常见的几种读取.properties文件的方式
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2022-06-25 14:18:25
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常见的几种读取.properties文件的方式
1、使用java.util.Properties类的load()方法 示例:
- InputStream in = lnew BufferedInputStream(new FileInputStream(name));
- Properties p = new Properties();
- p.load(in);
InputStream in = lnew BufferedInputStream(new FileInputStream(name)); Properties p = new Properties(); p.load(in);
2、使用java.util.ResourceBundle类的getBundle()方法
示例:
- ResourceBundle rb = ResourceBundle.getBundle(name, Locale.getDefault());
ResourceBundle rb = ResourceBundle.getBundle(name, Locale.getDefault());
用ResourceBundle读取.properties文件可避免路径问题
我在jar里读取.properties文件时,总是找不到文件路径,后来用ResourceBundle读取.properties文件即可避免路径问题,代码如下:
//process为文件名,切记不要加 .properties, URL是文件里的键名
- ResourceBundle bundle = ResourceBundle.getBundle("com.ihandy.smsoc.app.process");
- String s = bundle.getString("URL");
- System.out.println(s);
- pURL = s;
ResourceBundle bundle = ResourceBundle.getBundle("com.ihandy.smsoc.app.process"); String s = bundle.getString("URL"); System.out.println(s); pURL = s;
3、使用java.util.PropertyResourceBundle类的构造函数
示例:
- InputStream in = new BufferedInputStream(new FileInputStream(name));
- ResourceBundle rb = new PropertyResourceBundle(in);
InputStream in = new BufferedInputStream(new FileInputStream(name)); ResourceBundle rb = new PropertyResourceBundle(in);
4、使用class变量的getResourceAsStream()方法
示例:
- InputStream in = 类名.class.getResourceAsStream(name);
- Properties p = new Properties();
- p.load(in);
InputStream in = 类名.class.getResourceAsStream(name); Properties p = new Properties(); p.load(in);
5、使用class.getClassLoader()所得到的java.lang.ClassLoader的getResourceAsStream()方法 示例:
- InputStream in = 类名.class.getClassLoader().getResourceAsStream(name);
- Properties p = new Properties();
- p.load(in);
InputStream in = 类名.class.getClassLoader().getResourceAsStream(name); Properties p = new Properties(); p.load(in);
6、使用java.lang.ClassLoader类的getSystemResourceAsStream()静态方法 示例:
- InputStream in = ClassLoader.getSystemResourceAsStream(name);
- Properties p = new Properties();
- p.load(in);
InputStream in = ClassLoader.getSystemResourceAsStream(name); Properties p = new Properties(); p.load(in);
7、Servlet中可以使用javax.servlet.ServletContext的getResourceAsStream()方法 示例:
- InputStream in = context.getResourceAsStream(path);
- Properties p = new Properties();
- p.load(in);