java modify the properties file

package xml;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Properties;


public class PropertyUtil {

    public static void main(String[] args){
        String filePath="F:/aaa/xml/src/application.properties";
        File file=new File(filePath);
        Properties properties = new Properties();
        try {
            properties.load(new FileInputStream(file));
            properties.setProperty("authority.Name4","33dddd33");
            FileOutputStream oFile = new FileOutputStream(filePath);//true表示追加打开
            properties.store(oFile, "The New properties file");
            oFile.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}