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將字串或檔案控制瀏覽器以下載的形式開啟檔案

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


import javax.servlet.http.HttpServletResponse;
import java.io.*;


/**
 * 將字串或檔案控制瀏覽器以下載的形式開啟檔案
 * Created by yjli on 2017/4/25.
 */
@Controller
@RequestMapping("/upload")
public class UploadFileController {


    @RequestMapping("/upload")
    public void test(HttpServletResponse response){
        String filename = "a.xml";
        String msg = "123456";
        response.reset();
        response.setContentType("application/x-download");
        response.setCharacterEncoding("UTF-8");
        try {
            //設定content-disposition響應頭控制瀏覽器以下載的形式開啟檔案
            response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("GB2312"), "iso8859-1"));
            // 輸出資源內容到相應物件
            response.getOutputStream().write(msg.getBytes("utf-8"));
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    @RequestMapping("/uploadFile")
    public void test1(HttpServletResponse response){
        String filename = "a.xml";
        String msg = "123456";
        response.reset();
        response.setContentType("application/x-download");
        response.setCharacterEncoding("UTF-8");
        try {
//            InputStream in = new FileInputStream(new File(filename));
            InputStream in = new BufferedInputStream(new ByteArrayInputStream(msg.getBytes("utf-8")));
            if (in == null)
                return;
            //設定content-disposition響應頭控制瀏覽器以下載的形式開啟檔案
            response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes("GB2312"), "iso8859-1"));
            // 輸出資源內容到相應物件
            byte[] b = new byte[1024];
            int len;
            OutputStream out = response.getOutputStream();
            while ((len = in.read(b, 0, 1024)) != -1) {
                out.write(b, 0, len);
            }
            in.close();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}