使用Spring Boot实现OAuth2认证

使用Spring Boot实现OAuth2认证

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1. 什么是OAuth2认证？

OAuth2是一种开放标准，允许用户授权第三方应用访问他们存储在服务提供者上的信息，而无需将用户名和密码提供给第三方应用。在现代应用程序中，OAuth2已成为实现安全身份验证和授权的重要协议。

2. 使用Spring Boot实现OAuth2认证

在Spring Boot中，我们可以利用Spring Security和Spring Boot的OAuth2支持来实现OAuth2认证。

2.1 添加依赖

首先，我们需要在pom.xml文件中添加Spring Security和OAuth2依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>

2.2 配置OAuth2

在application.properties或application.yml中配置OAuth2相关信息：

spring.security.oauth2.client.registration.google.client-id=your-client-id
spring.security.oauth2.client.registration.google.client-secret=your-client-secret
spring.security.oauth2.client.registration.google.scope=profile,email

spring.security.oauth2.client.provider.google.authorization-uri=https://accounts.google.com/o/oauth2/auth
spring.security.oauth2.client.provider.google.token-uri=https://oauth2.googleapis.com/token
spring.security.oauth2.client.provider.google.user-info-uri=https://www.googleapis.com/oauth2/v3/userinfo
spring.security.oauth2.client.provider.google.user-name-attribute=name

替换your-client-id和your-client-secret为你的实际Google OAuth2应用程序的客户端ID和客户端密钥。

2.3 创建Spring Security配置类

创建一个配置类来配置Spring Security和OAuth2：

package cn.juwatech.oauth2.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.oauth2.client.oidc.userinfo.OidcUserService;
import org.springframework.security.oauth2.client.registration.ClientRegistration;
import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
import org.springframework.security.oauth2.core.oidc.user.OidcUser;
import org.springframework.security.web.SecurityFilterChain;

@Configuration
@EnableWebSecurity
public class OAuth2Config {

    @Bean
    public ClientRegistrationRepository clientRegistrationRepository() {
        return new ClientRegistrationRepository() {
            @Override
            public ClientRegistration findByRegistrationId(String registrationId) {
                return null; // Implement based on your OAuth2 provider
            }
        };
    }

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http
            .authorizeRequests(authorizeRequests ->
                authorizeRequests
                    .antMatchers("/", "/error").permitAll()
                    .anyRequest().authenticated()
            )
            .oauth2Login(oauth2Login ->
                oauth2Login
                    .userInfoEndpoint().oidcUserService(oidcUserService())
            );
        return http.build();
    }

    @Bean
    public OidcUserService oidcUserService() {
        return new OidcUserService() {
            @Override
            public OidcUser loadUser(OidcUserRequest userRequest) throws OAuth2AuthenticationException {
                return null; // Implement based on your OAuth2 provider
            }
        };
    }
}