Java解析xml文件时会抛出“The encoding declaration is required in the text declaration.”

package com.imooc.jdomtest; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.List; import org.jdom2.Attribute; import org.jdom2.Document; import org.jdom2.Element; import org.jdom2.JDOMException; import org.jdom2.input.SAXBuilder; import com.imooc.entity.Book; public class JDOMTest { /** * @param args */ public static void main(String[] args) { // SAXBuilder saxBuilder=new SAXBuilder(); //创建一个输入流 InputStream in; try { in = new FileInputStream("src/res/books.xml"); InputStreamReader isr=new InputStreamReader(in, "UTF-8"); Document document= saxBuilder.build(isr); Element rootElement=document.getRootElement(); List<Element> bookList=rootElement.getChildren(); //进行解析 for(Element book:bookList){ Book bookEntity=new Book(); System.out.println("====开始解析第"+(bookList.indexOf(book)+1)+"本书==="); List<Attribute> attrList=book.getAttributes(); for(Attribute attr :attrList){ String attrName=attr.getName(); String attrValue =attr.getValue(); System.out.println("属性名:"+attrName+"----属性值"+attrValue); if(attrName.equals("id")){ bookEntity.setId(attrValue); } } List<Element> bookChilds= book.getChildren(); for(Element child :bookChilds){ System.out.println("节点名"+child.getName()+"-----节点值"+child.getValue()); } System.out.println("====结束解析第"+(bookList.indexOf(book)+1)+"本书==="); } } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (JDOMException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }

Java解析xml文件时会抛出“The encoding declaration is required in the text declaration.”

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