1、依賴api的使用

導(dǎo)入jar包

<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-dbcp2 --> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-dbcp2</artifactId> <version>2.7.0</version> </dependency>

導(dǎo)入dbcp.properties配置文件

獲取連接

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { Properties properties=new Properties(); //獲取dbcp配置文件對(duì)應(yīng)輸入流 InputStream inputStream=DbcpServlet.class.getClassLoader().getResourceAsStream('dbcp.properties'); //加載dbcp配置文件 properties.load(inputStream);​ BasicDataSource basicDataSource=null; try { //數(shù)據(jù)源對(duì)象 basicDataSource=BasicDataSourceFactory.createDataSource(properties); //獲取數(shù)據(jù)庫連接 Connection connection=basicDataSource.getConnection(); System.out.println(connection); } catch (Exception e) { e.printStackTrace(); }​ }

2、依賴tomcat容器的使用

利用jndi機(jī)制實(shí)現(xiàn)，jndi（命名及目錄查找接口），將數(shù)據(jù)源連接池的配置信息在容器（Tomcat）實(shí)現(xiàn)配置

具體如何實(shí)現(xiàn)配置

在tomcat的context.xml文件加入數(shù)據(jù)源配置

<Resource <!--數(shù)據(jù)源名字--> name='jdbc/news' <!--驗(yàn)證數(shù)據(jù)源的容器類型--> auth='Container' type='javax.sql.DataSource' <!--最大連接數(shù)據(jù)庫連接對(duì)象的數(shù)量100--> maxActive='100' <!--最大空閑數(shù)是30--> maxIdle='30' <!--最大等待時(shí)間--> maxWait='10000' <!--數(shù)據(jù)庫用戶名--> username='root' <!--數(shù)據(jù)庫密碼--> password='123456' <!--數(shù)據(jù)庫驅(qū)動(dòng)--> driverClassName='com.mysql.cj.jdbc.Driver' <!--數(shù)據(jù)庫url--> url='jdbc:mysql://localhost:3306/yl?characterEncoding=utf8&amp;serverTimezone=GMT%2B8'/>

獲取連接

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try { //獲取上下文對(duì)象 Context ctx = new InitialContext(); //通過jndi命名服務(wù)，找到數(shù)據(jù)源配置 DataSource ds = (DataSource) ctx.lookup('java:comp/env/jdbc/news'); //獲取數(shù)據(jù)庫連接 Connection connection = ds.getConnection(); if (!connection.isClosed()) {System.out.println('連接成功'); } } catch (NamingException e) { e.printStackTrace(); } catch (SQLException e) { e.printStackTrace(); } }

以上就是本文的全部內(nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持好吧啦網(wǎng)。