为什么我这个会是空指针呢？

Question

我的实体类user实现了UserDetails，然后代码是这样的：

package com.yxl.stage.entity;

import com.baomidou.mybatisplus.annotation.IdType;
import com.baomidou.mybatisplus.annotation.TableField;
import com.baomidou.mybatisplus.annotation.TableId;
import com.baomidou.mybatisplus.annotation.TableName;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Getter;
import lombok.Setter;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.thymeleaf.util.StringUtils;

@Getter
@Setter
@TableName("user")
@ApiModel(value = "User对象", description = "")
public class User implements Serializable, UserDetails {

    private static final long serialVersionUID = 1L;

    @TableId(value = "u_id", type = IdType.AUTO)
    private Integer uId;

    @TableField("u_username")
    private String uUsername;

    @TableField("u_pwd")
    private String uPwd;

    @TableField("u_status")
    private Integer uStatus;

    @TableField("u_level")
    private Integer uLevel;

    @TableField("u_score")
    private Integer uScore;

    @TableField("u_name")
    private String uName;

    @TableField("u_email")
    private String uEmail;

    @TableField("u_phone")
    private String uPhone;

    @ApiModelProperty("0-女，1-男")
    @TableField("u_sex")
    private Integer uSex;

    @TableField(exist = false)
    private List<Role> roles;

    @Override
    public Collection<? extends GrantedAuthority> getAuthorities() {
        List<SimpleGrantedAuthority> authorities = roles
                .stream()
                .map(role -> new SimpleGrantedAuthority(role.getName()))
                .collect(Collectors.toList());
        return authorities;
    }


    @Override
    public String getPassword() {
        return new BCryptPasswordEncoder().encode(uPwd);
    }

    @Override
    public String getUsername() {
        return uUsername;
    }


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

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

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

    @Override
    public boolean isEnabled() {
        if (uStatus == 1){
            return true;
        }
        return false;

    }
}

下面是报错信息

表里的数据也不空啊，为什么会是空指针呢？是写少了什么东西吗？还是哪里错了

Answer 1

不使用lombok插件试试，自己进行自动生成一下get set