Java读取properties的几种方式

下面是java properties读取文件的几种方式

代码：

/*
* java properties读取文件的几种方式
* */
public class PropertiesTest {

    // 1.通过本类的类加载器的getResourceAsStream获取
    public Properties getByClassLoaderResourceAsStream(String filePath) throws IOException {
        Properties properties = new Properties();
        properties.load(new InputStreamReader(PropertiesTest.class.getClassLoader().getResourceAsStream(filePath)));
        return properties;
    }

    // 2.通过文件流进行读取
    public Properties getByFileInputStream(String filePath) throws IOException {
        Properties properties = new Properties();
        properties.load(new FileInputStream(new File(filePath)));
        return properties;
    }

    // 3.通过类加载器ClassLoader获取
    public Properties getByClassLoader(String filePath) throws IOException {
        Properties properties = new Properties();
        properties.load(ClassLoader.getSystemResourceAsStream(filePath));
        return properties;
    }

    // 4.通过URL来获取
    public Properties getByURL(String url) throws IOException {
        Properties properties = new Properties();
        properties.load(new URL(url).openStream());
        return properties;
    }
    
    // 使用
    public static void main(String[] args) {
        Properties properties = new Properties();
        String value = properties.getProperty("key");
        if(StringUtils.isEmpty(value)) {
            
        }
    }
    
}

参考：
https://blog.csdn.net/mhmyqn/article/details/7683909

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