我正在尝试在 Map 中获取以下实体的属性:
@Entity
@Table(name = "ps_parameter")
@NamedQueries({Named Queries Here..})
public class PSParameter
implements Serializable
{
//~ Static variables/initializers ----------------------------------------------------
....
//~ Instance variables ---------------------------------------------------------------
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "id", nullable = false)
private Integer id;
@Column(name = "name", nullable = false)
private String name;
@Column(name = "paramValue", nullable = false)
private String paramValue;
//~ Constructors ---------------------------------------------------------------------
....
//~ Methods --------------------------------------------------------------------------
public Double getDoubleValue()
{
return Double.parseDouble(getParamValue());
}
public Integer getIntegerValue()
{
return Integer.parseInt(getParamValue());
}
....
}
通过以下方式:
....
try
{
Map propertiesCurrentObject = BeanUtils.describe(currentObject);
....
}
....
显然currentObject
是一个PSParameter ..
每当describe
调用该函数时,我都会得到InvocationTargetException
:
java.lang.reflect.InvocationTargetException
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:616)
at org.apache.commons.beanutils.PropertyUtilsBean.invokeMethod(PropertyUtilsBean.java:2170)
at org.apache.commons.beanutils.PropertyUtilsBean.getSimpleProperty(PropertyUtilsBean.java:1332)
at org.apache.commons.beanutils.PropertyUtilsBean.getNestedProperty(PropertyUtilsBean.java:770)
at org.apache.commons.beanutils.BeanUtilsBean.getNestedProperty(BeanUtilsBean.java:715)
at org.apache.commons.beanutils.BeanUtilsBean.getProperty(BeanUtilsBean.java:741)
at org.apache.commons.beanutils.BeanUtilsBean.describe(BeanUtilsBean.java:514)
at org.apache.commons.beanutils.BeanUtils.describe(BeanUtils.java:185)
at xxx.yyy.ejb.core.facade.AuditEntryFacade.getChangesBetweenTwoObjects(AuditEntryFacade.java:1198)
....
其根本原因如下:
Caused by: java.lang.NumberFormatException: For input string: "true"
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:481)
at java.lang.Integer.parseInt(Integer.java:514)
at xxx.yyy.ejb.core.entity.PSParameter.getIntegerValue(PSParameter.java:169)
... 87 more
任何提示为什么会发生这种情况?我的意思是,我很清楚异常的根本原因,无法将字符串解析为整数,但为什么BeanUtils及其描述会这样做?
无论如何要规避这一点,或任何替代方案?谢谢!