Properties配置文件练习

package IO.file.test;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.Properties;
import java.util.Set;

public class PropertiesDemo {
    public static void main(String[] args) throws IOException {
        method_4();

    }
    private static void method_4() throws IOException {
        Properties pro = new Properties();
        BufferedReader bufr=new BufferedReader(new FileReader("a.txt"));
        String line=null;
        while((line=bufr.readLine())!=null)
        {
                if(line.startsWith("#"))
                            continue;
            String[] arr=line.split("=");
    //        System.out.println(arr[0]+" "+arr[1]);
            pro.setProperty(arr[0], arr[1]);
        }
        pro.list(System.out);
        bufr.close();
    }
    public static void method_3() throws IOException {
    Properties pro = new Properties();
    FileInputStream fis=new FileInputStream("a.txt");
    pro.load(fis);
    pro.list(System.out);
    }
     static void method_2() throws IOException
    {
        Properties pro = new Properties();
        pro.setProperty("zhangsan", "30");
        pro.setProperty("lisi", "32");
        pro.setProperty("maer", "34");
        pro.setProperty("mazi", "45");
        pro.setProperty("wangwu", "12");
        pro.store(new FileWriter("a.txt"), "name+age");
        //pro.store(new FileOutputStream("a.txt"), "name+age");
    }
    public static void method_1()
    {
        Properties pro = new Properties();
        pro.setProperty("zhangsan", "30");
        pro.setProperty("lisi", "32");
        pro.setProperty("maer", "34");
        pro.setProperty("mazi", "45");
        pro.setProperty("wangwu", "12");
        pro.list(System.out);
        System.out.println();
        pro = System.getProperties();
        System.out.println(pro);
        // 修改值
        /*
         * pro.setProperty("mazi", "22"); Set<String>
         * names=pro.stringPropertyNames(); for(String name:names){ String
         * value=pro.getProperty(name); System.out.println(name); }
         */
    }


}