Spring为传统的jdbc API进行封装,简化持久层操作,虽然jdbcTemplate很灵活，但和ORM框架相比jdbcTemplate功能就显得力不从心了,学习jdbcTemplate是为学习ORM框架做铺垫
ORM:对象关系映射 O:对象 R:关系 M:映射
下面简单介绍下 Springboot 应用中如何使用 JdbcTemplate 对数据库进行操作；
1、使用 IDEA 创建 SpringBoot 项目，引入数据库连接依赖：
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.1.10</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.15</version>
</dependency>
2、MYSQL 数据库建测试表
CREATE TABLE `book` ( `book_id` INT(11) NOT NULL AUTO_INCREMENT, `book_name` VARCHAR(200) DEFAULT NULL, `price` INT(11) DEFAULT NULL, PRIMARY KEY (`book_id`) ) ENGINE=INNODB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8
3、创建 bean
/**
* @author wdh01
* @create 2020-04-29 23:59
*/
public class Book {
private Integer id;
private String book_name;
private double price;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getBook_name() {
return book_name;
}
public void setBook_name(String book_name) {
this.book_name = book_name;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
}
4、编写 service
@Service
public class BookService {
@Autowired
JdbcTemplate jdbcTemplate;
//insert
public Integer addBook(Book book) {
return jdbcTemplate.update("insert book (book_name,price) values (?,?)", book.getBook_name(), book.getPrice());
}
//update 操作
public Integer updateBook(Book book) {
return jdbcTemplate.update("update book set price = ? where book_id = ?", book.getPrice(),book.getId());
}
//delete
public Integer deleteBook(Book book) {
return jdbcTemplate.update("delete from book where book_id = ?",book.getId());
}
}
5、编写测试类
@SpringBootTest
class JdbctemplateApplicationTests {
@Autowired
BookService bookService;
@Test
void contextLoads() {
Book book = new Book();
book.setBook_name("笑傲江湖");
book.setPrice(120);
bookService.addBook(book);
}
@Test
public void testUpdate() {
Book book = new Book();
book.setPrice(10);
book.setId(5);
bookService.updateBook(book);
}
@Test
public void testDelete() {
Book book = new Book();
book.setId(5);
bookService.deleteBook(book);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
