Java JSF:XMLGregorianCalendar的日期时间转换器

我正在使用RESTWebService并直接使用视图中的JAXB对象。一个人的日期是

xmlgoriancalendar

，如下所示：

@XmlAttribute(name = "record")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar record;

record.toGregorianCalendar().getTime();

<h:outputText value="#{bean.value.record.toGregorianCalendar().time}" >
    <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>

@FacesConverter("com.examples.Date")
public class XMLGregorianCalConverter extends DateTimeConverter {
 private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("GMT");
 private String dateStyle = "default";
 private Locale locale = null;
 private String pattern = null;
 private String timeStyle = "default";
 private TimeZone timeZone = DEFAULT_TIME_ZONE;
 private String type = "date";

@Override
public Object getAsObject(FacesContext context, UIComponent component, String newValue) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
    Map<String, Object> attributes = component.getAttributes();
    if(attributes.containsKey("pattern")){
        pattern = (String) attributes.get("pattern");
    }
    setPattern(pattern);
    if(attributes.containsKey("locale")){
        locale = (Locale) attributes.get("locale");
    }
    setLocale(locale);
    if(attributes.containsKey("timeZone")){
        timeZone = (TimeZone) attributes.get("timeZone");
    }
    setTimeZone(timeZone);
    if(attributes.containsKey("dateStyle")){
        dateStyle = (String) attributes.get("dateStyle");
    }
    setDateStyle(dateStyle);
    if(attributes.containsKey("timeStyle")){
        timeStyle = (String) attributes.get("timeStyle");
    }
    setTimeStyle(timeStyle);
    if(attributes.containsKey("type")){
        type = (String) attributes.get("type");
    }
    setType(type);

    XMLGregorianCalendar xmlGregCal = (XMLGregorianCalendar) value;
    Date date = xmlGregCal.toGregorianCalendar().getTime();
    return super.getAsString(context, component, date);
}

}

<h:outputText value="#{bean.value.record}" >
    <f:converter converterId="com.examples.Date" />
    <f:attribute name="pattern" value="dd.MM.yy" />
</h:outputText>

在尝试使用标准转换器时

<h:outputText value="#{bean.value.record}" >
  <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>  

似乎默认转换器不支持类型

XMLGregorianCalendar

。我想知道这个日期类型的JSF转换器是否可用，因为这个需求似乎并没有那么不寻常

EditRavi提供了一个自定义转换器的功能示例，但这似乎不灵活：

• 模式是硬编码的
• 不支持本地用户

---

您可以注册一个自定义XML适配器，将XMLGregorianCalendar转换为日历或日期，具体如下：

值的类型应为java.util.Date

因此，从XMLGregorianCalendar获取日期对象，如下所示：

@XmlAttribute(name = "record")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar record;

record.toGregorianCalendar().getTime();

<h:outputText value="#{bean.value.record.toGregorianCalendar().time}" >
    <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>

@FacesConverter("com.examples.Date")
public class XMLGregorianCalConverter extends DateTimeConverter {
 private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("GMT");
 private String dateStyle = "default";
 private Locale locale = null;
 private String pattern = null;
 private String timeStyle = "default";
 private TimeZone timeZone = DEFAULT_TIME_ZONE;
 private String type = "date";

@Override
public Object getAsObject(FacesContext context, UIComponent component, String newValue) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
    Map<String, Object> attributes = component.getAttributes();
    if(attributes.containsKey("pattern")){
        pattern = (String) attributes.get("pattern");
    }
    setPattern(pattern);
    if(attributes.containsKey("locale")){
        locale = (Locale) attributes.get("locale");
    }
    setLocale(locale);
    if(attributes.containsKey("timeZone")){
        timeZone = (TimeZone) attributes.get("timeZone");
    }
    setTimeZone(timeZone);
    if(attributes.containsKey("dateStyle")){
        dateStyle = (String) attributes.get("dateStyle");
    }
    setDateStyle(dateStyle);
    if(attributes.containsKey("timeStyle")){
        timeStyle = (String) attributes.get("timeStyle");
    }
    setTimeStyle(timeStyle);
    if(attributes.containsKey("type")){
        type = (String) attributes.get("type");
    }
    setType(type);

    XMLGregorianCalendar xmlGregCal = (XMLGregorianCalendar) value;
    Date date = xmlGregCal.toGregorianCalendar().getTime();
    return super.getAsString(context, component, date);
}

}

<h:outputText value="#{bean.value.record}" >
    <f:converter converterId="com.examples.Date" />
    <f:attribute name="pattern" value="dd.MM.yy" />
</h:outputText>

更新：

您可以这样使用：

@XmlAttribute(name = "record")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar record;

record.toGregorianCalendar().getTime();

<h:outputText value="#{bean.value.record.toGregorianCalendar().time}" >
    <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>

