Java实例——基于jsoup的简单爬虫实现（从智联获取工作信息）

　　这几天在学习Java解析xml，突然想到Dom能不能解析html，结果试了半天行不通，然后就去查了一些资料，发现很多人都在用Jsoup解析html文件，然后研究了一下，写了一个简单的实例，感觉还有很多地方需要润色，在这里分享一下我的实例，欢迎交流指教！

　　后续想通过Java把数据导入到Excel或者生成一个报表！

 package gethtml;

 import java.io.IOException;
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
 import org.jsoup.select.Elements;

 /**从智联招聘获取招聘信息
  * @author syskey
  * @url 智联招聘网站链接（建议不要更改）
  * @city 搜索工作的城市
  * @keywrods 搜索工作的相关关键字
  */

 public class JsoupHtml {

     private String url="http://sou.zhaopin.com/jobs/searchresult.ashx?jl=";  //智联招聘网站
     private  String city="西安"; //搜索工作的城市
     private  String keywords="java";  //搜索工作的关键字
     public JsoupHtml(String city,String keywords){
         this.city=city;
         this.keywords =keywords;

     }

     public void getZhiLianWork(){
         try {
             for (int i=0;i<10;i++) {
                     System.out.println("*********开始遍历第"+(i+1)+"页的求职信息*********");
                     Document doc = Jsoup.connect(url+city+"&kw="+keywords+"&p="+(i+1)+"&isadv=0").get();
                     Element content = doc.getElementById("newlist_list_content_table");
                     Elements zwmcEls = content.getElementsByClass("zwmc");
                     Elements gsmcEls = content.getElementsByClass("gsmc");
                     Elements zwyxEls = content.getElementsByClass("zwyx");
                     Elements gzddEls = content.getElementsByClass("gzdd");
                     Elements gxsjEls = content.getElementsByClass("gxsj");
                     for(int j = 0;j<zwmcEls .size();j++){

                         System.out.println(
                                 zwmcEls.get(j).tagName("a").text()+"*****"+gsmcEls.get(j).tagName("a").text()+
                                 "*****"+zwyxEls.get(j).tagName("a").text()+"*****"+gzddEls.get(j).tagName("a").text()+
                                 "*****"+gxsjEls.get(j).tagName("a").text());
                         System.out.println();
                 }
                     System.out.println("*********结束遍历第"+(i+1)+"页的求职信息*********");

             }

         } catch (IOException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
     }
     public static void main(String[] args) {    

         JsoupHtml jHtml = new JsoupHtml("上海", "java");
         jHtml.getZhiLianWork();

     }

 }

　　更新源代码，支持生成html表格：

package jsouphtml;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

public class JsoupHtml {

	public static void main(String[] args) {
		try {
			String url ="http://sou.zhaopin.com/jobs/searchresult.ashx?";
			String city ="西安";
			String keywords = "java";
			BufferedWriter bWriter = new BufferedWriter(
					new OutputStreamWriter(
							new FileOutputStream("output.html"),"utf-8"));
			bWriter.write("");

			File input = new File("input.html");
			Document doc2 = Jsoup.parse(input, "UTF-8",	"");
			Element table = doc2.getElementById("workinfo");
			table.text("");
			Element theader = table.appendElement("tr");
			theader.appendElement("th").text("序号");
			theader.appendElement("th").text("职位名称");
			theader.appendElement("th").text("公司名称");
			theader.appendElement("th").text("职位月薪");
			theader.appendElement("th").text("工作地点");
			theader.appendElement("th").text("发布日期");			

			for(int page=0;page<10;page++){
				Document doc = Jsoup.connect(url+city+"&kw="+keywords+"&p="+page).get();
				Element content = doc.getElementById("newlist_list_content_table");
				Elements zwmcEls = content.getElementsByClass("zwmc");
				Elements gsmcEls = content.getElementsByClass("gsmc");
				Elements zwyxEls = content.getElementsByClass("zwyx");
				Elements gzddEls = content.getElementsByClass("gzdd");
				Elements gxsjEls = content.getElementsByClass("gxsj");

				for(int i = 1;i<zwmcEls .size();i++){
					Element tr =table.appendElement("tr");
					tr.appendElement("td").text((page+1)+"-"+i);
					tr.appendElement("td").text(zwmcEls.get(i).tagName("a").text());
					tr.appendElement("td").text(gsmcEls.get(i).tagName("a").text());
					tr.appendElement("td").text(zwyxEls.get(i).tagName("a").text());
					tr.appendElement("td").text(gzddEls.get(i).tagName("a").text());
					tr.appendElement("td").text(gxsjEls.get(i).tagName("a").text());
				}
			}
			System.out.println(doc2.html());
			bWriter.write(doc2.html());
			bWriter.close();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}

　　output.html模板：

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>智联工作信息</title>
  <style>
  body{margin:0;padding:0;}
	.header{height:100px;width:100%;background:#39c;color:#fff;text-align:center;line-height:100px;font-size:40px;
		font-family:"微软雅黑";}
	.body{width:100%;background:#fff;}
	.body table{width:90%;margin:0 auto;color:#2e2e2e;border:1px solid #cad9ea; border-collapse: collapse; }
	.body table th,td{min-width:50px;max-width:300px;}
	.feeter{height:30px;width:100%;background:#39c;color:#fff;text-align:center;line-height:30px;font-size:14px;
		font-family:"微软雅黑";}
  </style>
 </head>
 <body>
	<div class="header">智联工作信息</div>
	<div class="body">
		<table class="work" border="1">
			<tbody id="workinfo">
			</tbody>
		</table>
	</div>
	<div class="feeter">版权所有 翻版必究@2017 sysker</div>
 </body>
</html>