技術標籤：問題記錄tomcatspringmvc

在學習springmvc 時候，通過註解@ResponseBody註解直接返回一個字串時，中文全變成？？？了，網上各種查改這又改那。

我自己寫了個過濾器，通過設定contentType等都沒有效果

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.
 
out.println("========================================");
        servletRequest.setCharacterEncoding("UTF-8");
        servletResponse.setCharacterEncoding("UTF-8");
        servletResponse.setContentType("application/json;charset=utf-8");
        filterChain.doFilter
 
(servletRequest,servletResponse);
    }

搞了好久才發現，設定根本沒有生效（在Controller上設定也沒有效果）

最後是通過加produces這個屬性修改成功

 @RequestMapping(value = "/test/submit",produces = "application/json;charset=utf-8")

或者改為無返回值型別void

    @ResponseBody
    @RequestMapping(value = "/test/submit")
    public
 
 void testSubmit(@RequestParam("name") String name, HttpServletResponse response) throws IOException {
        response.setContentType("application/json;charset=utf-8");
        PrintWriter writer = response.getWriter();
        writer.print("中文不亂了");

    }

具體深究我找到一個分析該問題的博主的文章可以傳送過去連結