- 技术人生
- 使用Digester解析XML文件和JAVA对象的映射
package
cn.hxex.exam.config;
import
java.util.Hashtable;
import
cn.hxex.exam.exception.ExamException;
public
class
ExamConfig
...
{ private Hashtable daos; public ExamConfig()...{ daos=new Hashtable(); } public void addDao(DAOConfig bean)...{ daos.put(bean.getId(), bean); } public DAOConfig getDAOConfig(String name)...{ DAOConfig config=(DAOConfig)daos.get(name); if(config==null)...{ throw new ExamException("couldn't find the bean:"+name); } return config; }}
package
cn.hxex.exam.config;
import
java.io.InputStream;
import
org.apache.commons.digester.Digester;
public
class
ExamConfigUtil
...
{ public static final String DEFAULT_CONFIG_FILE="ExamConfig.xml"; public static final ExamConfig MESSAGE_CONFIG; static...{ Digester digester=new Digester(); digester.setValidating(false); //初始化根配置对象 digester.addObjectCreate("config", "cn.hxex.exam.config.Examconfig"); digester.addSetProperties("config"); //初始化DAOConfig对象 digester.addObjectCreate("config/daos/dao", "cn.hxex.exam.config.DAOConfig"); digester.addSetProperties("config/daos/dao"); digester.addSetNext("config/dao/dao", "addDao","cn.hxex.exam.config.DAOConfig"); //读取配置文件 ClassLoader classLoader=Thread.currentThread().getContextClassLoader(); InputStream in=classLoader.getResourceAsStream(DEFAULT_CONFIG_FILE); ExamConfig config=null; try ...{ if(in!=null)...{ config=(ExamConfig)digester.parse(in); } } catch (Exception e) ...{ e.printStackTrace(); } MESSAGE_CONFIG=config; } public static ExamConfig getConfig()...{ return ExamConfigUtil.MESSAGE_CONFIG; } public static DAOConfig getDAOConfig(String name)...{ return MESSAGE_CONFIG.getDAOConfig(name); } }
<
config
>
<
daos
>
<
dao
id
="UserDAO"
type
="cn.hxex.exam.dao.hibernate.UserDAOHibernate"
/>
<
dao
id
="TeacherDAO"
type
="cn.hxex.exam.dao.hibernate.TeacherDAOHibernate"
/>
<
dao
id
="TestPaperDAO"
type
="cn.hxex.exam.dao.hibernate.TestPaperDAOHibernate"
/>
<
dao
id
="RoleDAO"
type
="cn.hxex.exam.dao.hibernate.RoleDAOHibernate"
/>
<
dao
id
="ClassesDAO"
type
="cn.hxex.exam.dao.hibernate.ClassesDAOHibernate"
/>
<
dao
id
="StudentDAO"
type
="cn.hxex.exam.dao.hibernate.StudentDAOHibernate"
/>
<
dao
id
="SelectQuestionDAO"
type
="cn.hxex.exam.dao.hibernate.SelectQuestionDAOHibernate"
/>
<
dao
id
="YesNoQuestionDAO"
type
="cn.hxex.exam.dao.hibernate.YesNoQuestionDAOHibernate"
/>
</
daos
>
<
cache
type
="cn.hxex.exam.cache.ehcache.EHCache"
>
<
property
name
="cachename"
value
="cache"
/>
</
cache
>
<
sysconfig
>
<
property
name
="superuser"
value
="super,test"
/>
</
sysconfig
>
</
config
>
