1、JAVA读取文件，避免中文乱码。

/**  * 读取文件内容  *  * @param filePathAndName  *            String 如 c:\\1.txt 绝对路径  * @return boolean  */public static String readFile(String filePathAndName) {  String fileContent = "";  try {    File f = new File(filePathAndName);   if(f.isFile()&&f.exists()){    InputStreamReader read = new InputStreamReader(new FileInputStream(f),"UTF-8");    BufferedReader reader=new BufferedReader(read);    String line;    while ((line = reader.readLine()) != null) {     fileContent += line+"\n";    }      read.close();   }  } catch (Exception e) {   System.out.println("读取文件内容操作出错");   e.printStackTrace();  }  return fileContent;}

2、JAVA写入文件，避免中文乱码。

public static void writeFile(String filePathAndName, String fileContent) {  try {   File f = new File(filePathAndName);   if (!f.exists()) {    f.createNewFile();   }   OutputStreamWriter write = new OutputStreamWriter(new FileOutputStream(f),"UTF-8");   BufferedWriter writer=new BufferedWriter(write);     //PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(filePathAndName)));   //PrintWriter writer = new PrintWriter(new FileWriter(filePathAndName));   writer.write(fileContent);   writer.close();  } catch (Exception e) {   System.out.println("写文件内容操作出错");   e.printStackTrace();  }}

若写入的时候用

1、PrintWriter writer = new PrintWriter(new BufferedWriter(new FileWriter(filePathAndName)));

2、PrintWriter writer = new PrintWriter(new FileWriter(filePathAndName));

都会出现错误，不行。

p.s. 我刚开始用上述方法的时候还是出先乱码，后来发现是因为我的html文件的编码方式是不是utf-8,改成utf-8即可。

查看一个文件的编码方式，一个简单的办法是：用记事本打开它，然后另存为一个副本文件，在“另存为”的页面下方，“保存”按钮前面，如下图所示，会出现原文件的编码方式。

如果不是UTF-8，把它改成UTF-8，保存即可。

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