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我正在将 JPA 与休眠一起使用并尝试连接到数据源以检索信息，但是当我运行应用程序时，我没有收到任何错误，但是当我运行以下代码时没有显示结果。问题来自以前的帖子，位于此处当我设置环境以在 Glassfish 上使用 hibernate 对 JPA 进行一些测试时。

日志文件显示了这一点

INFO: Not binding factory to JNDI, no JNDI name configured

我的日志文件

INFO: Processing PersistenceUnitInfo [
    name: DBAppPU
    ...]
INFO: Binding entity from annotated class: model.VMatterDetails
INFO: Binding Named query: VMatterDetails.findAll => SELECT v FROM VMatterDetails v
INFO: Binding Named query: VMatterDetails.findByMatterInfoStatus => SELECT v FROM VMatterDetails v WHERE v.matterInfoStatus = :matterInfoStatus
INFO: Binding Named query: VMatterDetails.findByMatterInfoRespLwyr => SELECT v FROM VMatterDetails v WHERE v.matterInfoRespLwyr = :matterInfoRespLwyr
INFO: Binding Named query: VMatterDetails.findByMatterID => SELECT v FROM VMatterDetails v WHERE v.matterID = :matterID
INFO: Binding Named query: VMatterDetails.findByMatterInfoMatterNum => SELECT v FROM VMatterDetails v WHERE v.matterInfoMatterNum = :matterInfoMatterNum
INFO: Bind entity model.VMatterDetails on table vMatterDetails
INFO: Hibernate Validator not found: ignoring
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: Unable to find org.hibernate.search.event.FullTextIndexEventListener on the classpath. Hibernate Search is not enabled.
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: Initializing connection provider: org.hibernate.ejb.connection.InjectedDataSourceConnectionProvider
INFO: Using provided datasource
INFO: RDBMS: Microsoft SQL Server, version: 10.50.1600
INFO: JDBC driver: jTDS Type 4 JDBC Driver for MS SQL Server and Sybase, version: 1.2.5
INFO: Using dialect: org.hibernate.dialect.SQLServerDialect
INFO: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4
INFO: Transaction strategy: org.hibernate.ejb.transaction.JoinableCMTTransactionFactory
INFO: instantiating TransactionManagerLookup: org.hibernate.transaction.SunONETransactionManagerLookup
INFO: instantiated TransactionManagerLookup
INFO: Automatic flush during beforeCompletion(): disabled
INFO: Automatic session close at end of transaction: disabled
INFO: Scrollable result sets: enabled
INFO: JDBC3 getGeneratedKeys(): enabled
INFO: Connection release mode: auto
INFO: Default batch fetch size: 1
INFO: Generate SQL with comments: disabled
INFO: Order SQL updates by primary key: disabled
INFO: Order SQL inserts for batching: disabled
INFO: Query translator: org.hibernate.hql.ast.ASTQueryTranslatorFactory
INFO: Using ASTQueryTranslatorFactory
INFO: Query language substitutions: {}
INFO: JPA-QL strict compliance: enabled
INFO: Second-level cache: enabled
INFO: Query cache: disabled
INFO: Cache region factory : org.hibernate.cache.impl.NoCachingRegionFactory
INFO: Optimize cache for minimal puts: disabled
INFO: Structured second-level cache entries: disabled
INFO: Statistics: disabled
INFO: Deleted entity synthetic identifier rollback: disabled
INFO: Default entity-mode: pojo
INFO: Named query checking : enabled
INFO: Check Nullability in Core (should be disabled when Bean Validation is on): disabled
INFO: building session factory
INFO: Not binding factory to JNDI, no JNDI name configured
INFO: Running hbm2ddl schema update
INFO: fetching database metadata
INFO: updating schema
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: table found: DB12248.dbo.vMatterDetails
INFO: columns: [clientinfostrextra1, matterinfobudgetdisbs, addressinfohomefaxphone, addressinfocompany, addressinfoaddrline2, addressinfoaddrline1, addressinfopager, matterinfodestroydate, matterinfolasttrust, matterinfobilledrcpts, addressinfolastname, matterinfoamtquoted, addressinfoattposition, matterinfolastsoadate, matterinfobilledhours, matterinfoextracasenote2, matterinfoextracasenote1, addressinfoaddrgroup, matterinfobilleddisbs, addressinfowebpage, addressinfohomephone, clientinfoextra2, clientinfoextra1, matterinfostatus, matterinfoextracasenote5, matterinfobilladdid2, matterinfoextracasenote6, matterinfoextracasenote3, matterinfoextracasenote4, addressinfomiddle, addressinfointernetaddr, matterinfoactivematter, clientinfomatterext, matterinfosparelong2, matterinfosparelong1, lawyerid, matterinforeferredbytype, matterid, matterinfobilladdid, matterinfosortname, matterinfodefrateamt, matterinfodefratetype, matterinfodocumentpath, matterinfototfees, matterinfoformatfile, addressinfocarphone, addressinfoextra, matterinfocredithold, matterinfocasenotes, matterinfortnrbal, addressinfohomeemail, matterinfofilelocation, matterinfoextracollectnote4, addressinfocity, matterinfochargeint, matterinfoextracollectnote3, matterinfoextracollectnote6, matterinfoextracollectnote5, addressinfosuffix, matterinfoopendate, matterinfobudgetfees, matterinfoflags, clientinfosortname, clientinfoclientdefault, addressinfofirst, matterinfointerestsettings, matterinfoextracollectnote2, clientinfomatterbase, matterinfoextracollectnote1, addressinfocode, matterinfosoaformat, addressinfocountry, matterinfofiledesc, matterinforeflwyr, matterinfousedefintrate, addressinfoaddrtype, matterinfomatternum, matterinforeferredby, matterinfotypeoflaw, addressinfocellphone, matterinfocollectionnotes, clientinfodocumentpath, matterinfobilledfees, matterinfosparestring, matterinfoarbal, matterinfolastbilled, matterinfolastrcptamount, matterinfototdisbs, addressinfoattlast, matterinfototalhours, matterinfotaxdisbs, matterinfosparedouble, matterinforesplwyr, matterinfolastfeedate, matterinfointrate, addressinfobusphone, addressinfoprov, matterinfocrossreference, addressinfofaxphone, matterinfolastrcptdate, matterinfototrcpts, addressinfotitle, matterinfolastdisbdate]
INFO: foreign keys: []
INFO: indexes: [pk__vmatterd__4d8e0b1a0b5cafea]
INFO: schema update complete
INFO: JNDI InitialContext properties:{}
INFO: Portable JNDI names for EJB VMatterDetailsFacade : [java:global/DBApp/VMatterDetailsFacade, java:global/DBApp/VMatterDetailsFacade!ejb.VMatterDetailsFacadeLocal]
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: Loading application DBApp at /DBApp
INFO: DBApp was successfully deployed in 3,374 milliseconds.
INFO: Find All Executing
INFO: Find All Return

