spingsecurity使用和说明

1、引入spingsecurity依赖

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

启动项目访问 http://localhost:8080/login  账号：user 密码：控制台系统生成的

2、配置自定义用户名密码

配置文件配置

# 应用服务 WEB 访问端口
server.port=8080

spring.security.user.name=admin
spring.security.user.password=123456

或者 方法中配置（优先级高）

package com.example.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 WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication().
                withUser("root"). // 用户名
                password(this.passwordEncoder().encode("123")) 密码
                .roles("admin");  //角色
    }

    @Bean
    PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}

3、获取当前登录用户信息

package com.example.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
import java.security.Principal;

@RestController
public class CurrentLoginUserInfoController {

    /**
     * 从当前请求对象中获取
     */
    @GetMapping("/getLoginUserInfo")
    public Principal getLoginUserInfo(Principal principle){
            return principle;
    }
    /**
     *从当前请求对象中获取
     */
    @GetMapping("/getLoginUserInfo1")
    public Authentication getLoginUserInfo1(Authentication authentication){
        return authentication;
    }

    /**
     * 从SecurityContextHolder获取
     * @return
     */
    @GetMapping("/getLoginUserInfo2")
    public Authentication getLoginUserInfo(){
        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
        return authentication;
    }
}