使用glassfish的数据库连接出现持久性异常

Question

我是玻璃鱼的新手

异常[Eclipse链接-4002]（Eclipse持久性服务-2.3.2. v20111125-r10461）：org.eclipse.persistence.exceptions.数据库异常内部异常：java.sql.SQLExc0019：未选择数据库错误代码： 1046

在运行服务器之前，我确保服务器配置是使用以下指南完成的： mysql站点手册使用glassfish连接器，并配置我的persistence.xml如下：

<persistence version="2.0" 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_2_0.xsd">
<persistence-unit name="StudentRecipieWebsite" transaction-type="RESOURCE_LOCAL">
    <non-jta-data-source>jdbc/mySql</non-jta-data-source>
    <class>il.musehunter.studentRecipes.dbModel.Image</class>
    <class>il.musehunter.studentRecipes.dbModel.Ingrediant</class>
    <class>il.musehunter.studentRecipes.dbModel.Recipe</class>
    <class>il.musehunter.studentRecipes.dbModel.User</class>
    <properties>
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/recipes_data"/>
        <property name="javax.persistence.jdbc.user" value="root"/>
        <property name="javax.persistence.jdbc.password" value="moshe1475"/>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
        <property name="eclipselink.jdbc.batch-writing" value="JDBC"/>
    </properties>
</persistence-unit>

我真的是新手，不知道下一步该做什么，所以非常感谢您的帮助。

编辑：

从我的glassfish服务器添加部分domain.xml：

<applications>
<application context-root="/StudentRecipieWebsite" location="${com.sun.aas.instanceRootURI}/applications/StudentRecipieWebsite/" name="StudentRecipieWebsite" object-type="user">
  <property name="appLocation" value="${com.sun.aas.instanceRootURI}/applications/__internal/StudentRecipieWebsite/StudentRecipieWebsite.war"></property>
  <property name="org.glassfish.ejb.container.application_unique_id" value="89812698949156864"></property>
  <property name="org.glassfish.persistence.app_name_property" value="StudentRecipieWebsite"></property>
  <property name="defaultAppName" value="StudentRecipieWebsite"></property>
  <module name="StudentRecipieWebsite">
    <engine sniffer="ejb"></engine>
    <engine sniffer="security"></engine>
    <engine sniffer="jpa"></engine>
    <engine sniffer="web"></engine>
  </module>
</application>

以及：

<resources>
<jdbc-resource pool-name="__TimerPool" jndi-name="jdbc/__TimerPool" object-type="system-admin"></jdbc-resource>
<jdbc-resource pool-name="DerbyPool" jndi-name="jdbc/__default"></jdbc-resource>
<jdbc-connection-pool datasource-classname="org.apache.derby.jdbc.EmbeddedXADataSource" res-type="javax.sql.XADataSource" name="__TimerPool">
  <property name="databaseName" value="${com.sun.aas.instanceRoot}/lib/databases/ejbtimer"></property>
  <property name="connectionAttributes" value=";create=true"></property>
</jdbc-connection-pool>
<jdbc-connection-pool is-isolation-level-guaranteed="false" datasource-classname="org.apache.derby.jdbc.ClientDataSource" res-type="javax.sql.DataSource" name="DerbyPool">
  <property name="PortNumber" value="1527"></property>
  <property name="Password" value="APP"></property>
  <property name="User" value="APP"></property>
  <property name="serverName" value="localhost"></property>
  <property name="DatabaseName" value="sun-appserv-samples"></property>
  <property name="connectionAttributes" value=";create=true"></property>
</jdbc-connection-pool>
<jdbc-connection-pool datasource-classname="com.mysql.jdbc.jdbc2.optional.MysqlDataSource" res-type="javax.sql.DataSource" name="MySQLConnPool">
  <property name="portNumber" value="3306"></property>
  <property name="databaseName" value="recipes_data"></property>
  <property name="serverName" value="localhost"></property>
  <property name="user" value="root"></property>
  <property name="password" value="moshe1475"></property>
  <property name="URL" value="jdbc:mysql://:3306/"></property>
</jdbc-connection-pool>
<jdbc-resource pool-name="MySQLConnPool" description="" jndi-name="jdbc/mySql"></jdbc-resource></resources>

Answer 1

我的第一个猜测是，数据源定义中的连接URL不太正确，因为“No database selected Error Code:1046”是一个MySQL错误。

如果您已经在应用程序服务器中定义了数据源，则不需要在persistence.xml中配置数据源（这是常见的方式）。你可以发布数据源定义从你的$GLASSFISH_HOME/glassfish/域/$GLASSFISH_DOMAIN/config/domain.xml？

这是一个持久性的例子。我从我的一个项目（或多或少来自Netbeans模板）中获取的xml可能会帮助您：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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_2_0.xsd">

  <persistence-unit name="MyPU" transaction-type="JTA">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>jdbc/sample</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
       <property name="eclipselink.ddl-generation" value="create-tables"/>
    </properties>
  </persistence-unit>
</persistence>

祝你好运

对评论的答复：

您需要将数据库名称添加到URL：

<property name="URL" value="jdbc:mysql://nameOrIPOfYourServerOrLocalhost:3306/nameOfYourDatabase"></property>

这应该能解决问题。