java 读取properties文件

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

public class GetProperties {
public static void main(String[] args) throws IOException {
Properties p = new Properties();
InputStream in = GetProperties.class
.getResourceAsStream("/config.properties");

p.load(in);
in.close();
System.out.println(p.getProperty("ip"));
}
}