EJB bean 是

@Stateless
public class VMatterDetailsFacade implements VMatterDetailsFacadeLocal {
    public static final Logger log = Logger.getLogger("ejb.VMatterDetailsFacade");

    @PersistenceUnit(unitName = "DBAppPU")
    private EntityManagerFactory emf;    

    private List<VMatterDetails> matterDetailsList;

    protected EntityManager getEntityManager() {
        return emf.createEntityManager();
    }


    @Override
    public VMatterDetails find(String str) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public List<VMatterDetails> findAll() {
        log.info("Find All Executing");
        matterDetailsList = emf.createEntityManager().createNamedQuery("VMatterDetails.findAll").getResultList();
//        matterDetails.addAll(em2.createNamedQuery("VMatterDetails.findAll").getResultList());
        log.info("Find All Return");
        return matterDetailsList;
    }
    @Override
    public int count() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

我的持久性 xml 是

<?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="DBAppPU" transaction-type="JTA">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>matterPool12248</jta-data-source>
    <properties>
      <property name="hibernate.hbm2ddl.auto" value="update"/>
    </properties>
  </persistence-unit>
</persistence>
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1 回答 1

2

您粘贴的日志没有显示任何ERROR(nor FATALnor WARNING) 消息，并且您显示的特定消息只是告诉您没有绑定SessionFactory到 JNDI。这并没有什么问题，许多应用程序不使用JNDI 绑定的 SessionFactory，这在使用 JPA 时并不真正相关。所以请忽略这个INFO理性信息。

实际上，根据日志文件，一切看起来都很好：已检测到您的实体，已处理命名查询，已更新架构（因此与数据库的连接正常）等。

话虽如此，我将首先激活 SQL 日志记录以查看到底发生了什么（这不会解决问题，但仍然如此）。您可以在 中设置以下属性persistence.xml：

<!-- Echo all executed SQL to stdout -->
<property name="hibernate.show_sql" value="true"/>

或者（我更喜欢这个选项，因为无论如何我都希望更好地控制日志记录），通过将日志记录级别设置为调试以下类别：

org.hibernate.SQL

并对数据库运行生成的 SQL。

第二件事，我建议使用注入的容器管理EntityManager而不是使用管理的应用程序EntityManager（这是在托管环境中的首选方式）：

@Stateless
public class VMatterDetailsFacade implements VMatterDetailsFacadeLocal {
    public static final Logger log = Logger.getLogger("ejb.VMatterDetailsFacade");

    @PersistenceContext(unitName = "DBAppPU")
    private EntityManager em;

    @Override
    public VMatterDetails find(String str) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public List findAll() {
        log.info("Find All Executing");
        List matterDetailsList = em.createNamedQuery("VMatterDetails.findAll")
            .getResultList();
        log.info("Find All Return");
        return matterDetailsList;
    }
    @Override
    public int count() {
        throw new UnsupportedOperationException("Not supported yet.");
    }
    ...
}

但同样，这只是一个旁注，这不会解决你的问题。

首先检查生成的 SQL，然后用结果更新您的问题。如果查询返回数据，请告诉我们您是如何检查 bean 方法不起作用的。

参考

于 2010-09-03T02:20:13.950 回答