worddao.java

使用JAVA编写的博客

package com.yxq.dao;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import com.yxq.toolsbean.DB;
import com.yxq.valuebean.PhotoBean;
import com.yxq.valuebean.WordBean;

public class WordDao {
	private DB connection = null;

	public WordDao() {
		connection = new DB();
	}
	public boolean operationWord(String oper, WordBean single) {		
		/* 生成SQL语句 */
		String sql = null;
		if (oper.equals("add"))					//发表留言
			sql = "insert into tb_word values('"+single.getWordTitle()+"','"+single.getWordContent()+"','"+single.getWordTime()+"','"+single.getWordAuthor()+"')";		
		if (oper.equals("delete"))				//删除留言
			sql = "delete from tb_word where id=" + single.getId();

		
		/* 执行SQL语句 */	
		boolean flag =connection.executeUpdate(sql);
		return flag;
	}
	public List queryWord(String type){
		String sql="";
		if(type==null||type.equals(""))
			type="sub";
		if(type.equals("all"))
			sql="select * from tb_word order by word_sdTime DESC";
		else
			sql="select top 5 * from tb_word order by word_sdTime DESC";
		List wordlist = null;
		WordBean wordBean = null;
		ResultSet rs = connection.executeQuery(sql);
		if(rs!=null){
			wordlist=new ArrayList();
			try {
				while (rs.next()) {
					wordBean = new WordBean();
					wordBean.setId(rs.getInt(1));
					wordBean.setWordTitle(rs.getString(2));
					wordBean.setWordContent(rs.getString(3));
					wordBean.setWordTime(rs.getString(4));
					wordBean.setWordAuthor(rs.getString(5));
					wordlist.add(wordBean);
				}
			} catch (SQLException e) {
				e.printStackTrace();
			}			
		}
		return wordlist;
	}
}