Android 创建与解析XML（五）——详解Dom4j方式

/** Dom4j方式，创建 XML */ 
public String dom4jXMLCreate(){ 
  StringWriter xmlWriter = new StringWriter(); 
 
  Person []persons = new Person[3];    // 创建节点Person对象 
  persons[0] = new Person(1, "sunboy_2050", "http://blogcsdnnet/sunboy_2050"); 
  persons[1] = new Person(2, "baidu", "http://wwwbaiducom"); 
  persons[2] = new Person(3, "google", "http://wwwgooglecom"); 
   
  try { 
    orgdom4jDocument doc = DocumentHelpercreateDocument(); 
     
    docsetXMLEncoding("utf-8"); 
     
    orgdom4jElement eleRoot = docaddElement("root"); 
    eleRootaddAttribute("author", "homer"); 
    eleRootaddAttribute("date", "2012-04-25"); 
    eleRootaddComment("dom4j test"); 
     
    int personsLen = personslength; 
    for(int i=0; i<personsLen; i++){ 
       
      Element elePerson = eleRootaddElement("person");  // 创建person节点，引用类为 orgdom4jElement 
       
      Element eleId = elePersonaddElement("id"); 
      eleIdaddText(persons[i]getId()+""); 
       
      Element eleName = elePersonaddElement("name"); 
      eleNameaddText(persons[i]getName()); 
       
      Element eleBlog = elePersonaddElement("blog"); 
      eleBlogaddText(persons[i]getBlog()); 
    } 
 
    orgdom4jioOutputFormat outputFormat = new orgdom4jioOutputFormat();  // 设置xml输出格式 
    outputFormatsetEncoding("utf-8"); 
    outputFormatsetIndent(false); 
    outputFormatsetNewlines(true); 
    outputFormatsetTrimText(true); 
     
    orgdom4jioXMLWriter output = new XMLWriter(xmlWriter, outputFormat);   // 保存xml 
    outputwrite(doc); 
    outputclose(); 
  } catch (Exception e) { 
    eprintStackTrace(); 
  } 
   
  savedXML(fileName, xmlWritertoString()); 
  return xmlWritertoString(); 
} 

/** Dom4j方式，解析 XML */ 
public String dom4jXMLResolve(){ 
  StringWriter xmlWriter = new StringWriter(); 
   
  InputStream is = readXML(fileName); 
  try { 
    SAXReader reader = new SAXReader(); 
    orgdom4jDocument doc = readerread(is); 
 
    List<Person> personsList = null; 
    Person person = null; 
    StringBuffer xmlHeader = new StringBuffer(); 
     
     
    Element eleRoot = docgetRootElement();   // 获得root根节点，引用类为 orgdom4jElement 
    String attrAuthor = eleRootattributeValue("author"); 
    String attrDate = eleRootattributeValue("date"); 
    xmlHeaderappend("root")append("\t\t"); 
    xmlHeaderappend(attrAuthor)append("\t"); 
    xmlHeaderappend(attrDate)append("\n"); 
    personsList = new ArrayList<Person>(); 
     
    // 获取root子节点，即person 
    Iterator<Element> iter = eleRootelementIterator(); 
    for(; iterhasNext(); ) { 
      Element elePerson = (Element)iternext(); 
       
      if("person"equals(elePersongetName())){ 
        person = new Person(); 
         
        // 获取person子节点，即id、name、blog 
        Iterator<Element> innerIter = elePersonelementIterator(); 
        for(; innerIterhasNext();) { 
          Element ele = (Element)innerIternext(); 
           
          if("id"equals(elegetName())) { 
            String id = elegetText(); 
            personsetId(IntegerparseInt(id)); 
          } else if("name"equals(elegetName())) { 
            String name = elegetText(); 
            personsetName(name); 
          } else if("blog"equals(elegetName())) { 
            String blog = elegetText(); 
            personsetBlog(blog); 
          } 
        } 
         
        personsListadd(person); 
        person = null; 
      } 
    } 
     
    xmlWriterappend(xmlHeader); 
    int personsLen = personsListsize(); 
    for(int i=0; i<personsLen; i++) { 
      xmlWriterappend(personsListget(i)toString()); 
    } 
     
  } catch (DocumentException e) { 
    eprintStackTrace(); 
  } catch (Exception e) { 
    eprintStackTrace(); 
  } 
   
  return xmlWritertoString(); 
} 

/** Dom4j方式，解析 XML（方式二） */ 
public String dom4jXMLResolve2(){ 
  StringWriter xmlWriter = new StringWriter(); 
   
  InputStream is = readXML(fileName); 
  try { 
    orgdom4jioSAXReader reader = new orgdom4jioSAXReader(); 
    orgdom4jDocument doc = readerread(is); 
 
    List<Person> personsList = null; 
    Person person = null; 
    StringBuffer xmlHeader = new StringBuffer(); 
     
     
    Element eleRoot = docgetRootElement();   // 获得root根节点，引用类为 orgdom4jElement 
    String attrAuthor = eleRootattributeValue("author"); 
    String attrDate = eleRootattributeValue("date"); 
    xmlHeaderappend("root")append("\t\t"); 
    xmlHeaderappend(attrAuthor)append("\t"); 
    xmlHeaderappend(attrDate)append("\n"); 
    personsList = new ArrayList<Person>(); 
     
    @SuppressWarnings("unchecked") 
    List<Element> idList = (List<Element>) docselectNodes("//root//person//id");  // 选择性获取全部id 
    Iterator<Element> idIter = idListiterator(); 
    while(idIterhasNext()){ 
      person = new Person(); 
       
      Element idEle = (Element)idIternext(); 
      String id = idElegetText(); 
      personsetId(IntegerparseInt(id)); 
       
      personsListadd(person); 
    } 
 
    xmlWriterappend(xmlHeader); 
    int personsLen = personsListsize(); 
    for(int i=0; i<personsLen; i++) { 
      xmlWriterappend("id = ")append(personsListget(i)getId()+"")append("\n"); 
    } 
     
  } catch (DocumentException e) { 
    eprintStackTrace(); 
  } catch (Exception e) { 
    eprintStackTrace(); 
  } 
   
  return xmlWritertoString(); 
}