struts2-demo/web/WEB-INF/classes/com/demo/action/FileUploadAction.java

package com.demo.action;

import com.opensymphony.xwork2.ActionSupport;

import java.io.File;
import java.util.List;

public class FileUploadAction extends ActionSupport {

    private File upload;
    private String uploadFileName;
    private String uploadContentType;
    private List<File> uploads;
    private List<String> uploadsFileName;
    private List<String> uploadsContentType;
    private int fileCount;
    private String summary;

    @Override
    public String execute() {
        fileCount = 0;
        if (upload != null) {
            fileCount++;
        }
        if (uploads != null) {
            fileCount += uploads.size();
        }

        if (fileCount == 0) {
            addActionError("请至少选择一个文件再提交。 / Select at least one file before submitting the demo.");
            return INPUT;
        }

        summary = "metadata-only";
        return SUCCESS;
    }

    public File getUpload() {
        return upload;
    }

    public void setUpload(File upload) {
        this.upload = upload;
    }

    public String getUploadFileName() {
        return uploadFileName;
    }

    public void setUploadFileName(String uploadFileName) {
        this.uploadFileName = uploadFileName;
    }

    public String getUploadContentType() {
        return uploadContentType;
    }

    public void setUploadContentType(String uploadContentType) {
        this.uploadContentType = uploadContentType;
    }

    public List<File> getUploads() {
        return uploads;
    }

    public void setUploads(List<File> uploads) {
        this.uploads = uploads;
    }

    public List<String> getUploadsFileName() {
        return uploadsFileName;
    }

    public void setUploadsFileName(List<String> uploadsFileName) {
        this.uploadsFileName = uploadsFileName;
    }

    public List<String> getUploadsContentType() {
        return uploadsContentType;
    }

    public void setUploadsContentType(List<String> uploadsContentType) {
        this.uploadsContentType = uploadsContentType;
    }

    public int getFileCount() {
        return fileCount;
    }

    public String getSummary() {
        return summary;
    }
}