@FacesConverter("com.examples.Date")
public class XMLGregorianCalConverter extends DateTimeConverter {
 private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("GMT");
 private String dateStyle = "default";
 private Locale locale = null;
 private String pattern = null;
 private String timeStyle = "default";
 private TimeZone timeZone = DEFAULT_TIME_ZONE;
 private String type = "date";

@Override
public Object getAsObject(FacesContext context, UIComponent component, String newValue) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
    Map<String, Object> attributes = component.getAttributes();
    if(attributes.containsKey("pattern")){
        pattern = (String) attributes.get("pattern");
    }
    setPattern(pattern);
    if(attributes.containsKey("locale")){
        locale = (Locale) attributes.get("locale");
    }
    setLocale(locale);
    if(attributes.containsKey("timeZone")){
        timeZone = (TimeZone) attributes.get("timeZone");
    }
    setTimeZone(timeZone);
    if(attributes.containsKey("dateStyle")){
        dateStyle = (String) attributes.get("dateStyle");
    }
    setDateStyle(dateStyle);
    if(attributes.containsKey("timeStyle")){
        timeStyle = (String) attributes.get("timeStyle");
    }
    setTimeStyle(timeStyle);
    if(attributes.containsKey("type")){
        type = (String) attributes.get("type");
    }
    setType(type);

    XMLGregorianCalendar xmlGregCal = (XMLGregorianCalendar) value;
    Date date = xmlGregCal.toGregorianCalendar().getTime();
    return super.getAsString(context, component, date);
}

}

<h:outputText value="#{bean.value.record}" >
    <f:converter converterId="com.examples.Date" />
    <f:attribute name="pattern" value="dd.MM.yy" />
</h:outputText>

这实际上应该是可行的，但因为你说你得到了一个非法的访问例外，我不确定确切的原因

或者，如果愿意，也可以编写自己的转换器，转换器将如下所示：

@XmlAttribute(name = "record")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar record;

record.toGregorianCalendar().getTime();

<h:outputText value="#{bean.value.record.toGregorianCalendar().time}" >
    <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>

@FacesConverter("com.examples.Date")
public class XMLGregorianCalConverter extends DateTimeConverter {
 private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("GMT");
 private String dateStyle = "default";
 private Locale locale = null;
 private String pattern = null;
 private String timeStyle = "default";
 private TimeZone timeZone = DEFAULT_TIME_ZONE;
 private String type = "date";

@Override
public Object getAsObject(FacesContext context, UIComponent component, String newValue) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
    Map<String, Object> attributes = component.getAttributes();
    if(attributes.containsKey("pattern")){
        pattern = (String) attributes.get("pattern");
    }
    setPattern(pattern);
    if(attributes.containsKey("locale")){
        locale = (Locale) attributes.get("locale");
    }
    setLocale(locale);
    if(attributes.containsKey("timeZone")){
        timeZone = (TimeZone) attributes.get("timeZone");
    }
    setTimeZone(timeZone);
    if(attributes.containsKey("dateStyle")){
        dateStyle = (String) attributes.get("dateStyle");
    }
    setDateStyle(dateStyle);
    if(attributes.containsKey("timeStyle")){
        timeStyle = (String) attributes.get("timeStyle");
    }
    setTimeStyle(timeStyle);
    if(attributes.containsKey("type")){
        type = (String) attributes.get("type");
    }
    setType(type);

    XMLGregorianCalendar xmlGregCal = (XMLGregorianCalendar) value;
    Date date = xmlGregCal.toGregorianCalendar().getTime();
    return super.getAsString(context, component, date);
}

}

<h:outputText value="#{bean.value.record}" >
    <f:converter converterId="com.examples.Date" />
    <f:attribute name="pattern" value="dd.MM.yy" />
</h:outputText>

如果要使用与dateTimeConverter相同的属性，则需要将它们作为属性传递给组件，并像下面这样扩展dateTimeConverter：

@XmlAttribute(name = "record")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar record;

record.toGregorianCalendar().getTime();

<h:outputText value="#{bean.value.record.toGregorianCalendar().time}" >
    <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>

@FacesConverter("com.examples.Date")
public class XMLGregorianCalConverter extends DateTimeConverter {
 private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("GMT");
 private String dateStyle = "default";
 private Locale locale = null;
 private String pattern = null;
 private String timeStyle = "default";
 private TimeZone timeZone = DEFAULT_TIME_ZONE;
 private String type = "date";

@Override
public Object getAsObject(FacesContext context, UIComponent component, String newValue) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
    Map<String, Object> attributes = component.getAttributes();
    if(attributes.containsKey("pattern")){
        pattern = (String) attributes.get("pattern");
    }
    setPattern(pattern);
    if(attributes.containsKey("locale")){
        locale = (Locale) attributes.get("locale");
    }
    setLocale(locale);
    if(attributes.containsKey("timeZone")){
        timeZone = (TimeZone) attributes.get("timeZone");
    }
    setTimeZone(timeZone);
    if(attributes.containsKey("dateStyle")){
        dateStyle = (String) attributes.get("dateStyle");
    }
    setDateStyle(dateStyle);
    if(attributes.containsKey("timeStyle")){
        timeStyle = (String) attributes.get("timeStyle");
    }
    setTimeStyle(timeStyle);
    if(attributes.containsKey("type")){
        type = (String) attributes.get("type");
    }
    setType(type);

