我在执行代码后使用myeclipse,我得到了下面的异常
log4j:WARN No appenders could be found for logger
(org.hibernate.cfg.Environment).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" org.hibernate.MappingException: Unknown entity:info.inetsolv.Emp
at org.hibernate.impl.SessionF
下面是我的类层次结构(为简洁起见,省略了lombok生成的构造函数/getters/setter):
public class A
{
... other variables ...
@OneToMany(fetch=FetchType.LAZY, cascade = {CascadeType.ALL})
private Set<B> bSet = new HashSet<B>();
}
public class B
{
... other variables ...
@CollectionOfElements
@I
我有一个现有的具有标准项目布局的Gradle项目:
src/main/java和src/test/java用于我的代码。我编写了下面的测试,以确认j编译程序正在我的项目中工作。
import com.googlecode.totallylazy.annotations.tailrec;
import org.junit.Test;
public class TailRecursionTest {
@tailrec
public static int safeRecursiveAdd(int iterations,int accumulator) {
if(itera
我使用Spring服务器和JPA来保存变量。
我在努力拯救:
@ElementCollection(fetch=FetchType.EAGER)
List<List<String>> Listarespostas = new ArrayList<List<String>>();
但显然出现了一个错误:
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with nam
我正在尝试执行JPA/Hibernate映射来映射两个表,但是得到了这个错误。任何帮助都将不胜感激!!
Restaurants.java
@Entity
@Table(name="RESTAURANTS")
public class Restaurants{
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
@OneToMany(mappedBy="restaurant")
private LinkedList<Menus>
我必须将Hashset转换为TreeSet,但我有错误
// Here, All is ok, Chien is an object.
Set<Chien> animaux = new HashSet<Chien>();
animaux.add(new Chien("non", 10));
animaux.add(new Chien("zoz", 15));
animaux.add(new Chien("non", 10));
// And then i have to convert it to TreeSet
//
当我试图将数据放入缓存时,Apache点燃器会抛出异常以下,
Caused by: class org.apache.ignite.IgniteCheckedException: Failed to deserialize object with given class loader: [clsLdr=org.apache.ignite.internal.processors.cache.GridCacheDeploymentManager$CacheClassLoader@5d5b5fa7, err=Failed to deserialize object [typeName=java.ut