java读取Properties文件及赋值

懒得整理了，直接复制我工程里的代码：

第一个读取文件的类可以直接复制，

不复制的话，在下面取值和赋值部分的代码new EmailProperRead(systemType).properties根据自己情况修改。

一、读取文件的类EmailProperRead（一个完整文件，可以直接复制使用）：

   
   
  
  
 
   
 
    
 
     
 
    
 
    
 
     
 
      package com.uniquedu.util; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      import java.io.File; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      import java.io.FileInputStream; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      import java.util.Properties; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      import javax.servlet.http.HttpServletRequest; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      import org.springframework.web.context.request.RequestContextHolder; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      import org.springframework.web.context.request.ServletRequestAttributes; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      public 
      class EmailProperRead { 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      public String iniPath = 
      "/WEB-INF/systemConfig.Properties"; 
      //文件路径 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      public Properties properties = 
      new Properties(); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      @SuppressWarnings( 
      "deprecation") 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      public EmailProperRead() throws Exception{ 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest(); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       iniPath = request.getRealPath( 
      "/")+iniPath; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       File file = 
      new File(iniPath); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      if(!file.exists()){ 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       file.createNewFile(); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       } 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.load( 
      new FileInputStream(iniPath)); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       } 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       } 
     
 
    
 
  
  
  
 
 

二、取值：

   
   
  
  
 
   
 
    
 
     
 
    
 
    
 
     

       Properties props = 
      new Properties(); 
      // 获取系统环境 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //获取邮箱配置信息 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      final Properties properties = 
      new EmailProperRead().properties; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //发送邮件时显示的发件人名称 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       String personalName = properties.getProperty( 
      "emailName"); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      // 发件人的邮箱用户名 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      final String usernames = properties.getProperty( 
      "emailAddress"); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      // 发件人的邮箱密码 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      final String passwords = properties.getProperty( 
      "emailPaswd"); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      // 邮箱服务器 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       String host = properties.getProperty( 
      "smtpAddress"); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //邮件主题 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       String mail_subject = properties.getProperty( 
      "emailTheme"); 
     
 
    
 
  
  
  
 
 

三、赋值并保存文件：

   
   
  
  
 
   
 
    
 
     
 
    
 
    
 
     

       Properties properties = 
      new EmailProperRead().properties; 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //发送邮件时显示的发件人名称 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.setProperty( 
      "emailName", request.getParameter( 
      "emailName")); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //发件人的邮箱地址 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.setProperty( 
      "emailAddress", request.getParameter( 
      "emailAddress")); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //发件人的邮箱密码 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.setProperty( 
      "emailPaswd", request.getParameter( 
      "emailPaswd")); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //邮箱服务器 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.setProperty( 
      "smtpAddress", request.getParameter( 
      "smtpAddress")); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     
 
      //邮件主题 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.setProperty( 
      "emailTheme", request.getParameter( 
      "emailTheme")); 
     
 
    
 
   
 
    
 
     
 
    
 
    
 
     

       properties.store( 
      new FileOutputStream( 
      new EmailProperRead(systemType).iniPath), 
      "");