休眠错误-org.hibernate.hql.internal.ast.QuerySyntaxException
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【中文标题】休眠错误-org.hibernate.hql.internal.ast.QuerySyntaxException【英文标题】：Hibernate Error-org.hibernate.hql.internal.ast.QuerySyntaxException 【发布时间】：2014-03-25 17:29:18 【问题描述】：我正在尝试检索管理员输入的学生详细信息（即显示到学生页面）。但是这样做，我面临一个错误，即
org.apache.jasper.JasperException: An exception occurred processing JSP page /StuGenInfo_Stu.jsp at line 122
119: sessionn.beginTransaction();
120: String enroll=Stu_Name.getEnroll();
121: out.println(enroll);
122: Query query=sessionn.createQuery("from StuAcadDetails where ENROLLMENT_NUMBER="+enroll );
123: List<StuAcadDetails> detail=(List<StuAcadDetails>)query.list();
124:
125: for(StuAcadDetails stuDetails:detail)
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
root cause
org.hibernate.hql.internal.ast.QuerySyntaxException: StuAcadDetails is not mapped [from StuAcadDetails where ENROLLMENT_NUMBER=NU/A9/45055]
org.hibernate.hql.internal.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:180)
org.hibernate.hql.internal.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110)
org.hibernate.hql.internal.ast.tree.FromClause.addFromElement(FromClause.java:93)
org.hibernate.hql.internal.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:324)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElement(HqlSqlBaseWalker.java:3420)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromElementList(HqlSqlBaseWalker.java:3309)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.fromClause(HqlSqlBaseWalker.java:706)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.query(HqlSqlBaseWalker.java:562)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.selectStatement(HqlSqlBaseWalker.java:299)
org.hibernate.hql.internal.antlr.HqlSqlBaseWalker.statement(HqlSqlBaseWalker.java:247)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:250)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:185)
org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:138)
org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:105)
org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80)
org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:168)
org.hibernate.internal.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:222)
org.hibernate.internal.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:200)
org.hibernate.internal.SessionImpl.createQuery(SessionImpl.java:1703)
org.apache.jsp.StuGenInfo_005fStu_jsp._jspService(StuGenInfo_005fStu_jsp.java:203)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
note The full stack trace of the root cause is available in the Apache Tomcat/7.0.47 logs.
Apache Tomcat/7.0.47
在我的项目中，管理员输入学生的学术信息，学生获得了登录 ID，它是一个名为 Enrollment_Number 的主键。一旦学生登录，学生应该能够看到有关其学术的所有信息。
我正在尝试通过将注册保存到会话中（保存在登录页面中）并使用此注册（在 StuGenInfo_Stu.jsp 页面中检索注册）从 mysql 数据库中获取相应的记录来实现这一点。配置文件
<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD 3.0//EN"
"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd" >
<hibernate-configuration>
<session-factory>
<!-- Database connection settings -->
<property name="connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="connection.url">jdbc:mysql://localhost:3306/MBSIS</property>
<property name="connection.username">root</property>
<property name="connection.password">admin</property>
<!-- JDBC connection pool (use the built-in) -->
<property name="connection.pool_size">1</property>
<!-- SQL dialect -->
<property name="dialect">org.hibernate.dialect.MySQLDialect</property>
<!-- Enable Hibernate's automatic session context management -->
<property name="current_session_context_class">thread</property>
