我想从Servlet中向HttpServletResponse添加一些纯文本内容和两个标头 [英] I want from a servlet to add some plain text content and two headers to the HttpServletResponse

问题描述

我想在HttpServletResponse上添加一些纯文本和两个标题，代码如下:

I want to add some plain text and two headers to the HttpServletResponse, the code is the following:

resp.setContentType("text/plain");

resp.getWriter().write(messages.get(next).getContent());

resp.addHeader("success", "yes");

resp.addHeader("hasnext", ((Boolean)hasNext).toString());

我遇到的问题是发送内容会阻止发送标头.如果我不写内容，则可以很好地接收标头，如果我包含不包含的文本，则可以.

The problem I encounter is that sending the content prevents the sending of the headers. If I don't write the content the headers are received fine, if I include the text they don't.

出什么问题了?

推荐答案

尝试首先设置标题.另外，我假设您在回复完毕后致电writer.flush().

Try setting your headers first. Also I'm assuming you call writer.flush() after you are done with your response.

更新

您可以检查以下各项是否有效:

Can you check if the following works:

protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setHeader("Content-Type", "text/plain");
    response.setHeader("success", "yes");
    PrintWriter writer = response.getWriter();
    writer.write("hello\n");
    writer.close();
}

使用curl -i http://yourapp.appspot.com验证标题.

这篇关于我想从Servlet中向HttpServletResponse添加一些纯文本内容和两个标头的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！