SpringJDBC和事务控制

SpringJDBC和事务控制

主要内容#

1、基本配置#

Copy
 <!--依赖导入-->
<dependencies>
        <!-- 添加相关的依赖坐标 -->
        <!-- spring 框架坐标依赖添加 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.4.RELEASE</version>
        </dependency>
        <!-- spring 测试环境 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.4.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <!-- aop -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <!-- spring jdbc -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.4.RELEASE</version>
        </dependency>
        <!-- spring事物 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.4.RELEASE</version>
        </dependency>
        <!-- mysql 驱动包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.19</version>
        </dependency>
        <!-- c3p0 连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.5</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.4.RELEASE</version>
            <scope>compile</scope>
        </dependency>
    </dependencies>

spring.xml配置

Copy
<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
        https://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd">
    <!-- Spring扫描注解的配置 -->
    <context:component-scan base-package="com.geo" />
    <!-- 加载properties 配置文件 -->
    <context:property-placeholder location="jdbc.properties" />
    <!-- 配置 c3p0 数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- property标签的value属性对应的是jdbc.properties中的值 -->
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!-- 配置JdbcTemplate实例，并注入一个dataSource数据源-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

jdbc.properties

Copy
# 驱动名
jdbc.driver=com.mysql.cj.jdbc.Driver
# 数据库连接
jdbc.url=jdbc:mysql://localhost:3306/jdbcprac?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT%2B8&useSSL=false
# 数据库用户名称
jdbc.user= root
# 数据库用户密码
jdbc.password=1234

2、测试类#

Copy
/**
 * Created with IntelliJ IDEA.
 *
 * @Author: Suhai
 * @Date: 2022/04/02/18:15
 * @Description:
 */
public class JdbcTest01 {
    @Test
    public void testQueryCount() {
// 获取spring上下文环境
        ApplicationContext ctx = new
                ClassPathXmlApplicationContext("springjdbc.xml");
// 得到模板类 JdbcTemplate对象
        JdbcTemplate jdbcTemplate = (JdbcTemplate) ctx.getBean("jdbcTemplate");
// 定义sql语句
        String sql = "select count(1) from student";
// 执行查询操作（无参数）
        Integer total= jdbcTemplate.queryForObject(sql, Integer.class);
        System.out.println("总记录数:" + total);
    }

    @Test
    public void testQueryCountByUserId() {
        // 获取spring上下文环境
        ApplicationContext ctx = new
                ClassPathXmlApplicationContext("springjdbc.xml");
        // 得到模板类 JdbcTemplate对象
        JdbcTemplate jdbcTemplate = (JdbcTemplate) ctx.getBean("jdbcTemplate");
        // 定义sql语句
        String sql = " select count(1) from student where id = ?";
        // 执行查询操作（有参数）
        Integer total = jdbcTemplate.queryForObject(sql, Integer.class, 1);
        System.out.println("总记录数:" + total);
    }
}