/**

* 类名：PropertiesUtil

* 功能：提供对properties配置文件的读取和写入

* @author ChengTao

*/

package com.xy.xyd.rest.biz.service.impl;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.util.Properties;

public class PropertiesUtil {

/**

* 根据key值查找配置文件里的值

* @param key

* @return

*/

public String getProperty(String key){

      Properties prop = new Properties();

      // URL resource = Thread.currentThread().getContextClassLoader().getResource("");

      InputStream resourceAsStream =

                Thread.currentThread().getContextClassLoader().getResourceAsStream("properties/development/Parameter_xyd.properties");

      try {

            prop.load(resourceAsStream);

            prop.getProperty(key);

      } catch (FileNotFoundException e) {

            e.printStackTrace();

     } catch (IOException e) {

            e.printStackTrace();

      }

     return prop.getProperty(key);

}

/**

* 将文件加载到内存中，在内存中修改key对应的value值，再将文件保存 getFile

* @throws Exception

*/

public void setProper(String key,String value){

      Properties prop = new Properties();

      File file       new File(Thread.currentThread().getContextClassLoader().getResource("properties/development/Parameter_xyd.properties").getFile());      try {

          prop.setProperty(key, value);

          FileOutputStream fos = new FileOutputStream(file);

          prop.store(fos, null);

          fos.close();

     } catch (FileNotFoundException e) {

         e.printStackTrace();

     } catch (IOException e) {

         e.printStackTrace();

      }

}

//inputStream转outputStream

public ByteArrayOutputStream parse(InputStream in) throws Exception{

          ByteArrayOutputStream swapStream = new ByteArrayOutputStream();

          int ch;

          while ((ch = in.read()) != -1) {

              swapStream.write(ch);

          }

         return swapStream;

}

//outputStream转inputStream

public ByteArrayInputStream parse(OutputStream out) throws Exception{

         ByteArrayOutputStream baos=new ByteArrayOutputStream();

         baos=(ByteArrayOutputStream) out;

         ByteArrayInputStream swapStream = new ByteArrayInputStream(baos.toByteArray());

         return swapStream;

 }

}