java语言——四种读取xml文件的方式，以及实现对excel文件的读取与保存(含相关的jar包)

package xml; import java.io.FileInputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; import org.jdom.Attribute; import org.jdom.Document; import org.jdom.Element; import org.jdom.input.SAXBuilder; /* * JDOM是第三方提供的解析XML方法，需要jdom-2.0.5.jar包 */ public class JDOM解析XML { private static List<Book> bookList = new ArrayList<Book>(); public static void main(String[] args) { //创建SAXBuilder对象 SAXBuilder saxBuilder = new SAXBuilder(); InputStream in; try { //创建一个输入流，加载xml文件 in = new FileInputStream("books.xml"); InputStreamReader isr = new InputStreamReader(in,"UTF-8"); //通过saxBuilder方法，将输入流加载到saxBuilder中 Document document = saxBuilder.build(isr); //获取xml文件根节点 Element root = document.getRootElement(); System.out.println(root.getName()); //获取根节点下的子节点的List集合 List<Element> bookList = root.getChildren(); for(Element book:bookList) { Book bookBean = new Book(); System.out.println("===========第"+(bookList.indexOf(book)+1)+"记录内容=========="); //解析book的属性集合 List<Attribute> attributes = book.getAttributes(); //遍历属性值名称 for(Attribute attribute:attributes) { String attrName = attribute.getName(); String attrValue = attribute.getValue(); System.out.println("属性名="+attrName+"\t"+"属性值="+attrValue); if (attrName.equals("id")) { bookBean.setId(attrValue); } } //对节点的子节点进行遍历 List<Element> bookChild = book.getChildren(); for(Element child:bookChild) { System.out.println("节点名="+child.getName()+"\t"+"值="+child.getValue()); if (child.getName().equals("name")) { bookBean.setName(child.getValue()); }else if (child.getName().equals("author")) { bookBean.setAuthor(child.getValue()); }else if (child.getName().equals("year")) { bookBean.setYear(child.getValue()); }else if (child.getName().equals("price")) { bookBean.setPrice(child.getValue()); }else if (child.getName().equals("language")) { bookBean.setLanguage(child.getValue()); } } JDOM解析XML.bookList.add(bookBean); bookBean = null; //测试数据 System.out.println(JDOM解析XML.bookList.size()); System.out.println(JDOM解析XML.bookList.get(0).getId()); System.out.println(JDOM解析XML.bookList.get(0).getName()); } } catch (Exception e) { e.printStackTrace(); } } }