java - org.hibernate.InstantiationException : No default constructor for entity: : principal. 客户端

Question

我遇到了这个错误:

Exception in thread "main" org.hibernate.InstantiationException: No default constructor for entity:  : principal.Cliente
   at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:120)
   at org.hibernate.tuple.PojoInstantiator.instantiate(PojoInstantiator.java:136)
   at org.hibernate.tuple.entity.AbstractEntityTuplizer.instantiate(AbstractEntityTuplizer.java:737)
   at org.hibernate.persister.entity.AbstractEntityPersister.instantiate(AbstractEntityPersister.java:4755)
   at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1387)
   at org.hibernate.internal.SessionImpl.instantiate(SessionImpl.java:1375)
   at org.hibernate.loader.plan.exec.process.internal.EntityReferenceInitializerImpl.hydrateEntityState(EntityReferenceInitializerImpl.java:235)
   at org.hibernate.loader.plan.exec.process.internal.AbstractRowReader.readRow(AbstractRowReader.java:107)
   at org.hibernate.loader.plan.exec.internal.EntityLoadQueryDetails$EntityLoaderRowReader.readRow(EntityLoadQueryDetails.java:255)
   at org.hibernate.loader.plan.exec.process.internal.ResultSetProcessorImpl.extractResults(ResultSetProcessorImpl.java:129)
   at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:138)
   at org.hibernate.loader.plan.exec.internal.AbstractLoadPlanBasedLoader.executeLoad(AbstractLoadPlanBasedLoader.java:102)
   at org.hibernate.loader.entity.plan.AbstractLoadPlanBasedEntityLoader.load(AbstractLoadPlanBasedEntityLoader.java:186)
   at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:4120)
   at org.hibernate.event.internal.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:502)
   at org.hibernate.event.internal.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:467)
   at org.hibernate.event.internal.DefaultLoadEventListener.load(DefaultLoadEventListener.java:212)
   at org.hibernate.event.internal.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:274)
   at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:150)
   at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1066)
   at org.hibernate.internal.SessionImpl.access$2000(SessionImpl.java:176)
   at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.load(SessionImpl.java:2540)
   at org.hibernate.internal.SessionImpl.get(SessionImpl.java:951)
   at principal.ClienteDAO.obtenContacto(ClienteDAO.java:83)
   at principal.Main.main(Main.java:43)

不知道为什么我得到那个异常

EDIT1这里是principal.Cliente

public class Cliente {
    private String name;

    public Cliente(String name) {
        this.name= name;
    }
}

编辑 2删除了一堆无用的代码，让它看起来更干净

Answer 1

principal.Cliente 中缺少默认构造函数，我可以说，

public class Cliente{ 
  public Cliente(){}
}