Spring Security 6 & JWT Authentication · 课时

使用 Granted Authorities 实现基于角色的授权

从数据库完成用户身份验证后，学习使用角色和权限对用户进行授权，在 Spring Security 中保护端点和方法

使用 Granted Authorities 实现基于角色的授权 是 CoddyKit 上的免费 Spring Security 6 & JWT Authentication 课时。这是第 4 节课，共 4 节。你可以在下方免费阅读本课时的完整内容 — 然后在浏览器中使用内置代码编辑器和全天候 AI 导师进行实践。这是 Spring Security 6 & JWT Authentication 学习路径的一部分，你的进度在网页和 CoddyKit 应用中同步。 Spring Security 6 & JWT Authentication 课程共包含 4 节课。

本课时的部分内容尚未翻译，以英文显示。

Authentication vs Authorization

You can now load users from a database and verify passwords. That is authentication (who you are). The next question is authorization (what you may do), driven by roles and authorities.

Authorities and Roles

Spring represents permissions as GrantedAuthority objects. A role is just an authority with a ROLE_ prefix, e.g. ROLE_ADMIN.

Assigning Authorities to a User

When building your UserDetails, attach the authorities the user holds.

User.withUsername('alice')
    .password(encoded)
    .roles('ADMIN', 'USER')
    .build();

Securing URLs by Role

In the filter chain, restrict paths with hasRole. Spring adds the ROLE_ prefix for you here.

http.authorizeHttpRequests(a -> a
    .requestMatchers('/admin/**').hasRole('ADMIN')
    .anyRequest().authenticated());

Requiring Specific Authorities

For finer control use hasAuthority, which matches the authority string exactly with no prefix added.

http.authorizeHttpRequests(a -> a
    .requestMatchers('/reports/**').hasAuthority('REPORT_READ'));

Multiple Allowed Roles

hasAnyRole permits access if the user has at least one of several roles.

http.authorizeHttpRequests(a -> a
    .requestMatchers('/staff/**').hasAnyRole('ADMIN', 'MANAGER'));

Method-Level Security

Enable annotation-based security to protect service methods, not just URLs.

@EnableMethodSecurity
@Configuration
public class SecurityConfig { }

Using @PreAuthorize

@PreAuthorize runs a SpEL expression before the method executes, blocking unauthorized callers.

@PreAuthorize("hasRole('ADMIN')")
public void deleteUser(Long id) { }

Checking the Current User

SpEL can reference the authenticated principal, e.g. to allow users to edit only their own data.

@PreAuthorize("#username == authentication.name")
public void updateProfile(String username) { }

Mapping DB Roles to Authorities

In your UserDetailsService, convert role rows from the database into SimpleGrantedAuthority objects so authorization rules apply.

var auths = roles.stream()
    .map(r -> new SimpleGrantedAuthority('ROLE_' + r))
    .toList();

Putting It Together

The full picture: authenticate from the DB, map roles to authorities, secure URLs with hasRole/hasAuthority, and protect methods with @PreAuthorize.

Quick Check

What is the difference between hasRole('ADMIN') and hasAuthority('ADMIN')?

Recap

You can now control what authenticated users may do:

Roles are authorities with a ROLE_ prefix
hasRole/hasAnyRole vs exact hasAuthority
@EnableMethodSecurity + @PreAuthorize for method-level rules
Map DB roles to SimpleGrantedAuthority in your UserDetailsService

常见问题解答

「使用 Granted Authorities 实现基于角色的授权」课时是免费的吗？

是的 — 「使用 Granted Authorities 实现基于角色的授权」的完整文本可在网页上免费阅读。要进行交互式练习（内置代码编辑器和全天候 AI 导师）并解锁 Spring Security 6 & JWT Authentication 课程的其余内容，请升级到 CoddyKit PRO。 Spring Security 6 & JWT Authentication 课程共包含 4 节课。

「使用 Granted Authorities 实现基于角色的授权」这节课中我会学到什么？

从数据库完成用户身份验证后，学习使用角色和权限对用户进行授权，在 Spring Security 中保护端点和方法你通过在浏览器中直接运行的动手代码来练习 Spring Security 6 & JWT Authentication，全天候 AI 导师会在你学习这节课的过程中回答你的问题。

学习 Spring Security 6 & JWT Authentication 需要有经验吗？

无需任何先前经验。CoddyKit 上的 Spring Security 6 & JWT Authentication 课程适合初学者到高级学习者，你可以从这里开始或从头开始，按照自己的节奏学习。这是第 4 节课，共 4 节。

「使用 Granted Authorities 实现基于角色的授权」课时需要多长时间？

大多数 CoddyKit 课程大约需要 5–10 分钟。每节课都很精短且互动，所以你能稳步进步，并在网页和应用中从离开的地方继续。

我能在这节 Spring Security 6 & JWT Authentication 课中编写并运行代码吗？

能。每节 Spring Security 6 & JWT Authentication 课都包含内置代码编辑器，你可以在浏览器中直接编写并运行真实代码，并获得即时 AI 反馈 — 无需本地设置。

此课程中的所有课时

自定义 UserDetailsService 实现
了解密码编码器
集成数据库用户管理
使用 Granted Authorities 实现基于角色的授权

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