如何使用Spring结合c3p0配置Bean实现数据库连接?

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本文共计534个文字,预计阅读时间需要3分钟。

如何使用Spring结合c3p0配置Bean实现数据库连接?

Spring配置Bean连接数据库有两种方法:(1)直接在.xml文件内部配置;(2)使用注解配置。以下是一个简化的.xml文件配置示例:

xml

Spring配置bean连接数据库两种方法:

(1)直接在.xml文件内部配置:

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework.org/schema/beans" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xmlns:context="www.springframework.org/schema/context" xsi:schemaLocation="www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans.xsd www.springframework.org/schema/context www.springframework.org/schema/context/spring-context-4.3.xsd"> <!-- 配置链接数据库 --> <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)将参数放在外部文件中,然后再读入配置文件:

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework.org/schema/beans" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xmlns:context="www.springframework.org/schema/context" xsi:schemaLocation="www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans.xsd www.springframework.org/schema/context www.springframework.org/schema/context/spring-context-4.3.xsd"> <!-- 导入属性文件 --> <context:property-placeholder location="classpath:db.properties" /> <!-- 使用外部化属性文件的属性 --> <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:

如何使用Spring结合c3p0配置Bean实现数据库连接?

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

测试函数:

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()); } }

测试结果:

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持自由互联。

本文共计534个文字,预计阅读时间需要3分钟。

如何使用Spring结合c3p0配置Bean实现数据库连接?

Spring配置Bean连接数据库有两种方法:(1)直接在.xml文件内部配置;(2)使用注解配置。以下是一个简化的.xml文件配置示例:

xml

Spring配置bean连接数据库两种方法:

(1)直接在.xml文件内部配置:

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework.org/schema/beans" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xmlns:context="www.springframework.org/schema/context" xsi:schemaLocation="www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans.xsd www.springframework.org/schema/context www.springframework.org/schema/context/spring-context-4.3.xsd"> <!-- 配置链接数据库 --> <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)将参数放在外部文件中,然后再读入配置文件:

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="www.springframework.org/schema/beans" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xmlns:context="www.springframework.org/schema/context" xsi:schemaLocation="www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans.xsd www.springframework.org/schema/context www.springframework.org/schema/context/spring-context-4.3.xsd"> <!-- 导入属性文件 --> <context:property-placeholder location="classpath:db.properties" /> <!-- 使用外部化属性文件的属性 --> <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:

如何使用Spring结合c3p0配置Bean实现数据库连接?

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

测试函数:

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()); } }

测试结果:

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持自由互联。