Jsoup範例：提取表單引數

在這個例子中，我們將提取並列印表單引數，如引數名稱和引數值。為此，我們呼叫Document類的getElementById()方法和Element類的getElementsByTag()方法。

建立一個HTML檔案：register.html，程式碼如下 -

<!DOCTYPE html>  
<html>  
<head>  
<meta charset="utf-8">  
<title>Register Please</title>  
</head>  
<body>  
<form id="registerform" action="register.jsp" method="post">  
Name:<input type="text" name="name" value="maxsu"/><br/>  
Password:<input type="password" name="password" value="sj"/><br/>  
Email:<input type="email" name="email" value="[email protected]"/><br/>  
<input name="submitbutton" type="submit" value="register"/>  
</form>  
</body>  
</html>  
`

建立一個Java類檔案：JsoupPrintFormParameters.java，程式碼如下 -

import java.io.File;  
import java.io.IOException;  
import org.jsoup.Jsoup;  
import org.jsoup.nodes.Document;  
import org.jsoup.nodes.Element;  
import org.jsoup.select.Elements;  
public class JsoupPrintFormParameters {  
public static void main(String[] args) throws IOException {  
    Document doc = Jsoup.parse(new File("e:\\register.html"),"utf-8");  
    Element loginform = doc.getElementById("registerform");  

    Elements inputElements = loginform.getElementsByTag("input");  
    for (Element inputElement : inputElements) {  
        String key = inputElement.attr("name");  
        String value = inputElement.attr("value");  
        System.out.println("Param name: "+key+" \nParam value: "+value);  
    }  
}  
}

執行結果 -

Param name: name 
Param value: maxsu
Param name: password 
Param value: sj
Param name: email 
Param value: [email protected]
Param name: submitbutton 
Param value: register

自已程式設計執行看看吧