dom4j解析xml输出成txt

首先需要引入dom4j的相关依赖，然后按照以下步骤进行解析xml并输出成txt：

1. 创建一个Document对象并通过dom4j的SAXReader对xml文件进行解析：

SAXReader reader = new SAXReader();
Document document = reader.read(new File("file.xml"));

2. 通过XPath表达式获取需要的节点：

List<Node> nodes = document.selectNodes("//root/element");

3. 遍历节点并将内容输出到txt文件：

FileWriter writer = new FileWriter("file.txt");
for (Node node : nodes) {
    String text = node.getText();
    writer.write(text);
}
writer.close();

完整代码如下：

import java.io.File;
import java.io.FileWriter;
import java.util.List;

import org.dom4j.Document;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

public class Dom4jXmlToTxt {
    public static void main(String[] args) throws Exception {
        SAXReader reader = new SAXReader();
        Document document = reader.read(new File("file.xml"));
        List<Node> nodes = document.selectNodes("//root/element");
        FileWriter writer = new FileWriter("file.txt");
        for (Node node : nodes) {
            String text = node.getText();
            writer.write(text);
        }
        writer.close();
    }
}