标签:write JAVA ServletException resp req HttpServletResponse --- session
package servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
/**
*
*
* @create 2022-05-01 16:28
*/
public class SessionServlet extends BaseServlet {
protected void createOrGetSession(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//创建和获取session会话对象
HttpSession session = req.getSession();
//判断当前Session会话,是否是新创建出来的
boolean isNew = session.isNew();
//获取Session会话的唯一标识id
String id = session.getId();
resp.getWriter().write("得到的session,它的id是:" + id + "<br/>");
resp.getWriter().write("这个Session是否是新创建的" + isNew + "<br/>");
}
protected void setAttribute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.getSession().setAttribute("key1", "value1");
resp.getWriter().write("向session中保存了数据");
}
protected void getAttribute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
Object key1 = req.getSession().getAttribute("key1");
resp.getWriter().write("从session中获取出key1的数据是:"+key1);
}
protected void defaultLife(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//获取session的默认超时时长
int maxInactiveInterval = req.getSession().getMaxInactiveInterval();
resp.getWriter().write("Session的默认超时时长为:"+maxInactiveInterval+"秒");
}
protected void life3(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//获取session对象
HttpSession session = req.getSession();
//设置当前Session3秒后超时
session.setMaxInactiveInterval(3);
resp.getWriter().write("当前sessin已经设置为3秒后超时");
}
protected void deleteNow(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
//先获取session对象
HttpSession session = req.getSession();
//让session会话马上超时
session.invalidate();
resp.getWriter().write("session已经设置为超时(无效)");
}
}
标签:write,JAVA,ServletException,resp,req,HttpServletResponse,---,session 来源: https://www.cnblogs.com/fate-/p/16213256.html
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