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";
@Override
public 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
@Override
public 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"%>
上传 & 下载
文件标题：
选择文件：
上传：
200000
fileSavePath
/WEB-INF/content/jsp/success.jsp
/file.jsp
fileSavePath
targetFile
attachment;filename=${filename}
200000
10820171017
Struts2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]
