一、通过Driver接口直接连接
站在用户的角度思考问题，与客户深入沟通，找到武安网站设计与武安网站推广的解决方案，凭借多年的经验，让设计与互联网技术结合，创造个性化、用户体验好的作品，建站类型包括：成都网站制作、做网站、企业官网、英文网站、手机端网站、网站推广、主机域名、网络空间、企业邮箱。业务覆盖武安地区。
/**
* 通过Driver获取Connection
* @return
*/
public Connection getConnectionByDriver() throws Exception{
String driverClass = "com.MySQL.jdbc.Driver";
String url = "jdbc:mysql:///hdz";
String user = "root";
String password = "123456";
Driver driver = new com.mysql.jdbc.Driver();
Properties info = new Properties();
info.setProperty("driverClass", driverClass);
info.setProperty("user", user);
info.setProperty("password", password);
Connection connection = driver.connect(url, info);
return connection;
}二、通过DriverManager直接连接
/**
* 通过DriverManager获取Connection
* @return
* @throws Exception
*/
public Connection getConnectionByDriverManager() throws Exception{
String url = "jdbc:mysql:///hdz";
String user = "root";
String password = "123456";
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection(url, user, password);
return connection;
}/**
* 通过把参数写在配置文件的方式获取Connection
* @return
* @throws Exception
*/
public Connection getConectionByProperties() throws Exception{
InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("jdbc.properties");
Properties info = new Properties();
info.load(inputStream);
String url = info.getProperty("url");
Class.forName("com.mysql.jdbc.Driver");
Connection connection = DriverManager.getConnection(url, info);
return connection;
}
url=jdbc:mysql:///hdz
user=root
password=123456三、通过DBCP数据源连接
@Test
public void testDbcp() throws Exception {
final BasicDataSource basicDataSource = new BasicDataSource();
basicDataSource.setDriverClassName("com.mysql.jdbc.Driver");
basicDataSource.setUrl("jdbc:mysql:///hdz");
basicDataSource.setUsername("root");
basicDataSource.setPassword("123456");
basicDataSource.setInitialSize(2);
basicDataSource.setMaxActive(2);
basicDataSource.setMinIdle(2);
basicDataSource.setMaxWait(2000);
Connection connection1 = basicDataSource.getConnection();
System.out.println(connection1);
Connection connection2 = basicDataSource.getConnection();
System.out.println(connection2);
new Thread(){
@Override
public void run() {
Connection connection3;
try {
connection3 = basicDataSource.getConnection();
System.out.println(connection3);
} catch (SQLException e) {
e.printStackTrace();
}
}
}.start();
Thread.sleep(3000);
connection2.close();
}或者通过配置文件，BasicDatasourceFactory工厂方式
private DbcpDataSource() {
Properties info = new Properties();
InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("dbcp.properties");
try {
info.load(inputStream);
dataSource = BasicDataSourceFactory.createDataSource(info);
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
dbcp.properties
driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql:///hdz
username=root
password=123456
initialSize=5
maxActive=10
minIdle=5
maxWait=5000四、通过C3P0数据源连接
public class C3p0DataSourceUtils {
private DataSource dataSource = null;
private static C3p0DataSourceUtils instance = new C3p0DataSourceUtils();
private C3p0DataSourceUtils(){
dataSource = new ComboPooledDataSource("intergalactoApp");
}
public static C3p0DataSourceUtils newInstance(){
return instance;
}
public Connection getConnection() {
try {
return dataSource.getConnection();
} catch (SQLException e) {
e.printStackTrace();
}
return null;
}
}