ajax判断

 

    
    protected boolean isAjaxRequest(HttpServletRequest request) {
        if (request.getHeader("X-Requested-With") != null 
        		&& "XMLHttpRequest".equalsIgnoreCase(request.getHeader("X-Requested-With"))) {
            return true;
        }
        return false;
    }

 

 

 

    private StringBuilder prepareBuilder() {
        if (value != null) {
            value.append(delimiter);
        } else {
            value = new StringBuilder().append(prefix);
        }
        return value;
    }


public final class StringJoiner {
    private final String prefix;
    private final String delimiter;
    private final String suffix;

 

 

 

    public static String getRemoteIP(HttpServletRequest request) {
        String ip = request.getHeader("J-Forwarded-For");
        if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
            return ip;
        } else {
            ip = request.getHeader("X-Forwarded-For");
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }

            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }

            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }

            if (ip != null) {
                int position = ip.indexOf(",");
                if (position > 0) {
                    ip = ip.substring(0, position);
                }
            }

            return ip;
        }

 

@Component
public class FormSubmitHandlerFactory implements InitializingBean, ApplicationContextAware {

    private static final
    Map<String, FormSubmitHandler<Serializable>> FORM_SUBMIT_HANDLER_MAP = new HashMap<>(8);

    private ApplicationContext appContext;

    /**
     * 根据提交类型获取对应的处理器
     *
     * @param submitType 提交类型
     * @return 提交类型对应的处理器
     */
    public FormSubmitHandler<Serializable> getHandler(String submitType) {
        return FORM_SUBMIT_HANDLER_MAP.get(submitType);
    }

    @Override
    public void afterPropertiesSet() {
        // 将 Spring 容器中所有的 FormSubmitHandler 注册到 FORM_SUBMIT_HANDLER_MAP
        appContext.getBeansOfType(FormSubmitHandler.class)
                  .values()
                  .forEach(handler -> FORM_SUBMIT_HANDLER_MAP.put(handler.getSubmitType(), handler));
    }

    @Override
    public void setApplicationContext(@NonNull ApplicationContext applicationContext) {
        appContext = applicationContext;
    }
}

 

 

nospecifyType