Java Can'；t获取循环的外部值

在for循环的外面，我不能得到所有的值，我只得到最后一个值，代码如下

public static void getHTMLElements(List<String> urls) throws IOException {

            getElements(urls);
            for (Map.Entry<String, HtmlElements> entry1 : urlList.entrySet()) {
                HtmlElements htmlele = entry1.getValue();
                System.out.println("url is " + entry1.getKey());
                System.out.println("Element Name is " + htmlele.getElementName());
                System.out.println("Attributes are " + htmlele.getAttributes());
            }

        }

        public static void getElements(List<String> urls) throws IOException {

            try {

                for (int i = 0; i < urls.size(); i++) {

                    String s = urls.get(i);

                    Document doc = Jsoup.connect(s).get();

                    getInputElements(doc, s);

                }
            }

            catch (Exception e) {
                e.printStackTrace();
            }

        }

        public static void getInputElements(Document doc, String urls) {
            // List l=new ArrayList();
            HtmlElements htmlElements = new HtmlElements();
            Properties attributes = new Properties();

            Elements elements = doc.getAllElements();
            for (Element element : elements) {
                if (!element.tagName().contains("script")) {
                    String elementName = element.tagName();
                    Attributes attr = element.attributes();
                    for (Attribute attr1 : attr) {

                        if (attr1.getKey().contains("id")) {
                            attributes.put(attr1.getKey(), attr1.getValue());

                        }
                        if (attr1.getKey().contains("name")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                        if (attr1.getKey().contains("type")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                    }
                    htmlElements.setElementName(elementName);
                    htmlElements.setAttributes(attributes);

                }
                urlList.put(urls, htmlElements);

            }
    }
    }

publicstaticvoid getHTMLElements（列表URL）引发IOException{
获取元素（URL）；
对于（Map.Entry entry1:urlList.entrySet（））{
HtmlElements htmlele=entry1.getValue（）；
System.out.println（“url是”+entry1.getKey（））；
System.out.println（“元素名为”+htmlele.getElementName（））；
System.out.println（“属性是”+htmlele.getAttributes（））；
}
}
公共静态void getElements（列表URL）引发IOException{
试一试{
对于（int i=0；i

---

在上面的代码中，我试图从网站url获取所有元素。但是，elementName无法正确获取。仅获取最后一个值。我希望获取for循环之外的值。

我假设您希望elementName包含具有“script”的元素的名称。在这种情况下，当您找到元素时，您需要停止循环。在if语句中添加break

public static void getHTMLElements(List<String> urls) throws IOException {

            getElements(urls);
            for (Map.Entry<String, HtmlElements> entry1 : urlList.entrySet()) {
                HtmlElements htmlele = entry1.getValue();
                System.out.println("url is " + entry1.getKey());
                System.out.println("Element Name is " + htmlele.getElementName());
                System.out.println("Attributes are " + htmlele.getAttributes());
            }

        }

        public static void getElements(List<String> urls) throws IOException {

            try {

                for (int i = 0; i < urls.size(); i++) {

                    String s = urls.get(i);

                    Document doc = Jsoup.connect(s).get();

                    getInputElements(doc, s);

                }
            }

            catch (Exception e) {
                e.printStackTrace();
            }

        }

        public static void getInputElements(Document doc, String urls) {
            // List l=new ArrayList();
            HtmlElements htmlElements = new HtmlElements();
            Properties attributes = new Properties();

            Elements elements = doc.getAllElements();
            for (Element element : elements) {
                if (!element.tagName().contains("script")) {
                    String elementName = element.tagName();
                    Attributes attr = element.attributes();
                    for (Attribute attr1 : attr) {

                        if (attr1.getKey().contains("id")) {
                            attributes.put(attr1.getKey(), attr1.getValue());

                        }
                        if (attr1.getKey().contains("name")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                        if (attr1.getKey().contains("type")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                    }
                    htmlElements.setElementName(elementName);
                    htmlElements.setAttributes(attributes);

                }
                urlList.put(urls, htmlElements);