    XMLGregorianCalendar xmlGregCal = (XMLGregorianCalendar) value;
    Date date = xmlGregCal.toGregorianCalendar().getTime();
    return super.getAsString(context, component, date);
}

}

<h:outputText value="#{bean.value.record}" >
    <f:converter converterId="com.examples.Date" />
    <f:attribute name="pattern" value="dd.MM.yy" />
</h:outputText>

@FacesConverter（“com.examples.Date”）
公共类XmlGregorianConverter扩展了DateTimeConverter{
私有静态最终时区默认值\u TIME\u ZONE=TimeZone.getTimeZone（“GMT”）；
私有字符串dateStyle=“default”；
私有区域设置=null；
私有字符串模式=null；
私有字符串timeStyle=“default”；
专用时区时区=默认时区；
私有字符串type=“日期”；
@凌驾
公共对象getAsObject（FacesContext上下文、UIComponent组件、字符串newValue）{
//TODO自动生成的方法存根
返回null；
}
@凌驾
公共字符串getAsString（FacesContext上下文、UIComponent、对象值）{
映射属性=component.getAttributes（）；
if（attributes.containsKey（“模式”））{
pattern=（String）attributes.get（“pattern”）；
}
设置模式（模式）；
if（attributes.containsKey（“locale”））{
locale=（locale）attributes.get（“locale”）；
}
setLocale（locale）；
if（attributes.containsKey（“时区”））{
timeZone=（timeZone）attributes.get（“timeZone”）；
}
设置时区（时区）；
if（attributes.containsKey（“日期样式”））{
dateStyle=（String）attributes.get（“dateStyle”）；
}
setDateStyle（dateStyle）；
if（attributes.containsKey（“时间样式”））{
timeStyle=（String）attributes.get（“timeStyle”）；
}
setTimeStyle（timeStyle）；
if（attributes.containsKey（“类型”））{
type=（String）attributes.get（“type”）；
}
setType（类型）；
XMLGregorianCalendar xmlGregCal=（XMLGregorianCalendar）值；
Date Date=xmlGregCal.toGregorianCalendar（）.getTime（）；
返回super.getAsString（上下文、组件、日期）；
}
}

并在您的页面上使用如下内容：

@XmlAttribute(name = "record")
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar record;

record.toGregorianCalendar().getTime();

<h:outputText value="#{bean.value.record.toGregorianCalendar().time}" >
    <f:convertDateTime pattern="dd.MM.yy" />    
</h:outputText>

@FacesConverter("com.examples.Date")
public class XMLGregorianCalConverter extends DateTimeConverter {
 private static final TimeZone DEFAULT_TIME_ZONE = TimeZone.getTimeZone("GMT");
 private String dateStyle = "default";
 private Locale locale = null;
 private String pattern = null;
 private String timeStyle = "default";
 private TimeZone timeZone = DEFAULT_TIME_ZONE;
 private String type = "date";

@Override
public Object getAsObject(FacesContext context, UIComponent component, String newValue) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public String getAsString(FacesContext context, UIComponent component, Object value) {
    Map<String, Object> attributes = component.getAttributes();
    if(attributes.containsKey("pattern")){
        pattern = (String) attributes.get("pattern");
    }
    setPattern(pattern);
    if(attributes.containsKey("locale")){
        locale = (Locale) attributes.get("locale");
    }
    setLocale(locale);
    if(attributes.containsKey("timeZone")){
        timeZone = (TimeZone) attributes.get("timeZone");
    }
    setTimeZone(timeZone);
    if(attributes.containsKey("dateStyle")){
        dateStyle = (String) attributes.get("dateStyle");
    }
    setDateStyle(dateStyle);
    if(attributes.containsKey("timeStyle")){
        timeStyle = (String) attributes.get("timeStyle");
    }
    setTimeStyle(timeStyle);
    if(attributes.containsKey("type")){
        type = (String) attributes.get("type");
    }
    setType(type);

    XMLGregorianCalendar xmlGregCal = (XMLGregorianCalendar) value;
    Date date = xmlGregCal.toGregorianCalendar().getTime();
    return super.getAsString(context, component, date);
}

}

<h:outputText value="#{bean.value.record}" >
    <f:converter converterId="com.examples.Date" />
    <f:attribute name="pattern" value="dd.MM.yy" />
</h:outputText>

---

代码灵感来源于/复制自以下问题：

我正在使用一个包含JAXB类的提供库，因此XML适配器不是一个选项。是的，在Java中很容易，但在JSF中如何做到这一点？Update1抛出了一个IllegaccessException。正如预期的那样，您的替代方案是有效的，但不灵活，因为模式是在

XMLGregorianConverter

中硬编码的。