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Spring中JdbcTemplate

程序员文章站 2024-03-21 21:52:40
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什么是JdbcTemplate

不引入其它框架,Spring框架对jdbc操作的封装,使用JdbcTemplate对数据库的操作

JdbcTemplate的使用

导入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>spring-study-again</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.4</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.20</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.23</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.7.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.12</version>
        </dependency>
    </dependencies>

</project>

数据库连接信息

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/study_spring_again?useSSL=false&serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8
jdbc.username=root
jdbc.password=123456

配置xml

<?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"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/aop
       https://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--引入数据库配置信息 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置数据库连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close">
        <property name="url" value="${jdbc.url}"/>
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--创建JdbcTemplate对象-->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <!--注入数据库连接池-->
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--开启注解扫描-->
    <context:component-scan base-package="com.jdbc"/>
</beans>
@AllArgsConstructor
@Data
@NoArgsConstructor
public class Book {
    private int bookId;
    private String bookName;
    private int deleteStatus;
}
public interface BookMapper {
    int insertBook(Book book);
}



@Repository
public class BookMapperImpl implements BookMapper{
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public int insertBook(Book book) {
        String sql="insert into book values(?,?,?)";
        Object[] args = {book.getBookId(),book.getBookName(),book.getDeleteStatus()};
        return jdbcTemplate.update(sql,args);
    }
}
public interface BookService {
    int insertBook(Book book);
}


@Service(value = "bookService")
public class BookServiceImpl implements BookService{
    @Autowired
    private BookMapper bookMapper;

    @Override
    public int insertBook(Book book) {
        return bookMapper.insertBook(book);
    }
}
 	@Test
    public void testJdbc() {
        ApplicationContext context = new ClassPathXmlApplicationContext("TestBean1.xml");
        BookService bookService = context.getBean("bookService", BookService.class);
        int insertBook = bookService.insertBook(new Book(3, "spring入门到入土", 0));
        System.out.println(insertBook);
    }