package com.imooc.dmtest.test;

import java.io.*;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import org.w3c.dom.Document;

import org.w3c.dom.NamedNodeMap;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.SAXException;

public class DOMTest {

public static void main(String[] args){

// 創建一個DocumentBuilderFactory的對象

DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();

//創建一個DocumentBuilder對象

try {

DocumentBuilder db=dbf.newDocumentBuilder();

//通過DocumentBuilder對象的parse方法加載bookstore.xml文件到當前項目下

Document document=db.parse("bookstore.xml");

//獲取所有book的節點

NodeList bookList=document.getElementsByTagName("book");

//通過nodeList中的getLength()方法獲取book的長度

System.out.println("一共有："+bookList.getLength()+"本書");

//遍歷每一個book節點

for(int i=0;i<bookList.getLength();i++){

System.out.println("=========下面開始遍歷第"+(i+1)+"本書的內容=========");

//通過bookList.item()方法獲取每一個節點

Node book=bookList.item(i);

//獲取book節點所有屬性集合

NamedNodeMap attrs=book.getAttributes();

System.out.println("第"+(i+1)+"本書共有"+attrs.getLength()+"個屬性");

//遍歷book的屬性

for(int j=0;j<attrs.getLength();j++){

//通過item(i)方法獲取book節點的某一個屬性

Node attr=attrs.item(j);

//獲取屬性名

System.out.print("屬性名："+attr.getNodeName());

//獲取屬性值

System.out.println("--屬性值："+attr.getNodeValue());

}

System.out.println("=========結束遍歷第"+(i+1)+"本書的內容=========");

}

} catch (ParserConfigurationException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (SAXException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

代碼是按照老師講的敲上去的，運行結果如下：

com.sun.org.apache.xerces.internal.impl.io.MalformedByteSequenceException: 1 字節的 UTF-8 序列的字節 1 無效。

at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.invalidByte(UTF8Reader.java:687)

at com.sun.org.apache.xerces.internal.impl.io.UTF8Reader.read(UTF8Reader.java:557)

at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.load(XMLEntityScanner.java:1753)

at com.sun.org.apache.xerces.internal.impl.XMLEntityScanner.peekChar(XMLEntityScanner.java:497)

at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2710)

at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)

at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)

at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)

at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)

at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)

at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)

at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:347)

at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:177)

at com.imooc.dmtest.test.DOMTest.main(DOMTest.java:24)

有沒有遇到相同問題，并且解決的同學？