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(""
));

    }



}