我试图通过Java中的jsoup解析过去3天的某些信息-_-，这是我的代码：
Document document = Jsoup.connect(urlofpage).get();
Elements links = document.select(".contentBox");
for (Element link : links) {
// String name = link.text();
String title = link.select("h2").text();
int h2length = link.select("h2").size();
for( int i = 0; i <= h2length -1; i++)
{
String s = link.select("h2").get(i).text();
boolean desc1 = Pattern.compile("What is").matcher(s).find();
boolean desc2 = Pattern.compile("Uses for").matcher(s).find();
if(desc1 == true || desc2 == true)
{
String descritop = "";
int plength = link.select("p ~ h2 ~ p").size() - link.select("h2 ~ p").size();
System.out.println(h2length);
String ssv = link.select("h2 ~ p").get(1).text();
}
}
它是按照指示获取数据，取出h2和p的数据分开，但问题是，我想解析d ata inside of <p> tag which is just after every <h2> tag。
例如（HTML内容）：
<h2>main content</h2>
<div class="acx"><div>
<p>content</p>
<p>content 2</p>
<h2>content 2</h2>
<div class="acx"><div>
<p>new content od 2</p>
<p>new 2</p>
现在它应该像（在数组中）一样获取：
array[0] = "content content 2",
array[1] = "new content od 2 new 2",
任何解决方案？
答案 0 :(得分：1)
我的想法很简单。在p元素之后获取第一个h2元素并将其添加到ArrayList，然后检查下一个元素是否为p并添加它。例如：
ArrayList<ArrayList<String>> textInsidePList = new ArrayList<ArrayList<String>>();
for (Element link : links) {
Elements headings2 = link.select("h2 ~ p");
for (int i = 0; i < headings2.size(); i++) {
ArrayList<String> textInsideP = new ArrayList<String>();
textInsideP.add(headings2.get(i).text());
Element nextPar = headings2.get(i).nextElementSibling();
if (nextPar.nodeName() == "p") {
textInsideP.add(nextPar.text());
}
textInsidePList.add(textInsideP);
}
}
如果你有超过2个p元素，你只需要写一个递归。但是如果你可以在p之间有其他元素，那么这段代码将不起作用。因此，您将拥有一个ArrayList，其中包含一个ArrayLists，表示h2元素，其中包含p个节点的文本。
修改即可。递归示例：
public static void main(String[] args) throws IOException {
String html = "<h2>first h2</h2>" +
"<div class=\"acx\"></div>" +
"<p>first h2 content 1</p>" +
"<p>first h2 content 2</p>" +
"<p>first h2 content 3</p>" +
"<p>first h2 content 4</p>" +
"<h2>second h2</h2>" +
"<div class=\"acx\"></div>" +
"<p>second h2 content 1</p>" +
"<p>second h2 content 2</p>";
Document document = Jsoup.parse(html);
/* creating first order ArrayList */
ArrayList<ArrayList<String>> textInsidePList = new ArrayList<ArrayList<String>>();
Elements headings2 = document.select("h2");
for (Element heading2 : headings2) {
/* creating second order ArrayList and adding data */
ArrayList<String> textInsideP = new ArrayList<String>();
textInsideP.add(heading2.text()); // delete this line to remove h2 content from array, this just for example
parsingRecursion(heading2, textInsideP);
textInsidePList.add(textInsideP);
}
/* iteraiting through ArrayList */
for (ArrayList<String> firstH2 : textInsidePList) {
System.out.println("h2:");
for (String parsInsideH2 : firstH2) {
System.out.println(parsInsideH2);
}
}
}
/* recursive function */
private static void parsingRecursion(Element heading2, ArrayList<String> textInsideP) {
Element nextPar = heading2.nextElementSibling();
if (nextPar != null && nextPar.nodeName() == "p") {
textInsideP.add(nextPar.text());
parsingRecursion(nextPar, textInsideP);
} else if (nextPar != null && nextPar.nodeName() != "h2") {
Element nextNotP = nextPar.nextElementSibling();
textInsideP.add(nextNotP.text());
parsingRecursion(nextNotP, textInsideP);
}
}
}
：
h2:
first h2
first h2 content 1
first h2 content 2
first h2 content 3
first h2 content 4
h2:
second h2
second h2 content 1
second h2 content 2
使用了递归，因为我们不知道在h2之前我们会遇到多少'p'节点。使用ArrayList而不是数组，因为我们可以动态添加元素而无需设置数组的大小。
编辑＃2 ，问题已更改：
public static void main(String[] args) throws IOException {
Document document = Jsoup.connect(pathToYoursCusromUrl).get();
Elements links = document.select(".contentBox");
for (Element link : links) {
/* creating first order ArrayList */
ArrayList<ArrayList<String>> textInsidePList = new ArrayList<ArrayList<String>>();
Elements headings2 = document.select("h2");
for (Element heading2 : headings2) {
/* creating second order ArrayList and adding data */
ArrayList<String> textInsideP = new ArrayList<String>();
parsingRecursion(heading2, textInsideP);
textInsidePList.add(textInsideP);
}
/* iteraiting through ArrayList */
for (ArrayList<String> firstH2 : textInsidePList) {
System.out.println("h2:");
for (String parsInsideH2 : firstH2) {
System.out.println("p:" + parsInsideH2);
}
}
}
}
/* recursive function */
private static void parsingRecursion(Element heading2, ArrayList<String> textInsideP) {
Element nextPar = heading2.nextElementSibling();
if (nextPar != null && nextPar.nodeName() == "p") {
textInsideP.add(nextPar.text());
parsingRecursion(nextPar, textInsideP);
} else if (nextPar != null && nextPar.nodeName() != "h2") {
Element nextNotP = nextPar.nextElementSibling();
if (nextNotP != null) {
textInsideP.add(nextNotP.text());
parsingRecursion(nextNotP, textInsideP);
}
}
}
}
：
h2:
p:Vitamins A, D, and E topical (for the skin) is a skin protectant. It works by moisturizing and sealing the skin, and aids in skin healing.
p:This medication is used to treat diaper rash, dry or chafed skin, and minor cuts or burns.
p:Vitamins A, D, and E may also be used for purposes not listed in this medication guide.
h2:
p:You should not use this medication if your child is allergic to it. Do not apply vitamins A, D, and E topical without a rubber glove or finger cot if you are allergic this medication.
p:Ask a doctor or pharmacist if it is safe for you to use this medication on your child if the child is allergic to any medicines or skin products, including soaps, oils, lotions, or creams.
p:Stop using the medication and call your doctor at once if your child has a serious side effect such as warmth, redness, oozing, or severe irritation where the medicine is applied.
p:Keep the baby's diaper area as dry as possible. Change wet or soiled diapers immediately to keep wetness and bacteria from irritating the baby's skin. Always put on a new diaper when the baby first wakes up in the morning, and also just before putting the baby to bed each night.
依旧......