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java爬蟲與python爬蟲對比
fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
java爬蟲與python爬蟲的對比：fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
python做爬蟲語法更簡單，代碼更簡潔。java的語法比python嚴格，而且代碼也更復雜fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
示例如下：fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
url請求：
fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
java版的代碼如下：fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
public String call (String url){ String content = ""; BufferedReader in = null; try{ URL realUrl = new URL(url); URLConnection connection = realUrl.openConnection(); connection.connect(); in = new BufferedReader(new InputStreamReader(connection.getInputStream(),"gbk")); String line ; while ((line = in.readLine()) != null){ content += line + " "; } }catch (Exception e){ e.printStackTrace(); } finally{ try{ if (in != null){ in.close(); } }catch(Exception e2){ e2.printStackTrace(); } } return content; }python版的代碼如下：fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
# coding=utf-8 import chardet import urllib2 url = "http://www.baidu.com" data = (urllib2.urlopen(url)).read() charset = chardet.detect(data) code = charset['encoding'] content = str(data).decode(code, 'ignore').encode('utf8') print content正則表達式fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
java版的代碼如下：fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
public String call(String content) throws Exception { Pattern p = Pattern.compile("content":".*?""); Matcher match = p.matcher(content); StringBuilder sb = new StringBuilder(); String tmp; while (match.find()){ tmp = match.group(); tmp = tmp.replaceAll(""", ""); tmp = tmp.replace("content:", ""); tmp = tmp.replaceAll("<.*>", ""); sb.append(tmp + " "); } String comment = sb.toString(); return comment; } }python的代碼如下：fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
import repattern = re.compile(正則) group = pattern.findall(字符串)更多Python知識，請關注：Python自學網(wǎng)！！fN9少兒編程網(wǎng)-Scratch_Python_教程_免費兒童編程學習平臺
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