IpUtil,CookeiUtil,ObjectMapperUtil工具类

Posted 2021-07-21 宇宙磅礴而冷漠

文章目录

• IpUtil
• CookieUtil
• ObjectMapperUtil

IpUtil

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import javax.servlet.http.HttpServletRequest;

public class IPUtils {
    private static Logger logger = LoggerFactory.getLogger(IPUtils.class);
    public static String getIpAddr() {
        HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();
        String ip = null;
        try {
            ip = request.getHeader("x-forwarded-for");
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
            }
            if (StringUtils.isEmpty(ip) || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
            }
        } catch (Exception e) {
            logger.error("IPUtils ERROR ", e);
        }
        return ip;
    }
}

CookieUtil

import org.springframework.boot.web.servlet.server.Session;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CookieUtil {

    public static void addCookie(HttpServletResponse response,String cookieName, String cookieValue, String doMain, int second){
        javax.servlet.http.Cookie cookie=new Cookie(cookieName,cookieValue );
        cookie.setDomain(doMain);
        cookie.setMaxAge(second);
        cookie.setPath("/");
        response.addCookie(cookie);
    }
    public static  Cookie getCookie(HttpServletRequest request,String cookieName){
        Cookie[] cookies=request.getCookies();
        if(cookies!=null&&cookies.length>0){
            for (Cookie cookie:cookies){
                if(cookie.getName().equals(cookieName)){
                    return cookie;
                }
            }
        }
        return null;
    }
    public static String getCookieValue(HttpServletRequest request,String cookieName){
        Cookie cookie=getCookie(request,cookieName );
        return cookie==null?null:cookie.getValue();
    }
}

ObjectMapperUtil

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

public class ObjectMapperUtil {
    private static final ObjectMapper MAPPER=new ObjectMapper();
    public static String toJSON(Object obj){
        try {
            return MAPPER.writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            //将检查异常转化为运行时异常，之后被全局异常处理机制处理
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }
    //json转对象
    public static <T>T toObject(String json,Class<T> target){
        try {
            return MAPPER.readValue(json,target );
        } catch (JsonProcessingException e) {
            //将检查异常转化为运行时异常，之后被全局异常处理机制处理
            e.printStackTrace();
            throw new RuntimeException(e);
        }
    }
}