Struct2 csv文件上传读取中文内容乱码

FileInputStream  fis = null;
InputStreamReader isr = null;
BufferedReader br= null;
try {
    fis = new FileInputStream(file);
    isr = new InputStreamReader(fis,"gbk");
    br = new BufferedReader(isr);
    String line1 = null;  
    while ((line1 = br.readLine()) != null) {  
         System.out.println(line1);
    }  
      br.close();
         isr.close();
    fis.close();
    } catch (Exception e) {
        e.printStackTrace();
    }