Jsoup解析HTML的问题 [英] Jsoup parsing HTML issue

问题描述

我是新来Jsoup，我试图分析一个网站，用下面的HTML和检索的HTML文本输入的值，特别是值= 14然后我要显示该值（因为在我的Andr​​oid应用程序文本视图的字符串在这种情​​况下，14号）。我已经尝试了多种方法，但它没有工作，我刚收到空。请出示的例子。

 ＆LT; D​​IV ID =PatientsCurrentlyInClinic的风格=显示：无＆GT; ＆LT;  - 被点击这些属性的链接时，显示消息：HREF =＃信息的rel =模态 - ＆GT;            ＆LT; H3＆GT;该挂哪个科，你更新＆LT; / H3 GT＆;
            ＆LT;形式的行动=方法=获取＆GT;
            ＆所述p为H.;
                ＆LT;选择名称=patientclinicidID =patientclinicid＆GT;＆LT;期权价值=2选择＆GT;选址的两＆LT; /选项＆GT;＆LT;期权价值=1＆GT;位置的One＆LT; /选项＆GT;＆LT;选项值=3＆GT;望三＆LT; /选项＆GT;＆LT; /选择＆GT; ＆所述; / P＆GT;                ＆LT; H4＆GT;有多少病人在门诊＆LT;？/ H4＆GT;
                ＆所述p为H.;
                    对您的患者提供更好的服务，请您进入诊所的病人当前数目。
                ＆所述; / P＆GT;
                    ＆LT;输入级=文字输入中输入类型=文本ID =小投入NAME =patientsInClinicVALUE =14/＆GT;                    ＆LT; P＆GT;＆LT;输入类=按钮NAME =患者诊所类型=提交值=更新/＆GT;＆LT; / P＆GT;
            ＆LT; /表及GT;        ＆LT; / DIV＆GT; ＆所述;！ - 结束#messages  - ＆GT;
 

我的尝试，让我空如下：

 私有类标题扩展的AsyncTask＆LT;太虚，太虚，太虚＆GT; {
    字符串名称;
    字符串值;
    @覆盖
    在preExecute保护无效（）{
        super.on preExecute（）;
        mProgressDialog =新ProgressDialog（HTML.this）;
        mProgressDialog.setTitle（检查数据库）;
        mProgressDialog.setMessage（正在加载...）;
        mProgressDialog.setIndeterminate（假）;
        mProgressDialog.show（）;
    }    @覆盖
    保护无效doInBackground（虚空...... PARAMS）{
        尝试{            文档的DOC = Jsoup.connect（URL）获得（）;
            元素inputElems = doc.select（输入＃小投入）;
            对于（元inputElem：inputElems）{
                名称= inputElem.attr（名称）;
                值= inputElem.attr（值）;
            }
        }赶上（的Throwable t）的{
            t.printStackTrace（）;
        }
        返回null;
    }    @覆盖
    保护无效onPostExecute（虚空结果）{
        //设置标题为的TextView
        TextView的txttitle =（的TextView）findViewById（R.id.showPatientNumber）;
        txttitle.setText（值）;
        mProgressDialog.dismiss（）;
    }
}
 

解决方案

试试这个，

 元素inputElems = doc.select（输入）;
迭代＆所述;组件＆gt; linksIt = inputElems .iterator（）;而（linksIt.hasNext（））{
    元件inputElem = linksIt.next（）;
    字符串ID = inputElem.attr（ID）;    如果（id.equals（小投入））{
        名称= inputElem.attr（名称）;
        值= inputElem.attr（值）;
    }
}
 

I am new to Jsoup and am trying to parse a website, with the following html, and retrieve the value of the text input in the html below, specifically the "value=14" which I then want to display that value (the number 14 in this case) as a string in a text view in my android app. I have tried multiple ways but it hasn't worked, I just receive "null". Please show example.

<div id="PatientsCurrentlyInClinic" style="display: none"> <!-- Messages are shown when a link with these attributes are clicked: href="#messages" rel="modal"  -->

            <h3>Which clinic are you updating?</h3>
            <form action="" method="get">
            <p>
                <select name="patientclinicid" id="patientclinicid"><option value="2" selected>Location Two</option><option value="1">Location One</option><option value="3">Location Three</option></select>               </p>



                <h4>How many patients are in the clinic?</h4>
                <p>
                    To provide better service to your patients, please enter the current number of patients in your clinic.
                </p>
                    <input class="text-input medium-input" type="text" id="small-input" name="patientsInClinic" value="14"/>

                    <p><input class="button" name="patients-clinic" type="submit" value="Update" /></p>


            </form>

        </div> <!-- End #messages -->

My attempt that gives me "null" is as follows:

private class Title extends AsyncTask<Void, Void, Void> {
    String name;
    String value;


    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        mProgressDialog = new ProgressDialog(HTML.this);
        mProgressDialog.setTitle("Checking Database");
        mProgressDialog.setMessage("Loading...");
        mProgressDialog.setIndeterminate(false);
        mProgressDialog.show();
    }

    @Override
    protected Void doInBackground(Void... params) {
        try {

            Document doc = Jsoup.connect(url).get();
            Elements inputElems =doc.select("input#small-input");
            for (Element inputElem : inputElems){
                name = inputElem.attr("name");
                value = inputElem.attr("value");
            }
        } catch(Throwable t) {
            t.printStackTrace();
        }
        return null;
    }

    @Override
    protected void onPostExecute(Void result) {
        // Set title into TextView
        TextView txttitle = (TextView) findViewById(R.id.showPatientNumber);
        txttitle.setText(value);
        mProgressDialog.dismiss();
    }
}

解决方案

try this,

Elements inputElems =doc.select("input");
Iterator<Element> linksIt = inputElems .iterator();

while (linksIt.hasNext()) {
    Element inputElem = linksIt.next();
    String id = inputElem.attr("id");

    if(id.equals("small-input")){
        name = inputElem.attr("name");
        value= inputElem.attr("value");
    }
}

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