使用apache-cordova开发HTML5应用,操作数据库参考如下:
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<!DOCTYPE html>
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<html>
<head>
<meta name="viewport" content="width=device-width,height=device-height,user-scalable=no,maximum-scale=1.0,initial-scale=1.0" />
<meta http-equiv="Content-type" content="text/html; charset=utf-8"> <!-- ISO-8859-1 -->
<title>Cordova Mobile Spec</title>
<link rel="stylesheet" href="../master.css" type="text/css" media="screen" title="no title" charset="utf-8">
<script type="text/javascript" charset="utf-8" src="../cordova.js"></script>
<script type="text/javascript" charset="utf-8">
var deviceReady = false;
//-------------------------------------
// HTML5 Database
//-------------------------------------
var db;
var callDatabase = function() {
db = openDatabase("mydb", "1.0", "Apache Cordova Demo", 20000);
if (db === null) {
databaseOutput("Database could not be opened.");
return;
}
databaseOutput("Database opened.");
db.transaction(function (tx) {
tx.executeSql('DROP TABLE IF EXISTS DEMO');
tx.executeSql('CREATE TABLE IF NOT EXISTS DEMO (id unique, data)', [],
function(tx,results) { console.log("Created table"); },
function(tx,err) { alert("Error creating table: "+err.message); });
tx.executeSql('INSERT INTO DEMO (id, data) VALUES (1, "First row")', [],
function(tx,results) { console.log("Insert row1 success"); },
function(tx,err) { alert("Error adding 1st row: "+err.message); });
tx.executeSql('INSERT INTO DEMO (id, data) VALUES (2, "Second row")', [],
function(tx,results) { console.log("Insert row2 success"); },
function(tx,err) { alert("Error adding 2nd row: "+err.message); });
databaseOutput("Data written to DEMO table.");
console.log("Data written to DEMO table.");
tx.executeSql('SELECT * FROM DEMO', [], function (tx, results) {
var len = results.rows.length;
var text = "DEMO table: " + len + " rows found.<br>";
text = text + "<table border='1'><tr><td>Row</td><td>Data</td></tr>";
for (var i=0; i<len; i++){
text = text + "<tr><td>" + i + "</td><td>" + results.rows.item(i).id + ", " + results.rows.item(i).data + "</td></tr>";
}
text = text + "</table>";
databaseOutput(text);
}, function(tx, err) {
alert("Error processing SELECT * SQL: "+err.message);
});
tx.executeSql('SELECT ID FROM DEMO', [], function (tx, results) {
var len = results.rows.length;
var text = "DEMO table: " + len + " rows found.<br>";
text = text + "<table border='1'><tr><td>Row</td&g