解决eclipse中java项目导出成jar包后读写UTF-8文件中文乱码问题
最近遇到了一个小麻烦，就是在eclipse环境中读写UTF-8格式的txt文件时很正常，但是当导出成jar包后，通过点击来读写文件时出现了部分中文乱码问题。解决办法：
开始时用的是FileReader和FileWriter来读写的，后来改成用InputStreamReader和OutputStreamWriter后问题解决
关键代码：
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BufferedReader reader;
BufferedWriter writer;
//reader = new BufferedReader(new FileReader(new File(filedir,filename)));
reader = new BufferedReader(new InputStreamReader(new FileInputStream(new File(filedir,filename)),"UTF-8"));
//writer = new BufferedWriter(new FileWriter(new File(filedir,emailDomain+".txt"),true));
writer = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(new File(filedir,emailDomain+".txt"),true),"UTF-8"));
（PS：不用管代码中的具体文件路径和文件名，看懂思路即可）
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