Security登录成功后session域获取用户信息

Security登录成功后session域获取用户信息

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• 标签获取用户名

<%@ taglib prefix="security" uri="http://www.springframework.org/security/tags" %>
<security:authentication property="principal.username"/>

• 使用标签需要导约束

• 表达式获取

  ${sessionScope.SPRING_SECURITY_CONTEXT.authentication.principal.username}

   

• java代码获取

    @RequestMapping("/showUsername")
      public void showUsername(HttpServletRequest request) {
          //获得session对象
          HttpSession session = request.getSession();
          //取出session域中所有属性名
          Enumeration attributeNames = session.getAttributeNames();
          while (attributeNames.hasMoreElements()) {
              System.out.println(attributeNames.nextElement());
          }
          //SPRING_SECURITY_CONTEXT
          Object spring_security_context = session.getAttribute("SPRING_SECURITY_CONTEXT");
          System.out.println(spring_security_context);
          SecurityContext securityContext = (SecurityContext) spring_security_context;
          //获得认证信息
          Authentication authentication = securityContext.getAuthentication();
          //获得用户详情
          Object principal = authentication.getPrincipal();
          User user = (User) principal;
          String username = user.getUsername();
          System.out.println(username);
  
          //第二种方法
          //获取上下栈
          SecurityContext context = SecurityContextHolder.getContext();
          Authentication authentication1 = context.getAuthentication();
          User user1 = (User) authentication1.getPrincipal();
          String username1 = user1.getUsername();
      }

   

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