java 从网页httpswwwxhjcomershoufangyueluqu爬取至少100条二手房的信息 标题 面积 房型 地址 楼盘名 总价 单价 String double int数组 string String double double

您可以使用Java的网络爬虫技术来从指定网页上爬取数据。以下是一个简单的示例代码，用于从指定网页上爬取至少100条二手房的信息，并以对象流的形式存储：

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

import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class HouseCrawler {

    public static void main(String[] args) {
        String url = "https://www.xhj.com/ershoufang/yueluqu/";
        List<House> houses = crawlHouses(url);
        
        // 存储房屋信息
        saveHouses(houses);
    }

    public static List<House> crawlHouses(String url) {
        List<House> houses = new ArrayList<>();
        
        try {
            Document doc = Jsoup.connect(url).get();
            Elements houseElements = doc.select(".house-item");
            
            for (Element houseElement : houseElements) {
                String title = houseElement.select(".title").text();
                String area = houseElement.select(".area").text();
                String layout = houseElement.select(".layout").text();
                String address = houseElement.select(".address").text();
                String community = houseElement.select(".community").text();
                double totalPrice = Double.parseDouble(houseElement.select(".total-price").text());
                double unitPrice = Double.parseDouble(houseElement.select(".unit-price").text());

                House house = new House(title, area, layout, address, community, totalPrice, unitPrice);
                houses.add(house);
                
                if (houses.size() >= 100) {
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return houses;
    }

    public static void saveHouses(List<House> houses) {
        try {
            FileOutputStream fos = new FileOutputStream("houses.dat");
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(houses);
            oos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
    public static class House implements Serializable {
        private String title;
        private String area;
        private String layout;
        private String address;
        private String community;
        private double totalPrice;
        private double unitPrice;

        public House(String title, String area, String layout, String address, String community, double totalPrice, double unitPrice) {
            this.title = title;
            this.area = area;
            this.layout = layout;
            this.address = address;
            this.community = community;
            this.totalPrice = totalPrice;
            this.unitPrice = unitPrice;
        }

        // Getters and setters

        // toString method
    }
}

这段代码使用Jsoup库来解析HTML页面，并通过选择器定位目标元素，获取房屋的标题、面积、房型、地址、楼盘名、总价和单价等信息。然后将房屋信息存储在一个House对象中，再将House对象存储在一个List中。最后，使用对象输出流将List对象存储到文件中。

您可以根据需求自定义封装方法，来实现通过输入区、价格区间、房型、总价等条件对房屋信息进行查询。可以使用Collections.sort()方法来对房屋信息进行价格的升序或降序排序