jsf自定义组件-jafyear选择年份

<iframe align="top" marginwidth="0" marginheight="0" src="http://www.zealware.com/46860.html" frameborder="0" width="468" scrolling="no" height="60"></iframe>

就是一个下拉框，可以配置选取的范围，用today表示当期年份，输入简单表达式。

package com.cfcc.jaf.webx.component.jafdate.jafyear;

import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;

/***/ /**
*年份选择框组件
*@authorqinjinwei
*$date2007-9-12上午09:52:28
*/
public class JafYear extends UIComponentBase ... {

publicfinalStringJAF_DATE_FAMILY="jaf.jafdate";

publicStringgetFamily()...{
returnJAF_DATE_FAMILY;
}

publicObjectsaveState(FacesContextcontext)...{
Objectvalues[]=newObject[1];
values[0]=super.saveState(context);
returnvalues;
}

publicvoidrestoreState(FacesContextcontext,Objectstate)...{
Objectvalues[]=(Object[])state;
super.restoreState(context,values[0]);

}

}

package com.cfcc.jaf.webx.component.jafdate.jafyear;

import java.io.IOException;
import java.util.Date;
import java.util.Map;

import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.el.ValueBinding;

import org.apache.myfaces.shared_tomahawk.renderkit.html.HtmlRenderer;

/***/ /**
*年份选择框组件renderer
*@authorqinjinwei
*$date2007-9-12上午09:52:30
*/
public class JafYearRenderer extends HtmlRenderer ... {

publicvoidencodeEnd(FacesContextfacesContext,UIComponentcomponent)
throwsIOException...{

Stringsfrom=(String)component.getAttributes().get("from");
Stringsto=(String)component.getAttributes().get("to");
intifrom=convert(sfrom)+1900;
intito=convert(sto)+1900;
ResponseWriterwriter=facesContext.getResponseWriter();
StringclientId=component.getClientId(facesContext);


ValueBindingvb=component.getValueBinding("value");
Stringsyear=(String)vb.getValue(facesContext);
if(syear==null)
...{
syear=""+(newDate().getYear()+1900);
}

intyear=Integer.parseInt(syear);

writer.write(""+clientId+""name=""+clientId+""> ");
for(inti=ifrom;iito;i++)...{
writer.write(" "+i+""");
if(year==i)
...{
writer.write("selected");
}
writer.write(">"+i);
writer.write("年 ");
}
writer.write("");
}

publicvoiddecode(FacesContextfacesContext,UIComponentuiComponent)
...{
MapparamMap=facesContext.getExternalContext()
.getRequestParameterMap();
StringclientId=uiComponent.getClientId(facesContext);
if(paramMap.containsKey(clientId))
...{
Stringvalue=(String)paramMap
.get(clientId);

ValueBindingvb=uiComponent.getValueBinding("value");
vb.setValue(facesContext,value);
System.out.println(clientId+"valueis:"+value);
}
}

privateintconvert(Stringexp)...{

booleanbflagt=false;
booleanbflags=false;

Stringex=exp.replaceAll("","");
if(ex.startsWith("today"))...{
bflagt=true;
ex=ex.replaceAll("today","");
}

if(ex.startsWith("+"))...{
bflags=true;
}

ex=ex.substring(1,ex.length());

intrvalue=Integer.parseInt(ex);
if(!bflags)
...{
rvalue=-rvalue;
}

if(bflagt)
rvalue=rvalue+newDate().getYear();

returnrvalue;
}
}

package com.cfcc.jaf.webx.component.jafdate.jafyear;

import javax.faces.application.Application;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.el.ValueBinding;
import javax.faces.webapp.UIComponentTag;

/***/ /**
*年份选择框组件的标签
*@authorqinjinwei
*$date2007-9-12上午09:52:36
*/
public class JafYearTag extends UIComponentTag
... {

publicStringgetComponentType()
...{
return"com.cfcc.jaf.webx.component.jafdate.jafyear.JafYear";
}

publicStringgetRendererType()
...{
return"com.cfcc.jaf.webx.component.jafdate.jafyear.JafYearRenderer";
}

privateStringfrom;
privateStringto;
privateStringvalue;

publicStringgetValue()...{
returnvalue;
}

publicvoidsetValue(Stringvalue)...{
this.value=value;
}

publicStringgetFrom()...{
returnfrom;
}

publicvoidsetFrom(Stringfrom)...{
this.from=from;
}

publicStringgetTo()...{
returnto;
}

publicvoidsetTo(Stringto)...{
this.to=to;
}

publicvoidsetProperties(UIComponentcomponent)...{
super.setProperties(component);
setStringProperty(component,"from",from);
setStringProperty(component,"to",to);
setStringProperty(component,"value",value);
}

privatevoidsetStringProperty(UIComponentcomponent,StringattrName,
StringattrValue)...{
if(attrValue==null)
return;
if(isValueReference(attrValue))...{
FacesContextcontext=FacesContext.getCurrentInstance();
Applicationapplication=context.getApplication();
ValueBindingbinding=application.createValueBinding(attrValue);
component.setValueBinding(attrName,binding);
}else...{
component.getAttributes().put(attrName,attrValue);
}
}

publicvoidrelease()...{
super.release();
from=null;
to=null;
value=null;
}


}

tag>
name>jafyearname>
tag-class>
com.cfcc.jaf.webx.component.jafdate.jafyear.JafYearTag
tag-class>
body-content>emptybody-content>
attribute>
name>fromname>
required>truerequiredcolor: #0000ff

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