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用spring 创建ComboPooledDataSource和JdbcTemplate对象

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source link: https://blog.51cto.com/u_15707781/5724417
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用spring 创建ComboPooledDataSource和JdbcTemplate对象

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呆萌老师博客号 2022-09-29 23:00:35 博主文章分类：JAVA基础学习 ©著作权

文章标签 spring xml 文章分类 Java 编程语言 yyds干货盘点 阅读数194

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

<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
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
<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
@Component
public class UsersDao implements IUsersDao {

//注入jdbcTemplate对象
    @Autowired
    private JdbcTemplate jdbcTemplate;

public JdbcTemplate getJdbcTemplate() {
        return jdbcTemplate;
    }

public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
        this.jdbcTemplate = jdbcTemplate;
    }

//update方法 (增 删 改)
    @Override
    public void add(Users user) {

String sql = "insert into users values(null,?,?)";

jdbcTemplate.update(sql, user.getUname(), user.getPassword());

}
3.5测试
@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);
}

            

        
        
        
    

    

        
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