使用c3p0

導入c3p0jar包

com.mchange

c3p0

0.9.5.2

在tomcat的context.xml文件加入數據源配置

auth="Container"

description="DB Connection"

driverClass="com.mysql.jdbc.Driver"

maxPoolSize="100" minPoolSize="2"

acquireIncrement="2"

name="jdbc/myDB"

user="root"

password="123456"

factory="org.apache.naming.factory.BeanFactory"

type="com.mchange.v2.c3p0.ComboPooledDataSource"

jdbcUrl="jdbc:mysql://localhost:3306/attendance_system?characterEncoding=utf8&serverTimezone=GMT%2B8" />

獲取連接

protected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

try {

//創建上下文

Context context=new InitialContext();

//獲取數據源

ComboPooledDataSource comboPooledDataSource= (ComboPooledDataSource) context.lookup

("java:comp/env/jdbc/myDB");

//獲取數據庫連接

Connection connection=comboPooledDataSource.getConnection();

if(!connection.isClosed()){

System.out.println("已經連接成功");

}

} catch (NamingException e) {

e.printStackTrace();

} catch (SQLException e) {

e.printStackTrace();

}

}

使用druid

導入jar包

com.alibaba

druid

1.1.16

在tomcat的context.xml文件加入數據源配置

name="jdbc/MysqlDataSource"

factory="com.alibaba.druid.pool.DruidDataSourceFactory"

auth="Container"

type="javax.sql.DataSource"

driverClassName="com.mysql.cj.jdbc.Driver"

url="jdbc:mysql://localhost:3306/yl?characterEncoding=utf8&serverTimezone=GMT%2B8"

username="root"

password="123456"

maxActive="50"

maxWait="10000"

removeabandoned="true"

removeabandonedtimeout="60"

logabandoned="false"

filters="stat"/>

獲取連接

protected void doGet(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

try {

//獲取上下文對象

Context context=new InitialContext();

//獲取數據源

DataSource ds= (DataSource) context.lookup("java:comp/env/jdbc/MysqlDataSource");

//獲取Connection對象

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容，希望對大家的學習有所幫助，也希望大家多多支持免費資源網。

總結

以上是生活随笔為你收集整理的java c3p0获取主键_Tomcatc3p0配置jnid数据源2种实现方法解析的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。