spring5入门（十四）：JdbcTemplate使用，添加数据

• JdbcTemplate简介

Spring 框架对 JDBC 进行封装，使用 JdbcTemplate 方便实现对数据库操作

• 导入所需依赖
  

• 新建表
  

• 代码实现
  

# 实体类
public class Book {

    private Integer id;

    private String name;

    private String price;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPrice() {
        return price;
    }

    public void setPrice(String price) {
        this.price = price;
    }

}

# 持久层接口
public interface BookDao {

    void addBook(Book book);

}

# 持久层实现
@Repository
public class BookDaoImpl implements BookDao {

    //注入 JdbcTemplate
    @Autowired
    private JdbcTemplate jdbcTemplate;

    @Override
    public void addBook(Book book) {
        //1 创建 sql 语句
        String sql = "insert into book values(?,?,?)";
        //2 调用方法实现
        Object[] args = {book.getId(), book.getName(), book.getPrice()};
        int update = jdbcTemplate.update(sql,args);
        System.out.println(update);
    }

}

# 业务层
@Service
public class BookService {

    //注入 dao
    @Autowired
    private BookDao bookDao;

    public void addBook(Book book){
        bookDao.addBook(book);
    }

}

# 测试方法
public class Test1 {

    @Test
    public void testAdd() {
        ApplicationContext context =
                new ClassPathXmlApplicationContext("bean1.xml");
        BookService bookService = context.getBean("bookService", BookService.class);
        Book book = new Book();
        book.setId(1);
        book.setName("java");
        book.setPrice("12");
        bookService.addBook(book);
    }

}

# bean.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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
                        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- 组件扫描 -->
    <context:component-scan base-package="com.ychen"></context:component-scan>

    <!-- 数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          destroy-method="close">
        <property name="url" value="jdbc:mysql://127.0.0.1:3306/jdbc" />
        <property name="username" value="root" />
        <property name="password" value="123456" />
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver" />
    </bean>

    <!-- JdbcTemplate对象 -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <!--注入dataSource-->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
</beans>

# 控制台
4月 19, 2022 10:11:26 下午 com.alibaba.druid.support.logging.JakartaCommonsLoggingImpl info
信息: {dataSource-1} inited
1

Process finished with exit code 0

• 查看数据库，是否添加成功