java读取property文件数据

java读取property文件数据

import java.io.BufferedInputStream; 
   import java.io.FileInputStream; 
   import java.io.FileNotFoundException; 
   import java.io.IOException; 
   import java.io.InputStream; 
   import java.util.Enumeration; 
   import java.util.HashMap; 
   import java.util.Map; 
   import java.util.Properties; 
    
  . /**
  .  * 读取Properties综合类
  .  */ 
  . public class PropertiesUtil { 
       
       /**
        * 配置文件对象
        */ 
       private Properties props=null; 
       
       /**
        * 构造函数
        * @param fileName 配置文件名称
        */ 
       public PropertiesUtil(String fileName){ 
           String filePath=getPath(PropertiesUtil.class) + fileName; 
           props = new Properties(); 
           try { 
              InputStream in = new BufferedInputStream(new FileInputStream(filePath)); 
              props.load(in); 
             //关闭资源 
             in.close(); 
           } catch (FileNotFoundException e) { 
              e.printStackTrace(); 
           } catch (IOException e) { 
  .             e.printStackTrace(); 
           } 
       } 
       
       /**
        * 根据key值读取配置的值
        * @param key key值
        * @return key 键对应的值
        * @throws IOException
        */ 
       public String readValue(String key) throws IOException { 
           return  props.getProperty(key); 
       } 
       
       /**
       * 读取properties的全部信息     
        * @throws FileNotFoundException 配置文件没有找到
        * @throws IOException 关闭资源文件，或者加载配置文件错误
        *
        */ 
       public Map<String,String> readAllProperties() throws FileNotFoundException,IOException  { 
          //保存所有的键值 
           Map<String,String> map=new HashMap<String,String>(); 
           Enumeration en = props.propertyNames(); 
           while (en.hasMoreElements()) { 
               String key = (String) en.nextElement(); 
               String Property = props.getProperty(key); 
              map.put(key, Property); 
           } 
           return map; 
       } 
    
       /**
        * 得到某一个类的路径
        * @param name
        * @return
        */ 
       private String getPath(Class name) { 
           String strResult = null; 
           if (System.getProperty("os.name").toLowerCase().indexOf("window") > -1) { 
              strResult = name.getResource("/").toString().replace("file:/", "") 
                       .replace("%20", " "); 
           } else { 
               strResult = name.getResource("/").toString().replace("file:", "") 
                      .replace("%20", " "); 
          } 
          return strResult; 
      } 
  }