Struts2文件上传

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单文件上传：
package com.structs2;

import java.io.File;
import java.io.IOException;

import javax.servlet.jsp.PageContext;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;

public class HelloWordAction {
    private File image;
    private String imageFileName;

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 execute() throws IOException {
    //单文件上传
    String realpath = ServletActionContext.getServletContext().getRealPath("/update");
    System.out.println(realpath);
    if(image!=null)
    {
        File savefile = new File(new File(realpath),imageFileName);
        if(!savefile.getParentFile().exists())
            savefile.getParentFile().mkdirs();
        FileUtils.copyFile(image, savefile);
        //下边两句必须放在if语句里面
        ActionContext ctx = ActionContext.getContext();
        ctx.put("message", "上传成功");

    }

    return "success";
}

}

多文件上传：
package com.structs2;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;

public class HelloAction {
    private File[] image;//可以是数组类型，也可以是List类型
    private String[] imageFileName;//可以是数组类型，也可以是List类型

    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 execute() throws IOException{
        //多文件上传
        String realpath = ServletActionContext.getServletContext().getRealPath("/update");
        System.out.println(realpath);
        if(image!=null)
        {
            File pfile = new File(realpath);
            if(!pfile.exists())//判断如果文件夹不存在，那么就创建文件夹，带有目录的文件夹
                pfile.mkdirs();
            for(int i=0;i<image.length;i++)
            {
            File savefile = new File(pfile,imageFileName[i]);
            FileUtils.copyFile(image[i], savefile);
            }
            //下边两句必须放在if语句里面
            ActionContext ctx = ActionContext.getContext();
            ctx.put("message", "上传成功");

        }
        return "success";
    }
}

struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>

<constant name="struts.multipart.maxSize" value="10701096"/>
    <package name="default" namespace="/test" extends="struts-default">



        <action name="file" class="com.structs2.HelloWordAction"
            method="execute">
            <result name="success" >/hello.jsp</result>
        </action>

        <action name="files" class="com.structs2.HelloAction"
            method="execute">
            <result name="success" >/hello.jsp</result>
        </action>
    </package>
</struts>