Question

大家好我正在尝试使用HQL编辑器从我的数据库中检索数据。我按照示例“在Java Swing应用程序中使用Hibernate”中的步骤进行操作。我的配置文件如下：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
  <session-factory>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/mobilecarriers?zeroDateTimeBehavior=convertToNull</property>
    <property name="hibernate.connection.username">root</property>
    <property name="hibernate.connection.password">######</property>
    <property name="hibernate.show_sql">true</property>
    <property name="hibernate.query.factory_class">org.hibernate.hql.classic.ClassicQueryTranslatorFactory</property>
    <property name="hibernate.c3p0.min_size">1</property>
    <property name="hibernate.c3p0.max_size">100</property>
    <property name="hibernate.c3p0.timeout">0</property>
    <property name="hibernate.c3p0.max_statements">0</property>
    <property name="hibernate.c3p0.idle_test_period">0</property>
    <mapping resource="mobilecarriers/entity/National.hbm.xml"/>
  </session-factory>
</hibernate-configuration>

映射：

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated 23 Sep 2012 11:26:47 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
    <class name="mobilecarriers.entity.National" table="national" catalog="mobilecarriers">
        <id name="id" type="java.lang.Short">
            <column name="id" />
            <generator class="identity" />
        </id>
        <property name="dominantSecondLanguage" type="string">
            <column name="DominantSecondLanguage" length="25" />
        </property>
    </class>
</hibernate-mapping>

使用此：from national或from National我收到以下错误：

org.hibernate.exception.SQLGrammarException：无法执行查询在 org.hibernate.exception.SQLStateConverter.convert（SQLStateConverter.java:67）在 org.hibernate.exception.JDBCExceptionHelper.convert（JDBCExceptionHelper.java:43）在org.hibernate.loader.Loader.doList（Loader.java:2223）at org.hibernate.loader.Loader.listIgnoreQueryCache（Loader.java:2104）at at org.hibernate.loader.Loader.list（Loader.java:2099）at org.hibernate.hql.classic.QueryTranslatorImpl.list（QueryTranslatorImpl.java:912）在 org.hibernate.engine.query.HQLQueryPlan.performList（HQLQueryPlan.java:172）在org.hibernate.impl.SessionImpl.list（SessionImpl.java:1121）at org.hibernate.impl.QueryImpl.list（QueryImpl.java:79）引起： com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException：你有一个 SQL语法错误;查看与您的手册相对应的手册 MySQL服务器版本，使用“从极限100”附近使用正确的语法在第1行 sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）在 sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:57）在 sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）在java.lang.reflect.Constructor.newInstance（Constructor.java:525）在com.mysql.jdbc.Util.handleNewInstance（Util.java:411）at com.mysql.jdbc.Util.getInstance（Util.java:386）at com.mysql.jdbc.SQLError.createSQLException（SQLError.java:1052）at at com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3609）at at com.mysql.jdbc.MysqlIO.checkErrorPacket（MysqlIO.java:3541）at at com.mysql.jdbc.MysqlIO.sendCommand（MysqlIO.java:2002）at at com.mysql.jdbc.MysqlIO.sqlQueryDirect（MysqlIO.java:2163）at at com.mysql.jdbc.ConnectionImpl.execSQL（ConnectionImpl.java:2624）at com.mysql.jdbc.PreparedStatement.executeInternal（PreparedStatement.java:2127）在 com.mysql.jdbc.PreparedStatement.executeQuery（PreparedStatement.java:2293）在 org.hibernate.jdbc.AbstractBatcher.getResultSet（AbstractBatcher.java:186）在org.hibernate.loader.Loader.getResultSet（Loader.java:1787）at org.hibernate.loader.Loader.doQuery（Loader.java:674）at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections（Loader.java:236）在org.hibernate.loader.Loader.doList（Loader.java:2220）... 8更多

Answer 1

使用

from mobilecarriers.entity.National

使用HQL编辑器进行查询时出现Hibernate错误

1 个答案: