configurationfile.java

一个连接池源码,非常好用!创建一个cf,然后cf.getconn()就可以得到空闲连接,可以设置最大最小连接数

package PUB;
import java.io.*;
import java.io.FileOutputStream; 
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 这是个配置文件操作类，用来读取和设置ini配置文件
 * @author 由月
 * @version 2004-08-18
 */
public final class ConfigurationFile 
{
   private static   String dir;
   private static  String filename;
   private static String file;
	public ConfigurationFile(String d, String f) 
	{
		dir = d;
		filename = f;
		   file = dir + filename;

		try
		{

			if(!(new File(dir).isDirectory()))
			{
				new File(dir).mkdir(); 	
			}

			  
		}
		catch(SecurityException e)
		{
				 System.out.println("can not make directory");
		}

		try
		{
	 		File myFile = new File(file);
			if (!myFile.exists()) 
			{
				FileOutputStream fileOut = new FileOutputStream(file); 
				//write the string to the file as a byte array 
				//fileOut.write(file.getBytes(),0,file.length()); 
				fileOut.close();
			}
		} 
		catch (Exception f2) {} 
	 
	}


 /**
  * 从ini配置文件中读取变量的值
  * @param file 配置文件的路径
  * @param section 要获取的变量所在段名称
  * @param variable 要获取的变量名称
  * @param defaultValue 变量名称不存在时的默认值
  * @return 变量的值
  * @throws IOException 抛出文件操作可能出现的io异常
  */
 public static String getProfileString(

  String variable,
  String defaultValue)
  throws IOException {
  

 String  allLine,strLine, newLine;
  String getValue;
  BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
  boolean haveclose = false;
 
 
		try {
	   

				while ( (allLine = bufferedReader.readLine())  != null)
				{

					strLine = allLine.trim(); 

					String[] strArray = strLine.split("=");
					getValue = strArray[0].trim();

					if (strLine.length()-strArray[0].length()>1 && getValue.equalsIgnoreCase(variable))
					{
						String value =  strArray[1];
						if(value==null) value = "";
						if(value.length()>0)value = value.trim();
						bufferedReader.close();
						haveclose = true;
						return value;
					// out.println("ok");
					}

				}//while(alline=null)
		}catch(IOException ex){
		throw ex;
		} finally {
		bufferedReader.close();
		}
  if(!haveclose) bufferedReader.close();
  return defaultValue;
 }
 /**
 * 修改ini配置文件中变量的值
 * @param file 配置文件的路径
 * @param section 要修改的变量所在段名称
 * @param variable 要修改的变量名称
 * @param value 变量的新值
 * @throws IOException 抛出文件操作可能出现的io异常
 */
 public  static boolean setProfileString(
 
  String variable,
  String value)
  throws IOException
	{
   String file =dir +filename;
  String fileContent, allLine,strLine, newLine;
  String getValue;
  BufferedReader bufferedReader = new BufferedReader(new FileReader(file)); 

 
  fileContent = "";
  boolean havedo = false;
  try {
	   

   while ( (allLine = bufferedReader.readLine())  != null)
  {
 
		strLine = allLine.trim(); 
		String[] strArray = strLine.split("=");
		getValue = strArray[0].trim();

		if (getValue.equalsIgnoreCase(variable))
		{
		 //out.println(" getValue="+getValue);
			newLine = getValue + " = " + value  ;
			fileContent += newLine + "\r\n"; 
			havedo = true;
		}
		else
		{ 
			fileContent += allLine + "\r\n";
		}
	 
   }//while(alline=null)
 
 
 
   if(!havedo)
   {
			  newLine =  variable + " = " + value  ;
			  fileContent += newLine  ;
			  havedo = true; 
   }
 
 
	  bufferedReader.close();
	  BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, false));
	  bufferedWriter.write(fileContent);
	   bufferedWriter.flush();
	  bufferedWriter.close();
	  if(havedo) return true;
  }catch(IOException ex){
   throw ex;
  } finally {
   bufferedReader.close();
  }

  return false;
 }

 /**
  * 程序测试
  */
 /*
 public static void main(String[] args) {
  //String value = Config.getProfileString("sysconfig.ini", "Option", "OracleDB", "default");
  //System.out.println(value);
  try {
   System.out.println(ConfigurationFile.setProfileString("d:/1.ini", "Settings", "SampSize", "111"));
  } catch (IOException e) {
   System.out.println(e.toString());
  }
  
 }*/
}