Java工具類---資源文件解析類 PropertiesUtil

package com.luang.util.properties;
import java.io.File;
import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;
import java.io.OutputStream;

import java.net.URI;
import java.util.Enumeration;

import java.util.HashMap;

import java.util.Map;

import java.util.Properties;

import java.util.ResourceBundle;

/**


PropertiesUtil.java
*
@desc properties 資源文件解析工具
@author Guoxp
@datatime Apr 7, 2013 3:58:45 PM
/
public class PropertiesUtil {
private Properties props;

 private URI uri;
public PropertiesUtil(String fileName){

 readProperties(fileName);  

}

 private void readProperties(String fileName) {

 try {  
     props = new Properties();  
     InputStream fis =getClass().getResourceAsStream(fileName);  
     props.load(fis);  
     uri = this.getClass().getResource("/dbConfig.properties").toURI();
 } catch (Exception e) {  
     e.printStackTrace();  
 }  

}

 /**

獲取某個屬性 
*/

public String getProperty(String key){

 return props.getProperty(key);

}

/** 
獲取所有屬性，返回一個map,不常用 
可以試試props.putAll(t) 
*/

public Map getAllProperty(){

 Map map=new HashMap();

 Enumeration enu = props.propertyNames();

 while (enu.hasMoreElements()) {  
 String key = (String) enu.nextElement();  
 String value = props.getProperty(key);  
 map.put(key, value);  

 }

 return map;

}

/** 
在控制臺上打印出所有屬性，調試時用。 
*/

public void printProperties(){

 props.list(System.out);

}

/** 
寫入properties信息 
*/

public void writeProperties(String key, String value) {

 try {

 OutputStream fos = new FileOutputStream(new File(uri));  
 props.setProperty(key, value);  
 // 將此 Properties 表中的屬性列表（鍵和元素對）寫入輸出流  
 props.store(fos, "『comments』Update key：" + key);  

 } catch (Exception e) {

 e.printStackTrace();
 }

}

public static void main(String[] args) {

 PropertiesUtil util=new PropertiesUtil("src/dbConfig.properties");

 util.writeProperties("dbtype", "MSSQL");

}

}  </pre>