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我将开发一个使用spring启动和安全性的登录页面，用户和角色可以由admin创建，因此系统可以有多个角色和用户...也可以分配admin角色给用户并删除它们。 我已经使用了很好的示例来说明如何实现它，但在阅读了如此多的文档和教程后，仍然存在以下问题，并且不知道实现弹簧安全性和引导的最佳做法是什么。尝试在调试模式中找出一步一步地发生在场景后面的事情。Spring Boot和安全动态身份验证和授权
我的假设是针对每个http请求应用程序引用WebSecurityConfig类来检查访问，但令人惊讶的是，它不是那样的，而且其他人如下所示。似乎应用程序一开始就会配置类，并且每个东西都会填充。 bootstrap在后台做了很多动作，它让我感到困惑，无法理解类之间的关系。
configureGlobal - > configure - >无论你写为URL进入/登录） - >控制器（登录方法） - >用user/pass提交表单 - > loadUserByUsername - > controller （欢迎使用方法） - > welcome.jsp
1--什么是configureGlobal和configure在应用程序加载时执行的操作？
2-什么是AuthenticationManagerBuilder的确切作用？
3-spring spring security知道如何发送用户/将表单子传递给loadUserByUsername方法后？
4-loadUserByUsername返回用户对象到哪里？因为当方法到达最后时，它将重定向到控制器欢迎方法，并在用户名和密码正确时向您发送欢迎方法。
4 - 如何使用grantedAuthorities根据他的角色将用户重定向到不同的页面？
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<c:set var="contextPath" value="${pageContext.request.contextPath}"/>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
<meta name="description" content="">
<meta name="author" content="">
<title>Log in with your account</title>
<link href="${contextPath}/resources/css/bootstrap.min.css" rel="stylesheet">
<link href="${contextPath}/resources/css/common.css" rel="stylesheet">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body>
<div class="container">
<form method="POST" action="${contextPath}/login" class="form-signin">
<h2 class="form-heading">Log in</h2>
<div class="form-group ${error != null ? 'has-error' : ''}">
<span>${message}</span>
<input name="username" type="text" class="form-control" placeholder="Username"
autofocus="true"/>
<input name="password" type="password" class="form-control" placeholder="Password"/>
<span>${error}</span>
<input type="hidden" name="${_csrf.parameterName}" value="${_csrf.token}"/>
<button class="btn btn-lg btn-primary btn-block" type="submit">Log In</button>
<h4 class="text-center"><a href="${contextPath}/registration">Create an account</a></h4>
</div>
</form>
</div>
<!-- /container -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="${contextPath}/resources/js/bootstrap.min.js"></script>
</body>
</html>WebSecurityConfig类
@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UserDetailsService userDetailsService;
@Bean
public BCryptPasswordEncoder bCryptPasswordEncoder() {
return new BCryptPasswordEncoder();
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/resources/**", "/registration").permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginPage("/login").permitAll()
.and()
.logout().permitAll();
}
@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
}
}
UserDetailsServiceImpl类
@Service
public class UserDetailsServiceImpl implements UserDetailsService{
@Autowired
private UserRepository userRepository;
@Override
@Transactional(readOnly = true)
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
User user = userRepository.findByUsername(username);
Set<GrantedAuthority> grantedAuthorities = new HashSet<>();
for (Role role : user.getRoles()){
grantedAuthorities.add(new SimpleGrantedAuthority(role.getName()));
}
return new org.springframework.security.core.userdetails.User(user.getUsername(), user.getPassword(), grantedAuthorities);
}
}
UserController类
@Controller
public class UserController {
@Autowired
private UserService userService;
@Autowired
private SecurityService securityService;
@Autowired
private UserValidator userValidator;
@RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registration(Model model) {
model.addAttribute("userForm", new User());
return "registration";
}
@RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(@ModelAttribute("userForm") User userForm, BindingResult bindingResult, Model model) {
userValidator.validate(userForm, bindingResult);
if (bindingResult.hasErrors()) {
return "registration";
}
userService.save(userForm);
securityService.autologin(userForm.getUsername(), userForm.getPasswordConfirm());
return "redirect:/welcome";
}
@RequestMapping(value = "/login", method = RequestMethod.GET)
public String login(Model model, String error, String logout) {
if (error != null)
model.addAttribute("error", "Your username and password is invalid.");
if (logout != null)
model.addAttribute("message", "You have been logged out successfully.");
return "login";
}
@RequestMapping(value = {"/", "/welcome"}, method = RequestMethod.GET)
public String welcome(Model model) {
return "welcome";
}
}
彼得，你的问题太广泛了。在你遇到的问题中更具体一些，展示你的尝试并一次提出一个问题。 – jfneis