@ResponseBody
@RequestMapping(value = "get_method_test", method = RequestMethod.GET,produces = "application/json;charset=GBK") public String getMethodTest(HttpServletRequest request) {
1、GBK
produces = "application/json;charset=GBK"
2、utf-8
produces = "application/json;charset=utf-8"
3、ISO-8859-1
produces = "application/json;charset=ISO-8859-1"
原文：https://www.cnblogs.com/wwssgg/p/14961073.html