htmlunit 模拟登录 数字验证码

使用htmlunit的好处有两点,相比httpclient,htmlunit是对浏览器的模拟,比如你定位一个按钮,就可以执行click()方法,此外不需要象在httpclient中一样编写复杂的代码,如一堆request header还有一大堆请求参数,你只需要填写用户名,密码,验证码即可,就象在使用一个没有界面的浏览器,当然更重要的是htmlunit对js的支持设置极其简单

1.添加maven的htmlunit(标红)依赖

 1　 <dependencies>
 2     <dependency>
 3         <groupId>junit</groupId>
 4         <artifactId>junit</artifactId>
 5         <version>${junit.version}</version>
 6         <scope>test</scope>
 7     </dependency>
 8     <dependency>
 9         <groupId>com.alibaba</groupId>
10         <artifactId>fastjson</artifactId>
11         <version>1.2.47</version>
12     </dependency>
13     <dependency>
14         <groupId>org.jsoup</groupId>
15         <artifactId>jsoup</artifactId>
16         <version>1.11.3</version>
17     </dependency>
18     <dependency>
19         <groupId>net.sourceforge.htmlunit</groupId>
20         <artifactId>htmlunit</artifactId>
21         <version>2.18</version>
22     </dependency>
23
24   </dependencies>

2.思路

定位用户名,密码,验证码框等元素,填写即可,验证码可以先把图片下载下来然后手动输入,也可以使用tess4j进行图片识别,这里是手动输入

测试的网站,是一个伪ajaxsubmit,测试多次发现需要二次输入验证码才能正确登录,但令人疑惑的是两次生成的验证码一样(如果不一样说明你第一次输入错误)

 1 public static void main(String[] args) throws Exception {
 2         WebClient webClient = new WebClient(BrowserVersion.CHROME);
 3         webClient.getOptions().setJavaScriptEnabled(true);
 4         webClient.getOptions().setCssEnabled(true);
 5         webClient.getOptions().setThrowExceptionOnScriptError(false);
 6     //    webClient.getOptions().setThrowExceptionOnFailingStatusCode(true);
 7         webClient.getOptions().setActiveXNative(true);
 8
 9
10         //ajax
11         webClient.setAjaxController(new NicelyResynchronizingAjaxController());
12         webClient.getOptions().setUseInsecureSSL(false);
13
14
15         //允许重定向
16         webClient.getOptions().setRedirectEnabled(true);
17
18
19         //连接超时
20         webClient.getOptions().setTimeout(5000);
21
22         //js执行超时
23         webClient.setJavaScriptTimeout(10000*3);
24
25         //对于此网站务必开启
26         webClient.getCookieManager().setCookiesEnabled(true);
27
28         String url = "https://www.zuhaowan.com/login/";
29         HtmlPage page = webClient.getPage(url);
30         webClient.waitForBackgroundJavaScript(5000);
31
32
33
34
35         HtmlPage newPage = readyPage(page, webClient);
36     //    String content1 = newPage.asXml();
37     //    IOUtils.write(content1.getBytes(),new FileWriter(new File("f:/content1.txt")));
38
39         //如果页面url没有变化重新进行一次登录
40         if(newPage.getUrl().toString().equals(url)) {
41             System.out.println("出现错误请重新登录-------------");
42             HtmlPage result = readyPage(newPage,webClient);
43             System.out.println("url----------------"+result.getUrl());
44             System.out.println("页面----" + result.asXml());
45         //    IOUtils.write(result.asXml(),new FileWriter(new File("f:/content2.txt")));
46
47         }
48
49         webClient.close();
50     }
51
52
53
54     public static HtmlPage readyPage(HtmlPage page,WebClient webClient) throws Exception {
55         //封装页面元素
56         HtmlForm form  = page.getHtmlElementById("form2");
57         HtmlTextInput loginname = form.getInputByName("loginname");
58         loginname.setValueAttribute("用户名");
59         HtmlPasswordInput loginpwd = form.getInputByName("loginpwd");
60         loginpwd.setValueAttribute("密码");
61
62         //验证码输入框
63         HtmlTextInput verify_code = form.getInputByName("verify_code");
64
65         //验证码图片
66         HtmlImage verify_img = (HtmlImage) page.getElementById("verify_img");
67         UUID randomUUID = UUID.randomUUID();
68         //保存
69         verify_img.saveAs(new File("./src/main/resources/image/verifyimg"+ randomUUID.toString() +".png"));
70
71         System.out.println("验证码图片已保存!");
72         System.out.println("请输入验证码");
73         //手动输入验证码
74         Scanner scanner = new Scanner(System.in);
75         String code = scanner.nextLine();
76         System.out.println("验证码-------------" + code);
77         verify_code.setValueAttribute(code);
78
79
80         //登录按钮
81         HtmlAnchor login = page.getHtmlElementById("loginsubmit");
82         HtmlPage newPage = login.click();
83
84         //等待js加载
85         webClient.waitForBackgroundJavaScript(5000);
86         return newPage;
87
88     }
89     

3.控制台部分输出截图

原文地址：https://www.cnblogs.com/tele-share/p/9445075.html