listquery.java

采用目前流行的springstrutshibernate框架实现的增加、删除、查询、修改等操作的好例子

package com.wlpava.utils;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;


public class ListQuery implements IQuery {
	private int begin = 0;
	private int max = 0;
	private List list = null;

	public ListQuery() {

	}

	public ListQuery(List l) {
		if (l != null) {
			this.list = l;
			this.max = l.size();
		}
	}

	public void initList(List l) {
		this.list = l;
		this.max = l.size();
	}

	public int getRows(String conditing) {

		return (list == null ? 0 : list.size());
	}

	public List getResult(String conditing) {
		return list.subList(begin, begin + max > list.size() ? list.size()
				: begin + max);
	}

	public void setFirstResult(int begin) {
		this.begin = list.size() < begin ? list.size() : begin;
	}

	public void setMaxResults(int max) {
		this.max = max;
	}

	public List getResult(String conditing, int begin, int max) {

		return list;
	}

	public void setParaValues(Collection paraValues) {
		// TODO Auto-generated method stub
	}

	public static void main(String[] args) {
		List l = new ArrayList();
		for (int i = 0; i < 50; i++)
			l.add("test" + i);
		System.out.println(l.size());
		ListQuery lq = new ListQuery(l);
		lq.setFirstResult(49);
		lq.setMaxResults(10);
		List l1 = lq.getResult("");
		System.out.println(l1.size());
		for (int i = 0; i < l1.size(); i++)
			System.out.println(l1.get(i));
		System.out.println(l.size());
	}
}