strtus2文件上传与下载

10820171017

package com.tiger.upload;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;import java.net.URLEncoder;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * 文件下载Action * 此action返回一个InputStream对象 * 自定义一个方法(下载文件入口输入流，必须将此方法名注入到InputName属性中) * @author tiger * @time 2017年10月17日 */public class FileDownLoadAction extends ActionSupport{private String downPath;//下载路径private String filename;//下载文件名private String preFilename = "eeeeeee.txt";@Overridepublic String execute() throws Exception {//设置编码格式setFilename(URLEncoder.encode(preFilename,"UTF-8"));return SUCCESS;}/** * 下载文件的入口方法 * @return */public InputStream getTargetFile() {FileInputStream fis = null;try {fis = new FileInputStream(getDownPath()+File.separator+preFilename);} catch (FileNotFoundException e) {e.printStackTrace();}System.out.println("下载成功,下载路径 = " + getDownPath());return fis;//return ServletActionContext.getServletContext().getResourceAsStream(getDownPath()+preFilename);}public String getDownPath() {return ServletActionContext.getServletContext().getRealPath("/WEB-INF/" + downPath);}public void setDownPath(String downPath) {this.downPath = downPath;}public String getFilename() {return filename;}public void setFilename(String filename) {this.filename = filename;}}package com.tiger.upload;import java.io.*;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionSupport;/** * 文件上传action * @author tiger * @time 2017年10月17日 */public class FileUploadAction extends ActionSupport{private static final long serialVersionUID = 1L;private File upload;   //文件对象(名字必须这样)private String uploadContentType;  //文件类型(名字必须这样)private String uploadFileName; //文件名(名字必须这样)private String title; //文件标题private String upPath; //文件上传保存路径@Overridepublic String execute() throws Exception {FileInputStream fis = new FileInputStream(getUpload());FileOutputStream fos = new FileOutputStream(getUploadFolder()+File.separator+getUploadFileName());int len = 0;byte[] buff = new byte[1024];while ((len = fis.read(buff)) != -1) {fos.write(buff, 0, len);}fos.flush();fos.close();fis.close();System.out.println("上传成功");return SUCCESS;}/** * 获取文件上传路径 * @return */private String getUploadFolder() {String uploadFolder = getUpPath();File file = new File(uploadFolder);if (!file.exists()) {file.mkdirs();}return uploadFolder;}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 String getTitle() {return title;}public void setTitle(String title) {this.title = title;}public String getUpPath() {return ServletActionContext.getServletContext().getRealPath("/WEB-INF/"+upPath);}public void setUpPath(String upPath) {this.upPath = upPath;}}<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%>
文件标题：
选择文件：
上传：
200000fileSavePath/WEB-INF/content/jsp/success.jsp/file.jspfileSavePathtargetFileattachment;filename=${filename}20000010820171017Struts2文件上传 & 下载1、文件上传   1)、加载 commons-fileupload.jar（默认）[另外还有cos、pell ,配置struts.multipart.parser=jakarta]   2)、表单提交数据类型必须是 multipart/form-data ,提交方式必须是 post   3)、编写Action类[下边三个属性名必须是那样]File upload;          //上传文件对象String uploadContentType; //获取上传文件的类型String uploadFileName; //获取文件名2、文件下载   1)、编写下载文件输入流的入口方法 getTargetFile();[此方法在strtus.xml中配置 inputName 使必须一致]