loadprop.java

一个用jsp技术实现的新闻发布系统

package net.ijsp.download.database;

import java.io.*;
import java.sql.*;
import java.util.*;
import java.util.Date;

public class LoadProp {

private	String driver,url,user,password,logfile;
private	int minconn=0,maxconn=0,debug=0;
private	String poolName;
private	int maxconntime=0;
private String indexPath;

private static LoadProp prop;

private static Object lock = new Object();

public LoadProp() {}

public static void main(String[] args) {
LoadProp lp = new LoadProp();
lp.prop();
}
/**
* 获取基本配置
*/ 
public LoadProp prop() {
	System.out.println("读取配置文件信息");
	if (prop == null) {
       synchronized (lock) {
         if (prop == null)
              prop = init1();
         }
    }
	return  prop;
}

/**
* 清除静态信息
*/
public void reSet() {
	this.prop = null;
}

/**
* 设置基本信息
*/
public void setDriver(String driver) {
	this.driver = driver;
}
public void setUrl(String url) {
	this.url = url;
}
public void setUser(String user) {
	this.user = user;
}
public void setPassword(String password) {
	this.password = password;
}
public void setLogfile(String logfile) {
	this.logfile = logfile;
}
public void setMinconn(int minconn) {
	this.minconn = minconn;
}
public void setMaxconn(int maxconn) {
	this.maxconn = maxconn;
}
public void setDebug(int debug) {
	this.debug = debug;
}
public void setMaxconntime(int maxconntime) {
	this.maxconntime = maxconntime;
}

public String getDriver() {
	return driver;
}
public String getUrl() {
	return url;
}
public String getUser() {
	return user;
}
public String getPassword() {
	return password;
}
public String getLogfile() {
	return logfile;
}
public int getMinconn() {
	return minconn;
}
public int getMaxconn() {
	return maxconn;
}

public int getDebug() {
	return debug;
}
public int getMaxconntime() {
	return maxconntime;
}
/**
* 索引文件地址
*/
public void setIndexPath(String indexPath) {
	this.indexPath = indexPath;
}
public String getIndexPath() {
	return indexPath;
}


/**
* 获取基本配置信息
*/
private synchronized LoadProp init1() {
	if(prop==null) {
		LoadProp lp = new LoadProp();
		/**
		* 打开配置信息文件
		*/
		InputStream is = getClass().getResourceAsStream("/downloaddb.txt");
		Properties props = new Properties();
		try {
		    props.load(is);
		}catch (Exception e) {
		    System.err.println("不能读取属性文件. 请确保downloaddb.txt在classes指定的路径中");
		}

		Enumeration propNames = props.propertyNames();
		while (propNames.hasMoreElements()) {
			String name = (String) propNames.nextElement();
			if (name.endsWith(".driver")) {
				poolName = name.substring(0, name.lastIndexOf("."));
				lp.setDriver(props.getProperty(poolName + ".driver"));
				lp.setUrl(props.getProperty(poolName + ".url"));
				lp.setUser(props.getProperty(poolName + ".user"));
				lp.setPassword(props.getProperty(poolName + ".password"));
				lp.setLogfile(props.getProperty(poolName + ".logfile"));
				lp.setMinconn(Integer.parseInt(props.getProperty(poolName + ".minconn")));
				lp.setMaxconn(Integer.parseInt(props.getProperty(poolName + ".maxconn")));
				lp.setMaxconntime(Integer.parseInt(props.getProperty(poolName + ".maxconntime")));
				lp.setDebug(Integer.parseInt(props.getProperty(poolName + ".debug")));
		}
	}
		return lp;
	}else{
		return prop;
	}
}

}