Node.js连接Mysql并进行数据库操作

1. [代码]安装 node-mysql     

1	$ npm install mysql

2. [代码]创建测试表     

1	//数据库名 NodeSample

2

3	CREATE TABLE `NodeSample`.`MyTable` (

4	`id` INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY ,

5	`firstname` VARCHAR( 20 ) NOT NULL ,

6	`lastname` VARCHAR( 20 ) NOT NULL ,

7	`message` TEXT NOT NULL

8	) ENGINE = MYISAM ;

3. [代码]连接数据库     

01	var sys = require('sys');

02

03	var Client = require('mysql').Client;

04	var client = new Client();

05

06	client.user = 'someuser';

07	client.password = 'password';

08

09	client.connect(function(error, results) {

10	if(error) {

11	console.log('Connection Error: ' + error.message);

12

return;

13

}

14	console.log('Connected to MySQL');

15

});

4. [代码]打开数据库     

01	ClientConnectionReady = function(client)

02

{

03	client.query('USE NodeSample', function(error, results) {

04	if(error) {

05	console.log('ClientConnectionReady Error: ' + error.message);

06	client.end();

07

return;

08

}

09

});

10

};

5. [代码]完成数据库操作程序     

01	var sys = require('sys');

02

03	var Client = require('mysql').Client;

04	var client = new Client();

05

06	client.user = 'someuser';

07	client.password = 'password';

08

09	console.log('Connecting to MySQL...');

10

11	client.connect(function(error, results) {

12	if(error) {

13	console.log('Connection Error: ' + error.message);

14

return;

15

}

16	console.log('Connected to MySQL');

17	ClientConnectionReady(client);

18

});

19

20	ClientConnectionReady = function(client)

21

{

22	client.query('USE NodeSample', function(error, results) {

23	if(error) {

24	console.log('ClientConnectionReady Error: ' + error.message);

25	client.end();

26

return;

27

}

28	ClientReady(client);

29

});

30

};

31

32	ClientReady = function(client)

33

{

34	var values = ['Chad', 'Lung', 'Hello World'];

35	client.query('INSERT INTO MyTable SET firstname = ?, lastname = ? , message = ?', values,

36	function(error, results) {

37	if(error) {

38	console.log("ClientReady Error: " + error.message);

39	client.end();

40

return;

41

}

42	console.log('Inserted: ' + results.affectedRows + ' row.');

43	console.log('Id inserted: ' + results.insertId);

44

}

45

);

46	GetData(client);

47

}

48

49	GetData = function(client)

50

{

51	client.query(

52	'SELECT * FROM MyTable',

53	function selectCb(error, results, fields) {

54	if (error) {

55	console.log('GetData Error: ' + error.message);

56	client.end();

57

return;

58

}

59	// Uncomment these if you want lots of feedback

60	//console.log('Results:');

61	//console.log(results);

62	//console.log('Field metadata:');

63	//console.log(fields);

64	//console.log(sys.inspect(results));

65

66	if(results.length > 0)

67

{

68	var firstResult = results[0];

69	console.log('First Name: ' + firstResult['firstname']);

70	console.log('Last Name: ' + firstResult['lastname']);

71	console.log('Message: ' + firstResult['message']);

72

}

73

});

74

75	client.end();

76	console.log('Connection closed');

77

};

6. [图片] 程序执行结果