先安装mysql模块。
node.js默认安装时,模块文件放在 /usr/local/lib/node_modules 这个目录下,为了便宜管理,模块还是统一安装到这里好。
$ cd /usr/local/lib
$ npm install mysql
程序文件mysql.js
var Client = require(‘/usr/local/lib/node_modules/mysql‘).Client;
var client = new Client();
client.user = ‘root‘;
client.password = ‘‘;
console.log(‘Connecting to MySQL...‘);
client.query(‘USE tiny_shop‘); //如果MySQL中没有库表,赶紧建。
http = require("http");
var server = http.createServer(function(request, response) {
response.writeHeader(200, {"Content-Type": "text/html"});
client.query(‘SELECT * FROM tags‘, function selectCb(err, results, fields) {
if (err) {
throw err;
}
var data = ‘‘;
for (var i=0; i<results.length; i++) {
var firstResult = results[i];
data += ‘id: ‘ + firstResult[‘id‘]+‘tag: ‘ + firstResult[‘tag‘];
}
response.write(data);
response.end();
});
});
server.listen(8080);
var sys = require("util");
sys.puts("Server running at http://localhost:8080/");
运行
$ node mysql.js
在浏览器里,输入 http://localhost:8080 ,就能显示数据库里的数据了。
时间: 2024-10-08 22:25:23