本文提供了一个使用Java进行网络文件下载的示例代码。通过建立HTTP连接并利用输入输出流，该示例展示了如何从远程服务器下载图片到本地文件系统。
1
package word;
2
3import java.io.FileOutputStream;
4import java.io.InputStream;
5import java.net.HttpURLConnection;
6
7
public class FileRead 
{
8
9
public static void main(String[] args) {
10 java.net.URL urlfile = null;
11 HttpURLConnection httpUrl = null;
12
13 try {
14
15 // 连接指定的网络资源,获取网络输入流
16 urlfile = new java.net.URL(
17 "http://10.142.202.12/ftp/Y0131000000168/D0011000006537.jpg");
18 httpUrl = (HttpURLConnection) urlfile.openConnection();
19 httpUrl.connect();
20 int bytesum = 0;
21 int byteread = 0;
22 InputStream inStream = httpUrl.getInputStream();
23 FileOutputStream fs = new FileOutputStream("c:/1.jpg");
24 byte[] buffer = new byte[1444];
25 while ((byteread = inStream.read(buffer)) != -1) {
26 bytesum += byteread;
27 fs.write(buffer, 0, byteread);
28
}
29
30 } catch (Exception e) {
31
32 }
33}
34
}
35
package word;2
3
import java.io.FileOutputStream;4
import java.io.InputStream;5
import java.net.HttpURLConnection;6
7
public class FileRead {8
9
public static void main(String[] args) {10
java.net.URL urlfile = null; 11
HttpURLConnection httpUrl = null; 12
13
try {14
15
// 连接指定的网络资源,获取网络输入流16
urlfile = new java.net.URL(17
"http://10.142.202.12/ftp/Y0131000000168/D0011000006537.jpg");18
httpUrl = (HttpURLConnection) urlfile.openConnection();19
httpUrl.connect();20
int bytesum = 0;21
int byteread = 0;22
InputStream inStream = httpUrl.getInputStream();23
FileOutputStream fs = new FileOutputStream("c:/1.jpg");24
byte[] buffer = new byte[1444];25
while ((byteread = inStream.read(buffer)) != -1) {26
bytesum += byteread;27
fs.write(buffer, 0, byteread);28
} 29
30
} catch (Exception e) {31
32
} 33
}34
}35
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