这篇文章主要介绍了javascript封装的sqlite操作类,可实现SQLite数据库的初始化及执行SQL语句的功能,具有一定参考借鉴价值,需要的朋友可以参考下
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。
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