iteratetag.java

自已个人写的一款比较好的分页java+javabean+struts标签完成的自定义分页

package cn.com.thinkbank.tags;

import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.Iterator;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;

import org.apache.commons.beanutils.PropertyUtils;

public class IterateTag extends TagSupport {
	private String id;

	private String name;

	private String property;

	private Iterator iterator;

	public void setId(String id) {
		this.id = id;
	}

	public void setName(String name) {
		this.name = name;
	}

	public void setProperty(String property) {
		this.property = property;
	}

	public int doStartTag() throws JspException {
		Object object = TagUtils.lookup(name, pageContext);
		try {
			if (property != null) {
				object = PropertyUtils.getProperty(object, property);
			}
			Collection coll = (Collection) object;
			iterator = coll.iterator();

		} catch (IllegalAccessException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		} catch (NoSuchMethodException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}

		if (iterator.hasNext()) {
			Object obj = iterator.next();
			pageContext.setAttribute(id, obj);
			return EVAL_BODY_INCLUDE;
		} else {
			return SKIP_BODY;
		}

	}

	public int doAfterBody() throws JspException {
		if (iterator.hasNext()) {
			Object obj = iterator.next();
			pageContext.setAttribute(id, obj);
			return EVAL_BODY_AGAIN;
		} else {
			return SKIP_BODY;
		}

	}

	public int doEndTag() throws JspException {
		pageContext.removeAttribute(id);
		iterator = null;
		return EVAL_PAGE;
	}

}