使用Java提取字符串里的xml标签

<book>
    <title>Java Programming</title>
    <author>John Doe</author>
</book>

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class XmlTagExtractor {
    
    public static void main(String[] args) {
        String xmlString = "<book><title>Java Programming</title><author>John Doe</author></book>";
        
        Pattern pattern = Pattern.compile("<[^>]+>");
        Matcher matcher = pattern.matcher(xmlString);
        
        while (matcher.find()) {
            String tag = matcher.group();
            System.out.println("Found tag: " + tag);
        }
    }
}

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ExtractXML {
    public static void main(String[] args) {
        String input = "Web Service请求报文如下：<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?></Application>还有其他文本内容";

        // 定义正则表达式来匹配XML内容，假设XML以<?xml开头并以?>结束
        String regex = "<\\?xml[^>]*\\?[^>]*>";

        // 编译正则表达式
        Pattern pattern = Pattern.compile(regex, Pattern.DOTALL);
        Matcher matcher = pattern.matcher(input);

        // 查找匹配项
        while (matcher.find()) {
            // 输出找到的XML内容
            System.out.println("Found XML content: " + matcher.group());
        }
    }
}

// 定义一个示例字符串
String text = "<root><name>John</name><age>25</age></root>";

// 使用正则表达式匹配出XML内容
Pattern pattern = Pattern.compile("<.*?>");
Matcher matcher = pattern.matcher(text);
while (matcher.find()) {
    System.out.println("XML内容：" + matcher.group());
}

// 引入相关包
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;

// 创建DocumentBuilder对象
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();

// 解析XML内容
Document document = builder.parse(new InputSource(new StringReader(matcher.group())));