无法使用 MySQL 在 Hibernate 中执行查询

Question

DAO

public class TtmpHome {
private static final Log log = LogFactory.getLog(TtmpHome.class);
// Contexte de persistance
private EntityManagerFactory emf = PersistenceManager.getInstance().getEntityManagerFactory();
private EntityManager entityManager = emf.createEntityManager();

//staff

public Ttmp findByStationName(Integer stNumber) {
    String queryS = "select t from Ttmp t where t.stationNumber =?1";
    Ttmp t = null;
    try {
        Query query = entityManager.createQuery(queryS);
        query.setParameter(1, stNumber);
        List eqList = query.getResultList();
        if (eqList != null && eqList.size() > 0)
            t = (Ttmp) eqList.get(0);
        log.debug("get successful");
        return t;
    } catch (RuntimeException re) {
        log.error("get failed", re);
    }
}
}

实体

@Entity
@Table(name = "ttmp", catalog = "semap")
public class Ttmp implements java.io.Serializable {

    private int id;
    private String requestNumber;
    private String requestFrom;
    private Date requestDate;
    private Integer stationNumber;
    private String site;
    private String region;
    private String requestReceiver;
    private String descIssue;
    private String thirdParty;
    private String descResolutionAction;
    private String closerType;
    private Integer closeNum;
    private Date dateAction;
    private String agentAction;
    private String validation;
    private String comment;

    public Ttmp() {
    }

    public Ttmp(int id) {
        this.id = id;
    }

    public Ttmp(int id, String requestNumber, String requestFrom,
            Date requestDate, Integer stationNumber, String site,
            String region, String requestReceiver, String descIssue,
            String thirdParty, String descResolutionAction, String closerType,
            Integer closeNum, Date dateAction, String agentAction,
            String validation, String comment) {
        this.id = id;
        this.requestNumber = requestNumber;
        this.requestFrom = requestFrom;
        this.requestDate = requestDate;
        this.stationNumber = stationNumber;
        this.site = site;
        this.region = region;
        this.requestReceiver = requestReceiver;
        this.descIssue = descIssue;
        this.thirdParty = thirdParty;
        this.descResolutionAction = descResolutionAction;
        this.closerType = closerType;
        this.closeNum = closeNum;
        this.dateAction = dateAction;
        this.agentAction = agentAction;
        this.validation = validation;
        this.comment = comment;
    }

    @Id
    @Column(name = "id", unique = true, nullable = false)
    public int getId() {
        return this.id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Column(name = "request_number")
    public String getRequestNumber() {
        return this.requestNumber;
    }

    public void setRequestNumber(String requestNumber) {
        this.requestNumber = requestNumber;
    }

    @Column(name = "request_from")
    public String getRequestFrom() {
        return this.requestFrom;
    }

    public void setRequestFrom(String requestFrom) {
        this.requestFrom = requestFrom;
    }

    @Temporal(TemporalType.DATE)
    @Column(name = "request_date", length = 0)
    public Date getRequestDate() {
        return this.requestDate;
    }

    public void setRequestDate(Date requestDate) {
        this.requestDate = requestDate;
    }

    @Column(name = "station_number")
    public Integer getStationNumber() {
        return this.stationNumber;
    }

    public void setStationNumber(Integer stationNumber) {
        this.stationNumber = stationNumber;
    }

    @Column(name = "site")
    public String getSite() {
        return this.site;
    }

    public void setSite(String site) {
        this.site = site;
    }

    @Column(name = "region")
    public String getRegion() {
        return this.region;
    }

    public void setRegion(String region) {
        this.region = region;
    }

    @Column(name = "request _receiver")
    public String getRequestReceiver() {
        return this.requestReceiver;
    }

    public void setRequestReceiver(String requestReceiver) {
        this.requestReceiver = requestReceiver;
    }

    @Column(name = "desc_issue", length = 500)
    public String getDescIssue() {
        return this.descIssue;
    }

    public void setDescIssue(String descIssue) {
        this.descIssue = descIssue;
    }

    @Column(name = "third_party")
    public String getThirdParty() {
        return this.thirdParty;
    }

    public void setThirdParty(String thirdParty) {
        this.thirdParty = thirdParty;
    }

    @Column(name = "desc_resolution_action", length = 500)
    public String getDescResolutionAction() {
        return this.descResolutionAction;
    }

    public void setDescResolutionAction(String descResolutionAction) {
        this.descResolutionAction = descResolutionAction;
    }

    @Column(name = "closer_type")
    public String getCloserType() {
        return this.closerType;
    }

    public void setCloserType(String closerType) {
        this.closerType = closerType;
    }

    @Column(name = "close_num")
    public Integer getCloseNum() {
        return this.closeNum;
    }

    public void setCloseNum(Integer closeNum) {
        this.closeNum = closeNum;
    }

