public interface View {
    String RESPONSE_STATUS_ATTRIBUTE = org.springframework.web.servlet.View.class.getName() + ".responseStatus";
    String PATH_VARIABLES = org.springframework.web.servlet.View.class.getName() + ".pathVariables";
    String SELECTED_CONTENT_TYPE = org.springframework.web.servlet.View.class.getName() + ".selectedContentType";

    /**
     *用于http协议传过来的期望数据类型与此做对比从多个View里面找出合适的view
     * @return
     */
    @Nullable
    default String getContentType() {
        return null;
    }

    /**
     * 执行view 渲染逻辑
     * @param var1
     * @param var2
     * @param var3
     * @throws Exception
     */
    void render(@Nullable Map<String, ?> var1, HttpServletRequest var2, HttpServletResponse var3) throws Exception;
}