Struts文件上传

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上传单个文件：
范例： jsp代码

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><%@taglib uri="/struts-tags" prefix="s" %><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><form action = "login.action"  method="post" enctype="multipart/form-data">账号：<input type="text" name="name"><br>图片：<input type="file" name="photo"><br><input type="submit" value="提交"></form></body></html>

LoginAction代码：

package com.action;import java.io.File;public class LoginAction {    private String name;    private File photo;    private String photoFileName;    private String photoContentType;    public String execute(){        System.out.println(this.photoFileName);        System.out.println(this.photoContentType);        return "success";    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public File getPhoto() {        return photo;    }    public void setPhoto(File photo) {        this.photo = photo;    }    public String getPhotoFileName() {        return photoFileName;    }    public void setPhotoFileName(String photoFileName) {        this.photoFileName = photoFileName;    }    public String getPhotoContentType() {        return photoContentType;    }    public void setPhotoContentType(String photoContentType) {        this.photoContentType = photoContentType;    }}

此时，完成的功能，只是将文件上传到了一个临时目录中，如果要实现将文件保存到指定路径中，需要对临时目录中的文件进行操作,往往需要对临时文件进行复制操作。
将LoginAction 代码进行修改：

public String execute() throws Exception{        System.out.println(this.photoFileName);        System.out.println(this.photoContentType);        File destFile = new File("D:\\"+photoFileName);        FileUtils.copyFile(photo, destFile);        return "success";    }

通常上传路径不是指定别的盘符，而是跟着本项目去指定
File destFile = new File(ServletActionContext.getServletContext().getRealPath(“/upload/”+photoFileName));

上传多个文件，只需要将各种文件相关的属性改成数组形式：
LoginAction代码：

package com.action;import java.io.File;import java.io.IOException;import org.apache.commons.io.FileUtils;import org.apache.struts2.ServletActionContext;public class LoginAction {    private String name;    private File[] photo;    private String[] photoFileName;    private String[] photoContentType;    public String execute() throws Exception{        for(int i=0;i<photo.length;i++){            System.out.println(this.photoFileName);            System.out.println(this.photoContentType);            File destFile = new File(ServletActionContext.getServletContext().getRealPath("/upload/"+photoFileName[i]));            System.out.println(destFile);            FileUtils.copyFile(photo[i], destFile);        }        return "success";    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public File[] getPhoto() {        return photo;    }    public void setPhoto(File[] photo) {        this.photo = photo;    }    public String[] getPhotoFileName() {        return photoFileName;    }    public void setPhotoFileName(String[] photoFileName) {        this.photoFileName = photoFileName;    }    public String[] getPhotoContentType() {        return photoContentType;    }    public void setPhotoContentType(String[] photoContentType) {        this.photoContentType = photoContentType;    }}

index.jsp代码：

<%@ page language="java" contentType="text/html; charset=UTF-8"    pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><%@taglib uri="/struts-tags" prefix="s" %><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Insert title here</title></head><body><form action = "login.action"  method="post" enctype="multipart/form-data">账号：<input type="text" name="name"><br>图片：<input type="file" name="photo"><br>图片：<input type="file" name="photo"><br>图片：<input type="file" name="photo"><br><input type="submit" value="提交"></form></body></html>

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