【SpringSecurity】二、自定义页面前后端分离

1、用户认证流程

AuthenticationSuccessHandler AuthenticationFailureHandler

• 登录成功后调用：AuthenticationSuccessHandler
• 登录失败后调用：AuthenticationFailureHandler
  

public class SecurityAuthenticationSuccessHandler implements AuthenticationSuccessHandler {
    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {

        //获取用户身份信息
        Object principal = authentication.getPrincipal();

        //创建结果对象
        HashMap result = new HashMap();
        result.put("code", 0);
        result.put("message", "登录成功");
        result.put("data", principal);

        //转换成json字符串
        String json = JSON.toJSONString(result);

        //返回响应
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().println(json);
    }
}

SecurityFilterChain配置

form.successHandler(new SecurityAuthenticationSuccessHandler()) //认证成功时的处理

用户认证信息

@RestController
public class IndexController {

    @GetMapping("/")
    public Map index(){

        System.out.println("index controller");

        SecurityContext context = SecurityContextHolder.getContext();//存储认证对象的上下文
        Authentication authentication = context.getAuthentication();//认证对象
        String username = authentication.getName();//用户名
        Object principal =authentication.getPrincipal();//身份
        Object credentials = authentication.getCredentials();//凭证(脱敏)
        Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();//权限

        System.out.println(username);
        System.out.println(principal);
        System.out.println(credentials);
        System.out.println(authorities);

        //创建结果对象
        HashMap result = new HashMap();
        result.put("code", 0);
        result.put("data", username);

        return result;
    }
}

2、会话并发处理

后登录的账号会使先登录的账号失效

2.1、实现处理器接口

实现接口SessionInformationExpiredStrategy

package com.atguigu.securitydemo.config;

public class MySessionInformationExpiredStrategy implements SessionInformationExpiredStrategy {
    @Override
    public void onExpiredSessionDetected(SessionInformationExpiredEvent event) throws IOException, ServletException {

        //创建结果对象
        HashMap result = new HashMap();
        result.put("code", -1);
        result.put("message", "该账号已从其他设备登录");

        //转换成json字符串
        String json = JSON.toJSONString(result);

        HttpServletResponse response = event.getResponse();
        //返回响应
        response.setContentType("application/json;charset=UTF-8");
        response.getWriter().println(json);
    }
}

2.2、SecurityFilterChain配置

//会话管理
http.sessionManagement(session -> {
    session
        .maximumSessions(1)
        .expiredSessionStrategy(new MySessionInformationExpiredStrategy());
});