mybatis拦截器，实现插入或更新数据，自动注入创建人，修改人信息

import java.lang.reflect.Field;
import java.util.Date;

import org.apache.ibatis.binding.MapperMethod.ParamMap;
import org.apache.ibatis.executor.Executor;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.plugin.Interceptor;
import org.apache.ibatis.plugin.Intercepts;
import org.apache.ibatis.plugin.Invocation;
import org.apache.ibatis.plugin.Signature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.ccl.order.api.user.entity.UserEntity;
import com.ccl.order.api.user.service.UserService;
import com.ccl.order.util.DataUtils;

import lombok.extern.slf4j.Slf4j;

/**
 * @ClassName: MybatisInterceptor
 * @Description:mybatis拦截器，自动注入创建人、创建时间、修改人、修改时间
 * @author: Ccl
 * @date: 2022年5月3日 上午10:05:06
 * @Copyright:
 */
@Slf4j
@Component
@Intercepts({ @Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }) })
public class MybatisInterceptor implements Interceptor {
    
    @Autowired
    UserService userService;

    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        // TODO Auto-generated method stub
        MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
        SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();
        Object parameter = invocation.getArgs()[1];
        if (parameter == null) {
            return invocation.proceed();
        }
        //sql命令类型为插入,自动注入创建人信息
        if (SqlCommandType.INSERT == sqlCommandType) {
            UserEntity userEntity = userService.get_login_user();
            Field[] fields = DataUtils.getFields(parameter.getClass());
            for (Field field : fields) {
                log.debug("------field.name------" + field.getName());
                try {
                    // 注入创建用户id
                    if ("createUserId".equals(field.getName())) {
                        field.setAccessible(true);
                        Object local_createBy = field.get(parameter);
                        field.setAccessible(false);
                        if (local_createBy == null || local_createBy.equals("")) {
                            if (userEntity != null) {
                                // 登录人账号
                                field.setAccessible(true);
                                field.set(parameter, userEntity.getId());
                                field.setAccessible(false);
                            }
                        }
                    }
                    // 注入创建时间
                    if ("createTime".equals(field.getName())) {
                        field.setAccessible(true);
                        Object local_createDate = field.get(parameter);
                        field.setAccessible(false);
                        if (local_createDate == null || local_createDate.equals("")) {
                            field.setAccessible(true);
                            field.set(parameter, new Date());
                            field.setAccessible(false);
                        }
                    }
                    // 注入公司id
                    if ("companyId".equals(field.getName())) {
                        field.setAccessible(true);
                        Object local_sysOrgCode = field.get(parameter);
                        field.setAccessible(false);
                        if (local_sysOrgCode == null || local_sysOrgCode.equals("")) {
                            if (userEntity != null) {
                                field.setAccessible(true);
                                field.set(parameter, userEntity.getCompanyId());
                                field.setAccessible(false);
                            }
                        }
                    }
                } catch (Exception e) {
                }
            }
        }
        //sql命令类型为更新,自动注入修改人信息
        if (SqlCommandType.UPDATE == sqlCommandType) {
            UserEntity userEntity = userService.get_login_user();
            Field[] fields = null;
            if (parameter instanceof ParamMap) {
                ParamMap<?> paramMap = (ParamMap<?>) parameter;
                if (paramMap.containsKey("et")) {
                    parameter = paramMap.get("et");
                } else {
                    parameter = paramMap.get("param1");
                }
                fields = DataUtils.getFields(parameter.getClass());
            } else {
                fields = DataUtils.getFields(parameter.getClass());
            }
            for (Field field : fields) {
                try {
                    if ("updateUserId".equals(field.getName())) {
                        if (userEntity != null) {
                            field.setAccessible(true);
                            field.set(parameter, userEntity.getId());
                            field.setAccessible(false);
                        }
                    }
                    if ("updateTime".equals(field.getName())) {
                        field.setAccessible(true);
                        field.set(parameter, new Date());
                        field.setAccessible(false);
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
        return invocation.proceed();
    }

}