java 读取文件中指定内容

public static void readWantedText(String url, String wanted) {
    try {
        FileReader fr = new FileReader(url);
        BufferedReader br = new BufferedReader(fr);
        String temp = "";// 用于临时保存每次读取的内容
        while (temp != null) {
            temp = br.readLine();
            if (temp != null && temp.contains(wanted)) {
                System.out.println(temp);
            }
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

public static void main(String[] args) {
    readWantedText("D:\\新建文件夹\\1.txt", "#");
}