java 读取 property 属性文件的代码

import java.io.FileInputStream;
import java.util.Properties;
public class LoadPropertiesTest {
    private Properties prop = null;
    LoadPropertiesTest() {
        prop = new Properties();
    }
    public void load(String path) {
        FileInputStream stream = null;
        try {
            stream = new FileInputStream(path);
            prop.load(stream);
            stream.close();
            stream = null;
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public String getProperty(String key) {
        return prop.getProperty(key);
    }
    
    public static void main(String args[]){
        LoadPropertiesTest imp = new LoadPropertiesTest();
        imp.load("100.properties");
        System.out.println(imp.getProperty("ip"));
        System.out.println(imp.getProperty("username"));
        System.out.println(imp.getProperty("password"));
        System.out.println(imp.getProperty("filename"));
    }
}