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程序员文章站 2022-07-13 12:46:19
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import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletResponse;

import org.apache.struts.upload.FormFile;

public class FileUpDownloader {

	public static void uploadFile(FormFile file, String filePath) {
		InputStream in = null;
		OutputStream out = null;
		try {
			in = file.getInputStream();
			out = new FileOutputStream(filePath);
			int readed = 0;
			byte[] buffer = new byte[1024];
			while ((readed = in.read(buffer, 0, 1024)) != -1) {
				out.write(buffer, 0, readed);
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				in.close();
				out.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}

	public static void downloadFile(HttpServletResponse response,String filePath) {
		InputStream in = null;
		OutputStream out = null;
		BufferedInputStream bin = null;
		BufferedOutputStream bout = null;
		try {
			File file = new File(filePath);
			if (file.exists()) {
				in = new FileInputStream(file);
				bin = new BufferedInputStream(in);
				out = response.getOutputStream();
				bout = new BufferedOutputStream(out);
				response.setHeader("Content-disposition","attachment;filename="+ URLEncoder.encode(filePath, "utf-8"));
				int bytesRead = 0;
				byte[] buffer = new byte[8192];
				while ((bytesRead = bin.read(buffer, 0, 8192)) != -1) {
					bout.write(buffer, 0, bytesRead);
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}finally{
			try{
				bout.flush();
				in.close();
				bin.close();
				out.close();
				bout.close();
			}catch(IOException e){
				e.printStackTrace();
			}
		}
	}
}