java读写html文件乱码解决方法

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+"
";
    }  
    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。