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java爬虫与python爬虫对比
极客小将2020-12-29-
简介java爬虫与python爬虫的对比:python做爬虫语法更简单,代码更简洁。java的语法比python严格,而且代码也更复杂示例如下:url请求:java版的代码如下:public String call (String url){  
fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
java爬虫与python爬虫的对比:fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
python做爬虫语法更简单,代码更简洁。java的语法比python严格,而且代码也更复杂fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
示例如下:fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
url请求:
fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
java版的代码如下:fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
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版的代码如下:fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
# 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正则表达式fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
java版的代码如下:fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
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的代码如下:fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台
import repattern = re.compile(正则) group = pattern.findall(字符串)更多Python知识,请关注:Python自学网!!fN9少儿编程网-Scratch_Python_教程_免费儿童编程学习平台