dom4j的基本操作
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2022-07-16 08:43:17
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# import java.io.FileInputStream; # import java.io.FileNotFoundException; # import java.io.FileOutputStream; # import java.io.IOException; # import java.io.InputStream; # import java.io.OutputStreamWriter; # import java.io.Writer; # import java.util.Iterator; # import java.util.List; # import org.dom4j.Document; # import org.dom4j.DocumentException; # import org.dom4j.DocumentHelper; # import org.dom4j.Element; # import org.dom4j.io.OutputFormat; # import org.dom4j.io.SAXReader; # import org.dom4j.io.XMLWriter; # import org.xml.sax.EntityResolver; # import org.xml.sax.InputSource; # import org.xml.sax.SAXException; # # public class MyTest { # Document doc = null; # # public MyTest() throws DocumentException, IOException, SAXException { # Document doc = loadXML("class.xml"); // 载入XML文档 # System.out.println(doc.asXML()); # printDoc(doc); // 打印XML文档 # storeDoc(doc, "new.xml"); // 把XML文档存入硬盘 # doc = valideDoc("class.xml"); // 校验dtd XML文档 # printDoc(doc); # doc = validateDocBySxd("classSchema.xml"); // 校验Schema文档 # printDoc(doc); # String url = getClass().getResource("/xml/dom4j/wkjava/class.xsd").toString(); # doc = validateDocBySxd("classSchema.xml", url); // 校验Schema文档(俩参数) # printDoc(doc); # doc = createDoc(); // 创建Schema文档 # storeDoc(doc, "root.xml"); # doc = validateDocBySxd("classSchema.xml"); # updateZip(doc, "102202"); // 在文档中修改原属 # printDoc(doc); # doc = validateDocBySxd("classSchema.xml"); # printNames(doc); // 打印文档中所有学生名字 # System.out.println(getStudentCount(doc)); # } # # public static void main(String[] args) { # try { # new MyTest(); # } catch (FileNotFoundException e) { # e.printStackTrace(); # } catch (DocumentException e) { # e.printStackTrace(); # } catch (IOException e) { # e.printStackTrace(); # } catch (SAXException e) { # e.printStackTrace(); # } # } # # public Document loadXML(String xmlfile) throws FileNotFoundException, DocumentException { # SAXReader reader = new SAXReader(); # doc = reader.read(new FileInputStream(xmlfile)); # return doc; # } # # public void printDoc(Document doc) throws IOException { # Writer out = new OutputStreamWriter(System.out, "gb2312"); # OutputFormat format = OutputFormat.createPrettyPrint(); # XMLWriter writer = new XMLWriter(out, format); # writer.write(this.doc); # out.flush(); # } # # public void storeDoc(Document doc, String filename) throws IOException { # Writer out = new OutputStreamWriter(new FileOutputStream(filename), "utf-8"); # OutputFormat format = OutputFormat.createPrettyPrint(); # XMLWriter writer = new XMLWriter(out, format); # writer.write(this.doc); # printDoc(doc); # out.close(); # } # # public Document valideDoc(String xmlfile) throws DocumentException, IOException { # EntityResolver resolver = new EntityResolver() { # public InputSource resolveEntity(String publicId, String systemId) throws SAXException, IOException { # if (publicId.equals("//class from weiking")) { # InputStream in = new FileInputStream("class.dtd"); # return new InputSource(in); # } # return null; # } # }; # SAXReader reader = new SAXReader(true); # reader.setEntityResolver(resolver); # Document doc = reader.read(new FileInputStream(xmlfile)); # return doc; # } # # public Document validateDocBySxd(String xmlfile) throws SAXException, DocumentException, IOException { # SAXReader reader = new SAXReader(true); # reader.setFeature("http://apache.org/xml/features/validation/schema", true); # Document doc = reader.read(new FileInputStream(xmlfile)); # return doc; # } # # public Document validateDocBySxd(String xmlfile, String SchemaUrl) throws SAXException, FileNotFoundException, # DocumentException { # SAXReader reader = new SAXReader(true); # reader.setFeature("http://xml.org/sax/features/validation", true); # reader.setFeature("http://apache.org/xml/features/validation/schema", true); # reader.setFeature("http://apache.org/xml/features/validation/schema-full-checking", true); # reader.setProperty("http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation", SchemaUrl); # Document doc = reader.read(new FileInputStream(xmlfile)); # return doc; # } # # public Document createDoc() { # Document doc = DocumentHelper.createDocument(); # Element root = doc.addElement("root"); # Element author2 = root.addElement("author").addAttribute("name", "Toby").addAttribute("location", "Germany").addText( # "Tobias Rademacher"); # Element author1 = root.addElement("author").addAttribute("name", "James").addAttribute("location", "UK").addText( # "James Strachan"); # return doc; # } # # public void updateZip(Document doc, String zip) { # String xpath = "/Class/Teacher/zip"; # Element e = (Element) doc.selectSingleNode(xpath); # e.setText(zip); # } # # public void printNames(Document doc) { # String xpath = "/Class/Students/Student/name"; # List list = doc.selectNodes(xpath); # for (Iterator i = list.iterator(); i.hasNext();) { # Element e = (Element) i.next(); # System.out.println(e.element("last").getText() + e.valueOf("first")); # } # } # # public int getStudentCount(Document doc) { # int count = 0; # String xpath = "count(/Class/Students/Student)"; # count = doc.numberValueOf(xpath).intValue(); # // String value = doc.valueOf(xpath); # // count = Integer.parseInt(value); # return count; # } # }