Validation 著名的验证错误:值无效
我搜索了很多著名的“验证错误:值无效”。我知道这可能和equals方法有关。但是找不到我的有什么问题 xhtml:Validation 著名的验证错误:值无效,validation,jsf-2,Validation,Jsf 2,我搜索了很多著名的“验证错误:值无效”。我知道这可能和equals方法有关。但是找不到我的有什么问题 xhtml: <h:selectOneMenu id="ayarMenuSA" rendered="#{teklifIslemleriBean.selectedITip == 1}" converter="metalConverter" value="#{teklifIslemleriBean.satisTeklif.metal}"> <f:selectItems
<h:selectOneMenu id="ayarMenuSA" rendered="#{teklifIslemleriBean.selectedITip == 1}" converter="metalConverter" value="#{teklifIslemleriBean.satisTeklif.metal}">
<f:selectItems value="#{teklifIslemleriBean.ayarMenu}" />
</h:selectOneMenu>
转换器:
@FacesConverter("metalConverter")
public class MetalConverter implements Converter, Serializable {
private static final long serialVersionUID = -1L;
@Override
public Object getAsObject(FacesContext facesContext, UIComponent component, String str) {
if (str == null || str.length() == 0) {
return null;
}
System.out.println("metalConverter getAsObject("+ str);
Metal metal = new Metal();
String values[] = str.split(":");
if (values.length > 1) {
metal.setMetalNo(Integer.parseInt(values[0]));
metal.setAyar(new BigDecimal(values[1]));
metal.setAgirlik(new BigDecimal(values[2]));//?? intcompact=1500
metal.setMetalKod(new MetalKod(values[3]));
metal.setMetalTip(new MetalTip(values[4]));
}
return metal;
}
Integer getKey(String value) {
Integer key;
key = Integer.valueOf(value);
return key;
}
String appendString(Integer value) {
StringBuilder sb = new StringBuilder();
sb.append(value);
return sb.toString();
}
@Override
public String getAsString(FacesContext facesContext, UIComponent component, Object object) {
if (object == null) {
return null;
}
if (object instanceof Metal) {
Metal metal = (Metal) object;
StringBuilder sb = new StringBuilder();
sb.append(metal.getMetalNo());
sb.append(':');
sb.append(metal.getAyar().toString());
sb.append(':');
sb.append(metal.getAgirlik().toString());
sb.append(':');
sb.append(metal.getMetalKod().getMetalKodu());
sb.append(':');
sb.append(metal.getMetalTip().getMetalTipiId());
System.out.println("metalConverter getAsString(object) -> " + sb.toString());
return sb.toString();
} else {
throw new IllegalArgumentException(object + " nesnesi " + object.getClass().getName() + "tipinde geliyor; olması gereken tip ise: " + Metal.class.getName());
}
}
实际上,如果我这样写equals方法:
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Metal other = (Metal) obj;
return true;
}
它很好用。但是由于某些原因,我不得不使用上面的代码。有人知道这个问题吗?你不应该用
==
或来比较相等的对象=代码>。为此,应使用Object#equals()
方法<例如,code>Integer
是一个对象,而int
是一个原语,可以使用==
安全地进行比较
您需要重写equals()
方法,如下所示:
private Integer metalNo;
private MetalTip metalTip;
private MetalKod metalKod;
private BigDecimal agirlik;
private BigDecimal ayar;
private boolean durum;
// ...
public boolean equals(Object object) {
// Basic checks.
if (object == this) return true;
if (object == null || getClass() != object.getClass()) return false;
// Property checks.
Metal other = (Metal) object;
if (metalNo == null ? other.metalNo != null : !metalNo.equals(other.metalNo)) return false;
if (metalTip == null ? other.metalTip != null : !metalTip.equals(other.metalTip)) return false;
if (metalKod == null ? other.metalKod != null : !metalKod.equals(other.metalKod)) return false;
if (agirlik == null ? other.agirlik != null : !agirlik.equals(other.agirlik)) return false;
if (ayar == null ? other.ayar != null : !ayar.equals(other.ayar)) return false;
if (durum != other.durum) return false;
// All passed.
return true;
}
如有必要,您可以随时让IDE自动生成一个
很有趣,因为我使用了Netbeans插入代码选项来生成此方法。我会落实你的答案,并让你知道结果。感谢您的快速响应。仍然存在相同的验证错误。此代码可能还有其他问题,但我找不到。可能是
MetalTip
或MetalKod
的equals()
已损坏。
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Metal other = (Metal) obj;
return true;
}
private Integer metalNo;
private MetalTip metalTip;
private MetalKod metalKod;
private BigDecimal agirlik;
private BigDecimal ayar;
private boolean durum;
// ...
public boolean equals(Object object) {
// Basic checks.
if (object == this) return true;
if (object == null || getClass() != object.getClass()) return false;
// Property checks.
Metal other = (Metal) object;
if (metalNo == null ? other.metalNo != null : !metalNo.equals(other.metalNo)) return false;
if (metalTip == null ? other.metalTip != null : !metalTip.equals(other.metalTip)) return false;
if (metalKod == null ? other.metalKod != null : !metalKod.equals(other.metalKod)) return false;
if (agirlik == null ? other.agirlik != null : !agirlik.equals(other.agirlik)) return false;
if (ayar == null ? other.ayar != null : !ayar.equals(other.ayar)) return false;
if (durum != other.durum) return false;
// All passed.
return true;
}