最近一直在用javascript在做项目
可是做着做着
感觉很多功能代码都是重复的。
比如对javascript数组的排序
还有对数组数据的删选以及分组
所以,后来兴致以上来。
一发不可收拾。
写了一个能在javascript中应用的 SQL 库
关于JSQL的开源问题
其实目前我已经在考虑这个问题
如果开源了,能有更多的好朋友一起来维护
JSQL 目前的大概结构是这样的
YESBRAIN - 命名空间
|
JSQL - 就是本类库啦!
|
Memory - JSQL 在 Objects array 中的应用封装
|
Server - JSQL 在 远端 SQL server 中的应用封装
|
Client - JSQL 在 浏览器 sqlite 中的应用封装
|
DOM - JSQL 在 对 W3C DOM 的的应用封装
有兴趣的朋友可以
QQ: 85302520 联系我
或者 Email : gongji at qq dot com
已经开放了
SVN checkout 地址:http://code.google.com/p/jsql-javascript/source/checkout
里面有几个例子和全部JSQL得源代码
后来又想,怎么不能用javascript直接连接数据库呢?
又做了一个javascript直连Sql数据的类库
后来,又想到其实还可以用SQL语句来操作HTML DOM模型
再再再后来,又看到了HTML5中对web DB的实现
所以对webDB,就是chrome和safari中的sqlite的封装
于是乎就有了:
1.从服务器上获取数据、执行SQL操作:
_SQLPROXYURL_ = 'SQLProxy.php';
_SQLSERVERHOST_ = 'localhost';
_SQLUSERNAME_ = 'root';
_SQLPASSWORD_ = '';
_SQLDATABASE_ = 'HotelManageMent';
var result = "select * from Room".OnServer().executeSQL();
for(var i=0; i<result.length; i++) {
//do something here.... using result[i];
}
2.操作Javascript Object Array 、执行SQL操作:
var Room = [
{
ID: 'bot',
name: 'test',
sex: true
}, {
ID: 2,
name: 'test8',
sex: true
}, {
ID: 3,
name: 'test5',
sex: false
}, {
ID: 4,
name: 'test2',
sex: true
}];
SQL = "select Max(id) as bid,Sum(id) as total from records where name like \"test%\" group by sex order by id desc,name asc";
var result = SQL.executeSQL();
for(var i=0; i<result.length; i++) {
//do something here.... using result[i];
};
"create table mytable".executeSQL();
for(var j=0; j<100; j++) {
"insert into mytable (id,name,sex) values(2,'zhangsan',true) ".executeSQL();
};
操作Object Array
其实还可以这样操作:
var Room = [
{
ID: 'bot',
name: 'test',
sex: true
}, {
ID: 2,
name: 'test8',
sex: true
}, {
ID: 3,
name: 'test5',
sex: false
}, {
ID: 4,
name: 'test2',
sex: true
}];
"update Room set name = 'man' where sex=true".executeSQL();
支持的SQL语句有 SELECT \ INSERT \ UPDATE \ DELETE \ CREATE TABLE \ DROP TABLE
3.上回说道我发现DOM其实也可以用SQL操作
比方说,你可以直接插入100个图片element操作如下:
'create table logolist'.ForDOM().executeSQL();
for(var i=0;i<100;i++) {
"insert into logolist(nodename,title,src) values ('img','google','images/google.gif')".ForDOM().execute();
};
或者是DELETE这些符合条件的元素:
("delete from logolist where title='google'").ForDOM().execute();
亦或是充当selector:
var result = ("select * from logolist").ForDOM().execute();
for(var i=0;i<result.length;i++) {
result[i].src = 'baidu.gif';
};
接上文说道的JSQL
4.当然随着HTML5的普及,web DB 已经是大势所趋了
所以,JSQL封装到:
_CLIENTDATABASE_ = 'HotelManage';
_CLIENTDBVERSION_ = '0.1';
_CLIENTDBDESC_ = "First Client DataBase";
_CLIENTDBSIZE_ = 10240;
JSQL("create table sqllite(id int)").OnClient().execute();
for (var i = 0; i < 1000; i++) {
JSQL("insert into sqllite (id) values ("+i+")").OnClient().execute();
};
var result = ("select * from sqllite").OnClient().executeSQL();
//alert(result);
for(var i=0;i<result.length;i++) {
//do something using result[i]
};
当然web DB 的sqlite同样支持Insert / select / update / delete / create / drop table
甚至更加牛逼的sql语句。
最后附上我用JSQL库做的两个案例:
感谢 gongji 的投稿
此案例均在浏览器客户端用js实现,没有经过服务器上的php等任何服务端语言处理:
1.JSQL简单example,批量图片切换。其实这个example也很简单,
就是根据where后的条件批量修改element的属性,此处为Img元素
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript" src="../src/YESBRAIN.js"></script>
<script type="text/javascript" src="../src/JSQL.js"></script>
<script type="text/javascript" src="../src/JSQL-DOM.js"></script>
<title>Switch Logo Images</title>
</head>
<body>
<button onClick="switchlogos();"> 切换 LOGOS </button>
<script type="text/javascript">
title1 = "google";
title2 = "baidu";
logo1 = "images/google.gif";
logo2 = "images/baidu.gif";
function switchlogos() {
//alert('switch');
var tmplogo = logo1;
var tmptitle = title1;
logo1 = logo2;
title1 = title2;
logo2 = tmplogo;
title2 = tmptitle;
("update logolist set src='" + logo1 + "', title='" + title1 + "'").ForDOM().execute();
};
'create table logolist'.ForDOM().executeSQL();
for(var i=0;i<100;i++) {
"insert into logolist(nodename,title,src) values ('img','google','images/google.gif')".ForDOM().execute();
};
//("delete from logolist where (1=1)").ForDOM().execute();
</script>
</body>
</html>
[/code]
其中,还用到了JSQL的DOM元素插入操作:
[code="js"]
'create table logolist'.ForDOM().executeSQL();
for(var i=0;i<100;i++) {
"insert into logolist(nodename,title,src) values ('img','google','images/google.gif')".ForDOM().execute();
};
2.JSQL应用案例:基于客户端的成绩统计
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Marks Count</title>
<script type="text/javascript" src="../src/YESBRAIN.js"></script>
<script type="text/javascript" src="../src/JSQL.js"></script>
<script type="text/javascript" src="../src/JSQL-Memory.js"></script>
