我以前写的一个java程序,刚才又试了下,可以的:
/**
第二个将网页中所有图片保存到本地:
package 网页爬虫;
**/
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class GetImage {
/**
* @param args
*/
private List<String> imageUrl = new ArrayList<String>();//用于存储图片的url
private int count = 0;//图片计数器
public static void main(String[] args) {
String netUrl = "
http://www.qbhwx.com/product/category/?&page=13";//要爬的网页
//String netUrl = "
http://sejie.wanxun.org/post/2012-09-25/40039413449";
new GetImage().init(netUrl);
}
public void init(String netUrl)
{
getPage(netUrl);
while(imageUrl.size()!=0)
{
getImage(imageUrl.remove(0));
}
}
//获取网页信息line中的图片url并加入到集合中
public void getImageUrl(String line)
{
String regex = "src=\"
http://.{1,}.jpg";
Pattern pat = Pattern.compile(regex);
Matcher matcher=pat.matcher(line);
String str =null;
while(matcher.find())
{
str = matcher.group();
imageUrl.add(str.substring(5));
}
}
//爬取网页中的信息。
public void getPage(String netUrl)
{
BufferedReader mybr = null;
try {
URL myurl = new URL(netUrl);
URLConnection myconn = myurl.openConnection();
InputStream myin = myconn.getInputStream();
mybr = new BufferedReader(new InputStreamReader(myin,"UTF-8"));
String line;
while((line = mybr.readLine())!= null)
{
getImageUrl(line);//判断网页中的jpg图片
}
} catch (MalformedURLException e) {
System.out.println("url异常");
} catch (IOException e) {
System.out.println("url连接异常");
}finally
{
if( mybr != null)
{
try {
mybr.close();
} catch (IOException e) {
System.out.println("读入流关闭异常");
}
}
}
}
//下载该图片!
public void getImage(String imageUrl)
{
InputStream myin = null;
BufferedOutputStream myos = null;
try {
URL myurl = new URL(imageUrl);
URLConnection myconn = myurl.openConnection();
myin = myconn.getInputStream();
myos = new BufferedOutputStream(new FileOutputStream(count+".jpg"));
byte[] buff = new byte[1024];
int num = 0;
while((num = myin.read(buff))!= -1)
{
myos.write(buff, 0, num);
myos.flush();
}
count++;
} catch (MalformedURLException e) {
System.out.println("url异常");
} catch (IOException e) {
System.out.println("url连接异常");
}
finally
{
if( myin != null)
{
try {
myos.close();
} catch (IOException e) {
System.out.println("读入流关闭异常");
}
}
if( myos != null)
{
try {
myos.close();
} catch (IOException e) {
System.out.println("输出流关闭异常");
}
}
}
}
}