Struts文件上传详解编程语言

用两个包：一个是commons-fileupload-1.3.2.jar，另一个是commons-io-2.2.jar

jsp界面：

 %@ 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" 

 html 

 head 

 meta http-equiv="Content-Type" content="text/html; charset=utf-8" 

 title Insert title here /title 

 /head 

 body 

 form action="Shangchuan_add" method="post" enctype="multipart/form-data" 

 input type="file" name="file" br br 

 input type="submit" value="submit" 

 /form 

 /body 

 /html 

做Action。
三个成员：1.File file上传的文件 2.String fileFileName属性名 3.String fileContentType属性名
org.apache.commons.io.FileUtils.copyFile很简单。

sturts.xml配置文件,可在里面添加常量,修改文件上传的大小限制。就可以上传大文件了

 ?xml version="1.0" encoding="UTF-8" ? 

 !DOCTYPE struts PUBLIC 

 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 

 "http://struts.apache.org/dtds/struts-2.3.dtd" 

 struts 

 constant name="struts.enable.DynamicMethodInvocation" value="true" / 

 constant name="struts.devMode" value="true" / 

 constant name="struts.i18n.encoding" value="UTF-8" /constant 

 constant name="struts.ui.theme" value="simple" /constant 

 constant name="struts.multipart.maxSize" value="20971520" /constant !-- 修改限制上传文件大小，默认是2097152 -- 

 package name="default" namespace="/" extends="struts-default" 

 action name="*_*" method="{2}" 

 result 

 {1}_{2}.jsp 

 /result 

 /action 

 /package 

 include file="example.xml"/ 

 !-- Add packages here -- 

 /struts 

解决重命名问题

package com.itnba.maya.controller; 

import java.io.File; 

import java.io.IOException; 

import java.text.SimpleDateFormat; 

import java.util.Date; 

import org.apache.commons.io.FileUtils; 

import com.opensymphony.xwork2.ActionSupport; 

public class ShangchuanAction extends ActionSupport { 

 private File file; 

 private String fileFileName;//上传文件的名字 

 private String fileContentType;//上传文件的格式 


 public void setFileFileName(String fileFileName) { 

 this.fileFileName = fileFileName; 


 public void setFileContentType(String fileContentType) { 

 this.fileContentType = fileContentType; 


 public String add() throws IOException{ 

 //为了防止上传文件重名，在文件前面加上当前时间 

 long l=System.currentTimeMillis(); 

 Date date=new Date(l); 

 SimpleDateFormat sdf= new SimpleDateFormat("yyyyMMddhhmmssSSS");//精确到毫秒 

 String pre=sdf.format(date); 

 String fileName = pre+fileFileName; 

 File destFile = new File("d://"+fileName);//放到哪里的路径+文件名 

 FileUtils.copyFile(file, destFile); 

 return SUCCESS; 

}

上传完成

*************************************************************************************

多个文件同时上传，Action类里面三个成员定义成数组，用数组来接收

package com.itnba.maya.controller; 

import java.io.File; 

import java.io.IOException; 

import org.apache.commons.io.FileUtils; 

import com.opensymphony.xwork2.ActionSupport; 

public class ShangchuanduoAction extends ActionSupport { 

 private File[] file; 

 private String[] fileFileName; 

 private String[] fileContentType; 

 public File[] getFile() { 

 return file; 

 public void setFile(File[] file) { 

 this.file = file; 

 public String[] getFileFileName() { 

 return fileFileName; 

 public void setFileFileName(String[] fileFileName) { 

 this.fileFileName = fileFileName; 

 public String[] getFileContentType() { 

 return fileContentType; 

 public void setFileContentType(String[] fileContentType) { 

 this.fileContentType = fileContentType; 

 public String input(){ 

 return SUCCESS; 

 public String add() throws IOException{ 

 //遍历数组 

 for(int i=0;i file.length;i++){ 

 File item= file[i]; //取出每个File 

 if(item!=null){ 

 File temp = new File("d://"+fileFileName[i]);//去出每个的fileFileName 

 FileUtils.copyFile(item, temp); 

 return SUCCESS; 

}

jap页面：

 %@ 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" 

 html 

 head 

 meta http-equiv="Content-Type" content="text/html; charset=utf-8" 

 title Insert title here /title 

 /head 

 body 

 h1 多文件上传 /h1 

 form action="Shangchuanduo_add" method="post" enctype="multipart/form-data" 

附件1： input type="file" name="file" br 

附件2： input type="file" name="file" br 

附件3： input type="file" name="file" br 

附件4： input type="file" name="file" br 

附件5： input type="file" name="file" br br 

 input type="submit" value="submit" 

 /form 

 /body 

 /html 

上传成功

原创文章，作者：ItWorker，如若转载，请注明出处：https://blog.ytso.com/16994.html