目录

一、实现前后端分离

1.1、导入pom依赖

1.2、认证成功处理

1.3、认证失败处理

1.4、用户注销处理 

1.5、请求未认证处理 

1.6、跨域处理 

1.7、用户认证信息处理 

1.8、会话并发处理 

 

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一、实现前后端分离

1.1、导入pom依赖

<dependency><groupId>com.alibaba.fastjson2</groupId><artifactId>fastjson2</artifactId><version>2.0.40</version></dependency>

1.2、认证成功处理

public class MyAuthenticationSuccessHandler implements AuthenticationSuccessHandler {@Overridepublic void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {//获取用户身份信息Object principal = authentication.getPrincipal();HashMap map = new HashMap<>();map.put("code",200);map.put("message","登录成功");map.put("data",principal);//将信息json化String jsonString = JSON.toJSONString(map);//返回json数据到前端response.setContentType("application/json;charset=UTF-8");response.getWriter().println(jsonString);}
}

@Beanpublic SecurityFilterChain securityFilterChain(HttpSecurity httpSecurity) throws Exception {httpSecurity.authorizeRequests(authorize -> authorize.anyRequest() //对所有请求开启授权保护.authenticated() //已认证的请求会自动授权).formLogin(//Customizer.withDefaults()form -> form.loginPage("/login").permitAll()//无需授权就能访问.usernameParameter("name").passwordParameter("pass").successHandler(new MyAuthenticationSuccessHandler())//认证成功的处理);//使用表单授权方式//.httpBasic(Customizer.withDefaults());//使用基本授权方式httpSecurity.csrf(csrf -> csrf.disable());//关闭csrf功能return httpSecurity.build();}

1.3、认证失败处理

public class MyAuthenticationFailureHandler implements AuthenticationFailureHandler {@Overridepublic void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException {String localizedMessage = exception.getLocalizedMessage();HashMap map = new HashMap<>();map.put("code",400);map.put("message",localizedMessage);//将信息json化String jsonString = JSON.toJSONString(map);//返回json数据到前端response.setContentType("application/json;charset=UTF-8");response.getWriter().println(jsonString);}
}

@Beanpublic SecurityFilterChain securityFilterChain(HttpSecurity httpSecurity) throws Exception {httpSecurity.authorizeRequests(authorize -> authorize.anyRequest() //对所有请求开启授权保护.authenticated() //已认证的请求会自动授权).formLogin(//Customizer.withDefaults()form -> form.loginPage("/login").permitAll()//无需授权就能访问.usernameParameter("name").passwordParameter("pass").successHandler(new MyAuthenticationSuccessHandler())//认证成功的处理.failureHandler(new MyAuthenticationFailureHandler())//认证失败的处理);//使用表单授权方式//.httpBasic(Customizer.withDefaults());//使用基本授权方式httpSecurity.csrf(csrf -> csrf.disable());//关闭csrf功能return httpSecurity.build();}

1.4、用户注销处理 

public class MyLogoutSuccessHandler implements LogoutSuccessHandler {@Overridepublic void onLogoutSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {HashMap map = new HashMap<>();map.put("code",200);map.put("message","注销成功");//将信息json化String jsonString = JSON.toJSONString(map);//返回json数据到前端response.setContentType("application/json;charset=UTF-8");response.getWriter().println(jsonString);}
}

@Beanpublic SecurityFilterChain securityFilterChain(HttpSecurity httpSecurity) throws Exception {httpSecurity.authorizeRequests(authorize -> authorize.anyRequest() //对所有请求开启授权保护.authenticated() //已认证的请求会自动授权);httpSecurity.formLogin(//Customizer.withDefaults()//使用表单授权方式//.httpBasic(Customizer.withDefaults());//使用基本授权方式form -> form.loginPage("/login").permitAll()//无需授权就能访问.usernameParameter("name").passwordParameter("pass").successHandler(new MyAuthenticationSuccessHandler())//认证成功的处理.failureHandler(new MyAuthenticationFailureHandler())//认证失败的处理);httpSecurity.logout(logout ->logout.logoutSuccessHandler(new MyLogoutSuccessHandler())//用户注销成功处理);httpSecurity.csrf(csrf -> csrf.disable());//关闭csrf功能return httpSecurity.build();}

