pythonjava爬⾍_java爬⾍与python爬⾍对⽐
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){
String content = "";
BufferedReader in = null;
try{
URL realUrl = new URL(url);
URLConnection connection = realUrl.openConnection();
in = new BufferedReader(new InputStream(),"gbk"));
String line ;
while ((line = in.readLine()) != null){
content += line + "\n";
}
}catch (Exception e){
e.printStackTrace();
}
finally{
try{
if (in != null){
in.close();
}
}catch(Exception e2){
e2.printStackTrace();
}
}
return content;
}
java调用python模型python版的代码如下：# coding=utf-8
import chardet
import urllib2
url = "www.baidu"
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
java版的代码如下：public String call(String content) throws Exception { Pattern p = Patternpile("content\":\".*?\"");
Matcher match = p.matcher(content);
StringBuilder sb = new StringBuilder();
String tmp;
while (match.find()){
tmp = up();
tmp = placeAll("\"", "");
tmp = place("content:", "");
tmp = placeAll("<.>", "");
sb.append(tmp + "\n");
}
String comment = sb.toString();
return comment;
}
}
python的代码如下：import repattern = repile(正则)
group = pattern.findall(字符串)
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