用Python做这类事情简直太爽了，重发一个老的代码，可指定网址下载里面的图片

# -*- coding: utf-8 -*-  
"""  
some function by metaphy,2007-04-03,copyleft  
version 0.2  
"""  
import urllib, httplib, urlparse  
import re  
import random  
  
"""judge url exists or not,by others"""  
def httpExists(url):  
    host, path = urlparse.urlsplit(url)[1:3]  
    if ':' in host:  
        # port specified, try to use it  
        host, port = host.split(':', 1)  
        try:  
            port = int(port)  
        except ValueError:  
            print 'invalid port number %r' % (port,)  
            return False  
    else:  
        # no port specified, use default port  
        port = None  
    try:  
        connection = httplib.HTTPConnection(host, port=port)  
        connection.request("HEAD", path)  
        resp = connection.getresponse( )  
        if resp.status == 200:       # normal 'found' status  
            found = True  
        elif resp.status == 302:     # recurse on temporary redirect  
            found = httpExists(urlparse.urljoin(url,resp.getheader('location', '')))  
        else:                        # everything else -> not found  
            print "Status %d %s : %s" % (resp.status, resp.reason, url)  
            found = False  
    except Exception, e:  
        print e.__class__, e, url  
        found = False  
    return found  
  
"""get html src,return lines[]"""  
def gGetHtmlLines(url):  
    if url==None : return  
    if not httpExists(url): return   
    try:  
        page = urllib.urlopen(url)     
        html = page.readlines()  
        page.close()  
        return html  
    except:  
        print "gGetHtmlLines() error!"  
        return  
"""get html src,return string"""  
def gGetHtml(url):  
    if url==None : return  
    if not httpExists(url): return   
    try:  
        page = urllib.urlopen(url)     
        html = page.read()  
        page.close()  
        return html  
    except:  
        print "gGetHtml() error!"  
        return  
  
"""根据url获取文件名"""  
def gGetFileName(url):  
    if url==None: return None  
    if url=="" : return ""  
    arr=url.split("/")  
    return arr[len(arr)-1]  
  
"""生成随机文件名"""  
def gRandFilename(type):  
    fname = ''  
    for i in range(16):  
        fname = fname + chr(random.randint(65,90))  
        fname = fname + chr(random.randint(48,57))  
    return fname + '.' + type  
"""根据url和其上的link，得到link的绝对地址"""  
def gGetAbslLink(url,link):  
    if url==None or link == None : return   
    if url=='' or link=='' : return url   
    addr = ''   
    if link[0] == '/' :   
        addr = gGetHttpAddr(url) + link   
    elif len(link)>3 and link[0:4] == 'http':  
        addr =  link   
    elif len(link)>2 and link[0:2] == '..':  
        addr = gGetHttpAddrFatherAssign(url,link)  
    else:  
        addr = gGetHttpAddrFather(url) + link   
  
    return addr   
  
"""根据输入的lines，匹配正则表达式，返回list"""  
def gGetRegList(linesList,regx):  
    if linesList==None : return   
    rtnList=[]  
    for line in linesList:  
        matchs = re.search(regx, line, re.IGNORECASE)  
        if matchs!=None:  
            allGroups = matchs.groups()  
            for foundStr in allGroups:  
                if foundStr not in rtnList:  
                    rtnList.append(foundStr)  
    return rtnList  
"""根据url下载文件，文件名参数指定"""  
def gDownloadWithFilename(url,savePath,file):  
    #参数检查，现忽略  
    try:  
        urlopen=urllib.URLopener()  
        fp = urlopen.open(url)  
        data = fp.read()  
        fp.close()  
        file=open(savePath + file,'w+b')  
        file.write(data)  
        file.close()  
    except IOError:  
        print "download error!"+ url  
          
"""根据url下载文件，文件名自动从url获取"""  
def gDownload(url,savePath):  
    #参数检查，现忽略  
    fileName = gGetFileName(url)  
    #fileName =gRandFilename('jpg')  
    gDownloadWithFilename(url,savePath,fileName)  
          
"""根据某网页的url,下载该网页的jpg"""  
def gDownloadHtmlJpg(downloadUrl,savePath):  
    lines= gGetHtmlLines(downloadUrl)  
    regx = r"""src\s*="?(\S+)\.jpg"""  
    lists =gGetRegList(lines,regx)  
    if lists==None: return   
    for jpg in lists:  
        jpg = gGetAbslLink(downloadUrl,jpg) + '.jpg'  
        gDownload(jpg,savePath)  
   ###     print gGetFileName(jpg)  
"""根据url取主站地址"""  
def gGetHttpAddr(url):  
    if url== '' : return ''  
    arr=url.split("/")  
    return arr[0]+"//"+arr[2]  
"""根据url取上级目录"""  
def gGetHttpAddrFather(url):  
    if url=='' : return ''  
    arr=url.split("/")  
    addr = arr[0]+'//'+arr[2]+ '/'  
    if len(arr)-1>3 :  
        for i in range(3,len(arr)-1):  
            addr = addr + arr[i] + '/'  
    return addr  
  
"""根据url和上级的link取link的绝对地址"""  
def gGetHttpAddrFatherAssign(url,link):  
    if url=='' : return ''  
    if link=='': return ''  
    linkArray=link.split("/")  
    urlArray = url.split("/")  
    partLink =''  
    partUrl = ''  
    for i in range(len(linkArray)):          
        if linkArray[i]=='..':   
            numOfFather = i + 1    #上级数  
        else:  
            partLink = partLink + '/'  + linkArray[i]  
    for i in range(len(urlArray)-1-numOfFather):  
        partUrl = partUrl + urlArray[i]   
        if i < len(urlArray)-1-numOfFather -1 :   
            partUrl = partUrl + '/'  
    return  partUrl + partLink  
  
"""根据url获取其上的相关htm、html链接，返回list"""  
def gGetHtmlLink(url):  
    #参数检查，现忽略  
    rtnList=[]  
    lines=gGetHtmlLines(url)  
    regx = r"""href="?(\S+)\.htm"""  
    for link in gGetRegList(lines,regx):  
        link = gGetAbslLink(url,link) + '.htm'  
        if link not in rtnList:  
            rtnList.append(link)  
            print link  
    return rtnList  
  
"""根据url，抓取其上的jpg和其链接htm上的jpg"""  
def gDownloadAllJpg(url,savePath):  
    #参数检查，现忽略  
    gDownloadHtmlJpg(url,savePath)  
    #抓取link上的jpg  
    links=gGetHtmlLink(url)  
    for link in links:  
        gDownloadHtmlJpg(link,savePath)  
  
"""test"""  
def test():  
    u='http://www.gs.xinhuanet.com/news/2007-01/31/content_9188207_1.htm'  
    save='d:/tmp/'  
    print 'download pic from [' + u +']'  
    print 'save to [' +save+'] ...'  
    gDownloadHtmlJpg(u,save)  
    print "download finished"  
      
test()