jsf1.2/facelet1.x中convertor的自定义

第一步，先定义一个validator继承jsf中的validator，如果需要有状态就必须实现StateHolder接口 package com.xx.web.validator;import javax.faces.component.StateHolder;import javax.faces.component.UIComponent;import javax.faces.context.FacesContext

第一步，先定义一个validator继承jsf中的validator，如果需要有状态就必须实现StateHolder接口

package com.xx.web.validator;

import javax.faces.component.StateHolder;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.validator.Validator;
import javax.faces.validator.ValidatorException;

public class NumberValidator implements Validator, StateHolder {
	private int precision = 10;
	private int scale = 6;
	private boolean mustPositive = true;


	public NumberValidator() {

	}

	public void setPrecision(int precision) {
	this.precision = precision;
	}

	public void setScale(int scale) {
	this.scale = scale;
	}

	public void setMustPositive(Boolean mustPositive) {
	this.mustPositive = mustPositive;
	}

	@Override
	public void validate(FacesContext context, UIComponent component,
	Object value) throws ValidatorException {
	//这里是具体验证的逻辑
	}

	@Override
	public Object saveState(FacesContext context) {

	Object values[] = new Object[3];
	values[0] = precision;
	values[1] = scale;
	values[2]=	mustPositive;
	return (values);

	}
	@Override
	public void restoreState(FacesContext context, Object state) {

	Object values[] = (Object[]) state;
	precision = (Integer) values[0];
	scale = (Integer) values[1];
	mustPositive=(Boolean)values[2];

	}

	@Override
	public boolean isTransient() {
	return false;
	}

	@Override
	public void setTransient(boolean newTransientValue) {

	}

}

 numberValidator
 com.xx.web.validator.NumberValidator

但是上面的参数无法添加

因为我们使用了facelet，所以要定义一个facelet的tag

package com.xx.web.validator;

import javax.faces.validator.Validator;

import com.sun.facelets.FaceletContext;
import com.sun.facelets.tag.TagAttribute;
import com.sun.facelets.tag.jsf.ValidateHandler;
import com.sun.facelets.tag.jsf.ValidatorConfig;

public class NumberValidatorHandler extends ValidateHandler {

	private final TagAttribute precisionAttr;
	private final TagAttribute scaleAttr;
	private final TagAttribute mustPositiveAttr;

	public NumberValidatorHandler(ValidatorConfig config) {
	super(config);
	precisionAttr = this.getAttribute("precision");
	scaleAttr = this.getAttribute("scale");
	mustPositiveAttr = this.getAttribute("mustPositive");
	}

	@Override
	protected Validator createValidator(FaceletContext ctx) {
	NumberValidator result = (NumberValidator) ctx.getFacesContext()
	.getApplication().createValidator("number");

	if (precisionAttr != null)
	result.setPrecision(Integer.valueOf(precisionAttr.getValue(ctx)));
	if (scaleAttr != null)
	result.setScale(Integer.valueOf(scaleAttr.getValue(ctx)));
	if (mustPositiveAttr != null)
	result.setMustPositive(Boolean.valueOf(mustPositiveAttr
	.getValue(ctx)));

	return result;
	}

}

	validateNumber
	
	number
	com.xx.validator.NumberValidatorHandler