有没有办法制作JSP打印托运返回（CR）？

Question

我目前正在使用JSP生成一些VCARD。我发现一些平台不识别这些生成的vCards，除非它们的线路通过回车（ cr ）分隔，而JSP似乎只使用行源（ lf ）默认为单独的行。

你们是否知道任何方式告诉JSP在每行之间包含CR？

我希望有人有一个线索，因为我没有找到太多...

提前感谢！

Answer 1

If you need to emit non-HTML format, then you should be using a servlet instead of a JSP. This way you're not dependent on the JspServlet and/or appserver specifics how the output is been generated. More than often you simply cannot control this.

Using a servlet is relatively simple. Create a class which extends HttpServlet and implement the doGet() method like follows:

response.setContentType("text/x-vcard");
response.setCharacterEncoding("UTF-8");
PrintWriter writer = response.getWriter();
writer.write("BEGIN:VCARD" + (char) 10);
// ...

Map this in web.xml on an url-pattern of /vcard/* or *.vcf or whatever and use the request servletpath/pathinfo/params to generate output dynamically based on the URL.