W3.JS W3日期
2020-11-05 17:01 更新
W3Data是什么？
W3Data 是一个将服务器数据带到 HTML 应用程序的工具。
W3Data 的目的是向 w3.js 提供来自 web 服务器的数据。
应用程序模型
W3Data 使用应用程序模型(用 JSON 编写)来描述服务器应用程序。
这个简单的模型描述了一个从数据库中检索数据的完整应用程序:
model_customers.js
{"database" : {
"connection" : "localmysql",
"sql" : "SELECT * FROM Customers"}}
"connection" : "localmysql",
"sql" : "SELECT * FROM Customers"}}
模型存储在服务器上，不能由 web 用户编辑。
您必须是服务器管理员或被赋予在服务器上编辑文件的权限的用户。
使用应用程序模型很简单，只需在调用 w3Http( ) 时将模型名称添加到 w3data.php:
实例
<script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_customers", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_customers", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
尝试一下 »
从文本文件中显示
实例
<script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_cd_from_txt", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_cd_from_txt", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
尝试一下 »
这是应用程序中使用的模型:
model_cd_from_txt
{"data" : {
"type" : "csvfile",
"filename" : "cd_catalog.txt",
"items" : [
{"name" : "title", "index" : 1},
{"name" : "artist", "index" : 2},
{"name" : "price", "index" : 5}]}}
"type" : "csvfile",
"filename" : "cd_catalog.txt",
"items" : [
{"name" : "title", "index" : 1},
{"name" : "artist", "index" : 2},
{"name" : "price", "index" : 5}]}}
这是逗号分隔的文本文件:
cd_catalog.txt
Empire Burlesque,Bob Dylan,USA,Columbia,10.90,1985
Hide your heart,Bonnie Tyler,UK,CBS Records,9.90,1988
Greatest Hits,Dolly Parton,USA,RCA,9.90,1982
Still got the blues,Gary Moore,UK,Virgin records,10.20,1990
Eros,Eros Ramazzotti,EU,BMG,9.90,1997
One night only,Bee Gees,UK,Polydor,10.90,1998
Sylvias Mother,Dr.Hook,UK,CBS,8.10,1973
Maggie May,Rod Stewart,UK,Pickwick,8.50,1990
Hide your heart,Bonnie Tyler,UK,CBS Records,9.90,1988
Greatest Hits,Dolly Parton,USA,RCA,9.90,1982
Still got the blues,Gary Moore,UK,Virgin records,10.20,1990
Eros,Eros Ramazzotti,EU,BMG,9.90,1997
One night only,Bee Gees,UK,Polydor,10.90,1998
Sylvias Mother,Dr.Hook,UK,CBS,8.10,1973
Maggie May,Rod Stewart,UK,Pickwick,8.50,1990
显示 JSON 文件
实例
<script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_cd_from_txt", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_cd_from_txt", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
尝试一下 »
这是应用程序中使用的模型:
model_cd_from_json.js
{"data" : {
"type" : "jsonfile",
"filename" : "cd_catalog.js",
"record" : "cd"
"items" : [
{"name" : "title", "nodename" : "title"},
{"name" : "artist", "nodename" : "artist"},
{"name" : "price", "nodename" : "price"}]}}
"type" : "jsonfile",
"filename" : "cd_catalog.js",
"record" : "cd"
"items" : [
{"name" : "title", "nodename" : "title"},
{"name" : "artist", "nodename" : "artist"},
{"name" : "price", "nodename" : "price"}]}}
这是 JSON 文件:
cd_catalog.js
{"cd" : [
{ "title" : "Empire Burlesque", "artist" : "Bob Dylan", "price" : "10.90" },
{ "title" : "Hide your heart", "artist" : "Bonnie Tyler", "price" : "9.90" },
{ "title" : "Greatest Hits", "artist" : "Dolly Parton", "price" : "9.90" },
{ "title" : "Still got the blues", "artist" : "Gary Moore", "price" : "10.20" },
{ "title" : "Eros", "artist" : "Eros Ramazzotti", "price" : "9.90" },
{ "title" : "One night only", "artist" : "Bee Gees", "price" : "10.90" },
{ "title" : "Sylvias Mother", "artist" : "Dr.Hook", "price" : "8.10" }]}
{ "title" : "Empire Burlesque", "artist" : "Bob Dylan", "price" : "10.90" },
{ "title" : "Hide your heart", "artist" : "Bonnie Tyler", "price" : "9.90" },
{ "title" : "Greatest Hits", "artist" : "Dolly Parton", "price" : "9.90" },
{ "title" : "Still got the blues", "artist" : "Gary Moore", "price" : "10.20" },
{ "title" : "Eros", "artist" : "Eros Ramazzotti", "price" : "9.90" },
