Java读写txt文件中文乱码问题
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问题：在用Java程序进行读写含中文的txt文件时，经常会出现读出或写入的内容会出现乱码。原因其实很简单，就是系统的编码和程序的编码采用了不同的编码格式。通常，假如自己不修改的话，windows自身采用的编码格式是gbk(而gbk和gb2312基本上是一样的编码方式),而IDE中Encode不修改的话，默认是utf-8的编码，这就是为什么会出现乱码的原因。当在OS下手工创建并写入的txt文件（gbk），用程序直接去读（utf-8），就会乱码。为了避免可能的中文乱码问题，最好在文件写入和读出的时候显式指定编码格式。
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1、写文件：
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? public?static?void?writeFile(String?fileName,?String?fileContent)???
?? {?????
???try???
?????{??????
?????????File?f?=?new?File(fileName);??????
??????????if?(!f.exists())???
???????????{???????
??????????????f.createNewFile();??????
??????????}??????
??????????OutputStreamWriter?write?=?new?OutputStreamWriter(new?FileOutputStream(f),"gbk");??????
???????BufferedWriter?writer=new?BufferedWriter(write);??????????
??????????writer.write(fileContent);??????
??????????writer.close();?????
??????}?catch?(Exception?e)???
??????{??????
?????????e.printStackTrace();?????
??????}??
? }??
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public static void writeFile(String fileName, String fileContent)
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{??
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? try
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2、读文件：
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?? public?static?String?readFile(String?fileName)?
? {
???????String?fileContent?=?"";???
???????try??
????{???????
???????????File?f?=?new?File(fileName);??????
???????????if(f.isFile()&&f.exists())??
??????????{???????
???????????????InputStreamReader?read?=?new?InputStreamReader(new?FileInputStream(f),"gbk");???????
??????????????BufferedReader?reader=new?BufferedReader(read);???????
?????????????String?line;???????
??????????????while?((line?=?reader.readLine())?!=?null)???
??????????????{????????
??????????????????fileContent?+=?line;???????
??????????????}?????????
?????????????read.close();??????
?????????}?????
?????}?catch?(Exception?e)???
???{?????????
?????????e.printStackTrace();?????
?????}?????
????return?fileContent;???
?}???
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? public static String readFile(String fileName)
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? {??
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?? String fileContent = "";??
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? ??? try
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? ??? ? File f = new File(fileName);???
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? ??? ? if(f.isFile()&&f.exists())
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? ??? ? {????
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? ??? ?? InputStreamReader read = new InputStreamReader(new FileInputStream(f),"gbk");????
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? ??? ?? BufferedReader reader=new BufferedReader(read);????
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? ??? ?? String line;????
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? ??? ?? while ((line = reader.readLine()) != null)
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? ??? ?? {?????
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? ??? ???? fileContent += line;????
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? ??? ?? }??????
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? ??? ?? read.close();???
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? ??? ? }??
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? ??? } catch (Exception e)
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? ??? {??????
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? ??? ? e.printStackTrace();??
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? ??? }??
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? ??? return fileContent;
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? }
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