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我將開發一個使用spring啓動和安全性的登錄頁面，用戶和角色可以由admin創建，因此係統可以有多個角色和用戶...也可以分配admin角色給用戶並刪除它們。 我已經使用了很好的示例來說明如何實現它，但在閱讀了如此多的文檔和教程後，仍然存在以下問題，並且不知道實現彈簧安全性和引導的最佳做法是什麼。嘗試在調試模式中找出一步一步地發生在場景後面的事情。Spring Boot和安全動態身份驗證和授權
我的假設是針對每個http請求應用程序引用WebSecurityConfig類來檢查訪問，但令人驚訝的是，它不是那樣的，而且其他人如下所示。似乎應用程序一開始就會配置類，並且每個東西都會填充。 bootstrap在後臺做了很多動作，它讓我感到困惑，無法理解類之間的關係。
configureGlobal - > configure - >無論你寫爲URL進入/登錄） - >控制器（登錄方法） - >用user/pass提交表單 - > loadUserByUsername - > controller （歡迎使用方法） - > welcome.jsp
1--什麼是configureGlobal和configure在應用程序加載時執行的操作？
2-什麼是AuthenticationManagerBuilder的確切作用？
3-spring spring security知道如何發送用戶/將表單子傳遞給loadUserByUsername方法後？
4-loadUserByUsername返回用戶對象到哪裏？因爲當方法到達最後時，它將重定向到控制器歡迎方法，並在用戶名和密碼正確時向您發送歡迎方法。
4 - 如何使用grantedAuthorities根據他的角色將用戶重定向到不同的頁面？
<%@ 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類
@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類
@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類
@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，你的問題太廣泛了。在你遇到的問題中更具體一些，展示你的嘗試並一次提出一個問題。 – jfneis