本篇文章为大家展示了使用java怎么爬取代理IP，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
<dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.28</version> </dependency> <dependency> <groupId>org.jsoup</groupId> <artifactId>jsoup</artifactId> <version>1.10.2</version> </dependency>
完整的代码如下：
package com.tuniu.fcm.facade.IPProxy;
import com.alibaba.fastjson.JSONObject;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 获取代理IP，需要
* com.alibaba.fastjson.JSONObject以及Jsoup
*/
public class ProxyCralwerUnusedVPN {
ThreadLocal<Integer> localWantedNumber = new ThreadLocal<Integer>();
ThreadLocal<List<ProxyInfo>> localProxyInfos = new ThreadLocal<List<ProxyInfo>>();
public static void main(String[] args) {
ProxyCralwerUnusedVPN proxyCrawler = new ProxyCralwerUnusedVPN();
/**
* 想要获取的代理IP个数，由需求方自行指定。（如果个数太多，将导致返回变慢）
*/
proxyCrawler.startCrawler(1);
}
/**
* 暴露给外部模块调用的入口
* @param wantedNumber 调用方期望获取到的代理IP个数
*/
public String startCrawler(int wantedNumber) {
localWantedNumber.set(wantedNumber);
kuaidailiCom("http://www.xicidaili.com/nn/", 15);
kuaidailiCom("http://www.xicidaili.com/nt/", 15);
kuaidailiCom("http://www.xicidaili.com/wt/", 15);
kuaidailiCom("http://www.kuaidaili.com/free/inha/", 15);
kuaidailiCom("http://www.kuaidaili.com/free/intr/", 15);
kuaidailiCom("http://www.kuaidaili.com/free/outtr/", 15);
/**
* 构造返回数据
*/
ProxyResponse response = new ProxyResponse();
response.setSuccess("true");
Map<String, Object> dataInfoMap = new HashMap<String, Object>();
dataInfoMap.put("numFound", localProxyInfos.get().size());
dataInfoMap.put("pageNum", 1);
dataInfoMap.put("proxy", localProxyInfos.get());
response.setData(dataInfoMap);
String responseString = JSONObject.toJSON(response).toString();
System.out.println(responseString);
return responseString;
}
private void kuaidailiCom(String baseUrl, int totalPage) {
String ipReg = "\\d{1,3}\\.\\d{1,3}\\.\\d{1,3}\\.\\d{1,3} \\d{1,6}";
Pattern ipPtn = Pattern.compile(ipReg);
for (int i = 1; i < totalPage; i++) {
if (getCurrentProxyNumber() >= localWantedNumber.get()) {
return;
}
try {
Document doc = Jsoup.connect(baseUrl + i + "/")
.header("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
.header("Accept-Encoding", "gzip, deflate, sdch")
.header("Accept-Language", "zh-CN,zh;q=0.8,en;q=0.6")
.header("Cache-Control", "max-age=0")
.header("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36")
.header("Cookie", "Hm_lvt_7ed65b1cc4b810e9fd37959c9bb51b31=1462812244; _gat=1; _ga=GA1.2.1061361785.1462812244")
.header("Host", "www.kuaidaili.com")
.header("Referer", "http://www.kuaidaili.com/free/outha/")
.timeout(30 * 1000)
.get();
Matcher m = ipPtn.matcher(doc.text());
while (m.find()) {
if (getCurrentProxyNumber() >= localWantedNumber.get()) {
break;
}
String[] strs = m.group().split(" ");
if (checkProxy(strs[0], Integer.parseInt(strs[1]))) {
System.out.println("获取到可用代理IP\t" + strs[0] + "\t" + strs[1]);
addProxy(strs[0], strs[1], "http");
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
private static boolean checkProxy(String ip, Integer port) {
try {
//http://1212.ip138.com/ic.asp 可以换成任何比较快的网页
Jsoup.connect("http://1212.ip138.com/ic.asp")
.timeout(2 * 1000)
.proxy(ip, port)
.get();
return true;
} catch (Exception e) {
return false;
}
}
private int getCurrentProxyNumber() {
List<ProxyInfo> proxyInfos = localProxyInfos.get();
if (proxyInfos == null) {
proxyInfos = new ArrayList<ProxyInfo>();
localProxyInfos.set(proxyInfos);
return 0;
}
else {
return proxyInfos.size();
}
}
private void addProxy(String ip, String port, String protocol){
List<ProxyInfo> proxyInfos = localProxyInfos.get();
if (proxyInfos == null) {
proxyInfos = new ArrayList<ProxyInfo>();
proxyInfos.add(new ProxyInfo(ip, port, protocol));
}
else {
proxyInfos.add(new ProxyInfo(ip, port, protocol));
}
}
}
class ProxyInfo {
private String userName = "";
private String ip;
private String password = "";
private String type;
private String port;
private int is_internet = 1;
public ProxyInfo(String ip, String port, String type) {
this.ip = ip;
this.type = type;
this.port = port;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getIp() {
return ip;
}
public void setIp(String ip) {
this.ip = ip;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getPort() {
return port;
}
public void setPort(String port) {
this.port = port;
}
public int getIs_internet() {
return is_internet;
}
public void setIs_internet(int is_internet) {
this.is_internet = is_internet;
}
}
class ProxyResponse {
private String success;
private Map<String, Object> data;
public String getSuccess() {
return success;
}
public void setSuccess(String success) {
this.success = success;
}
public Map<String, Object> getData() {
return data;
}
public void setData(Map<String, Object> data) {
this.data = data;
}
}上述内容就是使用java怎么爬取代理IP，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注亿速云行业资讯频道。
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