Properties案例

package suanfahaonan;

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

public class TestProtect {

    public static void main(String[] args) throws Exception {
    //创建一个属性类
        Properties p=new Properties();
    p.setProperty("up", "w");
    p.setProperty("down", "s");    
    p.setProperty("left", "a");    
    p.setProperty("right", "d");    
        
        
    //将Properties中的内容存储到文件中
    p.store(new FileWriter("d:/p.properties"), "very good");

    }

}

package suanfahaonan;

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Properties;

public class ReadPro {

    public static void main(String[] args) throws Exception, IOException {
    Properties p=new Properties();
    //从文件中读取数据，并存在P中
    p.load(new FileReader("d:/p.properties"));
    p.remove("left");//文件里移除不了
    p.setProperty("first", "we are fimalu");
    p.store(new FileWriter("d:/p.properties"), "hello world");
    
    System.out.println(p.getProperty("up"));

    }

}