Struts2上传文件出错

【文件属性】：
文件名称：Struts2上传文件出错
文件大小：870B
文件格式：XML
更新时间：2015-12-06 09:22:55
java struts2 <!-- 系统常量定义，定义上传文件字符集编码 --> <!-- 系统常量定义，定义上传文件临时存放路径 --> <!-- Action所在包定义 --> <!-- Action名字，类以及导航页面定义 --> <!-- 通过Action类处理才导航的的Action定义 --> /upload.jsp /input.jsp package com.aptech.action; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.List; import org.apache.struts2.ServletActionContext; import com.opensymphony.xwork2.ActionSupport; public class UploadAction extends ActionSupport { // 上传文件存放路径 private final static String UPLOADDIR = "/upload"; // 上传文件集合 private List file; // 上传文件名集合 private List fileFileName; // 上传文件内容类型集合 private List fileContentType; public List getFile() { return file; } public void setFile(List file) { this.file = file; } public List getFileFileName() { return fileFileName; } public void setFileFileName(List fileFileName) { this.fileFileName = fileFileName; } public List getFileContentType() { return fileContentType; } public void setFileContentType(List fileContentType) { this.fileContentType = fileContentType; } public String execute() throws Exception { for (int i = 0; i < file.size(); i++) { // 循环上传每个文件 uploadFile(i); } return "input"; } // 执行上传功能 private void uploadFile(int i) throws FileNotFoundException, IOException { try { InputStream in = new FileInputStream(file.get(i)); String dir = ServletActionContext.getRequest().getRealPath( UPLOADDIR); File uploadFile = new File(dir, this.getFileFileName().get(i)); OutputStream out = new FileOutputStream(uploadFile); byte[] buffer = new byte[1024 * 1024]; int length; while ((length = in.read(buffer)) > 0) { out.write(buffer, 0, length); } in.close(); out.close(); } catch (FileNotFoundException ex) { ex.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); } } }