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How to compile source files encoding in utf-8 with eclipse?

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Hi all,

I am developing a tiny JSP app, and encounter a strange problem. I use 
Eclipse as IDE and want to use utf-8 to encode everything such as source 
files, JSP pages and class files. There are serveral settings I have done:
1. Windows > Preference > General > Workspace > Text file encoding > utf-8.
2. Windows > Preference > General > Content Types > Text > Java Source 
File > utf-8.
3. Windows > Preference > General > Content Types > Java Class File > utf-8.
Then, I restarted Eclipse.

The server is Tomcat 9.0. A Servlet is created with its doGet() code:

protected void doGet(HttpServletRequest request,
                      HttpServletResponse response)
                      throws ServletException, IOException {
   response.setContentType("text/html;charset=utf-8");
   response.getWriter().write("****");
}
ps. * represents a chinese character.

When runinng on the server (starting from Eclipse), there some '?' on 
the page. I think there are some troubles about encoding. Then, I 
recompiled the source file on the command line with the following command:

javac -encoding utf-8 filename -classpath ...

and copied the generated class file into tomcat's app directory. The 
page display the chniese characters normally. I think the difference is 
at the encoding of class file. I can change that by command line with 
-encoding option, but how to do that with Eclipse? Or there something I 
have not been aware of.

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How to compile source files encoding in utf-8 with eclipse? parmenides <xparmenides@yahoo.com> - 2017-05-12 18:58 +0800
  Re: How to compile source files encoding in utf-8 with eclipse? Marcel Mueller <news.5.maazl@spamgourmet.org> - 2017-05-12 15:04 +0200

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