java 文本读取

public class FileReaderDemo {
    public static void main(String[] args) throws IOException {
        //创建一个文件读取流对象，和指定名称的文件相关联
        FileReader fr = new FileReader("demo.txt");
        int ch = 0;
        while ((ch=fr.read())!=-1){
            System.out.println((char)ch);
        }
        //第二种方式：通过字符数组读取
        System.out.println("-------");
        SecondReader();
    }

    public static void SecondReader() throws IOException {
        FileReader fr = new FileReader("demo.txt");
        //定义一个字符数组，用于存储读到字符
        //该reader(char[])返回读到的字符个数。
        char[] buf = new char[1024]; //2k
        int num = 0;
        while ((num=fr.read(buf))!=-1)
            System.out.print(new String(buf,0,num));
        fr.close();
    }

}