Oracle start with用法实例之根据当前部门id递归查询该部门及子部门信息实例

1.实体bean(对应数据库表sys_dept结构为：dept_id、parent_id…)

public class Dept{

    private String deptId;          // 部门ID
    private String parentId;        // 上级部门ID
    ...
    (
    getter...
    setter...
    )
    ...

2.mybatis xml配置如下：

<select id="findList" resultType="HashMap">
    select 
    a.dept_id,
    a.parent_id
    from sys_dept a
    <where>
        <if test="deptId!= null and deptId!= ''">
            AND a.dept_id in
            (
            select 
            b.dept_id 
            from sys_dept b  where 1=1
            start with 
            b.dept_id= #{deptId}
            connect by prior b.dept_id=  b.parent_id
            )
        </if>
        <if test="parentId!= null and parentId!= ''">
            AND a.parent_id=#{parentId}
        </if>
    </where>
</select>