问未能将“java.lang.Integer”类型的属性值转换为所需类型
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提问于 2019-04-25 17:51:07

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我正在设置多个关系，我的联接表JoinTable有一个带有两个键的复合Pk，问题是当我试图持久化我的实体hibernate时，他总是说他不能将java.lang.Long转换成所需的类型(User或Weeks)

我尝试将属性更改为java原语(分别为long和int )，但hibernate无法将此值设置为目标类型(对象)。

我把这种关系描绘成这样：

User.java

@Column(name="id", nullable=false)  
@Id 
@GeneratedValue(generator="USER_ID_GENERATOR")  
@org.hibernate.annotations.GenericGenerator(name="USER_ID_GENERATOR", strategy="native")    
private long id;

@OneToMany(mappedBy="user", targetEntity=com.ti.project.Model.JoinTable.class)  @org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.LOCK}) 
@org.hibernate.annotations.LazyCollection(org.hibernate.annotations.LazyCollectionOption.TRUE)  
private java.util.Set jointable = new java.util.HashSet();

Weeks.java

@Column(name="week_id", nullable=false) 
@Id 
@GeneratedValue(generator="WEEK_ID_GENERATOR")  
@org.hibernate.annotations.GenericGenerator(name="WEEK_ID_GENERATOR", strategy="native")    
private int week_id;

@OneToMany(mappedBy="week",targetEntity=com.ti.project.Model.JoinTable.class)   
@org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.SAVE_UPDATE, org.hibernate.annotations.CascadeType.LOCK}) 
@org.hibernate.annotations.LazyCollection(org.hibernate.annotations.LazyCollectionOption.TRUE)  
private java.util.Set jointable = new java.util.HashSet();

JoinTable.java

@PrimaryKeyJoinColumn       
@ManyToOne(targetEntity=com.ti.project.Model.User.class, fetch=FetchType.LAZY)  
@org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.LOCK})    
@JoinColumns(value={ @JoinColumn(name="user_id", referencedColumnName="id", nullable=false) }, foreignKey=@ForeignKey(name="FKuser_su465470"))  
private com.ti.project.Model.User user;

@Column(name="user_id", nullable=false, insertable=false, updatable=false)  
@Id     
@org.hibernate.annotations.GenericGenerator(name="USERID_GENERATOR", strategy="foreign", parameters=@org.hibernate.annotations.Parameter(name="property", value="user"))    
private long userId;

@PrimaryKeyJoinColumn   
@ManyToOne(targetEntity=com.ti.project.Model.Weeks.class, fetch=FetchType.LAZY) 
@org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.LOCK})    
@JoinColumns(value={ @JoinColumn(name="week_id", referencedColumnName="week_id", nullable=false) }, foreignKey=@ForeignKey(name="FKweek_su338979")) 
private com.ti.project.Model.Weeks week;

@Column(name="week_id", nullable=false, insertable=false, updatable=false)  
@Id 
@GeneratedValue(generator="WEEKID_GENERATOR")   
@org.hibernate.annotations.GenericGenerator(name="WEEKID_GENERATOR", strategy="foreign", parameters=@org.hibernate.annotations.Parameter(name="property", value="week"))    
private int weekId;

JoinTablePK.java

@ManyToOne(targetEntity=com.ti.project.Model.User.class, fetch=FetchType.LAZY)  
@org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.LOCK})    
@JoinColumns(value={ @JoinColumn(name="user_id", referencedColumnName="id", nullable=false) }, foreignKey=@ForeignKey(name="FKuser_su465470"))  
private com.ti.project.Model.User user;

@ManyToOne(targetEntity=com.ti.project.Model.Weeks.class, fetch=FetchType.LAZY) 
@org.hibernate.annotations.Cascade({org.hibernate.annotations.CascadeType.LOCK})    
@JoinColumns(value={ @JoinColumn(name="week_id", referencedColumnName="week_id", nullable=false) }, foreignKey=@ForeignKey(name="FKweek_su338979")) 
private com.ti.project.Model.Weeks week;

这是生成的异常：

Failed to convert property value of type 'java.lang.Integer' to required type 'com.ti.project.Model.Weeks' for property 'week'; nested exception is java.lang.IllegalStateException: Cannot convert value of type 'java.lang.Integer' to required type 'com.ti.project.Model.Weeks' for property 'week': no matching editors or conversion strategy found

我希望持久化这个JoinTable实体，但是这个异常让我疯狂了吗？

hibernate