六 多對多查詢

實體類：

public

class
role
implements
serializable';
}}

public

class
user
implements
serializable';
}}

<?xml version="1.0" encoding="utf-8"?>

namespace
="com.liaoxiang.dao.iroledao"
>
"rolemap"
type
="role"
>
property
="roleid"
column
="rid"
>
id>
property
="rolename"
column
="role_name"
>
result
>
property
="roledesc"
column
="role_desc"
>
result
>
property
="users"
oftype
="user"
>
column
="id"
property
="id"
>
id>
column
="username"
property
="username"
>
result
>
column
="address"
property
="address"
>
result
>
column
="***"
property
="***"
>
result
>
column
="birthday"
property
="birthday"
>
result
>
collection
>
resultmap
>
"findall"
resultmap
="rolemap"
>
select u.*,r.id as rid,r.role_name,r.role_desc from role r
left outer join user_role ur on r.id = ur.rid
left outer join user u on u.id = ur.uid
select
>
>

@test

public
void
testfindall()
}角色資訊：role
使用者資訊：[user
, user
]角色資訊：role
使用者資訊：[user
]角色資訊：role
使用者資訊：[
]

<?xml version="1.0" encoding="utf-8"?>

namespace
="com.liaoxiang.dao.iuserdao"
>
"usermap"
type
="user"
>
property
="id"
column
="id"
>
id>
property
="username"
column
="username"
>
result
>
property
="address"
column
="address"
>
result
>
property
="***"
column
="***"
>
result
>
property
="birthday"
column
="birthday"
>
result
>
property
="roles"
oftype
="role"
>
property
="roleid"
column
="rid"
>
id>
property
="rolename"
column
="role_name"
>
result
>
property
="roledesc"
column
="role_desc"
>
result
>
collection
>
resultmap
>
"findall"
resultmap
="usermap"
>
select u.*,r.id as rid,r.role_name,r.role_desc from user u
left outer join user_role ur on u.id = ur.uid
left outer join role r on r.id = ur.rid
select
>
>

@test

public
void
testfindall()
}使用者資訊：user
使用者角色：[role
, role
]使用者資訊：user
使用者角色：[role
]使用者資訊：user
使用者角色：[
]使用者資訊：user
使用者角色：[
]

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