# 用Jersey构建RESTful服务6--Jersey+SQLServer+Hibernate4.3 ## 一、总体说明 本例运行演示了用Jersey构建RESTful服务中,如何同过Hibernate将数据持久化进SQLServer的过程 ## 二、环境 1. 上文的项目RestDemo 2. SQLServer2005 3. jtds数据库连接驱动:下载地址[最新版本](http://sourceforge.net/projects/jtds/files/latest/download?source=files),替换掉上文项目中的`mysql-connector` ## 三、配置 1. 与上文mysql的配置不同点主要在hibernate.cfg.xml文件; 配置如下: ``` <?xml version='1.0' encoding='utf-8'?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- Database connection settings --> <property name="connection.driver_class">net.sourceforge.jtds.jdbc.Driver</property> <property name="connection.url">jdbc:jtds:sqlserver://192.168.1.10:1433;RestDemo</property> <property name="connection.username">sa</property> <property name="connection.password">aA123456</property> <property name="hibernate.default_schema">RestDemo</property> <!-- JDBC connection pool (use the built-in) --> <property name="connection.pool_size">1</property> <!-- SQL dialect --> <property name="dialect">org.hibernate.dialect.SQLServerDialect</property> <!-- Enable Hibernate's automatic session context management --> <property name="current_session_context_class">thread</property> <!-- Disable the second-level cache --> <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property> <!-- Echo all executed SQL to stdout --> <property name="show_sql">true</property> <!-- Drop and re-create the database schema on startup --> <property name="hbm2ddl.auto">update</property> <mapping resource="com/waylau/rest/bean/User.hbm.xml"/> </session-factory> </hibernate-configuration> ``` 2. 修改于mysql不兼容的sql语句`com.waylau.rest.dao.impl`中的`UserDaoImpl`: getUserById修改成如下: ``` @Override public User getUserById(String id) { SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); Session s = null; Transaction t = null; User user = null; try{ s = sessionFactory.openSession(); t = s.beginTransaction(); String hql = "from User where userId='"+id+"'"; Query query = s.createQuery(hql); user = (User) query.uniqueResult(); t.commit(); }catch(Exception err){ t.rollback(); err.printStackTrace(); }finally{ s.close(); } return user; } ``` getAllUsers给成如下: ``` @Override public List<User> getAllUsers() { SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); Session s = null; Transaction t = null; List<User> uesrs = null; try{ s = sessionFactory.openSession(); t = s.beginTransaction(); String hql = "select * from [RestDemo].dbo.t_user"; Query query = s.createSQLQuery(hql).addEntity(User.class); //query.setCacheable(true); // 设置缓存 uesrs = query.list(); t.commit(); }catch(Exception err){ t.rollback(); err.printStackTrace(); }finally{ s.close(); } return uesrs; } ``` 或者如下: ``` @Override public List<User> getAllUsers() { SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); Session s = null; Transaction t = null; List<User> uesrs = null; try{ s = sessionFactory.openSession(); t = s.beginTransaction(); String hql = " from User"; Query query = s.createQuery(hql); //query.setCacheable(true); // 设置缓存 uesrs = query.list(); t.commit(); }catch(Exception err){ t.rollback(); err.printStackTrace(); }finally{ s.close(); } return uesrs; } ``` ## 四、问题 ### 可能会出现如下错误 ``` ERROR: 指定的架构名称 "RestDemo" 不存在,或者您没有使用该名称的权限。 三月 26, 2014 3:38:43 下午 org.hibernate.tool.hbm2ddl.SchemaUpdate execute INFO: HHH000232: Schema update complete Hibernate: insert into RestDemo.T_USER (userName, age, USERID) values (?, ?, ?) 三月 26, 2014 3:38:43 下午 org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions WARN: SQL Error: 208, SQLState: S0002 三月 26, 2014 3:38:43 下午 org.hibernate.engine.jdbc.spi.SqlExceptionHelper logExceptions ERROR: 对象名 'RestDemo.T_USER' 无效。 ``` ### 解决方案: 将配置文件中的`hibernate.default_schema`值修改为如下即可: ``` <property name="hibernate.default_schema">RestDemo.dbo</property> ``` 或者去掉上面的配置,在“User.hbm.xml”修改如下 ``` <class name="User" table="T_USER" schema="RestDemo.dbo"> ``` **本章源码**:[https://github.com/waylau/RestDemo/tree/master/jersey-demo6-sqlserver-hibernate](https://github.com/waylau/RestDemo/tree/master/jersey-demo6-sqlserver-hibernate) [https://github.com/waylau/RestDemo/tree/master/jersey-demo6.2-sqlserver-hibernate](https://github.com/waylau/RestDemo/tree/master/jersey-demo6.2-sqlserver-hibernate)