strut2 单个文件上传

<from enctype="multipart/form-data" action="${pageContext.request.contextPath}/list.action" method="post"
      <input type="file" name="uploadImage">
</form>

package cn.itcast.action;

import java.io.File;

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

import com.opensymphony.xwork2.ActionContext;

public class HelloWorldAction {
    private File image;
    private String imageFileName;
    public String getImageFileName() {
        return imageFileName;
    }
    public void setImageFileName(String imageFileName) {
        this.imageFileName = imageFileName;
    }
    public File getImage() {
        return image;
    }
    public void setImage(File image) {
        this.image = image;
    }
    public String addUI(){
        return "success";
    }

    public String execute() throws Exception{

        String realpath = ServletActionContext.getServletContext().getRealPath("/images");//得到文件保存的目录（文件的绝对路径）
        System.out.println(realpath);
        if(image!=null){
            File savefile = new File(new File(realpath), imageFileName);//savefile是一个完整的文件路径
            if(!savefile.getParentFile().exists()) savefile.getParentFile().mkdirs();//如果保存文件的目录不存在则创建目录
            FileUtils.copyFile(image, savefile);//调用系统函数拷贝文件image到savefile中
            ActionContext.getContext().put("message", "上传成功");
        }
        return "success";
    }
}

4.struts.xml文件配置如下所示：

<struts>
    <constant name="struts.enable.DynamicMethodInvocation" value="false"/>
    <!--控制文件上传的大小-->
    <constant name="struts.multipart.maxSize" value="10701096"/>

    <package name="employee" extends="struts-default">
        <action name="list_*" class="cn.itcast.action.HelloWorldAction" method="{1}">
            <result name="success">/WEB-INF/page/message.jsp</result>
        </action>
    </package>
</struts>