<script type="text/javascript" src="../src/JSQL-DOM.js"></script>
<style>
#marks input {
width: 100px;
}
</style>
</head>
<body>
<center>
<h1>Marks Count</h1>
<p>
<button onclick="insertline();"> Add one line </button>
<button onclick="savemarks();"> Save Changes </button>
<span>By<span>
<select id="byfield">
<option value="chinese" selected="selected">Chinese</option>
<option value="math">Math</option>
<option value="english">English</option>
</select>
<select id="ascdesc">
<option value="desc" selected="selected">Desc</option>
<option value="asc">Asc</option>
</select>
<button onclick="order();">Order</button>
</p>
<form name="marks" id="marks">
<span>Name:</span>
<input type="text" id="name[1]" value="zhangsan">
<span>Sex:</span>
<input type="text" id="sex[1]" value="female">
<span>Chinese:</span>
<input type="text" id="chinese[1]" value="96">
<span>Math:</span>
<input type="text" id="math[1]" value="94">
<span>English:</span>
<input type="text" id="english[1]" value="98">
<br>
</form>
</center>
<script type="text/javascript">
var marks = [
{
name: 'Lisi',
sex: 'Female',
chinese: '88',
math: '90',
english: '92'
},
{
name: 'Wangwu',
sex: 'Female',
chinese: '92',
math: '80',
english: '82'
},
{
name: 'Lilei',
sex: 'Female',
chinese: '93',
math: '88',
english: '87'
},
{
name: 'HanMeimei',
sex: 'Male',
chinese: '97',
math: '92',
english: '100'
},
{
name: 'Wangjuan',
sex: 'Male',
chinese: '92',
math: '93',
english: '90'
}
];
function addto(index,name,sex,chinese,math,english) {
"insert into marks (nodename,innerHTML) values ('span','Name:')".ForDOM().execute();
("insert into marks (nodename,type,id,value) values ('input','text','name[" + (index) + "]','" + name + "')").ForDOM().execute();
"insert into marks (nodename,innerHTML) values ('span','Sex:')".ForDOM().execute();
("insert into marks (nodename,type,id,value) values ('input','text','sex[" + (index) + "]','" + sex + "')").ForDOM().execute();
"insert into marks (nodename,innerHTML) values ('span','Chinese:')".ForDOM().execute();
("insert into marks (nodename,type,id,value) values ('input','text','chinese[" + (index) + "]','" + chinese + "')").ForDOM().execute();
"insert into marks (nodename,innerHTML) values ('span','Math:')".ForDOM().execute();
("insert into marks (nodename,type,id,value) values ('input','text','math[" + (index) + "]','" + math + "')").ForDOM().execute();
"insert into marks (nodename,innerHTML) values ('span','English:')".ForDOM().execute();
("insert into marks (nodename,type,id,value) values ('input','text','english[" + (index) + "]','" + english + "')").ForDOM().execute();
("insert into marks (nodename) values ('br')").ForDOM().execute();
};
for(var i=0; i<marks.length;i++) {
addto(i+2,marks[i].name,marks[i].sex,marks[i].chinese,marks[i].math,marks[i].english);
};
function insertline() {
var count = "select count(*) as Count from marks where id like 'name%'".ForDOM().query();
var index = count[0].Count + 1;
addto(index,"","","","","");
};
function dellastline() {
var count = "select count(*) as Count from marks where id like 'name%'".ForDOM().query();
var index = count[0].Count;
("delete from marks where id like '%["+ index +"]'").ForDOM().execute();
};
"create table savedmarks".execute();
function savemarks() {
var names = ("select value from marks where id like 'name%'").ForDOM().query();
var sexs = ("select value from marks where id like 'sex%'").ForDOM().query();
var chineses = ("select value from marks where id like 'chinese%'").ForDOM().query();
var maths = ("select value from marks where id like 'math%'").ForDOM().query();
var englishs = ("select value from marks where id like 'english%'").ForDOM().query();
"delete from savedmarks".execute();
for(var i=0;i<names.length;i++) {
("insert into savedmarks (name,sex,chinese,math,english) values ('"+ names[i].value +"','" + sexs[i].value + "'," + chineses[i].value + "," + maths[i].value + "," + englishs[i].value + ")").execute();
};
//alert(savedmarks);
};
function orderby(field,asc) {
savemarks();
var marks = ("select * from savedmarks order by " + field + " " + asc).query();
"delete from marks".ForDOM().execute();
for(var i=0; i<marks.length;i++) {
addto(i+2,marks[i].name,marks[i].sex,marks[i].chinese,marks[i].math,marks[i].english);
};
};
function order() {
var byfield = document.getElementById("byfield").value;
var ascdesc = document.getElementById("ascdesc").value;
orderby(byfield,ascdesc);
};
</script>
</body>
</html>
主要用到四个JS库,其中YESBRAIN.js是基库,JSQL.js是接口。JSQL-Memory.js和JSQL-DOM分别是JSQL对 javascript Objects Array 和 Html DOM 的 SQL 实现。
感谢 gongji 的投稿