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Spring通過c3p0配置bean連接數(shù)據(jù)庫

更新時間：2019年08月21日 11:14:23 作者：忘記時間的小白

這篇文章主要為大家詳細介紹了Spring通過c3p0配置bean連接數(shù)據(jù)庫，具有一定的參考價值，感興趣的小伙伴們可以參考一下

Spring配置bean連接數(shù)據(jù)庫兩種方法：

（1）直接在.xml文件內(nèi)部配置：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
 
 
 <!-- 配置鏈接數(shù)據(jù)庫 -->
 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
 <property name="user" value="root"></property>
 <property name="password" value="wangjian"></property>
 <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
 <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf-8&amp;useSSL=false"></property>
 </bean>
 
</beans>

（2）將參數(shù)放在外部文件中，然后再讀入配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">
 
 <!-- 導(dǎo)入屬性文件 -->
 
 <context:property-placeholder location="classpath:db.properties" />
 <!-- 使用外部化屬性文件的屬性 -->
 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
 <property name="user" value="${user}"></property>
 <property name="password" value="${password}"></property>
 <property name="driverClass" value="${driverclass}"></property>
 <property name="jdbcUrl" value="${jdbcurl}"></property>
 </bean>
 
 
</beans>

外部的配置文件：

user=root
password=wangjian
driverclass=com.mysql.jdbc.Driver
jdbcurl=jdbc:mysql://localhost:3306/test?useUnicode=true&amp;characterEncoding=utf-8&amp;useSSL=false

測試函數(shù)：

package com.primary.spring.beans.properties;
 
import java.sql.SQLException;
 
import javax.sql.DataSource;
 
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
 
public class Main {
 public static void main(String[] args) throws SQLException {
 
 ApplicationContext ctx = new ClassPathXmlApplicationContext("beans-properties.xml");
 
 DataSource dataSource = (DataSource) ctx.getBean("dataSource");
 System.out.println(dataSource.getConnection());
 
 }
}

測試結(jié)果：