Posted on 2008-06-04 16:04
G_G 閱讀(1765)
評論(0) 編輯 收藏 所屬分類:
xml Related 、
javaGeneral
官方：
eg：xquery使用
import?org.basex.core.Commands;
import?org.basex.core.proc.Proc;
import?org.basex.data.Result;
import?org.basex.io.ConsoleOutput;
import?org.basex.query.QueryException;
import?org.basex.query.QueryProcessor;
import?org.basex.query.xquery.XQueryProcessor;
/**
?*?This?class?serves?an?example?for?executing?XQuery?requests.
?*/
public?final?class?XQueryExample?{
??/**?Sample?query.?*/
??private?static?final?String?XMLFILE?=?XPathExample.class.getClassLoader().getSystemResource(
??????????????"xx.xml"
?????????).getPath();
??
??
??private?static?final?String?QUERY?=?"?for?$x?in?doc('"+XMLFILE+"')//property?"?+
??????????????????????????????????????????????"?return?<child>{data($x/@name)}</child>";
??/**?Private?constructor.?*/
??private?XQueryExample()?{?}
??/**
???*?Main?method?of?the?example?class.
???*?@param?args?(ignored)?command-line?arguments
???*?@throws?Exception?exception
???*/
??public?static?void?main(final?String[]?args)?throws?Exception?{
????//?FIRST?EXAMPLE:
????System.out.println("First?example:");
????//?create?standard?output?stream
????final?ConsoleOutput?out?=?new?ConsoleOutput(System.out);
????//?Create?a?BaseX?process
????final?Proc?proc?=?Proc.get(Commands.XQUERY,?QUERY);
????//?launch?process
????if(proc.execute())?{
??????//?successful?execution:?print?result
??????proc.output(out);
????}?else?{
??????//?execution?failed:?print?result
??????proc.info(out);
????}
????out.flush();
????System.out.println();
????
????//?SECOND?EXAMPLE?(ALTERNATIVE):
????System.out.println("Second?example:");
????//?Execute?XQuery?request
????try?{
??????//?create?query?instance
??????final?QueryProcessor?xquery?=?new?XQueryProcessor(QUERY);
??????//?execute?query;?no?initial?context?set?is?specified?(null)
??????final?Result?result?=?xquery.query(null);
??????//?print?output
??????result.serialize(out,?false);
??????out.println();
????}?catch(final?QueryException?e)?{
??????//?dump?stack?trace
??????e.printStackTrace();
????}
????//?close?output?stream
????out.close();
??}
}
結果：
First?example:
<child>connection.datasource</child>
<child>dialect</child>
<child>show_sql</child>
<child>hibernate.cache.provider_class</child>
<child>cache.use_query_cache</child>
Second?example:
<child>connection.datasource</child>
<child>dialect</child>
<child>show_sql</child>
<child>hibernate.cache.provider_class</child>
<child>cache.use_query_cache</child>
數據來源：xx.xml
<?xml?version='1.0'?encoding='utf-8'?>
<hibernate-configuration>
????<session-factory>
????????<property?name="connection.datasource">java:comp/env/jdbc/USERPORTAL1</property>
????????<property?name="dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
?????????<property?name="show_sql">true</property>
?????????<property?name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property>
?????????<property?name="cache.use_query_cache">true</property>
????<!--?JDBC?connection?pool?(use?the?built-in)?-->
????</session-factory>
</hibernate-configuration>