What should I do if java returns garbled characters?

What should I do if java returns garbled characters?

The solution to the problem that the java server returns Chinese garbled characters

Recommended tutorial: "java learning"

Chinese transmitted from the java server Displayed as a question mark "?", for example, the value of the following name:

The reason is that the charset of the server response is not set to "UTF-8", and the default is "ISO-8859-1".

Solution:

Add a sentence before PrintWriter out = response.getWriter();

:

response.setHeader("Content-type" , "application/json;charset=UTF-8");

Note: Be sure to add it before PrintWriter out = response.getWriter();, otherwise the charset of PrintWriter will still be the default "ISO-8859-1 "

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