用spring 创建ComboPooledDataSource和JdbcTemplate对象

用spring 创建ComboPooledDataSource和JdbcTemplate对象
3.1添加ioc相关jar包

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

<dependency>   <groupId>org.springframework</groupId>   <artifactId>spring-core</artifactId>   <version>4.3.18.RELEASE</version> </dependency> <dependency>   <groupId>org.springframework</groupId>   <artifactId>spring-beans</artifactId>   <version>4.3.18.RELEASE</version> </dependency> <dependency>   <groupId>org.springframework</groupId>   <artifactId>spring-context</artifactId>   <version>4.3.18.RELEASE</version> </dependency> <dependency>   <groupId>org.springframework</groupId>   <artifactId>spring-context-support</artifactId>   <version>4.3.18.RELEASE</version> </dependency> <dependency>   <groupId>org.springframework</groupId>   <artifactId>spring-expression</artifactId>   <version>4.3.18.RELEASE</version> </dependency>

　　

3.2创建db.properties文件

?

1 2 3 4

driverClass=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/ssm user=root password=123

　　

3.3在applicationContext.xml文件中创建对象

 

?

1 2 3 4 5 6 7 8 9 10 11 12 13

<context:property-placeholder location="db.properties"></context:property-placeholder>   <!-- 创建一个连接池对象 --> <bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">    <property name="driverClass" value="${driverClass}" />     <property name="jdbcUrl" value="${url}"/>     <property name="user" value="${user}" />     <property name="password" value="${password}" /> </bean> <!-- 创建一个jdbcTemplate对象 并且通过构造函数 将连接池对象 注入到jdbcTemplate --> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >     <constructor-arg name="dataSource" ref="comboPooledDataSource" /> </bean>

　　

3.4 修改dao 层

?

1 2 3 4 5 6 7 8 9 10 11 12 13

<context:property-placeholder location="db.properties"></context:property-placeholder>   <!-- 创建一个连接池对象 --> <bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">    <property name="driverClass" value="${driverClass}" />     <property name="jdbcUrl" value="${url}"/>     <property name="user" value="${user}" />     <property name="password" value="${password}" /> </bean> <!-- 创建一个jdbcTemplate对象 并且通过构造函数 将连接池对象 注入到jdbcTemplate --> <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >     <constructor-arg name="dataSource" ref="comboPooledDataSource" /> </bean>

　　

3.5测试

?

1 2 3 4 5 6 7 8 9 10 11

@Test public void test() {     ClassPathXmlApplicationContext applicationContext=new ClassPathXmlApplicationContext("applicationContext.xml");       IUsersDao usersDao=  applicationContext.getBean("usersDao",IUsersDao.class);       Users user=new Users("xiaowanglaoshi","123");       usersDao.add(user); }