struts2之单个与多个文件上传代码

通过3种方式模拟多个文件上传，效果如下所示

         

目录结构

 

新建action

第一种方式

package com.ljq.action;

import java.io.file;

import org.apache.commons.io.fileutils;
import org.apache.struts2.servletactioncontext;

import com.opensymphony.xwork2.actioncontext;
import com.opensymphony.xwork2.actionsupport;

@suppresswarnings("serial")
public class uploadaction extends actionsupport{
    
    private file[] image; //上传的文件
    private string[] imagefilename; //文件名称
    private string[] imagecontenttype; //文件类型

    public string execute() throws exception {
        servletactioncontext.getrequest().setcharacterencoding("utf-8");
        string realpath = servletactioncontext.getservletcontext().getrealpath("/images");
        system.out.println(realpath);
        if (image != null) {
            file savedir=new file(realpath);
            if(!savedir.getparentfile().exists())
                savedir.getparentfile().mkdirs();
            for(int i=0;i                file savefile = new file(savedir, imagefilename[i]);
                fileutils.copyfile(image[i], savefile);
            }
            actioncontext.getcontext().put("message", "文件上传成功");
        }
        return "success";
    }

    public file[] getimage() {
        return image;
    }

    public void setimage(file[] image) {
        this.image = image;
    }

    public string[] getimagecontenttype() {
        return imagecontenttype;
    }

    public void setimagecontenttype(string[] imagecontenttype) {
        this.imagecontenttype = imagecontenttype;
    }

    public string[] getimagefilename() {
        return imagefilename;
    }

    public void setimagefilename(string[] imagefilename) {
        this.imagefilename = imagefilename;
    }



    
}

                   

第二种方式

package com.ljq.action;

import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;

import org.apache.struts2.servletactioncontext;

import com.opensymphony.xwork2.actionsupport;
/**
 * 使用数组上传多个文件
 * 
 * @author ljq
 *
 */
@suppresswarnings("serial")
public class uploadaction2 extends actionsupport{
    private file[] image; //上传的文件
    private string[] imagefilename; //文件名称
    private string[] imagecontenttype; //文件类型
    private string savepath;

    @override
    public string execute() throws exception {
        servletactioncontext.getrequest().setcharacterencoding("utf-8");
        //取得需要上传的文件数组
        file[] files = getimage();
        if (files !=null && files.length > 0) {
            for (int i = 0; i < files.length; i++) {
                //建立上传文件的输出流, getimagefilename()[i]
                system.out.println(getsavepath() + "" + getimagefilename()[i]);
                fileoutputstream fos = new fileoutputstream(getsavepath() + "" + getimagefilename()[i]);
                //建立上传文件的输入流
                fileinputstream fis = new fileinputstream(files[i]);
                byte[] buffer = new byte[1024];
                int len = 0;
                while ((len=fis.read(buffer))>0) {
                    fos.write(buffer, 0, len);
                }
                fos.close();
                fis.close();
            }
        }
        return success;
    }

    public file[] getimage() {
        return image;
    }

    public void setimage(file[] image) {
        this.image = image;
    }

    public string[] getimagefilename() {
        return imagefilename;
    }

    public void setimagefilename(string[] imagefilename) {
        this.imagefilename = imagefilename;
    }

    public string[] getimagecontenttype() {
        return imagecontenttype;
    }

    public void setimagecontenttype(string[] imagecontenttype) {
        this.imagecontenttype = imagecontenttype;
    }

    /**
     * 返回上传文件保存的位置
     * 
     * @return
     * @throws exception
     */
    public string getsavepath() throws exception {
        return servletactioncontext.getservletcontext().getrealpath(savepath);
    }

    public void setsavepath(string savepath) {
        this.savepath = savepath;
    }
    
    
}

            

第三种方式

package com.ljq.action;

import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.util.list;

import org.apache.struts2.servletactioncontext;

import com.opensymphony.xwork2.actionsupport;

/**
 * 使用list上传多个文件
 * 
 * @author ljq
 *
 */
@suppresswarnings("serial")
public class uploadaction3 extends actionsupport {
    private list image; // 上传的文件
    private list imagefilename; // 文件名称
    private list imagecontenttype; // 文件类型
    private string savepath;

    @override
    public string execute() throws exception {
        servletactioncontext.getrequest().setcharacterencoding("utf-8");
        // 取得需要上传的文件数组
        list files = getimage();
        if (files != null && files.size() > 0) {
            for (int i = 0; i < files.size(); i++) {
                fileoutputstream fos = new fileoutputstream(getsavepath() + "" + getimagefilename().get(i));
                fileinputstream fis = new fileinputstream(files.get(i));
                byte[] buffer = new byte[1024];
                int len = 0;
                while ((len = fis.read(buffer)) > 0) {
                    fos.write(buffer, 0, len);
                }
                fis.close();
                fos.close();
            }
        }
        return success;
    }

    public list getimage() {
        return image;
    }

    public void setimage(list image) {
        this.image = image;
    }

    public list getimagefilename() {
        return imagefilename;
    }

    public void setimagefilename(list imagefilename) {
        this.imagefilename = imagefilename;
    }

    public list getimagecontenttype() {
        return imagecontenttype;
    }

    public void setimagecontenttype(list imagecontenttype) {
        this.imagecontenttype = imagecontenttype;
    }

    /**
     * 返回上传文件保存的位置
     * 
     * @return
     * @throws exception
     */
    public string getsavepath() throws exception {
        return servletactioncontext.getservletcontext().getrealpath(savepath);
    }

    public void setsavepath(string savepath) {
        this.savepath = savepath;
    }

