2.2.2、service层

• 在 Service 层中，调用 EmployeeMapper 接口中的方法。 ```java package com.wzy.service;

import com.wzy.dao.EmployeeMapper; import com.wzy.pojo.Employee; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service;

import java.util.List;

@Service public class EmployeesService { @Autowired private EmployeeMapper employeeMapper;

public List<Employee> getEmployeeAll() {
    return employeeMapper.selectByExampleWithDept(null);
}

}

```