java 获取文件流InputStream

以下是Java获取文件流InputStream的两种方法：

1. 使用FileInputStream类读取文件流

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class ReadFile {
    public static void main(String[] args) {
        try {
            InputStream inputStream = new FileInputStream("example.txt");
            int n;
            while ((n = inputStream.read()) != -1) {
                System.out.print((char) n);
            }
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2. 使用ClassLoader类获取文件流

import java.io.IOException;
import java.io.InputStream;

public class ReadFile {
    public static void main(String[] args) {
        try {
            InputStream inputStream = ReadFile.class.getClassLoader().getResourceAsStream("example.txt");
            int n;
            while ((n = inputStream.read()) != -1) {
                System.out.print((char) n);
            }
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}