SpringBoot学习6 - JdbcTemplate进行获取数据库的数据 - 不使用MyBatis

步骤1 添加依赖

<!--jdbc模板-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>

<!--中间件-->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
</dependency>

步骤2 全局配置数据源信息

application.yml

spring:
  # 数据源的配置
  datasource:
    username: root
    password: 123456
    url: jdbc:mysql://localhost:3306/test?serverTimezone=UTC
    driver-class-name: com.mysql.cj.jdbc.Driver

步骤3 使用JdbcTemplate

// 继承jdbcDaoSupport  或者  JdbcTemplate  都是可以的
@Repository
public class BookDaoImpl extends JdbcTemplate implements BookDao {
    
    // JdbcTemplate设置这里的内置数据源字段
    @Autowired
    public void setMyDataSource(DataSource dataSource) {
        setDataSource(dataSource);
    }
    
    @Override
    public List<Book> findAll() {
        String sql = "select * from book";

        List<Book> books = query(sql, new RowMapper<Book>() {
            
            // 设置 列名与Bean属性段的对应
            @Override
            public Book mapRow(ResultSet rs, int rowNum) throws SQLException {
                Book book = new Book();
                book.setId((Integer) rs.getObject("id"));
                book.setName((String) rs.getObject("name"));
                book.setAuthor((String) rs.getObject("author"));
                return book;
            }
            
        });
        return books;
    }
}