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How to configure MySQL or Oracle database for Node.js program under Linux_node.js
How to configure MySQL or Oracle database for Node.js program under Linux_node.js
mysql usage
Install mysql module:
Execute the command on the cmd command line in the installation root directory
npm install mysql
After successful installation,
When the mysql database table already exists.
Create a new mysql.js in the nodejs root directory:
var sys = require('util');
var mysql=require('mysql');
console.log('正在连接MySQL...');
var http = require("http");
var server=http.createServer(function(request, response) {
response.writeHead(200, {"Content-Type": "text/html;charset:utf-8"});
response.write("<!doctype html><html><meta charset='utf-8'/>");
var client = mysql.createConnection({'host':'localhost','port':3306,'user':'testmysql','password':'123456'});
clientConnectionReady = function(client)
{
client.query('use test', function(error, results) {
if(error) {
console.log('ClientConnectionReady Error: ' + error.message);
client.end();
return;
}else{
response.write("nodejs 服务器已经开始工作...<br/>");
response.write("已经连接上MySQL....<br/>");
}
clientReady(client);
});
};
clientReady = function(client) {
var values = ['不错啊'];
client.query('insert into nodemysql set names = :1', values,
function(error, results) {
if(error) {
console.log("ClientReady Error: " + error.message);
client.end();
return;
}
console.log('Inserted: ' + results.affectedRows + ' row.');
console.log('Id inserted: ' + results.insertId);
}
);
getData(client);
}
getData = function(client) {
client.query(
'select * from nodemysql',
function selectCb(error, results, fields) {
if (error) {
console.log('GetData Error: ' + error.message);
client.end();
return;
}
var data = '';
for(var i=0; i<results.length; i++){
var firstResult = results[i];
data += 'id: ' + firstResult['id']+' name: ' + firstResult['names']+"<br/>";
}
response.write(data);
response.write("关闭MySQL连接...");
response.write("</html>");
response.end();
}
);
client.end();
};
clientConnectionReady(client);
});
server.listen(8033,"127.0.0.1");
var sys = require("util");
sys.puts("Server running at http://localhost:8033/");
Run node mysql.js .
Visit http://localhost:8033 with your browser to see the effect.
Configure oracle support
Download the oracle database client connection package from the oracle website
instantclient-basic-linux, instantclient-sdk-linux
Unzip the oracle client connection module
$ unzip instantclient-basic-linux-11.2.0.3.0.zip $ unzip instantclient-sdk-linux-11.2.0.3.0.zip $ sudo mv instantclient_11_2/ /opt/instantclient $ cd /opt/instantclient $ sudo ln -s libocci.so.11.1 libocci.so $ sudo ln -s libclntsh.so.11.1 libclntsh.so
Configure environment variables
$ export OCI_INCLUDE_DIR=/opt/instantclient/sdk/include/ $ export OCI_LIB_DIR=/opt/instantclient
Enter the nodejs directory and install oracle module support
$ cd /usr/local/lib $ npm install oracle export LD_LIBRARY_PATH=/opt/instantclient
Write the oracle.js file to test whether the connection and execution of sql are normal
var oracle = require("oracle");
oracle.connect({ "hostname": "localhost", "user": "demo", "password": "demo", "database": "orcl", "port": 1521}, function(err, connection) {
if(err) {
console.log(err);
}
// selecting rows 注意 connection.execute 方法必须要三个参数 不然会出错
connection.execute("SELECT * FROM TEST WHERE ID = :1", ['1'], function(err1, results) {
// results will be an array of objects
console.log("query start");
if(err1) {
console.log(err1);
}
// console.log(results.length);
for(var i = 0; i < results.length; i++) {
console.log(results[i].ID);
}
connection.close();
});
});
node oracle.js
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