<!-- Spring Web -->

        <dependency>

            <groupId>org.springframework</groupId>

            <artifactId>spring-web</artifactId>

            <version>5.2.12.RELEASE</version>

        </dependency>

        <!-- Java Servlet -->

        <dependency>

            <groupId>javax.servlet</groupId>

            <artifactId>javax.servlet-api</artifactId>

            <version>4.0.1</version>

        </dependency>

import org.springframework.web.context.request.RequestAttributes;

import org.springframework.web.context.request.RequestContextHolder;

import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import java.util.Enumeration;

import java.util.LinkedHashMap;

import java.util.Map;

/**

 * 工具类

 *

 */

public class ServletUtils {

    /**

     * 获取String参数

     * @param name 参数名

     */

    public static String getParameter(String name) {

        return getRequest().getParameter(name);

    }

    /**

     * 获取request

     */

    public static HttpServletRequest getRequest() {

        try {

            return getRequestAttributes().getRequest();

        } catch (Exception e) {

            return null;

        }

    }

    /**

     * 获取response

     */

    public static HttpServletResponse getResponse() {

        try {

            return getRequestAttributes().getResponse();

        } catch (Exception e) {

            return null;

        }

    }

    /**

     * 获取session

     */

    public static HttpSession getSession() {

        return getRequest().getSession();

    }

    public static ServletRequestAttributes getRequestAttributes() {

        try {

            RequestAttributes attributes = RequestContextHolder.getRequestAttributes();

            return (ServletRequestAttributes) attributes;

        } catch (Exception e) {

            return null;

        }

    }

    /**

     * 获取请求头所有数据

     * @param request

     * @return

     */

    public static Map<String, String> getHeaders(HttpServletRequest request) {

        Map<String, String> map = new LinkedHashMap<>();

        Enumeration<String> enumeration = request.getHeaderNames();

        if (enumeration != null) {

            while (enumeration.hasMoreElements()) {

                String key = enumeration.nextElement();

                String value = request.getHeader(key);

                map.put(key, value);

            }

        }

        return map;

    }

}