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최대 절전 모드로 5 서점 샘플은, 내가 최대 절전 모드 사용 persistence.xml 파일을 변경 한 :JavaEE 어플 제이 보스 4.0 실행하고 내가 넷빈즈 (JavaEE5 샘플)에서 bookstore1 웹 응용 프로그램을 배포하려고 할 때
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
<persistence-unit name="book" transaction-type="JTA">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<jta-data-source>java:/jdbc/BookDB</jta-data-source>
<class>com.sun.bookstore.database.Book</class>
</persistence-unit>
</persistence>
및 내 mysql-ds.xml 파일은 다음과 같습니다
<?xml version="1.0" encoding="UTF-8"?>
<datasources>
<local-tx-datasource>
<jndi-name>jdbc/BookDB</jndi-name>
<connection-url>jdbc:mysql://localhost:3306/bookdb</connection-url>
<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name>
<password>1234</password>
<exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.MySQLExceptionSorter</exception-sorter-class-name>
<metadata>
<type-mapping>mySQL</type-mapping>
</metadata>
</local-tx-datasource>
</datasources>
나는 오류가 아래에 무엇입니까 :
[STDOUT] Couldn't create bookstore database bean: null
19:16:53,846 INFO [[/bookstore1]] Marking servlet ShowCartServlet as unavailable
19:16:53,846 ERROR [[ShowCartServlet]] Allocate exception for servlet ShowCartServlet
javax.servlet.UnavailableException: Couldn't get database.
at com.sun.bookstore1.servlets.ShowCartServlet.init(ShowCartServlet.java:39)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:806)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
19:17:17,534 INFO [[ShowCartServlet]] Servlet ShowCartServlet is currently unavailable
당신이