project_manager.java

本系统实现的是一个信息发布平台

/*
 * 创建日期 2005-9-1
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package cn.edu.bit.business;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.ArrayList;

import cn.edu.bit.DBQuery.DataProcess;
import cn.edu.bit.Object.Project;

/**
 * @author ligang
 *
 * TODO 要更改此生成的类型注释的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
public class Project_Manager {
	
	public static void Add_Project(String name,String info,String time)
	{
		try
		{
			name=new String(name.getBytes("ISO8859_1"));
		
			info=new String(info.getBytes("ISO8859_1"));
			
			time=new String(time.getBytes("ISO8859_1"));
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		String query = "insert into project(name,info,time) values('"+name+
						"','"+info+"','"+time+"')";
		
		try
		{
			DataProcess.ExeQuery(query);
		}
		catch(Exception e){
			e.printStackTrace();
		}
		
	}
	
	
	public static void Edit_Project(int id,String name,String info,String time)
	{
		try
		{
			name=new String(name.getBytes("ISO8859_1"));
		
			info=new String(info.getBytes("ISO8859_1"));
			
			time=new String(time.getBytes("ISO8859_1"));
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
		
		String query = "update project set name='"+name+
						"',info='"+info+"',time='"+time+"' where id="+id;
		
		try
		{
			DataProcess.ExeQuery(query);
		}
		catch(Exception e){
			e.printStackTrace();
		}
	}
	
	public static void Delete_Project(int id)
	{
		String query = "delete from project where id="+id;
		
		try
		{
			DataProcess.ExeQuery(query);
		}
		catch(Exception e){
			e.printStackTrace();
		}
		
	}
	
	
	public static Project getProject(int ID)
	{
		String selectStr = "select * from project where id="+ID;
		
		Connection con = DataProcess.getConnection();
		
		Project pro = Project.getInstance();
		
		try{
			
			Statement stmt = con.createStatement();
			
			ResultSet rs = stmt.executeQuery(selectStr);
			
			if(rs.next())
			{				
				String name = rs.getString("name");
				
				String info = rs.getString("info");
								
				String time = rs.getString("time");
				
				pro.setId(ID);
				
				pro.setName(name);
				
				pro.setInfo(info);
				
				pro.setTime(time);
			}
			
			rs.close();
			
			stmt.close();
			
			con.close();
			
			return pro;
		
		}
		catch(Exception e)
		{
			e.printStackTrace();
			
			return null;
		}
	}

	public static ArrayList getProjectList()
	{
		String query = "select * from project";
		
		Connection con = DataProcess.getConnection();
		
		ArrayList pl = new ArrayList();
		
		try{
			
			Statement stmt = con.createStatement();
			
			ResultSet rs = stmt.executeQuery(query);
			
			while(rs.next())
			{				
				int ID = rs.getInt("id");
				
				String name = rs.getString("name");
				
				String info = rs.getString("info");
								
				String time = rs.getString("time");
				
				Project pro = Project.getInstance();
				
				pro.setId(ID);
				
				pro.setName(name);
				
				pro.setInfo(info);
				
				pro.setTime(time);
				
				pl.add(pro);
			}
			
			rs.close();
			
			stmt.close();
			
			con.close();
			
			return pl;
		
		}
		catch(Exception e)
		{
			e.printStackTrace();
			
			return null;
		}
		
	}	

}