发布于 2014-07-21 23:32:16 | 228 次阅读 | 评论: 0 | 来源: 网友投递
Commons DbUtils开源 JDBC 工具类库
Commons DbUtils是 Apache 组织提供的一个开源 JDBC 工具类库，对传统操作数据库的类进行二次封装，可以把结果集转化成List,Map等。
Apache Commons DbUtils 1.6 发布，主要改进内容包括：
ArrayHandler should return an empty array when handle has no rows Fixes DBUTILS-110.
Order of columns not retained in BasicRowProcessor with HashMap Fixes DBUTILS-114.
BeanProcessor not returning nanoseconds Fixes DBUTILS-118.
Add support for conversion of ResultSet strings to enums in the BeanProcessor Fixes DBUTILS-113.
In BeanProcessor#isCompatibleType, can Integer.class.isInstance(value) be replaced by value instanceof Integer (etc)? Simplified code by using instanceof. Fixes DBUTILS-85.
DBUtils can't build using JDK 1.7 - DriverProxy needs to implement getParentLogger() Add dynamic invocation. Fixes DBUTILS-106.
Create functionality to return auto-generated keys in batches of SQL inserts Fixes DBUTILS-108.
Patch QueryLoader to also load from XML properties files Fixes DBUTILS-107.
Updated the use of getColumnName to try getColumnLabel first Fixes DBUTILS-100.
Add missing JavaDoc to QueryRunner#insert Fixes DBUTILS-98.
Add an Abstract ResultSetHandler implementation in order to reduce redundant 'resultSet' variable invocation Fixes DBUTILS-97.
DbUtils#loadDriver(ClassLoader,String) makes DriverManager throwing "No suitable driver found for jdbc" if ClassLoader is not the System's one Fixes DBUTILS-96.
Added insert methods to QueryRunner and AsyncQueryRunner that return the generated key. Fixes DBUTILS-87.
此版本源代码和二进制包都已提供下载。
Maven： <groupId>commons-dbutils</groupId> <artifactId>commons-dbutils</artifactId> <version>1.6</version>
更多更新内容请看发行说明。
原则上这不能说是一个持久层框架，它提供了一些Jdbc的操作封装来简化数据查询和记录读取操作。本站就是采用这个项目来读写数据库，代码非常简洁，如果你厌烦了Hibernate的庞大，不妨可以试试——DbUtils。
给出一小段代码看看DbUtils是怎么用的：
QueryRunner run = new QueryRunner(dataSource); // Use the BeanHandler implementation to convert the first
// ResultSet row into a Person JavaBean. ResultSetHandler h = new BeanHandler(Person.class); // Execute the SQL statement with one replacement parameter and
// return the results in a new Person object generated by the BeanHandler. Person p = (Person) run.query("SELECT * FROM Person WHERE name=?", "John Doe", h);