package com.dhb.file;

 import java.io.FileNotFoundException;

 import java.io.FileReader;

 import java.io.FileWriter;

 import java.io.IOException;

 import java.util.Map.Entry;

 import java.util.Properties;

 import java.util.Set;

 /**

  * @author DSHORE / 2018-7-18

  *

  */

 public class Demo24 {

     public static void main(String[] args) throws Exception {

         //createProperties();

         readProperties();

     }

     //读取配置文件的信息

     public static void readProperties() throws Exception, IOException{

         //创建Properties对象

         Properties properties=new Properties();

         //加载配置文件信息到Properties里面

         properties.load(new FileReader("F:\\person.properties"));

         //遍历

         /*Set<Entry<Object,Object>> entrys=properties.entrySet();

         for (Entry<Object, Object> entry : entrys) {

             System.out.println("键："+entry.getKey()+"，值："+entry.getValue());

             //修改密码

             //把修改后的properties在生成一个配置文件

             properties.setProperty("李四","001");

             properties.store(new FileWriter("F:\\person.properties"), "This is QQ account and password properties");

         }*/

         //修改密码

         //把修改后的properties在生成一个配置文件

         properties.setProperty("李四","");

         properties.store(new FileWriter("F:\\person.properties"), "This is QQ account and password properties");

     }

     //创建配置文件

     public static void createProperties() throws FileNotFoundException, IOException{

         //创建一个配置文件

         Properties properties=new Properties();

         properties.setProperty("张三", "");

         properties.setProperty("李四", "");

         properties.setProperty("王五","");

         //遍历Properties

         /*Set<Entry<Object,Object>> entrys=properties.entrySet();

         for (Entry<Object, Object> entry : entrys) {

             System.out.println("键："+entry.getKey()+"，值："+entry.getValue());

         }*/

         //使用Properties生产配置文件.

         //properties.store(new FileOutputStream("F:\\person.properties"), "hehe");//第一个参数是一个输出流对象,第二参数是描述这个配置文件的信息

         properties.store(new FileWriter("F:\\person.properties"), "This is QQ account and password properties");

     }

 }