mybatis拦截器实现自动插入创建人、创建时间、修改人、修改时

package cn.tedu.ff_server.mybatis;

import cn.tedu.ff_server.security.LoginPrincipal;
import cn.tedu.ff_server.security.UserLoginDetails;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.plugin.*;

import java.lang.reflect.Field;
import java.time.LocalDateTime;
import java.util.Objects;
import java.util.Properties;
import org.apache.ibatis.executor.Executor;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;

@Slf4j
@Component
@Intercepts({@Signature(type = Executor.class, method = "update", args = {MappedStatement.class, Object.class}) })
public class AuditingInterceptor implements Interceptor {
    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        //获取到登录的用户名
        LoginPrincipal user = (LoginPrincipal) SecurityContextHolder.getContext().getAuthentication().getPrincipal();

        // 获取一个MappedStatement
        MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];

        // 获取SQL命令 UNKNOWN INSERT UPDATE SELECT DELETE
        SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();

        // 获取参数
        Object parameter = invocation.getArgs()[1];

        if (parameter == null) {
            return invocation.proceed();
        }

        // 获取私有成员变量
        Field[] fields = parameter.getClass().getDeclaredFields();

        if (SqlCommandType.INSERT.equals(sqlCommandType)) {
            for (Field field : fields) {
                if ("createName".equals(field.getName())) {
                    // 插入创建人
                    field.setAccessible(true);
                    field.set(parameter, user.getId());
                    field.setAccessible(false);
                }

                if ("createTime".equals(field.getName())) {
                    // 插入创建时间
                    field.setAccessible(true);
                    field.set(parameter, LocalDateTime.now());
                    field.setAccessible(false);
                }
            }
        }

        if (SqlCommandType.UPDATE.equals(sqlCommandType) || SqlCommandType.INSERT.equals(sqlCommandType)) {
            for (Field field : fields) {
                if ("updateName".equals(field.getName())) {
                    // 插入修改人
                    field.setAccessible(true);
                    field.set(parameter, user.getId());
                    field.setAccessible(false);
                }

                if ("updateTime".equals(field.getName())) {
                    // 插入修改时间
                    field.setAccessible(true);
                    field.set(parameter, LocalDateTime.now());
                    field.setAccessible(false);
                }
            }
        }

        return invocation.proceed();
    }

    @Override
    public Object plugin(Object target) {
        if (target instanceof Executor) {
            return Plugin.wrap(target, this);
        } else {
            return target;
        }

    }

    @Override
    public void setProperties(Properties properties) {
        Interceptor.super.setProperties(properties);
    }
}