服务端推送multipart/x-凯发k8国际

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2023-12 ( 11)
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服务端推送multipart/x-mixed-replace

博客分类：

java

java

往网页分批推送数据：boundary=end,总头-->分头-->body

@getmapping("/test")
    public void testjpg(httpservletresponse response) throws ioexception{
        response.setcontenttype("multipart/x-mixed-replace;boundary=end");

        // set the content type based on the file type you need to download
        string contenttype = "content-type: image/jpeg";

        // list of files to be downloaded
        list files = new arraylist();
        files.add(new file("c:\\users\\administrator\\desktop\\qq\\51.jpg"));
        files.add(new file("c:\\users\\administrator\\desktop\\qq\\52.jpg"));
        files.add(new file("c:\\users\\administrator\\desktop\\qq\\53.jpg"));

        servletoutputstream out = response.getoutputstream();

        // print the boundary string
        out.println();
        out.println("--end");

        for(int i =0;i<500;i ) {
            for (file file : files) {

                // get the file
                fileinputstream fis = null;
                try {
                    fis = new fileinputstream(file);

                } catch (filenotfoundexception fnfe) {
                    // if the file does not exists, continue with the next file
                    system.out.println("could not find file " file.getabsolutepath());
                    continue;
                }

                bufferedinputstream fif = new bufferedinputstream(fis);

                // print the content type
                out.println(contenttype);
                out.println("content-disposition: attachment; filename=" file.getname());
                out.println();

                system.out.println("sending file " file.getname());

                // write the contents of the file
                int data = 0;
                while ((data = fif.read()) != -1) {
                    out.write(data);
                }
                fif.close();

                try {
                    thread.sleep(500);
                } catch (interruptedexception e) {
                    e.printstacktrace();
                }

                // print the boundary string
                out.println();
                out.println("--end");
                out.flush();
                system.out.println("finished sending file " file.getname());
            }
        }
        // print the ending boundary string
        out.println("--end--");
        out.flush();
        out.close();

    }

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| springcloud之链路追踪zipkin

2023-12-07 15:26
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分类:编程语言

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