我知道这个问题在持久性用户中很常见。我已经访问了那么多论坛上的那么多主题和问题，但我仍然没有得到解决方案。

我已经从数据库创建了RESTful web 服务(Netbeans 8.0.2 中的一个选项)。 我还为这个项目创建了连接池和 JNDI。名称已正确给出，如下所示。

默认情况下使用 EclipseLink (JPA 2.1) 我收到了这样的回复:

GET RequestFailed RequestFailed --> Status: (500) Response: { HTTP Status 500 - Internal Server Error

type Exception report

messageInternal Server Error

descriptionThe server encountered an internal error that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: javax.ejb.EJBException

root cause

javax.ejb.EJBException

root cause

javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException Internal Exception: java.sql.SQLException: No database selected Error Code: 1046 Call: SELECT id, access_expires, access_token, address, bank_account_type, created, device_id, device_type, email, facebook_id, grazie_code, latitude, longitude, password, phone_number, profile_pic, refresh_expires, refresh_token, reg_id, token_created, total_balance, type_work, user_name, user_type FROM users Query: ReadAllQuery(referenceClass=Users sql="SELECT id, access_expires, access_token, address, bank_account_type, created, device_id, device_type, email, facebook_id, grazie_code, latitude, longitude, password, phone_number, profile_pic, refresh_expires, refresh_token, reg_id, token_created, total_balance, type_work, user_name, user_type FROM users")

root cause

Exception [EclipseLink-4002] (Eclipse Persistence Services - 2.5.2.v20140319-9ad6abd): org.eclipse.persistence.exceptions.DatabaseException Internal Exception: java.sql.SQLException: No database selected Error Code: 1046 Call: SELECT id, access_expires, access_token, address, bank_account_type, created, device_id, device_type, email, facebook_id, grazie_code, latitude, longitude, password, phone_number, profile_pic, refresh_expires, refresh_token, reg_id, token_created, total_balance, type_work, user_name, user_type FROM users Query: ReadAllQuery(referenceClass=Users sql="SELECT id, access_expires, access_token, address, bank_account_type, created, device_id, device_type, email, facebook_id, grazie_code, latitude, longitude, password, phone_number, profile_pic, refresh_expires, refresh_token, reg_id, token_created, total_balance, type_work, user_name, user_type FROM users")

root cause

java.sql.SQLException: No database selected

note The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.1 logs. GlassFish Server Open Source Edition 4.1

我的 persistence.xml 文件是这样的:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="dwolla_apiPU" transaction-type="JTA">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <jta-data-source>jdbc/dwolla</jta-data-source>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <shared-cache-mode>ALL</shared-cache-mode>
    <properties>
        <property name="eclipselink.target-database" value="MySQL"/>
        <property name="eclipselink.logging.logger" value="DefaultLogger"/>
        <property name="eclipselink.ddl-generation" value="create-tables"/>
        <property name="eclipelink.logging.level" value="FINEST"/>
        <!-- JDBC connection properties -->
        <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/dwolla"/>
        <property name="javax.persistence.jdbc.user" value="root"/>
        <property name="javax.persistence.jdbc.password" value=""/>
        <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
        <property name="eclipselink.jdbc.batch-writing" value="JDBC"/>
        <property name="javax.persistence.schema-generation.database.action" value="create-tables"/>
    </properties>
  </persistence-unit>
</persistence>

域.xml:

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

最佳答案

我找到了解决方案。如您所见，我已经编辑了 glassfish 服务器的 domain.xml 并设置了连接池属性和 JNDI。我去了 glassfish 管理控制台并编辑了连接池，我发现服务器无法识别我所做的更改。它显示的 URL 属性如“jdbc:mysql://:3306/”，不知道为什么它没有从 domain.xml 中获取属性，但现在它终于可以工作了。

关于java - 内部异常 : java. sql.SQLException:未选择数据库，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27443958/