java中properties集合继承HashTable，load

Posted 2022-11-25 weixin_ancenhw

properties可以将集合中的方法store，持久化到硬盘中存储，
load加载数据
主要用于数据流当中

public class FileStream 
    public static void main(String[] args) 
        Properties properties = new Properties();
        properties.setProperty("a","ancen");
        properties.setProperty("b", "bance");
        //遍历数据
        Set<String> set = properties.stringPropertyNames();
        for (String s : set) 
            System.out.println(properties.getProperty(s));
        



    

字节流的输入写入操作

public class FileStream 
    public static void main(String[] args) throws IOException 
        Properties properties = new Properties();
        properties.setProperty("a","ancen");
        properties.setProperty("b", "test1");
        properties.setProperty("c", "test2");

        //输出流
        FileWriter fw=new FileWriter("test02.txt");
        properties.store(fw,"注解说明");
        fw.close();



    

读取加载文件流数据

//读取字符流
public class FileStream 
    public static void main(String[] args) throws IOException 
        Properties properties = new Properties();
        properties.load(new FileReader("test02.txt"));
        Set<String> set = properties.stringPropertyNames();
        for (String s : set) 
            System.out.println(s+":"+properties.getProperty(s));