dbo.java

java web开发宝典源代码

package com.yxq.bean;

import java.sql.*;
import java.util.ArrayList;
import java.util.List;
public class DBO {
	private String URL;
	private String classname;
	private String username;
	private String password;
	private CreatePage createpage;
	
	private Connection con;
	private CallableStatement stm;
	private ResultSet rs;
	
	public DBO(){
		URL="jdbc:microsoft:sqlserver://localhost:1433;DatabaseName=db_FABD01";
		classname="com.microsoft.jdbc.sqlserver.SQLServerDriver";
		username="sa";
		password="";
		createpage=new CreatePage();
	}
	
	private void LoadDriver(){
		try{
			Class.forName(classname);
		}catch(ClassNotFoundException e){
			System.out.println("加载驱动程序失败！");
			e.printStackTrace();
		}
	}
	
	private Connection getCon(){
		LoadDriver();
		try{
	    	con=DriverManager.getConnection(URL,username,password);
		}catch(Exception e){
			System.out.println("创建数据库连接失败！");
			e.printStackTrace();
		}
		return con;
	}
	
	private Statement getStm(String proceName){
		Connection con=getCon();
		try{
			stm=con.prepareCall(proceName,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
		}catch(Exception e){
			System.out.println("创建CallableStatement对象失败！");
			e.printStackTrace();
		}
		return stm;
	}
	
	public int noteAdd(String title,String content,String sender,String sex,String from,String now,String qqnum,String ip){
		int i=-1;
		String procName="{call noteAdd(?,?,?,?,?,?,?,?)}";
		getStm(procName);
		try {
			stm.setString(1,title);
			stm.setString(2,content);
			stm.setString(3,sender);
			stm.setString(4,sex);
			stm.setString(5,from);
			stm.setString(6,now);
			stm.setString(7,qqnum);
			stm.setString(8,ip);
			i=stm.executeUpdate();
		} catch (SQLException e) {
			i=-1;
			e.printStackTrace();
		}
		return i;
	}
	public ResultSet noteSelect(String condition){
		ResultSet rs=null;
		String procName="{call noteSelect(?)}";
		getStm(procName);
		try{
			stm.setString(1,condition);
			rs=stm.executeQuery();
		}catch(Exception e){
			System.out.println("noteSelect出错！");
			e.printStackTrace();
		}
		return rs;
	}
	
	public List getCurrentList(int currentP,String condition){
		if(condition==null)
			condition="";
		List<NoteSingle> currentlist=new ArrayList<NoteSingle>();
		rs=noteSelect(condition);
		try{
			if(rs!=null){
				if(rs.next()){
					rs.last();
					createpage.setAllR(rs.getRow());
					createpage.setCurrentP(currentP);
					int pos=createpage.getPosR();
					int i=1;
					rs.absolute(pos);
					rs.previous();
					while(rs.next()&&i<=createpage.getPerR()){
						NoteSingle single=new NoteSingle();
						single.setId(rs.getInt("id"));
						single.setNoteTitle(rs.getString("note_title"));
						single.setNoteContent(rs.getString("note_content"));
						single.setNoteSender(rs.getString("note_sender"));
						single.setSenderSex(rs.getString("sender_sex"));
						single.setSenderFrom(rs.getString("sender_from"));
						single.setSenderTime(rs.getString("sender_time"));
						single.setSenderQQ(rs.getString("sender_QQ"));
						single.setSenderIP(rs.getString("sender_ip"));                    
						currentlist.add(single);
						i++;
					}				
				}				
			}
		}catch(Exception e){
			System.out.println("查询分页数据失败！");
			e.printStackTrace();
		}
		finally{
			closed();
		}
		return currentlist;		
	}
	
	public void closed(){
		try {
			if(rs!=null)
			    rs.close();
			if(stm!=null)
				stm.close();
			if(con!=null)
				con.close();
		} catch (SQLException e) {		
			System.out.println("关闭数据库连接失败！");
			e.printStackTrace();
		}
	}
	
	public String getClassname() {
		return classname;
	}
	public void setClassname(String classname) {
		this.classname = classname;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getURL() {
		return URL;
	}
	public void setURL(String url) {
		URL = url;
	}
	public String getUsername() {
		return username;
	}
	public void setUsername(String username) {
		this.username = username;
	}
	public CreatePage getCreatepage() {
		return createpage;
	}
	public void setCreatepage(CreatePage createpage) {
		this.createpage = createpage;
	}
	
}