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

@Configuration
public class SecurityConfig {
    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();// 加密方式
    }
}

@Service
public class ResUserBizImpl implements ResUserBiz{
    @Autowired
    private ResUserMapper resUserMapper;

    // 注入加密器
    @Autowired
    private PasswordEncoder passwordEncoder;

    @Override
    public int register(ResUserVO user) {
        //需要先查詢是否已經(jīng)存在相同用戶名
        // 創(chuàng)建條件構(gòu)造器
        QueryWrapper<Resuser> queryWrapper = new QueryWrapper<>();
        // 添加條件：用戶名
        queryWrapper.eq("username", user.getUsername());
        if (resUserMapper.selectOne(queryWrapper) != null) {
            // 已經(jīng)存在相同用戶名
            throw new RuntimeException("用戶名"+user.getUsername()+"已存在");
        }
        Resuser resuser = new Resuser();
        resuser.setUsername(user.getUsername());
        // 對(duì)密碼進(jìn)行加密
        String encodedPassword = passwordEncoder.encode(user.getPwd());
        System.out.println("加密后的密碼為："+encodedPassword);
        resuser.setPwd(encodedPassword);
        resuser.setEmail(user.getEmail());
        resUserMapper.insert(resuser);
        return resuser.getUserid();
    }
}

ALTER TABLE your_table MODIFY COLUMN pwd VARCHAR(255);

    @Override
    public Resuser searchUser(ResUserVO user) {
        QueryWrapper<Resuser> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq("username",user.getUsername());
        String pwd = user.getPwd();
        Resuser resuser = resUserMapper.selectOne(queryWrapper);
        if (resuser != null){
            //使用matches方法比較明文和加密后的密碼是否匹配
            if (passwordEncoder.matches(pwd,resuser.getPwd()))
                return resuser;
        }
        return null;
    }