{ "title" : "One night only", "artist" : "Bee Gees", "price" : "10.90" },
{ "title" : "Sylvias Mother", "artist" : "Dr.Hook", "price" : "8.10" }]}
从XML文件中显示
实例
<script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_cd_from_txt", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
w3.getHttpObject("w3data.php%3Fmodel%3Dmodel_cd_from_txt", myFunction);
function myFunction(myObject) {
w3.displayObject("id01", myObject);}
</script>
尝试一下 »
这是应用程序中使用的模型:
model_cd_from_xml
{"data" : {
"type" : "xmlfile",
"filename" : "cd_catalog.xml",
"record" : "CD",
"items" : [
{"name" : "artist", "nodename" : "ARTIST"},
{"name" : "title", "nodename" : "TITLE"},
{"name" : "country", "nodename" : "COUNTRY"}]}}
"type" : "xmlfile",
"filename" : "cd_catalog.xml",
"record" : "CD",
"items" : [
{"name" : "artist", "nodename" : "ARTIST"},
{"name" : "title", "nodename" : "TITLE"},
{"name" : "country", "nodename" : "COUNTRY"}]}}
这是XML文件:
cd_catalog.xml
<?xml version="1.0" encoding="ISO-8859-1"?>
<CATALOG>
<CD>
<TITLE>Empire Burlesque</TITLE>
<ARTIST>Bob Dylan</ARTIST>
<COUNTRY>USA</COUNTRY>
<COMPANY>Columbia</COMPANY>
<PRICE>10.90</PRICE>
<PUBLISHED>1985</PUBLISHED>
</CD>
<CD>
<TITLE>Hide your heart</TITLE>
<ARTIST>Bonnie Tyler</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>CBS Records</COMPANY>
<PRICE>9.90</PRICE>
<PUBLISHED>1988</PUBLISHED>
</CD>
<CD>
<TITLE>Greatest Hits</TITLE>
<ARTIST>Dolly Parton</ARTIST>
<COUNTRY>USA</COUNTRY>
<COMPANY>RCA</COMPANY>
<PRICE>9.90</PRICE>
<PUBLISHED>1982</PUBLISHED>
</CD>
<CD>
<TITLE>Still got the blues</TITLE>
<ARTIST>Gary Moore</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>Virgin records</COMPANY>
<PRICE>10.20</PRICE>
<PUBLISHED>1990</PUBLISHED>
</CD>
<CD>
<TITLE>Eros</TITLE>
<ARTIST>Eros Ramazzotti</ARTIST>
<COUNTRY>EU</COUNTRY>
<COMPANY>BMG</COMPANY>
<PRICE>9.90</PRICE>
<PUBLISHED>1997</PUBLISHED>
</CD>
<CD>
<TITLE>One night only</TITLE>
<ARTIST>Bee Gees</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>Polydor</COMPANY>
<PRICE>10.90</PRICE>
<PUBLISHED>1998</PUBLISHED>
</CD>
<CD>
<TITLE>Sylvias Mother</TITLE>
<ARTIST>Dr.Hook</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>CBS</COMPANY>
<PRICE>8.10</PRICE>
<PUBLISHED>1973</PUBLISHED>
</CD>
</CATALOG>
<CATALOG>
<CD>
<TITLE>Empire Burlesque</TITLE>
<ARTIST>Bob Dylan</ARTIST>
<COUNTRY>USA</COUNTRY>
<COMPANY>Columbia</COMPANY>
<PRICE>10.90</PRICE>
<PUBLISHED>1985</PUBLISHED>
</CD>
<CD>
<TITLE>Hide your heart</TITLE>
<ARTIST>Bonnie Tyler</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>CBS Records</COMPANY>
<PRICE>9.90</PRICE>
<PUBLISHED>1988</PUBLISHED>
</CD>
<CD>
<TITLE>Greatest Hits</TITLE>
<ARTIST>Dolly Parton</ARTIST>
<COUNTRY>USA</COUNTRY>
<COMPANY>RCA</COMPANY>
<PRICE>9.90</PRICE>
<PUBLISHED>1982</PUBLISHED>
</CD>
<CD>
<TITLE>Still got the blues</TITLE>
<ARTIST>Gary Moore</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>Virgin records</COMPANY>
<PRICE>10.20</PRICE>
<PUBLISHED>1990</PUBLISHED>
</CD>
<CD>
<TITLE>Eros</TITLE>
<ARTIST>Eros Ramazzotti</ARTIST>
<COUNTRY>EU</COUNTRY>
<COMPANY>BMG</COMPANY>
<PRICE>9.90</PRICE>
<PUBLISHED>1997</PUBLISHED>
</CD>
<CD>
<TITLE>One night only</TITLE>
<ARTIST>Bee Gees</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>Polydor</COMPANY>
<PRICE>10.90</PRICE>
<PUBLISHED>1998</PUBLISHED>
</CD>
<CD>
<TITLE>Sylvias Mother</TITLE>
<ARTIST>Dr.Hook</ARTIST>
<COUNTRY>UK</COUNTRY>
<COMPANY>CBS</COMPANY>
<PRICE>8.10</PRICE>
<PUBLISHED>1973</PUBLISHED>
</CD>
</CATALOG>
下载
下载该文件：https://7npmedia.w3cschool.cn/w3data.php.txt
将该文件复制到您的网站，并将其重命名为 w3data.php。
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