Apache Commons DbUtils 使用

灰太狼 2023-02-19 09:28 35阅读 0赞

## 介绍 ##

Apache Commons DbUtils  
The Apache Commons DbUtils package is a set of Java utility classes for easing JDBC development.

<dependency>
        <groupId>commons-dbutils</groupId>
        <artifactId>commons-dbutils</artifactId>
        <version>1.6</version>
    </dependency>

## 简单使用 ##

package mybatis.cn.db;
    
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;
    
    /** * @Author yanyg * @Date 2020/6/22 9:01 * @Descripetion admin */
    public class DbUtil { 
        private static String url = "jdbc:mysql://127.0.0.1:3306/nabs_base?useUnicode=true&characterEncoding=utf8mb4&useSSL=false";
        private static String username = "root";
        private static String password = "root";
    
        public static Connection getConnection() { 
            Connection conn = null;
            try { 
                Class.forName("com.mysql.jdbc.Driver");
            } catch (ClassNotFoundException e) { 
                e.printStackTrace();
            }
            try { 
                conn = DriverManager.getConnection(url, username, password);
            } catch (SQLException e) { 
                e.printStackTrace();
            }
            return conn;
        }
    }
    
    @RunWith(SpringRunner.class)
    @SpringBootTest
    public class DBUtilsTest { 
    
        @Test
        public  void testQuery() { 
            //创建连接
            Connection conn = DbUtil.getConnection();
            //创建SQL执行工具
            QueryRunner queryRunner = new QueryRunner();
            List<IdValidLogSum> list = null;
            try { 
                //执行SQL查询，并获取结果
                list = queryRunner.query(conn, "select * from person", new BeanListHandler<>(IdValidLogSum.class));
            } catch (SQLException e) { 
                e.printStackTrace();
            }
            if (list != null) { 
                //输出查询结果
                list.forEach(System.out::println);
            }
            //关闭数据库连接
            DbUtils.closeQuietly(conn);
        }
    
    }