Linux下为Node.js程序配置MySQL或Oracle数据库的方法

mysql使用
安装mysql 模块:
在安装根目录 cmd命令行执行命令

npm install mysql

安装成功后、
mysql数据库表 已存在的情况下。
在nodejs根目录 新建mysql.js:

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/");

运行 node mysql.js  。
 浏览器 访问 http://localhost:8033 即可看到效果。

配置oracle支持
在oracle网站下载oracle数据库客户端连接包  
instantclient-basic-linux，instantclient-sdk-linux  
解压oracle客户端连接模块

$ 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

配置环境变量

$ export OCI_INCLUDE_DIR=/opt/instantclient/sdk/include/
$ export OCI_LIB_DIR=/opt/instantclient

进入nodejs目录  安装oracle模块支持

$ cd /usr/local/lib 

$ npm install oracle 

export LD_LIBRARY_PATH=/opt/instantclient

编写oracle.js文件 测试连接于执行sql是否正常

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();
 });
});

终端运行命令

 node oracle.js