}

              

struts.xml配置文件

    "-//apache software foundation//dtd struts configuration 2.0//en"
    "http://struts.apache.org/dtds/struts-2.0.dtd">


    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
        
            /web-inf/page/message.jsp教程
        
    
    
        
            
            /image
            /web-inf/page/message.jsp
        
    
    
        
            
            /image
            /web-inf/page/message.jsp
        
    

           

上传表单页面upload.jsp

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>



    
        

        
        
        
    

    
        
        
        
        
        

            文件1:

            文件2:

            文件3:

                
        
    

显示页面message.jsp

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>


  
    
    
    
    
    
        
  
  
  
    上传成功
  

  
  
 
单文件上传
过2种方式模拟单个文件上传，效果如下所示
开发步骤如下：
1、新建一个web工程，导入struts2上传文件所需jar，如下图
目录结构
            
2、新建action 
第一种方式
package com.ljq.action;

import java.io.file;

import org.apache.commons.io.fileutils;
import org.apache.struts2.servletactioncontext;

import com.opensymphony.xwork2.actioncontext;
import com.opensymphony.xwork2.actionsupport;

@suppresswarnings("serial")
public class uploadaction extends actionsupport{
    
    private file image; //上传的文件
    private string imagefilename; //文件名称
    private string imagecontenttype; //文件类型

    public string execute() throws exception {
        string realpath = servletactioncontext.getservletcontext().getrealpath("/images");
        //d:apache-tomcat-6.0.18webapps教程struts2_uploadimages
        system.out.println("realpath: "+realpath);
        if (image != null) {
            file savefile = new file(new file(realpath), imagefilename);
            if (!savefile.getparentfile().exists())
                savefile.getparentfile().mkdirs();
            fileutils.copyfile(image, savefile);
            actioncontext.getcontext().put("message", "文件上传成功");
        }
        return "success";
    }

    public file getimage() {
        return image;
    }

    public void setimage(file image) {
        this.image = image;
    }

    public string getimagefilename() {
        return imagefilename;
    }

    public void setimagefilename(string imagefilename) {
        this.imagefilename = imagefilename;
    }

    public string getimagecontenttype() {
        return imagecontenttype;
    }

    public void setimagecontenttype(string imagecontenttype) {
        this.imagecontenttype = imagecontenttype;
    }

    
}

            
第二种方式

package com.ljq.action;

import java.io.file;
import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.ioexception;

import org.apache.struts2.servletactioncontext;

import com.opensymphony.xwork2.actionsupport;

@suppresswarnings("serial")
public class uploadaction2 extends actionsupport {

    // 封装上传文件域的属性
    private file image;
    // 封装上传文件类型的属性
    private string imagecontenttype;
    // 封装上传文件名的属性
    private string imagefilename;
    // 接受依赖注入的属性
    private string savepath;

    @override
    public string execute() {
        fileoutputstream fos = null;
        fileinputstream fis = null;
        try {
            // 建立文件输出流
            system.out.println(getsavepath());
            fos = new fileoutputstream(getsavepath() + "" + getimagefilename());
            // 建立文件上传流
            fis = new fileinputstream(getimage());
            byte[] buffer = new byte[1024];
            int len = 0;
            while ((len = fis.read(buffer)) > 0) {
                fos.write(buffer, 0, len);
            }
        } catch (exception e) {
            system.out.println("文件上传失败");
            e.printstacktrace();
        } finally {
            close(fos, fis);
        }
        return success;
    }

    /**
     * 返回上传文件的保存位置
     * 
     * @return
     */
    public string getsavepath() throws exception{
        return servletactioncontext.getservletcontext().getrealpath(savepath); 
    }

    public void setsavepath(string savepath) {
        this.savepath = savepath;
    }

    public file getimage() {
        return image;
    }

    public void setimage(file image) {
        this.image = image;
    }

    public string getimagecontenttype() {
        return imagecontenttype;
    }

    public void setimagecontenttype(string imagecontenttype) {
        this.imagecontenttype = imagecontenttype;
    }

    public string getimagefilename() {
        return imagefilename;
    }

    public void setimagefilename(string imagefilename) {
        this.imagefilename = imagefilename;
    }

    private void close(fileoutputstream fos, fileinputstream fis) {
        if (fis != null) {
            try {
                fis.close();
            } catch (ioexception e) {
                system.out.println("fileinputstream关闭失败");
                e.printstacktrace();
            }
        }
        if (fos != null) {
            try {
                fos.close();
            } catch (ioexception e) {
                system.out.println("fileoutputstream关闭失败");
                e.printstacktrace();
            }
        }
    }

}

              
struts.xml配置文件


    "-//apache software foundation//dtd struts configuration 2.0//en"
    "http://struts.apache.org/dtds/struts-2.0.dtd">


    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
    
         
    
        
            /web-inf/page/message.jsp
        
    
    
    
        
            
            /images
            /web-inf/page/message.jsp
            /upload/upload.jsp
            
                
                image/bmp,image/png,image/gif,image/jpeg
                
                1025956
            
            
            
        
    


           
上传表单页面

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%@taglib uri="/struts-tags" prefix="s" %>



    
        

        
        
        
    

    
        
        
        
              enctype="multipart/form-data" method="post">
            文件:
                
        
        

        
    


           
显示结果页面

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s"%>


  
    
    
    
    
    
        
  
  
  
    上传成功！
    


    
    ">