什么是AppML？
AppML是将服务器上的数据为HTML应用程序的工具。
w3data.php是AppML的子集。
w3data.php的目的是提供一种w3data.js与从Web服务器的数据。
应用程序模型
AppML使用应用程序模型 （用JavaScript对象符号）来描述服务器应用程序。
这个简单的模型描述了从数据库中检索数据的完整的应用程序：
model_customers.js
{
"database" : {
"connection" : "localmysql",
"sql" : "SELECT * FROM Customers"}
}
该模型存储在服务器上，并且不能由网络用户进行编辑。
你必须是一个服务器管理员或赋予的权利在服务器上编辑文件的用户。
使用应用程序的模型很容易，只需添加的型号名称，当你调用w3Http（）来w3data.php：
例
<script>
w3Http("w3data.php?model=model_customers", function () {
if (this.readyState == 4 && this.status == 200) {
var myObject = JSON.parse(this.responseText);
w3DisplayData("id01", myObject);
}
});
</script> 试一试» 显示从文本文件
例
<script>
w3Http("w3data.php?model=model_cd_from_txt", function () {
if (this.readyState == 4 && this.status == 200) {
var myObject = JSON.parse(this.responseText);
w3DisplayData("id01", myObject);
}
});
</script> 试一试» 这是在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}
]
}
}
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
显示从JSON文件
例
<script>
w3Http("w3data.php?model=model_cd_from_json", function () {
if (this.readyState == 4 && this.status == 200) {
var myObject = JSON.parse(this.responseText);
w3DisplayData("id01", myObject);
}
});
</script> 试一试» 这是在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" :
"title"},
{"name" : "price", "nodename" :
"title"}
]
}
}
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" }
]
} 显示从XML文件
例
<script>
w3Http("w3data.php?model=model_cd_from_xml", function () {
if (this.readyState == 4 && this.status == 200) {
var myObject = JSON.parse(this.responseText);
w3DisplayData("id01", myObject);
}
});
</script> 试一试» 这是在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"}
]
}
} t这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>