我有两个DAO Hibernate映射类。关系是一对多的双向关系。当我尝试添加新设置时，出现以下错误。
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 'key, updated_by, updated_time, appType_id) values ('Mxxd', '2015-12-17 11:09:' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:400)
at com.mysql.jdbc.Util.getInstance(Util.java:383)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1901)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2113)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2049)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2034)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:147)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:492)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:197)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:181)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:216)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:334)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:702)
at com.ips.tvadmindao.services.TvAppTypeService.addAppType(TvAppTypeService.java:53)
at com.xxx.tvadmindao.services.Application.main(Application.java:50)
2015-12-17 11:09:37 WARN SqlExceptionHelper:144 - SQL Error: 1064, SQLState: 42000
2015-12-17 11:09:37 ERROR SqlExceptionHelper:146 - 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 'key, updated_by, updated_time, appType_id) values ('Kalla', '2015-12-17 11:09:' at line 1
Exception in thread "main" org.hibernate.exception.SQLGrammarException: could not execute statement
at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:80)
at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126)
at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:211)
at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96)
at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032)
at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558)
at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98)
at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:492)
at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:197)
at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:181)
at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:216)
at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:334)
at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)
at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:195)
at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:126)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:209)
at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:55)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:194)
at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:49)
at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90)
at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:715)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:707)
at org.hibernate.internal.SessionImpl.save(SessionImpl.java:702)
at com.xxx.tvadmindao.services.TvAppTypeService.addAppType(TvAppTypeService.java:53)
at com.xxx.tvadmindao.services.Application.main(Application.java:50)
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 'key, updated_by, updated_time, appType_id) values ('MenukaD', '2015-12-17 11:09:' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:400)
at com.mysql.jdbc.Util.getInstance(Util.java:383)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545)
at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1901)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2113)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2049)
at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2034)
at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeUpdate(NewProxyPreparedStatement.java:147)
at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208)
... 23 more
这里我添加了用于添加settingstypes的方法。
public boolean addAppType() {
//boolean success = false;
// add app and setting together
String appType_name = "AAAA";
String created_by = "Mxxxd";
TvAppsType_Settings setting = new TvAppsType_Settings();
setting.setCreated_by(created_by);
setting.setCreated_time(new LocalDateTime());
setting.setKey("Host2");
setting.setUpdated_by(created_by);
setting.setUpdated_time(new LocalDateTime());
TvAppsType apptype2 = (TvAppsType)session.get(TvAppsType.class, 4);
setting.setApptypes(apptype2);
session.save(setting);
if (!HibernateUtil.INSTANCE.commitTransaction())
return false;
logger.info("Exited : " + "addAppType(String appType_name, String created_by)");
return true;
}
也有DAO课程。
@Entity
@Table(name = "tvapps_type_settings")
public class TvAppsType_Settings {
@Id //primary key
@GeneratedValue(strategy = GenerationType.IDENTITY)//strategy for generating auto generated number
@Column(name = "settingType_id", nullable = false)
private int settingType_id;
/*@Column(name = "appType_id", insertable=false , updatable=false)
private int appType_id;*/
@ManyToOne(cascade= CascadeType.ALL)
@JoinColumn(name= "appType_id",insertable=false, updatable=false)
private TvAppsType apptypes;
@Column(name = "key")
private String key;
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDateTime")
@Column(name = "created_time", nullable = false)
private LocalDateTime created_time;
@Column(name = "created_by", nullable = false)
private String created_by;
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDateTime")
@Column(name = "updated_time", nullable = false)
private LocalDateTime updated_time;
@Column(name = "updated_by", nullable = false)
private String updated_by;
public TvAppsType getApptypes() {
return apptypes;
}
public void setApptypes(TvAppsType apptypes) {
this.apptypes = apptypes;
}
public int getSettingType_id() {
return settingType_id;
}
public void setSettingType_id(int settingType_id) {
this.settingType_id = settingType_id;
}
public String getKey() {
return key;
}
public void setKey(String key) {
this.key = key;
}
public LocalDateTime getCreated_time() {
return created_time;
}
public void setCreated_time(LocalDateTime created_time) {
this.created_time = created_time;
}
public String getCreated_by() {
return created_by;
}
public void setCreated_by(String created_by) {
this.created_by = created_by;
}
public LocalDateTime getUpdated_time() {
return updated_time;
}
public void setUpdated_time(LocalDateTime updated_time) {
this.updated_time = updated_time;
}
public String getUpdated_by() {
return updated_by;
}
public void setUpdated_by(String updated_by) {
this.updated_by = updated_by;
}
}
TvAppsType DAO类。
@Entity
@Table(name = "tvapps_type")
public class TvAppsType {
@Id //primary key
@GeneratedValue(strategy = GenerationType.IDENTITY)//strategy for generating auto generated number
@Column(name = "appType_id", nullable = false)
private int appType_id;
@Column(name = "appType_name", nullable = false)
private String appType_name;
@OneToMany(cascade = CascadeType.ALL)
@JoinColumn(name = "appType_id",nullable = false)
private List<TvAppsType_Settings> tvsettings = new ArrayList<TvAppsType_Settings>();
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDateTime")
@Column(name = "created_time", nullable = false)
private LocalDateTime created_time;
@Column(name = "created_by", nullable = false)
private String created_by;
@Type(type = "org.jadira.usertype.dateandtime.joda.PersistentLocalDateTime")
@Column(name = "updated_time", nullable = false)
private LocalDateTime updated_time;
@Column(name = "updated_by", nullable = false)
private String updated_by;
public List<TvAppsType_Settings> getTvsettings() {
return tvsettings;
}
public void setTvsettings(List<TvAppsType_Settings> tvsettings) {
this.tvsettings = tvsettings;
}
public int getAppType_id() {
return appType_id;
}
public void setAppType_id(int appType_id) {
this.appType_id = appType_id;
}
public String getAppType_name() {
return appType_name;
}
public void setAppType_name(String appType_name) {
this.appType_name = appType_name;
}
public LocalDateTime getCreated_time() {
return created_time;
}
public void setCreated_time(LocalDateTime created_time) {
this.created_time = created_time;
}
public String getCreated_by() {
return created_by;
}
public void setCreated_by(String created_by) {
this.created_by = created_by;
}
public LocalDateTime getUpdated_time() {
return updated_time;
}
public void setUpdated_time(LocalDateTime updated_time) {
this.updated_time = updated_time;
}
public String getUpdated_by() {
return updated_by;
}
public void setUpdated_by(String updated_by) {
this.updated_by = updated_by;
}
}
你能帮我解决这个错误吗？
答案 0 :(得分：1)
您的MySQL服务器不喜欢字段名key，并且您的持久性提供程序无法正确处理。一种选择是将字段key重命名为其他内容，如果可能的话。
可替换地，
@Column(name="`key`")
应该有用。
答案 1 :(得分：1)
key是MySQL中的保留关键字。 Hibernate没有考虑它，并将您的列名按原样粘贴到查询中，因此错误。
有两种方法可以修复它。更明智的做法是将列重命名为其他内容，例如setting_key或类似内容。
如果你不能重命名它，那就是一个hacky解决方案：
@Column(name = "`key`")
private String key;
请注意，列的名称现在是反引号，并且由于hibernate只是将其粘贴到查询中，因此它将被MySQL解释为key