貌似Struts2 標簽都快忘光了 今天先來一發struts2的select標簽：
首先從簡到難，靜態賦值：
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1
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<
s
:
select
name
=
"user.sex"
list
=
"#{'0':'男','1':'女'}"
label
=
"性別"
headerKey
=
""
headerValue
=
"請選擇性別"
>
<
/
s
:
select
>
|
這樣就會出現下拉框，默認是請選擇性別，點開后是男女，根據firebug，看到男女前面對應的是0和1，比起原生態的select標簽簡單多了。
注釋：這里從頁面來靜態構造下拉選項，關鍵點是list=”#{‘0′:’男’,’1′:’女’}” 通過它實現的select的兩個option 。headerKey指定默認的選項”key”,headerValue指定默認的選項”value”。
再看看設置下拉列表的數據：
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<%
java
.
util
.
HashMap
map
=
new
java
.
util
.
LinkedHashMap
(
)
;
map
.
put
(
1
,
"A公司"
)
;
map
.
put
(
2
,
"B公司"
)
;
map
.
put
(
3
,
"C公司"
)
;
request
.
setAttribute
(
"map"
,
map
)
;
request
.
setAttribute
(
"aa"
,
"D公司"
)
;
%>
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<
s
:
select
list
=
"#request.map"
label
=
"abc"
listKey
=
"key"
listValue
=
"value"
value
=
"#request.aa"
headerKey
=
"0"
headerValue
=
"aabb"
>
<
/
s
:
select
>
|
value的值設置為了2，所以初始化下拉框時，會自動選擇key值為2的選項。
最后，配合Struts2的action看看效果吧：
UserDao的代碼：
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@Repository
(
"userDao"
)
public
interface
UserDao
extends
SqlMapper
{
public
List
<User>
selectAll
(
)
;
public
User
getById
(
Integer
id
)
;
public
User
loginCheck
(
@Param
(
"loginName"
)
String
login_name
,
@Param
(
"password"
)
String
password
)
;
public
int
updateUser
(
User
user
)
;
public
int
deleteById
(
Integer
id
)
;
public
int
add
(
User
user
)
;
@Select
(
"SELECT a.*,b.* from users a ,orgs b where a.org_id = b.id"
)
public
List
<Map>
getUserInfo
(
)
;
@Select
(
"SELECT * from orgs ORDER BY id"
)
public
List
<Map>
getOrgs
(
)
;
}
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UserAction的代碼：
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@Action
(
"getuserinfo"
)
public
String
getAllUsers
(
)
{
List
<Map>
userList
=
userDao
.
getUserInfo
(
)
;
List
<Map>
orgs
=
userDao
.
getOrgs
(
)
;
if
(
userList
!=
null
)
{
ServletActionContext
.
getRequest
(
)
.
setAttribute
(
"userlist"
,
userList
)
;
ServletActionContext
.
getRequest
(
)
.
setAttribute
(
"orgs"
,
orgs
)
;
return
SUCCESS
;
}
else
{
return
ERROR
;
}
}
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試圖jsp頁面：
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<
div
class
=
"adduserbox"
>
<
div
class
=
"tit"
>新建帳號
<span>
X
<
/
span
>
<
/
div
>
<
form
action
=
"adduserinfo.feinno"
method
=
"post"
name
=
"saveForm"
id
=
"saveForm"
>
<
div
class
=
"content1"
>
<
div
class
=
"name"
>
<
div
class
=
"fields"
>姓名：
<
/
div
>
<
input
type
=
"text"
name
=
"name"
placeholder
=
"請輸入姓名"
autocomplete
=
"off"
>
<
/
div
>
<
div
class
=
"name"
>
<
div
class
=
"fields"
>電話：
<
/
div
>
<
input
type
=
"text"
name
=
"svc_url"
placeholder
=
"請輸入電話號碼"
autocomplete
=
"off"
>
<
/
div
>
<
div
class
=
"name"
>
<
div
class
=
"fields"
>公司：
<
/
div
>
<
s
:
select
name
=
"company"
list
=
"#request.orgs"
headerKey
=
""
headerValue
=
"請選擇公司"
listKey
=
"id"
listValue
=
"org_name"
>
<
/
s
:
select
>
<
/
div
>
<
div
class
=
"name"
>
<
div
class
=
"fields"
>郵箱：
<
/
div
>
<
input
type
=
"text"
name
=
"img_url"
placeholder
=
"請輸入郵箱地址"
autocomplete
=
"off"
>
<
/
div
>
<
div
class
=
"name"
>
<
div
class
=
"fields"
>登錄帳號：
<
/
div
>
<
input
type
=
"text"
name
=
"img_url"
placeholder
=
"請輸入登陸賬號"
autocomplete
=
"off"
>
<
/
div
>
<
div
class
=
"other"
>
<
button
class
=
"btn left blue"
id
=
"saveQuickService"
>保存
<
/
button
>
<
button
class
=
" write btn right"
id
=
"calcle"
>取消
<
/
button
>
<
/
div
>
<
/
div
>
<
/
form
>
<
/
div
>
|
這段代碼是jsp里面的一塊，點擊新增用戶彈出的彈出窗。
大家可以看到在“公司”這一個表單里的使用方法，首先給一個名稱name屬性，然后需要現實的List，list屬性，listKey說明下拉框的key值對應id(公司ID)字段，listValue說明下拉框的顯示部分對應org_name（公司名稱）字段。很簡單，很強大，很快捷。