Fanruan multi-condition parameter dynamic query, if there is a parameter, the parameter is empty

select * from dbo.student
where 1=1 ${if(len(stuName)==0,"","and stuName='"+stuName+"'")}
${if(len(stuNo)==0,"","and stuNo='"+stuNo+"'")}
--使用len()方法判断参数的值是否为空，如果为空则添加连接空字符串
--否则读取相应的参数值，进行查询，可实现多条件的添加
//这个是判断这个参数 是不是为空
${if(len(stuNo)==0,"","and stuNo='"+stuNo+"'")}
//这个是判断stuNo这个参数的数值
${if(stuNo==0,"","and stuNo='"+stuNo+"'")}




${if(len(Project_name)==0,"","AND Pro_Name LIKE '%"+Project_name+"%'")}
${if(len(Department_id)==0,"AND uDepart IN (SELECT ID FROM dbo.GetChild(101005))","AND uDepart IN (SELECT ID FROM dbo.GetChild("+Department_id+"))")}
${if(len(User_id)==0,"","AND Pro_UserId="+User_id+"")}