    @Temporal(TemporalType.DATE)
    @Column(name = "date_action", length = 0)
    public Date getDateAction() {
        return this.dateAction;
    }

    public void setDateAction(Date dateAction) {
        this.dateAction = dateAction;
    }

    @Column(name = "agent_action")
    public String getAgentAction() {
        return this.agentAction;
    }

    public void setAgentAction(String agentAction) {
        this.agentAction = agentAction;
    }

    @Column(name = "validation")
    public String getValidation() {
        return this.validation;
    }

    public void setValidation(String validation) {
        this.validation = validation;
    }

    @Column(name = "comment", length = 500)
    public String getComment() {
        return this.comment;
    }

    public void setComment(String comment) {
        this.comment = comment;
    }
}

当我试图在我的代码的某些部分中获取数据时，我得到了那个错误：

Exception in thread "AWT-EventQueue-0" javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not execute query
    at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:630)
    at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:75)
    at sau.se.migration.dao.TtmpHome.findByStationName(TtmpHome.java:87)
    at sau.se.editor.dialog.StationInfo.createIncidentsTable(StationInfo.java:110)
    at sau.se.editor.dialog.StationInfo.<init>(StationInfo.java:750)
    at sau.se.editor.dialog.StationInfoAction.actionPerformed(StationInfoAction.java:19)
    at sau.se.editor.BasicGraphEditor$14.actionPerformed(BasicGraphEditor.java:1074)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.AbstractButton.doClick(Unknown Source)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$400(Unknown Source)
    at java.awt.EventQueue$2.run(Unknown Source)
    at java.awt.EventQueue$2.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: org.hibernate.exception.SQLGrammarException: could not execute query
    at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:90)
    at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
    at org.hibernate.loader.Loader.doList(Loader.java:2231)
    at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125)
    at org.hibernate.loader.Loader.list(Loader.java:2120)
    at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401)
    at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361)
    at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196)
    at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148)
    at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102)
    at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:66)
    ... 43 more
Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'as request13_21_, ttmp0_.site as site21_, ttmp0_.station_number as station15_21_' at line 1
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    at com.mysql.jdbc.Util.getInstance(Util.java:381)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1031)
    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376)
    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308)
    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837)
    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961)
    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2543)
    at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1737)
    at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1888)
    at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)
    at org.hibernate.loader.Loader.getResultSet(Loader.java:1808)
    at org.hibernate.loader.Loader.doQuery(Loader.java:697)
    at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)
    at org.hibernate.loader.Loader.doList(Loader.java:2228)
    ... 51 more

我曾经在其他实体中遵循相同的程序，但这是我第一次遇到这个问题。

更新 使用 SpringLearner 提出的解决方案时：

com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'as request13_21_, ttmp0_.site as site21_, ttmp0_.station_number as station15_21_' at line 1 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:406) at com.mysql.jdbc.Util.getInstance(Util.java:381) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1031) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:957) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3376) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3308) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1837) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1961) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2543) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1737) at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1888) at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208) at org.hibernate.loader.Loader.getResultSet(Loader.java:1808) at org.hibernate.loader.Loader.doQuery(Loader.java:697) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259) at org.hibernate.loader.Loader.doList(Loader.java:2228) at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2125) at org.hibernate.loader.Loader.list(Loader.java:2120) at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:401) at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:361) at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:196) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1148) at org.hibernate.impl.QueryImpl.list(QueryImpl.java:102) at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:66) at sau.se.migration.dao.TtmpHome.findByStationName(TtmpHome.java:87) at sau.se.editor.dialog.StationInfo.createIncidentsTable(StationInfo.java:110) at sau.se.editor.dialog.StationInfo.<init>(StationInfo.java:750) at sau.se.editor.dialog.StationInfoAction.actionPerformed(StationInfoAction.java:19) at sau.se.editor.BasicGraphEditor$14.actionPerformed(BasicGraphEditor.java:1074) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.AbstractButton.doClick(Unknown Source) at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source) at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$400(Unknown Source) at java.awt.EventQueue$2.run(Unknown Source) at java.awt.EventQueue$2.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.AccessControlContext$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) 14:42:38.680 [AWT-EventQueue-0] WARN o.h.util.JDBCExceptionReporter - SQL Error: 1064, SQLState: 42000 14:42:38.680 [AWT-EventQueue-0] ERROR o.h.util.JDBCExceptionReporter - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'as request13_21_, ttmp0_.site as site21_, ttmp0_.station_number as station15_21_' at line 1 14:42:38.681 [AWT-EventQueue-0] DEBUG org.hibernate.jdbc.ConnectionManager - aggressively releasing JDBC connection

Answer 1

更改String queryS = "select t from Ttmp t where t.stationNumber =?1"; 给String queryS = "select t from Ttmp t where t.stationNumber =:stnumber ";

和

query.setParameter(1, stNumber);

致query.setParameter("stnumber", stNumber);

Answer 2

我想一定是（不带数字的问号）：

"select t from Ttmp t where t.stationNumber =?";