参考:http://www.oschina.net/code/snippet_95289_25000 github地址: https://github.com/obullxl/osnode-site
1、配置config.json
{2、db.js
"dbhost": "localhost",
"port": 3306,
"user": "root",
"password": "root",
"db": "nodejs",
"maxConnLimit": 60
}
/**3、测试:
* 数据库模块
*/
var config = require("../config");
var options = {
'host': config.dbhost,
'port': config.port,
'user': config.user,
'password': config.password,
'database': config.db,
//'charset': config.charset,
'connectionLimit': config.maxConnLimit,
'supportBigNumbers': true,
'bigNumberStrings': true
};
var mysql = require('mysql');
var pool = mysql.createPool(options);
/**
* 释放数据库连接
*/
exports.release = function(connection) {
connection.end(function(error) {
console.log('Connection closed');
});
};
/**
* 执行查询
*/
exports.execQuery = function(options) {
pool.getConnection(function(error, connection) {
if(error) {
console.log('DB-获取数据库连接异常!');
throw error;
}
/*
* connection.query('USE ' + config.db, function(error, results) { if(error) { console.log('DB-选择数据库异常!'); connection.end(); throw error; } });
*/
// 查询参数
var sql = options['sql'];
var args = options['args'];
var handler = options['handler'];
// 执行查询
if(!args) {
var query = connection.query(sql, function(error, results) {
if(error) {
console.log('DB-执行查询语句异常!');
throw error;
}
// 处理结果
handler(results);
});
console.log(query.sql);
} else {
var query = connection.query(sql, args, function(error, results) {
if(error) {
console.log('DB-执行查询语句异常!');
throw error;
}
// 处理结果
handler(results);
});
console.log(query.sql);
}
// 返回连接池
connection.release(function(error) {
if(error) {
console.log('DB-关闭数据库连接异常!');
throw error;
}
});
});
};
var db = require("./db");
var options = {
'sql':'SELECT * FROM test',
'handler':function(results) {
var data = '';
for (var i=0; i<results.length; i++) {
var firstResult = results[i];
data += 'id: ' + firstResult['id']+'text: ' + firstResult['text'];
}
console.log(data);
}
}
db.execQuery(options);