dbcheckboxtag.java

这是一个轻便的j2ee的web应用框架,是一个在多个项目中运用的实际框架,采用struts,hebinate,xml等技术,有丰富的tag,role,navigation,session,dictio

/*
 * Created on 2004-8-22
 *
 */
package com.esimple.framework.web.taglib.database;

import java.util.List;

import javax.servlet.jsp.JspException;

import org.apache.commons.beanutils.BeanUtils;
import org.apache.struts.util.ResponseUtils;

/**
 * @author steven
 *
 */
public class DBCheckBoxTag extends BaseBindingTag {

	public int doStartTag() throws JspException {
		List list = getData();
		ResponseUtils.write(pageContext, renderSelectStartElement(list));
		return (EVAL_BODY_TAG);
	}

	/**
	 * Create an appropriate select start element based on our parameters.
	 * @throws JspException
	 * @since Struts 1.1
	 */
	protected String renderSelectStartElement(List list) throws JspException {
		StringBuffer results = new StringBuffer();
		if (list != null) {
			for (int i = 0; i < list.size(); i++) {
				Object vb = list.get(i);
				String label = null;
				String value = null;
				try {
					label = BeanUtils.getProperty(vb, labelName);
					value = BeanUtils.getProperty(vb, valueName);
				} catch (Exception e) {
					e.printStackTrace();
				}

				if (name == null || value == null) {
					continue;
				}

				results.append("<input type=\"checkbox\"");

				results.append(" name=\"");
				results.append(this.name);
				results.append("\"");

				if (accesskey != null) {
					results.append(" accesskey=\"");
					results.append(accesskey);
					results.append("\"");
				}
				if (tabindex != null) {
					results.append(" tabindex=\"");
					results.append(tabindex);
					results.append("\"");
				}
				results.append(" value=\"");
				if (value == null)
					results.append("on");
				else
					results.append(value);
				results.append("\"");
				
				if ( isDefault(value) )
					results.append(" checked=\"checked\"");
					
				results.append(prepareEventHandlers());
				results.append(prepareStyles());
				results.append(getElementClose());
				results.append(label + "&nbsp;");
			} //for end
		}
		return results.toString();
	}

	public int doEndTag() throws JspException {
		StringBuffer results = new StringBuffer();
		ResponseUtils.write(pageContext, results.toString());
		return (EVAL_PAGE);
	}
}