springbootSecurity自定义登录

然后，对密码进行加密

紧接着，要对用户进行认证，对特定的Authentication进行认正

再然后，用configure(AuthenticationManagerBuilder)来使AuthenticationProvider容易地添加来建立认证机制，也就是说用来记录账号，密码，角色信息
之后实现UserDetailsService接口，但是实现这个接口后我们会发现其返回参数是UserDetails类型，这就需要我们去实现改接口，并将账号密码相关的实体类放进去，

package hkyxg.education.entity;

import com.alibaba.fastjson.annotation.JSONField;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

import java.util.ArrayList;
import java.util.Collection;

import org.springframework.security.core.authority.SimpleGrantedAuthority;

import java.util.List;
import java.util.stream.Collectors;



@Data
@NoArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = true)
public class LoginUser implements UserDetails {

    private User user;

    //存储权限信息
    private List permissions;


    public LoginUser(User user, List permissions) {
        this.user = user;
        this.permissions = permissions;
    }

    //存储SpringSecurity所需要的权限信息的集合
    @JSONField(serialize = false)
    private List authorities;

    @Override
    public Collection getAuthorities() {
        if (authorities != null) {
            return authorities;
        }
        //把permissions中String类型的权限信息封装成SimpleGrantedAuthority对象
       authorities = new ArrayList<>();
        for (String permission : permissions) {
            SimpleGrantedAuthority authority = new SimpleGrantedAuthority(permission);
            authorities.add(authority);
        }
        return authorities;
    }

    @Override
    public String getPassword() {
        return user.getPassword();
    }

    @Override
    public String getUsername() {
        return user.getUserName();
    }

    @Override
    public boolean isAccountNonExpired() {
        return true;
    }

    @Override
    public boolean isAccountNonLocked() {
        return true;
    }

    @Override
    public boolean isCredentialsNonExpired() {
        return true;
    }

    @Override
    public boolean isEnabled() {
        return true;
    }
}

然后就可以去实现UserDetailsService接口定义方法，从数据库中获取信息进行登录，之后返回给security

在登录接口的impl层，我们用

UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(userName, password);
            Authentication authenticate = authenticationManager.authenticate(authenticationToken);

来判断security中是否有该用户的信息来进行验证，如果没有则说明用户名或密码错误，有则通过

 LoginUser loginUser = (LoginUser) authenticate.getPrincipal();

来进行获取即可。