新增：

1.用户登录时判断租户是否过期，在登录时赋予 token有效期为当前租户到期时间和当前日期的差值；
2.实现租户名查 租户 Id 接口

src/main/java/com/yupi/springbootinit/service/impl/SystemTenantServiceImpl.java

@@ -0,0 +1,33 @@
+package com.yupi.springbootinit.service.impl;
+
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
+import com.yupi.springbootinit.common.BaseResponse;
+import com.yupi.springbootinit.common.ErrorCode;
+import com.yupi.springbootinit.exception.BusinessException;
+import org.springframework.stereotype.Service;
+import org.springframework.beans.factory.annotation.Autowired;
+import java.util.List;
+import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
+import com.yupi.springbootinit.model.entity.SystemTenant;
+import com.yupi.springbootinit.mapper.SystemTenantMapper;
+import com.yupi.springbootinit.service.SystemTenantService;
+/*
+* @author: ziin
+* @date: 2025/6/20 14:50
+*/
+    
+@Service
+public class SystemTenantServiceImpl extends ServiceImpl<SystemTenantMapper, SystemTenant> implements SystemTenantService{
+
+    @Override
+    public Long getTenantIdByName(String name) {
+        QueryWrapper<SystemTenant> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("name",name);
+        SystemTenant systemTenant = baseMapper.selectOne(queryWrapper);
+        if (systemTenant == null){
+            throw new BusinessException(ErrorCode.TENANT_NAME_NOT_EXISTS);
+        }
+        return systemTenant.getId();
+
+    }
+}