jsoup的使用

jsoup介绍

jsoup是一款Java的HTML解析器，可直接解析某个URL地址、HTML文本内容。它提供了一套非常省力的API，可通过DOM,css以及类似于Jquery的操作方法来取出和操作数据。

主要功能

从一个URL，文件或字符串中解析出HTML。

使用DOM或css选择器来查找、取出数据。

可操作HTML元素、属性、文本。

直接请求URL

一开始直接使用jsonp的connect方法调用上节说的请求电影json数据会报错

错误如下：

这里不太清楚发生错误的原因，毕竟换了一个连接变成http://www.w3school.com.cn/b.asp就可以正常输出html页面

如下

后来看了下网上，又看了看异常代码，发现是缺少contentType设置，于是加ignoreContentType(true)设置

public classSimple {public static voidmain(String[] args) {try{

Document doc=Jsoup

.connect("https://movie.douban.com/j/search_subjects?type=movie&tag=%E7%83%AD%E9%97%A8&sort=time&page_limit=20&page_start=0")

.ignoreContentType(true).userAgent("Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36")

.timeout(5000)

.get();//Document doc1 = Jsoup//.connect("http://www.w3school.com.cn/b.asp").get();

System.out.println(doc);

}catch(IOException e) {//TODO Auto-generated catch block

e.printStackTrace();

}

}

}

成功

整合一下，用jsoup来抓取电影信息如下

main里运行：

public static voidtest2(){try{

Response res=Jsoup

.connect("https://movie.douban.com/j/search_subjects?type=movie&tag=%E7%83%AD%E9%97%A8&sort=time&page_limit=20&page_start=0")

.header("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8")

.header("Host", "movie.douban.com")

.header("Accept-Encoding", "gzip, deflate")

.header("Accept-Language","zh-cn,zh;q=0.5")//.header("Content-Type", "application/json;charset=UTF-8")

.header("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.121 Safari/537.36")

.header("Connection", "keep-alive")

.header("Cache-Control", "max-age=0")

.ignoreContentType(true)

.timeout(5000)

.execute();

String body=res.body();

JSONObject jsonObject=JSONObject.parseObject(body);

JSONArray array= jsonObject.getJSONArray("subjects");for(int i=0;i

JSONObject jo =array.getJSONObject(i);

Movie movie= jo.toJavaObject(Movie.class);

System.out.println(movie);

}//System.out.println(array.get(1));

} catch(IOException e) {//TODO Auto-generated catch block

e.printStackTrace();

}

}

Movie.java:

public class Movie implementsSerializable{/****/

private static final long serialVersionUID = 1L;privateString rate;privateString cover_x;privateString title;privateString url;privateString playable;privateString cover;privateString id;privateString cover_y;privateString is_new;publicMovie() {//TODO Auto-generated constructor stub

}publicMovie(String rate, String cover_x, String title, String url, String playable, String cover, String id,

String cover_y, String is_new) {super();this.rate =rate;this.cover_x =cover_x;this.title =title;this.url =url;this.playable =playable;this.cover =cover;this.id =id;this.cover_y =cover_y;this.is_new =is_new;

}publicString getRate() {returnrate;

}public voidsetRate(String rate) {this.rate =rate;

}publicString getCover_x() {returncover_x;

}public voidsetCover_x(String cover_x) {this.cover_x =cover_x;

}publicString getTitle() {returntitle;

}public voidsetTitle(String title) {this.title =title;

}publicString getUrl() {returnurl;

}public voidsetUrl(String url) {this.url =url;

}publicString getPlayable() {returnplayable;

}public voidsetPlayable(String playable) {this.playable =playable;

}publicString getCover() {returncover;

}public voidsetCover(String cover) {this.cover =cover;

}publicString getId() {returnid;

}public voidsetId(String id) {this.id =id;

}publicString getCover_y() {returncover_y;

}public voidsetCover_y(String cover_y) {this.cover_y =cover_y;

}publicString getIs_new() {returnis_new;

}public voidsetIs_new(String is_new) {this.is_new =is_new;

}

@OverridepublicString toString() {return "Movie [评分：" + rate + ", 电影：" + title +"]";

}

}

输出

到此，简单的jsoup测试~