jsf自定义组件-jafyear选择年份

2007年10月19日 13:16:24

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
* @author qinjinwei
* $date 2007-9-12 上午09:52:28
*/
public class JafYear extends UIComponentBase ...{

public final String JAF_DATE_FAMILY = "jaf.jafdate";

public String getFamily() ...{
return JAF_DATE_FAMILY;
}

public Object saveState(FacesContext context) ...{
Object values[] = new Object[1];
values[0] = super.saveState(context);
return values;
}

public void restoreState(FacesContext context, Object state) ...{
Object values[] = (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
* @author qinjinwei
* $date 2007-9-12 上午09:52:30
*/
public class JafYearRenderer extends HtmlRenderer ...{

public void encodeEnd(FacesContext facesContext, UIComponent component)
throws IOException ...{

String sfrom = (String) component.getAttributes().get("from");
String sto = (String) component.getAttributes().get("to");
int ifrom = convert(sfrom) + 1900;
int ito = convert(sto) + 1900;
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = component.getClientId(facesContext);


ValueBinding vb = component.getValueBinding("value");
String syear = (String) vb.getValue(facesContext);
if(syear == null)
...{
syear = "" + (new Date().getYear() + 1900 );
}

int year = Integer.parseInt(syear);

writer.write(">select id="" + clientId + "" name="" + clientId + ""< ");
for (int i = ifrom; i >= ito; i++) ...{
writer.write(">option value="" + i + """);
if(year == i)
...{
writer.write(" selected ");
}
writer.write("<" + i );
writer.write("年>/option< ");
}
writer.write(">/select<");
}

public void decode(FacesContext facesContext, UIComponent uiComponent)
...{
Map paramMap = facesContext.getExternalContext()
.getRequestParameterMap();
String clientId = uiComponent.getClientId(facesContext);
if(paramMap.containsKey(clientId))
...{
String value = (String) paramMap
.get(clientId);

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

private int convert(String exp) ...{

boolean bflagt = false;
boolean bflags = false;

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

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

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

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

if (bflagt)
rvalue = rvalue + new Date().getYear();

return rvalue;
}
}

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
* @author qinjinwei
* $date 2007-9-12 上午09:52:36
*/
public class JafYearTag extends UIComponentTag
...{

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

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

private String from;
private String to;
private String value;

public String getValue() ...{
return value;
}

public void setValue(String value) ...{
this.value = value;
}

public String getFrom() ...{
return from;
}

public void setFrom(String from) ...{
this.from = from;
}

public String getTo() ...{
return to;
}

public void setTo(String to) ...{
this.to = to;
}

public void setProperties(UIComponent component) ...{
super.setProperties(component);
setStringProperty(component, "from", from);
setStringProperty(component, "to", to);
setStringProperty(component, "value", value);
}

private void setStringProperty(UIComponent component, String attrName,
String attrValue) ...{
if (attrValue == null)
return;
if (isValueReference(attrValue)) ...{
FacesContext context = FacesContext.getCurrentInstance();
Application application = context.getApplication();
ValueBinding binding = application.createValueBinding(attrValue);
component.setValueBinding(attrName, binding);
} else ...{
component.getAttributes().put(attrName, attrValue);
}
}

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


}

>tag<
>name<jafyear>/name<
>tag-class<
com.cfcc.jaf.webx.component.jafdate.jafyear.JafYearTag
>/tag-class<
>body-content<empty>/body-content<
>attribute<
>name<from>/name<
>required<true>/required<
>/attribute<
>attribute<
>name<to>/name<
>required<true>/required<
>/attribute<
>attribute<
>name<value>/name<
>required<true>/required<
>/attribute<
>/tag<

>renderer<
>component-family<jaf.jafdate>/component-family<
>renderer-type<com.cfcc.jaf.webx.component.jafdate.jafyear.JafYearRenderer>/renderer-type<
>renderer-class<com.cfcc.jaf.webx.component.jafdate.jafyear.JafYearRenderer>/renderer-class<
>/renderer<

>component<
>component-type<
com.cfcc.jaf.webx.component.jafdate.jafyear.JafYear
>/component-type<
>component-class<
com.cfcc.jaf.webx.component.jafdate.jafyear.JafYear
>/component-class<
>/component<

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