java读取文本文件

很久没用都忘记了，记录一下：

public static String readFileContent(String fileName) {
    File file = new File(fileName);
    BufferedReader reader = null;
    StringBuilder builder = new StringBuilder();
    try {
        reader = new BufferedReader(new FileReader(file));
        String tempStr;
        while ((tempStr = reader.readLine()) != null) {
            builder.append(tempStr);
        }
        reader.close();
        return builder.toString();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
    }
    return builder.toString();
}