mybatis逆向工程中复杂查询的调用步骤（利用example）

1.创建一个EmoloyeeExample对象

 EmployeeExample example = new EmployeeExample();

2.调用EmployeeExample对象的createCriteria（）方法得到criteria对象

EmployeeExample.Criteria criteria = example.createCriteria();

3.把参数传入Criteria的对应方法中

criteria.andEmpIdIn(ids);

4.调用mapper中的具体方法并传入EmployeeExample对象

employeeMapper.deleteByExample(example);

两个例子：1.

EmployeeExample example = new EmployeeExample();
        EmployeeExample.Criteria criteria = example.createCriteria();
        criteria.andEmpIdIn(ids);
        employeeMapper.deleteByExample(example);

2.

mployeeExample example = new EmployeeExample();
        EmployeeExample.Criteria criteria = example.createCriteria();
        criteria.andEmpNameEqualTo(empName);
        return employeeMapper.countByExample(example) == 0;