package action;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class UploadAction extends ActionSupport {

	private File[] upload;		//上传的文件内容
 
	private String[] uploadContentType;    //上传的文件类型

	private String[] uploadFileName;     //上传的文件名称

	private String savePath; 		//上传后的文件地址
	
	/**
	 * 注意：上传文件类型和上传文件名称，这两个属性的定义名，是根据文件内容这个属性的名称来定义的
	 *       比如：上传的文件内容--》  xxx
	 *             上传的文件类型--》  xxxContentType
	 *             上传的文件名称--》  xxxFileName
	 */
	
	public void addActionError(String anErrorMessage) {
		// 如果错误信息是此类英文开头
		if (anErrorMessage.startsWith("Request exceeded allowed size limit!")) {
			// 则使用正则表达式取出正在上传的文件大小值以及允许的值
			Matcher matcher = Pattern.compile("\\d+,\\d+,\\d+").matcher(anErrorMessage);
			String currentSize = "";
			String maxSize = "";
			if (matcher.find()) {
				maxSize = matcher.group();
			}
			if (matcher.find()) {
				currentSize = matcher.group();
			}

			super.addActionError("你上传的文件（" + currentSize + "）超过允许的大小（"
					+ maxSize + "）");
		} else {
			// 否则继续添加其他错误
			super.addActionError(anErrorMessage);
		}
	}

	public String upload() {
		try {
			for (int i = 0; i < upload.length; i++) {

				String url = ServletActionContext.getServletContext()
						.getRealPath(savePath)
						+ File.separator + uploadFileName[i];
				FileInputStream fis = new FileInputStream(upload[i]);
				FileOutputStream fos = new FileOutputStream(url);
				byte[] data = new byte[fis.available()];
				fis.read(data);
				fos.write(data);
				fis.close();
				fos.flush();
				fos.close();
			}
			ServletActionContext.getResponse().setContentType("text/html;charset=utf-8");
			ServletActionContext.getResponse().getWriter().print("<h1>上传成功！</h1>");

		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return null;
	}

	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() {
		return savePath;
	}

	public void setSavePath(String savePath) {
		this.savePath = savePath;
	}

}