设置登陆的用户名和密码

第一种方式：通过配置文件

spring.security.user.name=atguigu
spring.security.user.password=atguigu

第二种方式：通过配置类

package com.atguigu.securitydemo1.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 {@Overrideprotected void configure(AuthenticationManagerBuilder auth) throws Exception {BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();String password = passwordEncoder.encode("123");auth.inMemoryAuthentication().withUser("lucy").password(password).roles("admin");}//密码要加密，可是要用到PasswordEncoder这个接口，
//所以我们要给这个接口创建一个对象，因为它做加密的时候要找这个对象
//找不到就要报错！！！@BeanPasswordEncoder password(){return new BCryptPasswordEncoder();}
}

第三种方式：自定义编写实现类

第一步 创建配置类，设置使用哪一个userDetailsService实现类

package com.atguigu.securitydemo1.config;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.builders.WebSecurity;
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 SecurityConfigTest extends WebSecurityConfigurerAdapter {@Autowiredprivate UserDetailsService userDetailsService;@Overrideprotected void configure(AuthenticationManagerBuilder auth) throws Exception {auth.userDetailsService(userDetailsService).passwordEncoder(password());}@BeanPasswordEncoder password(){return new BCryptPasswordEncoder();}
}

第二步 编写实现类，返回User对象，User对象有用户名密码和操作权限

package com.atguigu.securitydemo1.service;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.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;import java.util.List;@Service("userDetailsService")
public class MyUserDetailsService implements UserDetailsService {@Overridepublic UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {List<GrantedAuthority> auths = AuthorityUtils.commaSeparatedStringToAuthorityList("rold");return new User("marry",new BCryptPasswordEncoder().encode("123"),auths);}
}