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springboot根據(jù)sessionId查詢session方式

更新時(shí)間：2026年04月10日 09:45:20 作者：佛說(shuō)"獨(dú)"

文章介紹了通過(guò)保存session和sessionId進(jìn)行跨域問(wèn)題的校驗(yàn),提出創(chuàng)建保存session的類,建立監(jiān)聽器監(jiān)聽session的創(chuàng)建和銷毀,并在啟動(dòng)類上添加注解@ServletComponentScan以掃描SessionListener

問(wèn)題

跨域問(wèn)題，session無(wú)法進(jìn)行同步，可以通過(guò)保存session和sessionId的方式進(jìn)行校驗(yàn)，向前端傳送sessionId，前端可以通過(guò)頭部傳sessionId，通過(guò)sessionId獲取相關(guān)的信息，進(jìn)行校驗(yàn)等操作

1、創(chuàng)建一個(gè)類用于保存session

對(duì)session進(jìn)行添加，刪除，查詢

/**
 * 自定義獲取指定sessionId的session
 */
public class MySessionContext {
    private static MySessionContext instance;
    private HashMap mymap;

    private MySessionContext() {
        mymap = new HashMap();
    }

    /**
     * 創(chuàng)建MySessionContext的對(duì)象
     * @return
     */
    public static MySessionContext getInstance() {
        if (instance == null) {
            instance = new MySessionContext();
        }
        return instance;
    }

    /**
     * 添加session
     * @param session
     */
    public synchronized void AddSession(HttpSession session) {
        if (session != null) {
            mymap.put(session.getId(), session);
        }
    }

    /**
     * 刪除session
     * @param session
     */
    public synchronized void DelSession(HttpSession session) {
        if (session != null) {
            mymap.remove(session.getId());
        }
    }

    /**
     * 查詢session
     * @param session_id
     * @return
     */
    public synchronized HttpSession getSession(String session_id) {
        if (session_id == null) {
            return null;
        }
        return (HttpSession) mymap.get(session_id);
    }

}

2、建立一個(gè)監(jiān)聽器

監(jiān)聽session的創(chuàng)建和銷毀

/**
 * 監(jiān)聽器來(lái)監(jiān)控session的創(chuàng)建銷毀
 */
@WebListener
public class SessionListener implements HttpSessionListener {

    private MySessionContext myc = MySessionContext.getInstance();

    @Override
    public void sessionCreated(HttpSessionEvent httpSessionEvent) {
        myc.AddSession(httpSessionEvent.getSession());
    }

    @Override
    public void sessionDestroyed(HttpSessionEvent httpSessionEvent) {
        HttpSession session = httpSessionEvent.getSession();
        myc.DelSession(session);
    }
}

3、在啟動(dòng)類上添加注解

@ServletComponentScan用于掃描到SessionListener

@SpringBootApplication
@ServletComponentScan
public class RunMain{
	public static void main(String[] args) {
		SpringApplication.run(RunMain.class, args);
	}	
}

操作代碼

 //創(chuàng)建MySessionContext對(duì)象
 MySessionContext myContext = MySessionContext.getInstance();
 //存儲(chǔ)session
 myContext.AddSession(session);
 //根據(jù)sessionId獲取session
 HttpSession httpSession = myContext.getSession(sessionId);
 //刪除session
 myContext.DelSession(session);