1.5、请求未认证处理 

public class MyAuthenticationEntryPoint implements AuthenticationEntryPoint {@Overridepublic void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {String localizedMessage = authException.getLocalizedMessage();HashMap map = new HashMap<>();map.put("code",400);map.put("message",localizedMessage);//将信息json化String jsonString = JSON.toJSONString(map);//返回json数据到前端response.setContentType("application/json;charset=UTF-8");response.getWriter().println(jsonString);}
}

@Beanpublic SecurityFilterChain securityFilterChain(HttpSecurity httpSecurity) throws Exception {httpSecurity.authorizeRequests(authorize -> authorize.anyRequest() //对所有请求开启授权保护.authenticated() //已认证的请求会自动授权);httpSecurity.formLogin(//Customizer.withDefaults()//使用表单授权方式//.httpBasic(Customizer.withDefaults());//使用基本授权方式form -> form.loginPage("/login").permitAll()//无需授权就能访问.usernameParameter("name").passwordParameter("pass").successHandler(new MyAuthenticationSuccessHandler())//认证成功的处理.failureHandler(new MyAuthenticationFailureHandler())//认证失败的处理);httpSecurity.logout(logout ->logout.logoutSuccessHandler(new MyLogoutSuccessHandler())//用户注销成功处理);httpSecurity.exceptionHandling(exception ->exception.authenticationEntryPoint(new MyAuthenticationEntryPoint()));//请求未认证处理httpSecurity.csrf(csrf -> csrf.disable());//关闭csrf功能return httpSecurity.build();}

1.6、跨域处理 

httpSecurity.cors(Customizer.withDefaults());//跨域处理

1.7、用户认证信息处理 

@RestController
public class IndexController {@GetMapping("/")public Map index(){SecurityContext context = SecurityContextHolder.getContext();Authentication authentication = context.getAuthentication();Object principal = authentication.getPrincipal();Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();HashMap map = new HashMap<>();map.put("principal",principal);map.put("权限",authorities);return map;}
}

1.8、会话并发处理 

public class MySessionInformationExpiredStrategy implements SessionInformationExpiredStrategy {@Overridepublic void onExpiredSessionDetected(SessionInformationExpiredEvent event) throws IOException, ServletException {HashMap map = new HashMap<>();map.put("code",400);map.put("message","账号已在其他地方登录");//将信息json化String jsonString = JSON.toJSONString(map);HttpServletResponse response = event.getResponse();//返回json数据到前端response.setContentType("application/json;charset=UTF-8");response.getWriter().println(jsonString);}
}

 @Beanpublic SecurityFilterChain securityFilterChain(HttpSecurity httpSecurity) throws Exception {httpSecurity.sessionManagement(session ->session.maximumSessions(1).expiredSessionStrategy(new MySessionInformationExpiredStrategy()));//会话并发处理httpSecurity.cors(Customizer.withDefaults());//跨域处理httpSecurity.authorizeRequests(authorize -> authorize.anyRequest() //对所有请求开启授权保护.authenticated() //已认证的请求会自动授权);httpSecurity.formLogin(//Customizer.withDefaults()//使用表单授权方式//.httpBasic(Customizer.withDefaults());//使用基本授权方式form -> form.loginPage("/login").permitAll()//无需授权就能访问.usernameParameter("name").passwordParameter("pass").successHandler(new MyAuthenticationSuccessHandler())//认证成功的处理.failureHandler(new MyAuthenticationFailureHandler())//认证失败的处理);httpSecurity.logout(logout ->logout.logoutSuccessHandler(new MyLogoutSuccessHandler())//用户注销成功处理);httpSecurity.exceptionHandling(exception ->exception.authenticationEntryPoint(new MyAuthenticationEntryPoint()));//请求未认证处理httpSecurity.csrf(csrf -> csrf.disable());//关闭csrf功能return httpSecurity.build();}