java操作文件，不再为编码格式发愁

/**  
  * 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;   
}

/**  
  * 写入文件  
  *  
  * @param filePathAndName  
  *            String 如 c:\\1.txt 绝对路径  
  */   
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);     
        Writer.write(fileContent);   
        Writer.close();   
    } catch (Exception e) {   
        System.out.println("写文件内容操作出错");   
        e.printStackTrace();   
    }   
}