java_Properties写入文件

package ming;

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

public class PropertiesTest {

	/**
	 * @param args
	 * @throws IOException
	 * @throws FileNotFoundException
	 */
	public static void main(String[] args) throws FileNotFoundException, IOException {
		// TODO Auto-generated method stub
		Properties props = new Properties();
		//向Properties添加属性
		props.setProperty("username", "abc");
		props.setProperty("password", "123");
		//保存到a.ini文件中
		props.store(new FileOutputStream("a.ini"), "comment line");
		//追加数据
		Properties props2 = new Properties();
		props2.setProperty("gender", "male");
		props2.load(new FileInputStream("a.ini"));
		System.out.println(props2);

	}

}