2018-03-04 Filter类(一):实现全站响应编码同一

笔记如下

• 首先要使用Filter类的实现类,必须到web.xml中去注册.

  
  
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• EncodingFilter

//同一配置编码
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {
        // TODO Auto-generated method stub
        String encoding = config.getInitParameter("encoding");
        
        response.setContentType("text/html;charset=" + encoding);
        chain.doFilter(request, response);
        
        
    }