關於hibernate4.3.8final版本(annotation)註解問題 相當的bug啊 求大神指點迷津,hibernateannotation
在hibernate官方文檔中給出了 如下註解方式:
5.1. Mapping declaration
Object/relational mappings can be defined in three approaches:
using Java 5 annotations (via the Java Persistence 2 annotations)
using JPA 2 XML deployment descriptors (described in chapter XXX)
using the Hibernate legacy XML files approach known as hbm.xml
Annotations are split in two categories, the logical mapping annotations (describing the object model, the association between two entities etc.) and the physical mapping annotations (describing the physical schema, tables, columns, indexes, etc). We will mix annotations from both categories in the following code examples.
JPA annotations are in the javax.persistence.* package. Hibernate specific extensions are inorg.hibernate.annotations.*. You favorite IDE can auto-complete annotations and their attributes for you (even without a specific "JPA" plugin, since JPA annotations are plain Java 5 annotations).
Here is an example of mapping
package eg;@Entity @Table(name="cats") @Inheritance(strategy=SINGLE_TABLE)@DiscriminatorValue("C") @DiscriminatorColumn(name="subclass", discriminatorType=CHAR)public class Cat { @Id @GeneratedValue public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } private Integer id; public BigDecimal getWeight() { return weight; } public void setWeight(BigDecimal weight) { this.weight = weight; } private BigDecimal weight; @Temporal(DATE) @NotNull @Column(updatable=false) public Date getBirthdate() { return birthdate; } public void setBirthdate(Date birthdate) { this.birthdate = birthdate; } private Date birthdate; @org.hibernate.annotations.Type(type="eg.types.ColorUserType") @NotNull @Column(updatable=false) public ColorType getColor() { return color; } public void setColor(ColorType color) { this.color = color; } private ColorType color; @NotNull @Column(updatable=false) public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } private String sex; @NotNull @Column(updatable=false) public Integer getLitterId() { return litterId; } public void setLitterId(Integer litterId) { this.litterId = litterId; } private Integer litterId; @ManyToOne @JoinColumn(name="mother_id", updatable=false) public Cat getMother() { return mother; } public void setMother(Cat mother) { this.mother = mother; } private Cat mother; @OneToMany(mappedBy="mother") @OrderBy("litterId") public Set<Cat> getKittens() { return kittens; } public void setKittens(Set<Cat> kittens) { this.kittens = kittens; } private Set<Cat> kittens = new HashSet<Cat>();}@Entity @DiscriminatorValue("D")public class DomesticCat extends Cat { public String getName() { return name; } public void setName(String name) { this.name = name } private String name;}
自己寫出的的註解代碼:
package org.hibernate.annotation.entity;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity(name="_teacher")
public class Teacher {
private Integer id;
private String name;
private String title;
@Id
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
差別 如果是@Entity(name="_teacher")這樣去註解當database中的table與實體類名不一直的時候這樣是可以通過的
而當你在hibernate4.3.8版本也就是4.0以後的版本中,你按照hibernate官方文檔去註解
package org.hibernate.annotation.entity;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@(table="_teacher")
public class Teacher {
private Integer id;
private String name;
private String title;
@Id
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
}
此刻是編譯通過了而在運行時卻通過不了 一直拋以下異常:
java.lang.ExceptionInInitializerError
at org.hibernate.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:26)
at org.hibernate.util.HibernateUtil.<clinit>(HibernateUtil.java:10)
at org.hibernate.test.HibernateTest.test2(HibernateTest.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:69)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:48)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:292)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.lang.NoSuchMethodError: javax.persistence.Table.indexes()[Ljavax/persistence/Index;
at org.hibernate.cfg.annotations.EntityBinder.processComplementaryTableDefinitions(EntityBinder.java:973)
at org.hibernate.cfg.AnnotationBinder.bindClass(AnnotationBinder.java:824)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processAnnotatedClassesQueue(Configuration.java:3845)
at org.hibernate.cfg.Configuration$MetadataSourceQueue.processMetadata(Configuration.java:3799)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1412)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1846)
at org.hibernate.util.HibernateUtil.buildSessionFactory(HibernateUtil.java:23)
... 25 more
--樓主雖然已經解決此問題,但是針對hibernate註解,官方文檔給出的不能使用,一直不太明白,還請大神指點,共同探討