Java Hibernate使用普通POJO
用于与表映射的持久对象。映射类应该是POJO,具有普通旧Java对象的所有规则。它的setter和getter不应该有任何其他初始化对象的代码Java Hibernate使用普通POJO,java,hibernate,javabeans,pojo,Java,Hibernate,Javabeans,Pojo,用于与表映射的持久对象。映射类应该是POJO,具有普通旧Java对象的所有规则。它的setter和getter不应该有任何其他初始化对象的代码 public class Cat { String id; String name; Type type; /** * @return the id */ public String getId() {
public class Cat {
String id;
String name;
Type type;
/**
* @return the id
*/
public String getId() {
return id;
}
/**
* @param id the id to set
*/
public void setId(String id) {
if(id != null) {
type = new Type(); //This will cause in exception org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update
//ERROR 2017-03-07 00:37:30,253 [tomcat-http--22] - ERROR: cannot execute UPDATE in a read-only transaction
}
this.id = id;
}
/**
* @return the name
*/
public String getName() {
return name;
}
/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}
例外情况是:-
WARN 2017-03-07 00:37:30,253 [tomcat-http--22] - SQL Error: 0, SQLState: 25006
ERROR 2017-03-07 00:37:30,253 [tomcat-http--22] - ERROR: cannot execute UPDATE in a read-only transaction
ERROR 2017-03-07 00:37:30,254 [tomcat-http--22] - Could not synchronize database state with session
org.hibernate.exception.GenericJDBCException: Could not execute JDBC batch update
at org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:253)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:266)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:168)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
为什么hibernate只期望有严格规则的POJO?hibernate对此有什么指导方针吗
如果我从方法setId中删除代码,只保留I'd的赋值,它就可以工作。看起来您在某个地方将方法标记为@Transactional(readonly=true)这正好说明Hibernate有时是多么愚蠢和不灵活。(异常消息没有任何意义)您能提供您的代码示例吗?它是一个简单的pojo类。我没有使用任何注释。在映射文件中,没有任何内容是只读的