本文实例为大家分享了struts2框架实现文件上传的方法，供大家参考，具体内容如下

struts2的配置过程

(1)在项目中加入jar包

(2)web.xml中filter(过滤器)的配置

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"

xsi:schemalocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

struts2

org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter

struts2

/*

(3)struts.xml配置文件的编写

xmlns="http://java.sun.com/xml/ns/javaee"

xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"

xsi:schemalocation="http://java.sun.com/xml/ns/javaee

http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

struts2

org.apache.struts2.dispatcher.ng.filter.strutsprepareandexecutefilter

struts2

/*

(4)action类的编写

package com.xmgc.sc.action;

import java.io.file;

import java.io.fileinputstream;

import java.io.fileoutputstream;

import java.io.ioexception;

import org.apache.struts2.servletactioncontext;

public class myuploadaction {

private string title;

private file upload;//与form表单中的file文件类型的名字是一样的

private string uploadcontenttype;//前缀必须要是上面的upload

private string uploadfilename;

public string gettitle() {

return title;

}

public void settitle(string title) {

this.title = title;

}

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 getsavepath() {

//servletcontext cxt=servletactioncontext.getservletcontext();

//string path=cxt.getrealpath("/");

//这个获取的path为：http://localhost:8080/sc

//上传以后变为e:\software\apache-tomcat-6.0.45\webapps\sc

return savepath;

}

public void setsavepath(string savepath) {

//e:\software\apache-tomcat-6.0.45\webapps\sc/myupload

this.savepath = servletactioncontext.getservletcontext().getrealpath("/myupload");

}*/

public string execute() throws ioexception{

system.out.println(title);//标题

system.out.println(uploadcontenttype);//准备上传的文件的文件类型

system.out.println(uploadfilename);//准备上传的文件的文件名,记住还有扩展名

system.out.println(upload);

string realpath=servletactioncontext.getservletcontext().getrealpath("/");

string path=realpath+"myupload/"+uploadfilename;

system.out.println(realpath);

system.out.println(path);

fileinputstream fis=new fileinputstream(upload);

fileoutputstream fos=new fileoutputstream(path);

byte[] bytes=new byte[1024];//定义一个1024大小的字节数组

int len=-1;//用来做标志位

while((len=fis.read(bytes))>0){

fos.write(bytes, 0, len);

}

return null;

}

}

(5)jsp页面的编写

文件名：

上传：

经过这次总结，感觉struts2框架下的单文件的上传还是非常简单的，只要获取要存储在什么地方的地址，再通过输入输出流，写到这个地址中去就行了。绝大部分工作，struts2已经帮我们做好了。

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