java实现文件下载 文件导出

1、java代码

package com.gdpost.gdmgr.controller;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import com.gdpost.gdmgr.common.RequestResponseUtils;

@Controller
@RequestMapping("/exportController")
public class SynSalesController {
	@RequestMapping("/download.do")
	@ResponseBody
	public void testDownload() {
		HttpServletResponse res=RequestResponseUtils.getResponse();
	        res.setHeader("content-type", "text/plain");//根据文件类型，可修改
		res.setHeader("content-type", "application/x-msdownload;");
		res.setContentType("text/plain; charset=utf-8");
		res.setHeader("Content-Disposition", "attachment; filename=test.txt");
		byte[] buff = new byte[1024];
		BufferedInputStream bis = null;
		OutputStream os = null;
 
		try {
			os = res.getOutputStream();
			//固定的文件存放目录
			StringBuilder path = new StringBuilder("//file//test.txt");
			
			bis = new BufferedInputStream(new FileInputStream(new File(path.toString())));
			
			int i = bis.read(buff);
 
			while (i != -1) {
				os.write(buff, 0, buff.length);
				os.flush();
				i = bis.read(buff);
			}
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (bis != null) {
				try {
					bis.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
			}
		}
	}
}

 

2、前端Jquery代码

2、前端html代码  

文件下载