读取文件

public String readData(String url) {
//     String url = "C:/data.txt";
    StringBuffer sb = new StringBuffer();
    try {
         FileReader read = new FileReader(new File(url));
         BufferedReader br=new BufferedReader(read);
         String line;
         while((line=br.readLine())!=null){
            sb.append(line);
            sb.append("\n");
          }
          System.out.print("data="+sb.toString());
     } catch (FileNotFoundException e) {
          e.printStackTrace();
     } catch (IOException e) {
        e.printStackTrace();
     }
     return sb.toString();
}