DOM4J创建、修改和格式xml文件

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DOM4J创建、修改和格式xml文件
import java.io.File;  import java.io.FileWriter;  import java.util.Iterator;  import java.util.List;  import org.dom4j.Attribute;  import org.dom4j.Document;  import org.dom4j.DocumentHelper;  import org.dom4j.Element;  import org.dom4j.io.OutputFormat;  import org.dom4j.io.SAXReader;  import org.dom4j.io.XMLWriter;    public class DOM4jDemo {        public int createXMLFile(String filename) {            int returnValue = 0;            Document document = DocumentHelper.createDocument();            Element booksElement = document.addElement("books");            booksElement.addComment("This is a test for dom4j, holen, 2004.9.11");            Element bookElement = booksElement.addElement("book");          /** 加入show属性内容 */          bookElement.addAttribute("show", "yes");          /** 加入title节点 */          Element titleElement = bookElement.addElement("title");          /** 为title设置内容 */          titleElement.setText("Dom4j Tutorials");            /** 类似的完成后两个book */          bookElement = booksElement.addElement("book");          bookElement.addAttribute("show", "yes");          titleElement = bookElement.addElement("title");          titleElement.setText("Lucene Studing");          bookElement = booksElement.addElement("book");          bookElement.addAttribute("show", "no");          titleElement = bookElement.addElement("title");          titleElement.setText("Lucene in Action");            /** 加入owner节点 */          Element ownerElement = booksElement.addElement("owner");          ownerElement.setText("O'Reilly");          try {              /** 将document中的内容写入文件中 */              XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)));              writer.write(document);              writer.close();              /** 执行成功,需返回1 */              returnValue = 1;          } catch (Exception ex) {              ex.printStackTrace();          }          return returnValue;      }        /**      * 修改XML文件中内容,并另存为一个新文件 重点掌握dom4j中如何添加节点,修改节点,删除节点      *       * @param filename      *            修改对象文件      * @param newfilename      *            修改后另存为该文件      * @return 返回操作结果, 0表失败, 1表成功      */      public int ModiXMLFile(String filename, String newfilename) {          int returnValue = 0;          try {              SAXReader saxReader = new SAXReader();              Document document = saxReader.read(new File(filename));              /** 修改内容之一: 如果book节点中show属性的内容为yes,则修改成no */              /** 先用xpath查找对象 */              List list = document.selectNodes("/books/book/@show");              Iterator iter = list.iterator();              while (iter.hasNext()) {                  Attribute attribute = (Attribute) iter.next();                  if (attribute.getValue().equals("yes")) {                      attribute.setValue("no");                  }              }              /**              * 修改内容之二: 把owner项内容改为Tshinghua              * 并在owner节点中加入date节点,date节点的内容为2004-09-11,还为date节点添加一个属性type              */              list = document.selectNodes("/books/owner");              iter = list.iterator();              if (iter.hasNext()) {                  Element ownerElement = (Element) iter.next();                  ownerElement.setText("Tshinghua");                  Element dateElement = ownerElement.addElement("date");                  dateElement.setText("2004-09-11");                  dateElement.addAttribute("type", "Gregorian calendar");              }              /** 修改内容之三: 若title内容为Dom4j Tutorials,则删除该节点 */              list = document.selectNodes("/books/book");              iter = list.iterator();              while (iter.hasNext()) {                  Element bookElement = (Element) iter.next();                  Iterator iterator = bookElement.elementIterator("title");                  while (iterator.hasNext()) {                      Element titleElement = (Element) iterator.next();                      if (titleElement.getText().equals("Dom4j Tutorials")) {                          bookElement.remove(titleElement);                      }                  }              }              try {                  /** 将document中的内容写入文件中 */                  XMLWriter writer = new XMLWriter(new FileWriter(new File(                          newfilename)));                  writer.write(document);                  writer.close();                  /** 执行成功,需返回1 */                  returnValue = 1;              } catch (Exception ex) {                  ex.printStackTrace();              }          } catch (Exception ex) {              ex.printStackTrace();          }          return returnValue;      }        /**      * 格式化XML文档,并解决中文问题      *       * @param filename      * @return      */      public int formatXMLFile(String filename) {          int returnValue = 0;          try {              SAXReader saxReader = new SAXReader();              Document document = saxReader.read(new File(filename));              XMLWriter writer = null;              /** 格式化输出,类型IE浏览一样 */              OutputFormat format = OutputFormat.createPrettyPrint();              /** 指定XML编码 */              format.setEncoding("GBK");              writer = new XMLWriter(new FileWriter(new File(filename)), format);              writer.write(document);              writer.close();              /** 执行成功,需返回1 */              returnValue = 1;            } catch (Exception ex) {              ex.printStackTrace();          }            return returnValue;        }        public static void main(String[] args) {            DOM4jDemo temp = new DOM4jDemo();          System.out.println(temp.createXMLFile("f://holen.xml"));          System.out.println(temp.ModiXMLFile("f://holen.xml", "f://holen2.xml"));          System.out.println(temp.formatXMLFile("f://holen2.xml"));      }    }
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