對於沒有訪問權限的用戶需要轉到登錄表單頁面。要實現訪問控制的方法多種多樣,可以通過Aop、攔截器實現,也可以通過框架實現(如:Apache Shiro、Spring Security)。
pom.xml添加依賴
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
創建SpringSecurity配置類
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/", "/home").permitAll()
.anyRequest().authenticated()
.and()
.formLogin()
.loginPage("/login")
.permitAll()
.and()
.logout()
.permitAll();
}
@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
//inMemoryAuthentication 從內存中獲取
auth
.inMemoryAuthentication()
.passwordEncoder(new BCryptPasswordEncoder())
.withUser("admin")
.password(new BCryptPasswordEncoder()
.encode("123456")).roles("USER");
}
}
通過@EnableWebSecurity註解開啓Spring Security的功能
繼承WebSecurityConfigurerAdapter,並重寫它的方法來設置一些web安全的細節
configure(HttpSecurity http)方法,通過authorizeRequests()定義哪些URL需要被保護、哪些不需要被保護。例如以上代碼指定了/和/home不需要任何認證就可以訪問,其他的路徑都必須通過身份驗證。
通過formLogin()定義當需要用戶登錄時候,轉到的登錄頁面。
configureGlobal(AuthenticationManagerBuilder auth)方法,在內存中創建了一個用戶,該用戶的名稱爲admin,密碼爲123456,用戶角色爲USER。
控制器:
@Controller
public class HelloController {
@RequestMapping("/")
public String index() {
return "index";
}
@RequestMapping("/hello")
public String hello() {
return "hello";
}
@RequestMapping(value = "/login", method = RequestMethod.GET)
public String login() {
return "login";
}
}
index.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Spring Security入門</title>
</head>
<body>
<h1>歡迎使用Spring Security!</h1>
<p>點擊 <a th:href="@{/hello}">這裏</a> 打個招呼吧</p>
</body>
</html>
hello.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<h1 th:inline="text">Hello [[${#httpServletRequest.remoteUser}]]!</h1>
<form th:action="@{/logout}" method="post">
<input type="submit" value="註銷"/>
</form>
</body>
</html>
login.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Spring Security Example </title>
</head>
<body>
<div th:if="${param.error}">
用戶名或密碼錯
</div>
<div th:if="${param.logout}">
您已註銷成功
</div>
<form th:action="@{/login}" method="post">
<div><label> 用戶名 : <input type="text" name="username"/> </label></div>
<div><label> 密 碼 : <input type="password" name="password"/> </label></div>
<div><input type="submit" value="登錄"/></div>
</form>
</body>
</html>
運行:
打開index.html,點擊這裏,如果沒有登錄進入登錄頁,已登錄跳轉到hello.html
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