Java读取Properties文件的六种方法

 

使用J2SE API读取Properties文件的六种方法

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);

2。使用java.util.ResourceBundle类的getBundle()方法
示例： ResourceBundle rb = ResourceBundle.getBundle(name, Locale.getDefault());

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);

4。使用class变量的getResourceAsStream()方法
示例： InputStream in = JProperties.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 = JProperties.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);

补充

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);

 

import java.util.Properties;
import java.io.InputStream;
import java.io.IOException;


public final class TestProperties {
    private static String param1;
    private static String param2;

    static {
        Properties prop = new Properties();
        InputStream in = Object.class.getResourceAsStream("/test.properties");
        try {
            prop.load(in);
            param1 = prop.getProperty("initYears1").trim();
            param2 = prop.getProperty("initYears2").trim();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    
    private TestProperties() {
    }

    public static String getParam1() {
        return param1;
    }

    public static String getParam2() {
        return param2;
    }

    public static void main(String args[]){
        System.out.println(getParam1());
        System.out.println(getParam2());
    }
}