package com.zking.five;

import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.apache.commons.io.FileUtils;
import org.apache.coyote.http11.filters.BufferedInputFilter;

import com.zking.test.web.BaseAction;

/**
 * 檔案上傳的三種方式 
 * 1.上傳的圖片以二進位制儲存到資料庫（activiti,jbpm工作框架） oa系統
 * 2.將檔案上傳到指定到伺服器的硬碟（cpu快，硬碟較大） 
 * 3.將檔案上傳到tomcat所在伺服器（對應的靜態資源伺服器--上線不重啟）
 * 
 * @author Administrator
 *
 */
public class fileAction extends BaseAction {
	// 這是jsp傳遞過來的具體檔案
	private File file;
	// 檔名
	private String fileFileName;
	// 檔案型別
	private String fileContentType;
	// 虛擬路徑
	private String serverDir = "/upload";

	/**
	 * 上傳圖片至伺服器
	 * 
	 * @return
	 * @throws IOException
	 */
	public String upload() throws IOException {
		System.out.println("fileFileName:" + fileFileName);
		System.out.println("fileContentType:" + fileContentType);
		String realPath = getRealPath(serverDir + "/" + fileFileName);
		System.out.println("真實路徑：" + realPath);
		FileUtils.copyFile(file, new File(realPath));
		return "success";
	}

	/**
	 * 獲取資料夾的真實路徑
	 * 
	 * @param path
	 * @return
	 */
	private String getRealPath(String path) {
		return this.request.getServletContext().getRealPath(path);
	}

	/**
	 * 下載圖片
	 * 
	 * @return
	 * @throws IOException 
	 */
	public String saveAs() throws IOException {
		// 從資料庫獲取fileName，fileType
		String fileName = "s1.jpg";
		String fileType = "image/jpg";
		response.setContentType(fileType);
		response.setHeader("Content-Disposition", "attachment;filename=" + fileName);
		String realPath = getRealPath(serverDir + "/" + fileName);
		// 從伺服器獲取圖片寫到本地
		FileUtils.copyFile(new File(realPath), response.getOutputStream());
		return null;
	}
	
	/**
	 * 直接在頁面開啟圖片
	 * 
	 * @return
	 * @throws IOException
	 */
	public String openAs() throws IOException {
		// 從資料庫獲取fileName，fileType
		String fileName = "s2.jpg";
		String fileType = "image/jpg";
		response.setContentType(fileType);
		response.setHeader("Content-Disposition", "filename=" + fileName);
		String realPath = getRealPath(serverDir + "/" + fileName);
		// 從伺服器獲取圖片寫到本地
//		FileUtils.copyFile(new File(realPath), response.getOutputStream());
		BufferedInputStream in =new BufferedInputStream(new FileInputStream(new File(realPath)));
		BufferedOutputStream out=new BufferedOutputStream(response.getOutputStream());
		copyBufStream(in, out);
		return null;
	}
	/**
	 * copy二進位制檔案用的
	 * @param in	從那裡來
	 * @param out	寫到那裡去
	 * @throws IOException 
	 */
	private void copyBufStream(BufferedInputStream in,BufferedOutputStream out) throws IOException {
		byte[] buf=new byte[1024];
		int len=0;
		while((len=in.read(buf))!=-1) {
			out.write(buf,0,len);
		}
		in.close();
		out.close();
	}
	
	public File getFile() {
		return file;
	}

	public void setFile(File file) {
		this.file = file;
	}

	public String getFileFileName() {
		return fileFileName;
	}

	public void setFileFileName(String fileFileName) {
		this.fileFileName = fileFileName;
	}

	public String getFileContentType() {
		return fileContentType;
	}

	public void setFileContentType(String fileContentType) {
		this.fileContentType = fileContentType;
	}

}