開(kāi)發(fā)步驟

①導(dǎo)入數(shù)據(jù)源的坐標(biāo)和數(shù)據(jù)庫(kù)驅(qū)動(dòng)坐標(biāo)

②創(chuàng)建數(shù)據(jù)源對(duì)象

③設(shè)置數(shù)據(jù)源的基本連接數(shù)據(jù)

④使用數(shù)據(jù)源獲取連接資源和歸還連接資源

數(shù)據(jù)源的手動(dòng)創(chuàng)建

①導(dǎo)入c3p0和druid的坐標(biāo)

<!-- C3P0連接池 --> <dependency><groupId>c3p0</groupId><artifactId>c3p0</artifactId><version>0.9.1.2</version> </dependency> <!-- Druid連接池 --> <dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.1.10</version> </dependency>

①導(dǎo)入mysql數(shù)據(jù)庫(kù)驅(qū)動(dòng)坐標(biāo)

<!-- mysql驅(qū)動(dòng) --> <dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.39</version> </dependency>

②創(chuàng)建C3P0連接池

@Test public void testC3P0() throws Exception {//創(chuàng)建數(shù)據(jù)源ComboPooledDataSource dataSource = new ComboPooledDataSource();//設(shè)置數(shù)據(jù)庫(kù)連接參數(shù)dataSource.setDriverClass("com.mysql.jdbc.Driver"); dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/test");dataSource.setUser("root");dataSource.setPassword("root");//獲得連接對(duì)象Connection connection = dataSource.getConnection();System.out.println(connection); }

②創(chuàng)建Druid連接池

@Test public void testDruid() throws Exception {//創(chuàng)建數(shù)據(jù)源DruidDataSource dataSource = new DruidDataSource();//設(shè)置數(shù)據(jù)庫(kù)連接參數(shù)dataSource.setDriverClassName("com.mysql.jdbc.Driver"); dataSource.setUrl("jdbc:mysql://localhost:3306/test"); dataSource.setUsername("root");dataSource.setPassword("root");//獲得連接對(duì)象Connection connection = dataSource.getConnection(); System.out.println(connection); }

③提取jdbc.properties配置文件

jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/test jdbc.username=root jdbc.password=root

④讀取jdbc.properties配置文件創(chuàng)建連接池

@Test public void testC3P0ByProperties() throws Exception {//加載類(lèi)路徑下的jdbc.propertiesResourceBundle rb = ResourceBundle.getBundle("jdbc");ComboPooledDataSource dataSource = new ComboPooledDataSource(); dataSource.setDriverClass(rb.getString("jdbc.driver")); dataSource.setJdbcUrl(rb.getString("jdbc.url")); dataSource.setUser(rb.getString("jdbc.username")); dataSource.setPassword(rb.getString("jdbc.password"));Connection connection = dataSource.getConnection(); System.out.println(connection); }

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