获取Session对象的几种方式

①得到底层HttpSession

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

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

public class WebUtils {

/**
* 得到requset
*/
public static HttpServletRequest getRequest() {
ServletRequestAttributes requestAttributes = (ServletRequestAttributes)
RequestContextHolder.getRequestAttributes();
HttpServletRequest request = requestAttributes.getRequest();
return request;
}

/**
* 得到session
*/
public static HttpSession getSession() {
return getRequest().getSession();
}

}

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②通过Shiro的SecurityUtils对象

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.session.Session;

public class ShiroService {

public void testMethod(){
Session session = SecurityUtils.getSubject().getSession();
Object val = session.getAttribute("key");

}

}