            }
    }
    }

如果（！element.tagName（）包含（“脚本”））{
elementName=element.tagName（）；
打破
}

因为

String elementName

只分配了for循环中的最后一个值。如果需要所有的

标记名

，请声明

列表标记名=新的ArrayList（）收集和保存

public static void getHTMLElements(List<String> urls) throws IOException {

            getElements(urls);
            for (Map.Entry<String, HtmlElements> entry1 : urlList.entrySet()) {
                HtmlElements htmlele = entry1.getValue();
                System.out.println("url is " + entry1.getKey());
                System.out.println("Element Name is " + htmlele.getElementName());
                System.out.println("Attributes are " + htmlele.getAttributes());
            }

        }

        public static void getElements(List<String> urls) throws IOException {

            try {

                for (int i = 0; i < urls.size(); i++) {

                    String s = urls.get(i);

                    Document doc = Jsoup.connect(s).get();

                    getInputElements(doc, s);

                }
            }

            catch (Exception e) {
                e.printStackTrace();
            }

        }

        public static void getInputElements(Document doc, String urls) {
            // List l=new ArrayList();
            HtmlElements htmlElements = new HtmlElements();
            Properties attributes = new Properties();

            Elements elements = doc.getAllElements();
            for (Element element : elements) {
                if (!element.tagName().contains("script")) {
                    String elementName = element.tagName();
                    Attributes attr = element.attributes();
                    for (Attribute attr1 : attr) {

                        if (attr1.getKey().contains("id")) {
                            attributes.put(attr1.getKey(), attr1.getValue());

                        }
                        if (attr1.getKey().contains("name")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                        if (attr1.getKey().contains("type")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                    }
                    htmlElements.setElementName(elementName);
                    htmlElements.setAttributes(attributes);

                }
                urlList.put(urls, htmlElements);

            }
    }
    }

 if (!element.tagName().contains("script")) {
    tagNames.add(element.tagName());
 }

这样，列表中就有了所有标记名。
当循环循环时，该值会被覆盖。同样，您可以看到循环外的最后一个值。当您使用值设置变量时，它将替换该值。尝试将print语句移动到循环中。您想做什么？您是指String[]elementNames吗？我不明白你的问题是什么。请检查我的完整代码。我想从for循环的外部获取这些值谢谢，它正在工作。但是，如果你看到我上面的代码，我如何从for循环的外部获取属性值。你能指定
HtmlElements
class吗？我知道
HtmlElement
但不知道
HtmlElement
类
public static void getHTMLElements(List<String> urls) throws IOException {

            getElements(urls);
            for (Map.Entry<String, HtmlElements> entry1 : urlList.entrySet()) {
                HtmlElements htmlele = entry1.getValue();
                System.out.println("url is " + entry1.getKey());
                System.out.println("Element Name is " + htmlele.getElementName());
                System.out.println("Attributes are " + htmlele.getAttributes());
            }

        }

        public static void getElements(List<String> urls) throws IOException {

            try {

                for (int i = 0; i < urls.size(); i++) {

                    String s = urls.get(i);

                    Document doc = Jsoup.connect(s).get();

                    getInputElements(doc, s);

                }
            }

            catch (Exception e) {
                e.printStackTrace();
            }

        }

        public static void getInputElements(Document doc, String urls) {
            // List l=new ArrayList();
            HtmlElements htmlElements = new HtmlElements();
            Properties attributes = new Properties();

            Elements elements = doc.getAllElements();
            for (Element element : elements) {
                if (!element.tagName().contains("script")) {
                    String elementName = element.tagName();
                    Attributes attr = element.attributes();
                    for (Attribute attr1 : attr) {

                        if (attr1.getKey().contains("id")) {
                            attributes.put(attr1.getKey(), attr1.getValue());

                        }
                        if (attr1.getKey().contains("name")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                        if (attr1.getKey().contains("type")) {
                            attributes.put(attr1.getKey(), attr1.getValue());
                        }
                    }
                    htmlElements.setElementName(elementName);
                    htmlElements.setAttributes(attributes);

                }
                urlList.put(urls, htmlElements);

            }
    }
    }