7种方法获取Properties的值软件开发

7种方法获取Properties的值软件开发

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import org.apache.commons.beanutils.locale.LocaleBeanUtils;
import com.sun.jmx.defaults.JmxProperties;
public class PropertiesUtil {
    //  1。使用java.util.Properties 类的load()方法 
    //  示例： 
    public static Properties getProperties_1(String url) throws IOException {
       InputStream in = new BufferedInputStream(new FileInputStream(url)); 
       Properties p = new Properties (); 
       p.load(in); 
       return p;
    }

    //  2。使用java.util.ResourceBundle类的getBundle()方法 
    //  示例：
    public static ResourceBundle getProperties_2(String url) {
       ResourceBundle rb = ResourceBundle.getBundle(url, LocaleBeanUtils.getDefaultLocale()); 
       return rb;
       //rb.getString(key)
    }

    //  3。使用java.util.PropertyResourceBundle类的构造函数 
    //  示例： 
    public static ResourceBundle getProperties_3(String url) throws IOException {
       InputStream in = new BufferedInputStream(new FileInputStream(url)); 
       ResourceBundle rb = new PropertyResourceBundle(in); 
       return rb;
    }
 

    //  4。使用class变量的getResourceAsStream()方法 
    //  示例： 
    public static Properties getProperties_4(String url) throws IOException {
       InputStream in = JmxProperties.class.getResourceAsStream(url); 
       Properties p = new Properties (); 
       p.load(in);
       return p;
    }

    //  5。使用class.getClassLoader()所得到的java.lang.ClassLoader的getResourceAsStream()方法 
    //  示例： 
    public static Properties getProperties_5(String url) throws IOException {
       InputStream in = JmxProperties.class.getClassLoader().getResourceAsStream(url); 
       Properties p = new Properties (); 
       p.load(in); 
       return p;
    }

    //  6。使用java.lang.ClassLoader类的getSystemResourceAsStream()静态方法 
    //  示例： 
    public static Properties getProperties_6(String url) throws IOException {
       InputStream in = ClassLoader.getSystemResourceAsStream(url); 
       Properties p = new Properties (); 
       p.load(in); 
       return p;
    }

    //  
    //  补充 
    //  Servlet中可以使用javax.servlet.ServletContext的getResourceAsStream()方法 
    //  示例：
    //  public static Properties getProperties_8(String url) {
    //  InputStream in = context.getResourceAsStream(url); 
    //  Properties p = new Properties (); 
    //  p.load(in); 
    //  }
    public static void main(String[] args) throws IOException {
       System.out.println(getProperties_1(""));
    }
}

转自: http://yhjhappy234.blog.163.com/blog/static/316328322010948341667/