在Java中是否有一个FileReader对应于一个URL？

Question

请考虑以下事项。

val br = new BufferedReader(new FileReader(inputFileName)) 

但是不是文件，我想直接从网上读取文件，即从ftp或http读取文件。那么，从URL中读取什么呢？

Answer 1

这是URLConnection。

下面是Java文档的例子：Reading from and Writing to a URLConnection：

import java.net.*; 
import java.io.*; 

public class URLConnectionReader { 
    public static void main(String[] args) throws Exception { 
     URL oracle = new URL("http://www.oracle.com/"); 
     URLConnection yc = oracle.openConnection(); 
     BufferedReader in = new BufferedReader(new InputStreamReader(
            yc.getInputStream())); 
     String inputLine; 
     while ((inputLine = in.readLine()) != null) 
      System.out.println(inputLine); 
     in.close(); 
    } 
} 

Answer 2

可以使用的java.io.InputStream

进口java.net。 ; import java.io.;

public class URLConnectionReader { 
    public static void main(String[] args) throws Exception { 
     URL oracle = new URL("http://www.oracle.com/"); 
     URLConnection yc = oracle.openConnection(); 
     BufferedReader in = new BufferedReader(new InputStreamReader(
            yc.getInputStream())); 
     String inputLine; 
     while ((inputLine = in.readLine()) != null) 
      System.out.println(inputLine); 
     in.close(); 
    } 
} 

更多信息请参见Reading Directly from a URL