Question

我有

public class CustomerA {

  private String street;

  public CustomerA() {
  }

  //get and set methods
}



public class CustomerB {

  private IAddress address;

  public CustomerB() {
  }

  //get and set methods
}

public class Address implements IAddress{

  private String street;

  public Address () {
  }

  //get and set methods
}

我想使用dozer

将CustomerA映射到CustomerB

我的映射文件

<mapping>
    <class-a>CustomerA</class-a>
    <class-b bean-factory="CustomerBBeanFactory">CustomerB</class-b>
    <field>
        <a>street</a>
        <b >address.street</b>
    </field>
</mapping>

在CustomerBBeanFactory中，我返回一个CustomerB对象并将地址设置为新的Address（）。不使用工厂意味着CustomerB无法从接口实例化地址类。

但是当我调用map方法

时，我会得到以下内容

java.lang.NullPointerException
at org.dozer.util.ReflectionUtils.invoke(ReflectionUtils.java:323)
at org.dozer.propertydescriptor.GetterSetterPropertyDescriptor.writeDeepDestinationValue(GetterSetterPropertyDescriptor.java:259)
at org.dozer.propertydescriptor.GetterSetterPropertyDescriptor.setPropertyValue(GetterSetterPropertyDescriptor.java:87)
at org.dozer.fieldmap.FieldMap.writeDestValue(FieldMap.java:94)
at org.dozer.MappingProcessor.writeDestinationValue(MappingProcessor.java:895)
at org.dozer.MappingProcessor.mapFromFieldMap(MappingProcessor.java:349)

任何想法如何解决？

Answer 1

看起来像set方法做了伎俩

<mapping>
    <class-a>org.apache.camel.converter.dozer.service.Customer</class-a>
    <class-b bean-factory="org.apache.camel.converter.dozer.model.CustomerBeanFactory">org.apache.camel.converter.dozer.model.Customer
    </class-b>
    <field>
        <a>street</a>
        <b set-method="setStreet">address.street</b>
    </field>
</mapping>

具有writeDeepDestinationValue接口的Dozer NullPointer

1 个答案: