PropertyNotFoundException：无法找到setter [英] PropertyNotFoundException: Could not find a setter

问题描述

假设我有这样的实体：

  public class Foo {
 
 private long id; 
私人列表< Bar> list = new ArrayList<>（）; 
 
 public long getId（）{
 return id; 
} 
 
 public void setId（long id）{
 this.id = id; 
} 
 
公开列表< Bar> getList（）{
 return list; 
 
 
 public void setList（List< Bar> list）{
 this.list = list; 
} 
 
 / **帮助程序方法* / 
 public boolean isEmpty（）{
 return list.isEmpty（）; 
 
 
 $ / code $ / pre 
 
&相应的实体映射：
 
 
 <？xml version =1.0encoding =UTF-8？> 
< entity-mappings xmlns =http://xmlns.jcp.org/xml/ns/persistence/orm
 xmlns：xsi =http://www.w3.org/2001 / XMLSchema-instance
 xsi：schemaLocation =http://xmlns.jcp.org/xml/ns/persistence/orm
 version =2.1> 
 
< entity class =Foo> 
< table name =foo/> 
<属性> 
< id name =id/> 
<一对多名称=列表> 
<！ -  ...  - > 
< /一对多> 
<临时名称=isEmpty/> 
< / attributes> 
< / entity> 
 
< / entity-mappings> 
  
和这个例外，我得到了： org.hibernate.PropertyNotFoundException：找不到为属性setter方法[富＃空] 结果，
我发现了类似的交 -   Hibernate映射异常：PropertyNotFoundException：无法找到这种方法的制定者并有北阳注释帮助。 
解决方案
 
通过指定<暂态名称= 的isEmpty/> 您尝试向JPA提供程序发出信号，表明您有一个名为 isEmpty 的临时属性。您的财产实际上被命名为空，而不是 isEmpty ，并且错误消息也表明也是（ FOO＃空）。将相应的XML标记替换为< transient name =empty/> 。
 
Suppose I have such entity:
public class Foo {

  private long id;
  private List<Bar> list = new ArrayList<>();

  public long getId() {
     return id;
  }

  public void setId(long id) {
     this.id = id;
  }

  public List<Bar> getList() {
     return list;
  }

  public void setList(List<Bar> list) {
     this.list = list;
  }

  /** helper method*/
  public boolean isEmpty(){
     return list.isEmpty();
  }
}
And corresponding entity mapping:
 <?xml version="1.0" encoding="UTF-8" ?>
<entity-mappings xmlns="http://xmlns.jcp.org/xml/ns/persistence/orm"
                     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence/orm"
                     version="2.1">

    <entity class="Foo">
     <table name="foo"/>
     <attributes>
       <id name="id"/>
        <one-to-many name="list">
          <!-- ... -->
        </one-to-many>
        <transient name="isEmpty"/>
     </attributes>
    </entity>

</entity-mappings>
And this exception I got:org.hibernate.PropertyNotFoundException: Could not locate setter method for property [Foo#empty]

I found a similar post - HIbernate Mapping Exception: PropertyNotFoundException: Could not find a setter and there Trainsient annotation on such method helped.  
解决方案
By specifying <transient name="isEmpty"/> you try to signal to the JPA provider that you have a transient property named isEmpty. Your property is actually named empty, not isEmpty, and the error message indicates that too (Foo#empty). Replace the corresponding XML tag with <transient name="empty"/>.

                        
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