spring boot 添加拦截器demo：freemarker获取basePath

 拦截器类

package com.dr.Interceptor;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by NERV on 2016/12/16.
 */
public class CommonInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        String path = httpServletRequest.getContextPath();
        String scheme = httpServletRequest.getScheme();
        String serverName = httpServletRequest.getServerName();
        int port = httpServletRequest.getServerPort();
        String basePath = scheme + "://" + serverName + ":" + port + path;
        httpServletRequest.setAttribute("basePath", basePath);
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}

注册拦截器

package com.dr.config;

import com.dr.Interceptor.CommonInterceptor;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * Created by NERV on 2016/12/16.
 */
@Configuration
public class CommonInterceptorConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new CommonInterceptor()).addPathPatterns("/**");
    }
}

前台取值

${basepath}