpload upload = new ServletFileUpload(factory);System.out.println("1");
        upload.setSizeMax(-1);// 设置上传文件限制大小,-1无上限
        try {														System.out.println("1");
            List<FileItem> list = upload.parseRequest(request);System.out.println("1");
            for (FileItem item : list) {
                // String name = item.getFieldName();
                if (item.isFormField()) {// 判断是否是文件流

                    item.getString("UTF-8");						System.out.println("1");
                } else {
                    String value = item.getName();// 会将完整路径名传过来
                    int start = value.lastIndexOf("\\");						System.out.println("1");
                    value.substring(start + 1);
                    InputStream in = item.getInputStream();						System.out.println("1");

                    FileOutputStream fos = new FileOutputStream(displayTime() + ".zip");System.out.println("1");
                    byte[] b = new byte[1024];
                    while ((in.read(b)) != -1) {
                        fos.write(b);
                    }
                    in.close();
                    fos.close();
                    System.out.println("upload success!");
                }
            }
        } catch (Exception e) {

            e.printStackTrace();
        }
        return "upload";
    }

    @SuppressWarnings("unchecked")
    public String upload2() throws IllegalStateException, IOException{   
    	HttpServletRequest request = ServletActionContext.getRequest();
        CommonsMultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext()); 
        

//        MultipartResolver resolver = new CommonsMultipartResolver(request.getSession().getServletContext());
        MultipartHttpServletRequest multiRequest = resolver.resolveMultipart(request);
        
        String hwName = multiRequest.getParameter("hwName");
        String hwNo = multiRequest.getParameter("hwNo");
        String mes = multiRequest.getParameter("mes");
        String author = multiRequest.getParameter("author");
        System.out.println(hwName+hwNo+mes+author);
        //判断是否是文件  
        if(resolver.isMultipart(request)){ 								 
            //进行转换  
//            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)(request); 
            //获取所有文件名称  
            Iterator<String> it = multiRequest.getFileNames();   System.out.println("222"+multiRequest.getFileNames().hasNext());
            while(it.hasNext()){  System.out.println("666");
                //根据文件名称取文件  
                MultipartFile file = multiRequest.getFile(it.next());  
                String fileName = file.getOriginalFilename(); System.out.println(fileName);
                String localPath = "/upload/" + fileName;  System.out.println(localPath);
                File newFile = new File(localPath);  
                //上传的文件写入到指定的文件中  
                file.transferTo(newFile);  
            }
            ActionContext.getContext().getSession().put("mes", "上传成功！");
        }else {
        	ActionContext.getContext().getSession().remove("mes");
        } 
        return "upload";
    }  
    
    public String displayTime() {
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String date = df.format(new Date());
        return date;
    }
}