<!-- Disable the second-level cache -->
<property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>
<!-- Echo all executed SQL to stdout -->
<property name="show_sql">true</property>
<!-- Drop and re-create the database schema on startup -->
<property name="hbm2ddl.auto">update</property>
<mapping class="org.faculty.entity.RegistrationFaculty"/>
<mapping class="org.faculty.entity.StuAcadDetails"/>
</session-factory>
</hibernate-configuration>
StuAcad详情
@Table(name="ACADEMICS_DETAILS")
@Entity
public class StuAcadDetails
@Id
@Column(name="ENROLLMENT_NUMBER")
private String enroll;
@Column(name="SEMESTER")
private int semester;
@Column(name="BRANCH")
private String branch;
@Temporal(TemporalType.DATE)
@Column(name="DATE_OF_JOINING")
private Date doj;
@Column(name="ATTDCE_IN_THEORY")
private int attThry;
@Column(name="ATTDCE_IN_PRACTICAL")
private int attPrac;
@Column(name="PREVIOUS_SEM_PERCENTAGE")
private float preSemPer;
@Column(name="OVERALL_AGGREGATE")
private float overallAggr;
@Column(name="SESSIONAL_PERCENTAGE")
private float sessPer;
@Column(name="PERFORMANCE")
private String performance;
/*********************************************************************/
public String getEnroll()
return enroll;
public void setEnroll(String enroll)
this.enroll = enroll;
public int getSemester()
return semester;
public void setSemester(int semester)
this.semester = semester;
public String getBranch()
return branch;
public void setBranch(String branch)
this.branch = branch;
public Date getDoj()
return doj;
public void setDoj(Date doj)
this.doj = doj;
public int getAttThry()
return attThry;
public void setAttThry(int attThry)
this.attThry = attThry;
public int getAttPrac()
return attPrac;
public void setAttPrac(int attPrac)
this.attPrac = attPrac;
public float getPreSemPer()
return preSemPer;
public void setPreSemPer(float preSemPer)
this.preSemPer = preSemPer;
public float getOverallAggr()
return overallAggr;
public void setOverallAggr(float overallAggr)
this.overallAggr = overallAggr;
public float getSessPer()
return sessPer;
public void setSessPer(float sessPer)
this.sessPer = sessPer;
public String getPerformance()
return performance;
public void setPerformance(String performance)
this.performance = performance;
【问题讨论】：
@bellabax 是的..你想让我也分享那个代码吗？ 【参考方案1】：NU/A9/45055 是数字吗？或者应该是一个字符串？在此文本周围加上 ''，或者更好的是使用参数
Query query=sessionn.createQuery("from org.faculty.entity.StuAcadDetails where enroll=:enrollNo").setParameter("enrollNo",enroll).list()
PS：检查上面的编辑，ENROLLMENT_NUMBER 必须更改为enroll；和类名
也是完全合格的。
试试这个标准；相当于你的查询
List<StuAcadDetails> detail=(List<StuAcadDetails>) sessionn.createCriteria(StuAcadDetails.class)
.add(Restrictions.idEq(enroll))
.list()
【讨论】：
@bellabax-yes..它是一个字符串。我试过你说的，但堆栈跟踪仍然没有变化。 是StuAcadDetails 用@Entity 注释吗？
我已经编辑了我的问题并在上面添加了 StuAcadDetails 的代码..看看它。
错误已解决...但为什么它通过使用 Criteria API 而不是通过 HQL 查询工作？？
SessionFactoryHelper.requireClassPersister 查找名为StuAcadDetails 的实体，但实体的真实名称是org.faculty.entity.StuAcadDetails，所以你必须写完整的类名，而不仅仅是简单的名字！检查我的编辑，查询也应该有效！【参考方案2】：
您在查询中缺少别名
试试这个：
Query query=sessionn.createQuery("from StuAcadDetails sad where sad.ENROLLMENT_NUMBER="+enroll );
【讨论】：
@Shoaib-还是同样的问题..因为这里的变量登记是字符串类型..我的语法是正确的【参考方案3】：如果你仔细看看这里：StuAcadDetails 没有映射，我想它会很清楚。问题是 Hibernate 找不到 StuAcadDetails 实体。 Java 类和属性区分大小写。你必须检查这个。
而且，我认为这会有所不同，您应该删除以下行：
在 xml 页面中删除此 线程。
替换这一行：
<property name="current_session_context_class">org.hibernate.context.internal.ThreadLocalSessionContext</property>
【讨论】：
@jmail-我照你说的做了..但仍然面临同样的错误。 @Tushar2098，你检查我的第一个条件了吗。 是的，我也检查过..一切都很好。 StuAcadDetails 已正确映射并且拼写也正确。参考我上面提到的配置代码。以上是关于休眠错误-org.hibernate.hql.internal.ast.QuerySyntaxException的主要内容，如果未能解决你的问题，请参考以下文章