mybatis自动注入审计，读jeecgboot

核心使用mybatis 的interceptor 实现。

优点是实现更优雅，零侵入性。比MetaObjectHandler实现更优雅，无需配置注解TableFiled。

MybatisInterceptor

/**
 * mybatis拦截器，自动注入创建人、创建时间、修改人、修改时间
 * @Author scott
 * @Date  2019-01-19
 *
 */
@Slf4j
@Component
@Intercepts({ @Signature(type = Executor.class, method = "update", args = { MappedStatement.class, Object.class }) })
public class MybatisInterceptor implements Interceptor {

	@Override
	public Object intercept(Invocation invocation) throws Throwable {
		MappedStatement mappedStatement = (MappedStatement) invocation.getArgs()[0];
		String sqlId = mappedStatement.getId();
		log.debug("------sqlId------" + sqlId);
		SqlCommandType sqlCommandType = mappedStatement.getSqlCommandType();
		Object parameter = invocation.getArgs()[1];
		log.debug("------sqlCommandTyp们ke------" + sqlCommandType);

		if (parameter == null) {
			return invocation.proceed();
		}
		if (SqlCommandType.INSERT == sqlCommandType) {
			LoginUser sysUser = this.getLoginUser();
			Field[] fields = oConvertUtils.getAllFields(parameter);
			for (Field field : fields) {
				log.debug("------field.name------" + field.getName());
				try {
					if ("createBy".equals(field.getName())) {
						field.setAccessible(true);
						Object localCreateBy = field.get(parameter);
						field.setAccessible(false);
						if (localCreateBy == null || "".equals(localCreateBy)) {
							if (sysUser != null) {
								// 登录人账号
								field.setAccessible(true);
								field.set(parameter, sysUser.getUsername());
								field.setAccessible(false);
							}
						}
					}
					// 注入创建时间
					if ("createTime".equals(field.getName())) {
						field.setAccessible(true);
						Object localCreateDate = field.get(parameter);
						field.setAccessible(false);
						if (localCreateDate == null || "".equals(localCreateDate)) {
							field.setAccessible(true);
							field.set(parameter, new Date());
							field.setAccessible(false);
						}
					}
					//注入部门编码
					if ("sysOrgCode".equals(field.getName())) {
						field.setAccessible(true);
						Object localSysOrgCode = field.get(parameter);
						field.setAccessible(false);
						if (localSysOrgCode == null || "".equals(localSysOrgCode)) {
							// 获取登录用户信息
							if (sysUser != null) {
								field.setAccessible(true);
								field.set(parameter, sysUser.getOrgCode());
								field.setAccessible(false);
							}
						}
					}

					//------------------------------------------------------------------------------------------------
					//注入租户ID（是否开启系统管理模块的多租户数据隔离【SAAS多租户模式】）
					if(MybatisPlusSaasConfig.OPEN_SYSTEM_TENANT_CONTROL) {
						if (TenantConstant.TENANT_ID.equals(field.getName())) {
							field.setAccessible(true);
							Object localTenantId = field.get(parameter);
							field.setAccessible(false);
							if (localTenantId == null) {
								field.setAccessible(true);
								field.set(parameter, oConvertUtils.getInt(TenantContext.getTenant(),0));
								field.setAccessible(false);
							}
						}
					}
					//------------------------------------------------------------------------------------------------
					
				} catch (Exception e) {
				}
			}
		}
		if (SqlCommandType.UPDATE == sqlCommandType) {
			LoginUser sysUser = this.getLoginUser();
			Field[] fields = null;
			if (parameter instanceof ParamMap) {
				ParamMap p = (ParamMap) parameter;
				//update-begin-author:scott date:20190729 for:批量更新报错issues/IZA3Q--
                String et = "et";
				if (p.containsKey(et)) {
					parameter = p.get(et);
				} else {
					parameter = p.get("param1");
				}
				//update-end-author:scott date:20190729 for:批量更新报错issues/IZA3Q-

				//update-begin-author:scott date:20190729 for:更新指定字段时报错 issues/#516-
				if (parameter == null) {
					return invocation.proceed();
				}
				//update-end-author:scott date:20190729 for:更新指定字段时报错 issues/#516-

				fields = oConvertUtils.getAllFields(parameter);
			} else {
				fields = oConvertUtils.getAllFields(parameter);
			}

			for (Field field : fields) {
				log.debug("------field.name------" + field.getName());
				try {
					if ("updateBy".equals(field.getName())) {
						//获取登录用户信息
						if (sysUser != null) {
							// 登录账号
							field.setAccessible(true);
							field.set(parameter, sysUser.getUsername());
							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();
	}

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

	@Override
	public void setProperties(Properties properties) {
		// TODO Auto-generated method stub
	}

	//update-begin--Author:scott  Date:20191213 for：关于使用Quzrtz 开启线程任务， #465
    /**
     * 获取登录用户
     * @return
     */
	private LoginUser getLoginUser() {
		LoginUser sysUser = null;
		try {
			sysUser = SecurityUtils.getSubject().getPrincipal() != null ? (LoginUser) SecurityUtils.getSubject().getPrincipal() : null;
		} catch (Exception e) {
			//e.printStackTrace();
			sysUser = null;
		}
		return sysUser;
	}
	//update-end--Author:scott  Date:20191213 for：关于使用Quzrtz 开启线程任务， #465

}

oConvertUtils 

	/**
	 * 获取类的所有属性，包括父类
	 * 
	 * @param object
	 * @return
	 */
	public static Field[] getAllFields(Object object) {
		Class clazz = object.getClass();
		List fieldList = new ArrayList<>();
		while (clazz != null) {
			fieldList.addAll(new ArrayList<>(Arrays.asList(clazz.getDeclaredFields())));
			clazz = clazz.getSuperclass();
		}
		Field[] fields = new Field[fieldList.size()];
		fieldList.toArray(fields);
		return fields;
	}