[Solved] DocumentBuilder parse XML returns null <解決 org.w3c.dom.Document 解析 XML 檔回傳值均為 NULL>

From: Polin Wei Document 解析 XML 檔案時, 解析的值總是為 NULL , 解決方法如下: 先把檔案用 StringBuilder 變成字串後, 再作解析就可以

import org.springframework.util.ResourceUtils;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;
import org.w3c.dom.Node;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.stream.Stream;

public class TestFunc {

        public static void main(String[] args) throws Exception  {
                // TODO Auto-generated method stub
                try {
                        File xmlFile = ResourceUtils.getFile("classpath:ckfinder-config.xml");
                        readMXLFile(xmlFile);
                        
                } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                }
        }
        
        public static void readMXLFile(File xmlFile) throws Exception {
                InputStream is = new FileInputStream(xmlFile);
                StringBuilder contentBuilder = new StringBuilder();
                try (Stream stream = Files.lines(Paths.get(xmlFile.getAbsolutePath()), StandardCharsets.UTF_8)) {
                        stream.forEach(s -> contentBuilder.append(s).append("\n"));
                } catch (IOException e) {
                        e.printStackTrace();
                }
                System.out.println(contentBuilder.toString());

                ByteArrayInputStream bis = new ByteArrayInputStream(contentBuilder.toString().getBytes());

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