Spring Security 6 & JWT Authentication · 课时

Spring Security 6 入门

探索 Spring Security 6 的基本概念和架构，了解其在保护 Web 应用方面的作用。

Spring Security 6 入门 是 CoddyKit 上的免费 Spring Security 6 & JWT Authentication 课时。这是第 1 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。

Welcome to Spring Security!

Time to lock down your Java apps. Spring Security 6 is the framework that handles authentication and access control so you don't roll your own.

What is Spring Security?

Spring Security is a customizable auth and access-control framework for Spring Boot apps. Authentication proves who you are; authorization decides what you can touch.

Why Security Matters

Unprotected apps invite unauthorized access, data breaches, and DoS. Spring Security gives you a battle-tested layer to shut those doors.

AuthN vs. AuthZ: Key Terms

Two terms, often confused: Authentication proves who you are (username + password), while authorization decides what you're allowed to do. Spring handles both.

Spring Security's Core Approach

Under the hood, Spring Security runs as a chain of servlet filters. Every request passes through them, each one handling one job: auth, authz, sessions.

The Security Filter Chain

The FilterChainProxy intercepts each HTTP request and runs it through an ordered series of security filters before it ever hits your controllers.

Understanding the SecurityContext

Once authenticated, a user's identity and roles live in the SecurityContext, managed by SecurityContextHolder. That's how Spring knows who's logged in.

Default Spring Boot Security

Just add spring-boot-starter-security and Boot locks down every endpoint with a generated login page — security on by default, no config needed.

Default Security in Action

Add Spring Security to a minimal Boot app and hit the root URL — it redirects you straight to a generated login page. The code below shows the setup.

package com.coddykit;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@RestController
public class SecurityIntroApplication {

  public static void main(String[] args) {
    SpringApplication.run(SecurityIntroApplication.class, args);
  }

  @GetMapping("/")
  public String home() {
    return "Welcome to a secured application!";
  }
}

Check Your Understanding

Let's test your grasp of the core concepts we've covered.

Recap: Spring Security Basics

Recap: Spring Security guards Java apps, separates authentication from authorization, and runs every request through a filter chain — protected out of the box with Boot.

常见问题解答

「Spring Security 6 入门」课时是免费的吗？

是的 — 「Spring Security 6 入门」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。

「Spring Security 6 入门」这节课中我会学到什么？

探索 Spring Security 6 的基本概念和架构，了解其在保护 Web 应用方面的作用。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 1 节课，共 4 节。

「Spring Security 6 入门」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

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