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/name<


>tag-class<


com.cfcc.jaf.webx.component.jafdate.jafyear.JafYearTag


>/tag-class<


>body-content/body-content<


>attribute<


>name/name<


>required/required<


>/attribute<


>attribute<


>name/name<


>required/required<


>/attribute<


>attribute<


>name/name<


>required/required<


>/attribute<


>/tag<


>renderer<


>component-family/component-family<


>renderer-type/renderer-type<


>renderer-class/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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