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                # 一。通過配置文件 ``` # application.yml spring: security: user: name: admin password: admin ``` # 二。通過配置類 1. 創建一個SecurityConfig 類 繼承 WebSecurityConfigurerAdapter 并且 添加@Configuration 注解 2. 重寫 protected void configure(AuthenticationManagerBuilder auth) 方法 3. 把PasswordEncoder 的實現類加載到Bean中 ``` package cn.maicaii.security.config; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder; import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder; import org.springframework.security.crypto.password.PasswordEncoder; @Configuration public class SecurityConfig extends WebSecurityConfigurerAdapter { @Override protected void configure(AuthenticationManagerBuilder auth) throws Exception { auth. inMemoryAuthentication() .withUser("admin") .password(passwordEncoder().encode("123")) .roles("admin"); } @Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(); } } ``` # 三。通過實現類 1. 創建一個SecurityConfig 類 編寫使用哪個 UserDetailsService實現類 ``` import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder; import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter; import org.springframework.security.core.userdetails.UserDetailsService; import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder; import org.springframework.security.crypto.password.PasswordEncoder; @Configuration public class SecurityConfig extends WebSecurityConfigurerAdapter { @Autowired private UserDetailsService userDetailsService; @Override protected void configure(AuthenticationManagerBuilder auth) throws Exception { auth .userDetailsService(userDetailsService) .passwordEncoder(passwordEncoder()); } @Bean public PasswordEncoder passwordEncoder() { return new BCryptPasswordEncoder(); } } ``` 2. 編寫 UserDetailsService實現類 實現 loadUserByUsername 返回User對象 ``` import org.springframework.beans.factory.annotation.Autowired; import org.springframework.security.core.GrantedAuthority; import org.springframework.security.core.authority.AuthorityUtils; import org.springframework.security.core.userdetails.User; import org.springframework.security.core.userdetails.UserDetails; import org.springframework.security.core.userdetails.UserDetailsService; import org.springframework.security.core.userdetails.UsernameNotFoundException; import org.springframework.security.crypto.password.PasswordEncoder; import org.springframework.stereotype.Service; import java.util.List; @Service("userDetailsService") public class UserDetailsServiceImpl implements UserDetailsService { @Autowired private PasswordEncoder passwordEncoder; @Override public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException { // 權限 List<GrantedAuthority> role = AuthorityUtils.commaSeparatedStringToAuthorityList("role"); User user = new User( "admin", passwordEncoder.encode("123"), role ); return user; } } ```
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