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package com.lovo.cunwenjian;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.Properties;

import java.util.Set;

public class Cunwenjian {

 public static void main(String[] args) {  

 // TODO Auto-generated method stub

  Properties props = new Properties();

  props.setProperty("NOT1", "娜娜");

  props.setProperty("NOT2", "二硕");

  props.setProperty("NOT3", "贤贤");

  props.setProperty("NOT4", "歌哥");

  props.setProperty("NOT5", "欧巴");

  System.out.println(props.size());  

 System.out.println("================================");

  Set allkey = props.keySet();

  for (Object key : allkey) {

   System.out.println(key);

   System.out.println("================================");

  }

  System.out.println(props.getProperty("NOT1"));

  System.out.println("================================");     

      try {    props.store(new FileOutputStream("data.properties"), null);

  } catch (FileNotFoundException e) {  

  // TODO Auto-generated catch block

   e.printStackTrace();

  } catch (IOException e) {  

 // TODO Auto-generated catch block

   e.printStackTrace();

  }

 }      

 }

存文件

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原文地址：http://www.cnblogs.com/-xhx/p/5598836.html