诸位大大给个上传图片拦截器代码

２.Action类package com.sterning;import java.io.File;import javax.servlet.ServletContext;import org.apache.commons.io.FileUtils;import org.apache.struts2.util.ServletContextAware;import com.opensymphony.xwork2.ActionSupport;public class StrutsFileUpload extends ActionSupport implements        ServletContextAware {    private File upload;// 实际上传文件    private String uploadContentType; // 文件的内容类型    private String uploadFileName; // 上传文件名    private String fileCaption;// 上传文件时的备注    private ServletContext context;    public String execute() throws Exception {        try {                        String targetDirectory = context.getRealPath("/upload");            String targetFileName = uploadFileName;            File target = new File(targetDirectory, targetFileName);            FileUtils.copyFile(upload, target);                                    setUploadFileName(target.getPath());//保存文件的存放路径        } catch (Exception e) {            addActionError(e.getMessage());            return INPUT;        }        return SUCCESS;    }    public String getFileCaption() {        return fileCaption;    }    public void setFileCaption(String fileCaption) {        this.fileCaption = fileCaption;    }    public File getUpload() {        return upload;    }    public void setUpload(File upload) {        this.upload = upload;    }    public String getUploadContentType() {        return uploadContentType;    }    public void setUploadContentType(String uploadContentType) {        this.uploadContentType = uploadContentType;    }    public String getUploadFileName() {        return uploadFileName;    }    public void setUploadFileName(String uploadFileName) {        this.uploadFileName = uploadFileName;    }    public void setServletContext(ServletContext context) {        this.context = context;    }}