基于spring security实现登录注销功能过程解析

作者：炫舞风中时间：2023-11-29 06:09:05　

这篇文章主要介绍了基于spring security实现登录注销功能过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

1、引入maven依赖

<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>

2、Security 配置类说明登录方式、登录页面、哪个url需要认证、注入登录失败/成功过滤器

@Configuration
public class BrowserSecurityConfig extends WebSecurityConfigurerAdapter {

/**
* 注入 Security 属性类配置
*/
@Autowired
private SecurityProperties securityProperties;

/**
* 注入自定义的登录成功处理类
*/
@Autowired
private MyAuthenticationSuccessHandler mySuccessHandler;
/**
* 注入自定义的登录失败处理类
*/
@Autowired
private MyAuthenticationFailHandler myFailHandler;

/**
* 重写PasswordEncoder 接口中的方法，实例化加密策略
* @return 返回 BCrypt 加密策略
*/
@Bean
public PasswordEncoder passwordEncoder(){
return new BCryptPasswordEncoder();
}

@Override
protected void configure(HttpSecurity http) throws Exception {

//登录成功的页面地址
String redirectUrl = securityProperties.getLoginPage();
//basic 登录方式
// http.httpBasic()

//表单登录方式
http.formLogin()
.loginPage("/authentication/require")
//登录需要经过的url请求
.loginProcessingUrl("/authentication/form")
.successHandler(mySuccessHandler)
.failureHandler(myFailHandler)
.and()
//请求授权
.authorizeRequests()
//不需要权限认证的url
.antMatchers("/authentication/*",redirectUrl).permitAll()
//任何请求
.anyRequest()
//需要身份认证
.authenticated()
.and()
//关闭跨站请求防护
.csrf().disable();
//默认注销地址：/logout
http.logout().
//注销之后跳转的页面
logoutSuccessUrl("/authentication/require");
}

3、自定义登录成功和失败的处理器

（1）、登录成功

@Component
@Slf4j
public class MyAuthenticationSuccessHandler extends SavedRequestAwareAuthenticationSuccessHandler {
@Override
public void onAuthenticationSuccess(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Authentication authentication) throws IOException, ServletException {

logger.info("登录成功");
//将 authention 信息打包成json格式返回
httpServletResponse.setContentType("application/json;charset=UTF-8");
httpServletResponse.getWriter().write("登录成功");
} }

（2）、登录失败

@Component
@Slf4j
public class MyAuthenticationFailHandler extends SimpleUrlAuthenticationFailureHandler {
@Override
public void onAuthenticationFailure(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, AuthenticationException e) throws IOException, ServletException {
logger.info("登录失败");

//设置状态码
httpServletResponse.setStatus(500);
//将登录失败信息打包成json格式返回
httpServletResponse.setContentType("application/json;charset=UTF-8");
httpServletResponse.getWriter().write("登录失败："+e.getMessage());
} }

4、UserDetail 类加载用户数据 , 返回UserDetail 实例（里面包含用户信息）

@Component
@Slf4j
public class MyUserDetailsService implements UserDetailsService {

@Autowired
private PasswordEncoder passwordEncoder;

/**
* 根据进行登录
* @param username
* @return
* @throws UsernameNotFoundException
*/
@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
log.info("登录用户名:"+username);
String password = passwordEncoder.encode("123456");
//User三个参数 (用户名+密码+权限)
//根据查找到的用户信息判断用户是否被冻结
log.info("数据库密码:"+password);
return new User(username,password, AuthorityUtils.commaSeparatedStringToAuthorityList("admin"));
}
}

5、登录路径请求类，.loginPage("/authentication/require")

@RestController
@Slf4j
@ResponseStatus(code = HttpStatus.UNAUTHORIZED)
public class BrowerSecurityController {

/**
* 把当前的请求缓存到 session 里去
*/
private RequestCache requestCache = new HttpSessionRequestCache();

/**
* 重定向策略
*/
private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();

/**
* 注入 Security 属性类配置
*/
@Autowired
private SecurityProperties securityProperties;

/**
* 当需要身份认证时跳转到这里
*/
@RequestMapping("/authentication/require")
public SimpleResponse requireAuthentication(HttpServletRequest request, HttpServletResponse response) throws IOException {
//拿到请求对象
SavedRequest savedRequest = requestCache.getRequest(request, response);
if (savedRequest != null){
//获取跳转url
String targetUrl = savedRequest.getRedirectUrl();
log.info("引发跳转的请求是:"+targetUrl);

//判断 targetUrl 是不是 .html结尾, 如果是：跳转到登录页(返回view)
if (StringUtils.endsWithIgnoreCase(targetUrl,".html")){
String redirectUrl = securityProperties.getLoginPage();
redirectStrategy.sendRedirect(request,response,redirectUrl);
}
}
//如果不是，返回一个json 字符串
return new SimpleResponse("访问的服务需要身份认证，请引导用户到登录页");
}