There are many ways to garbled code, here is a point that is not easy to think of
*Please make sure that your page is accessed separately. When forwarding through servlet requests, PrintWriter out = response.getWriter() is not normal, and there is no normal
The solution is to add it before executing PrintWriter out = response.getWriter();
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf-8");
Explanation of principle:
Use response.getWriter() directly, then the encoding method of the stream will be specified ISO-8859-1, and it will be useless to specify the encoding after it.
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