本文实例讲述了javascript封装的sqlite操作类。分享给大家供大家参考。具体如下：

function sql(name,v,desc,size,tables){

this.db=null;

this.name=name;

this.v=v;

this.desc=desc;

this.size=size;

this.tables=tables;

this.ini();

}

sql.prototype.ini=function(){

var self=this;

self.db=openDatabase(self.name,self.v,self.desc,self.size);

self.db.transaction(function(tx){

self.tables.forEach(function(s){

tx.executeSql(s,[]);

});

});

};

sql.prototype.query=function(sql,opt,rs,err){

var opt=opt || [];

var rs =rs || function(){};

var err=err || function(tx,e){G.alert(e.message);};

this.db.transaction(function(tx){

if(typeof(sql)=='object'){

sql.forEach(function(s){

tx.executeSql(s,opt,rs,err);

});

}else{

tx.executeSql(sql,opt,rs,err);

}

});

};

demo：

var tbs=[

'CREATE TABLE IF NOT EXISTS cfrids(id varchar(32) PRIMARY KEY,jfs INT,jfx varchar(64),jxx TEXT,ct INT,uinfo TEXT,jia INT,zt INT,bz varchar(16),yue INT)',

'CREATE INDEX IF NOT EXISTS ct_a ON cfrids(ct)',

'CREATE TABLE IF NOT EXISTS cliao(id varchar(32) PRIMARY KEY,uid varchar(32),nr TEXT,ct INT,ty varchar(8),ismy INT)',

'CREATE INDEX IF NOT EXISTS uid_a ON cliao(uid)',

'CREATE TABLE IF NOT EXISTS czliao(id varchar(32) PRIMARY KEY,nr TEXT,ty varchar(8),ct INT,num INT)'];

var db=new sql('imdata'+z,'1.0','user data',1048576,tbs);

db.query('insert into cliao (id,uid,nr,ct,ty,ismy) values (?,?,?,?,?,?)',['afasdf','asdfa','saadf','eeee','rrrr',1]);

db.query('select * from cliao where uid=? order by ct desc limit ?,10',['22',50],function(tx,rs){

var l=rs.rows.length;

});

希望本文所述对大家的javascript程序设计有所帮助。