DOM 解析器使用

超、凢脫俗 2022-08-02 02:23 135阅读 0赞

根据需求xml 创建一个结点以及文件。

public int onCreateEap() \{  
  
try \{  
  
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
DocumentBuilder db = dbf.newDocumentBuilder();  
Document document = db.parse(new File(FILE\_PATH));  
  
Element eapElement = document.createElement("eap");  
eapElement.setAttribute("active", "1");  
eapElement.setAttribute("options", "8");  
eapElement.setAttribute("strict", "0");  
  
Element provisioningElement = (Element) document  
.getElementsByTagName("provisioning").item(0);  
provisioningElement.appendChild(eapElement);  
  
Element certificateElement = document  
.createElement("root-certificate");  
certificateElement.setAttribute("encoding", "pem");  
  
Element neweapElement = (Element) document.getElementsByTagName(  
"eap").item(0);  
  
Log.d("jcmtest", "readFileData\*\*\*\*\*\*\*\*1");  
  
neweapElement.appendChild(certificateElement);  
  
Element naiElement = document.createElement("nai");  
neweapElement.insertBefore(naiElement, certificateElement);  
  
Element newnaiElement = (Element) document.getElementsByTagName(  
"nai").item(0);  
  
Log.d("jcmtest", "readFileData\*\*\*\*\*\*\*\*2");  
Element prefixElement = document.createElement("prefix");  
newnaiElement.appendChild(prefixElement);  
  
Element realmElement = document.createElement("realm");  
newnaiElement.insertBefore(realmElement, prefixElement);  
  
Element usernameElement = document.createElement("username");  
newnaiElement.insertBefore(usernameElement, realmElement);  
  
Element ttlsElement = document.createElement("ttls");  
ttlsElement.setAttribute("active", "1");  
neweapElement.insertBefore(ttlsElement, certificateElement);  
Log.d("jcmtest", "readFileData\*\*\*\*\*\*\*\*3");  
Element outerNaiTypemElement = document  
.createElement("outerNaiType");  
ttlsElement.appendChild(outerNaiTypemElement);  
  
Element passwordeElement = document.createElement("password");  
ttlsElement.insertBefore(passwordeElement, outerNaiTypemElement);  
  
Element typeeElement = document.createElement("type");  
ttlsElement.insertBefore(typeeElement, passwordeElement);  
  
TransformerFactory transformerFactory = TransformerFactory  
.newInstance();  
Transformer transformer = transformerFactory.newTransformer();  
DOMSource domSource = new DOMSource(document);  
transformer.setOutputProperty(OutputKeys.ENCODING, ENCODING);  
transformer.setOutputProperty(OutputKeys.INDENT, "yes");  
transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");  
Log.d("jcmtest", "readFileData\*\*\*\*\*\*\*\*4");  
File file = new File(FILE\_PATH);  
FileOutputStream out = new FileOutputStream(file);  
StreamResult xmlResult = new StreamResult(out);  
transformer.transform(domSource, xmlResult);  
Log.d("jcmtest", "readFileData\*\*\*\*\*\*\*\*5");  
\} catch (Exception ex) \{  
System.out.println(ex.getMessage());  
  
Log.d("jcmtest", "readFileData\*\*\*\*\*\*\*\*6");  
return -1;  
\}  
  
return 0;

根据xml 中的结点数据信息去删除某个结点信息

public int onDeleChannel(Intent intent, int flag) \{  
try \{  
  
int lenth = 0;  
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
DocumentBuilder db = dbf.newDocumentBuilder();  
Document document = db.parse(new File(FILE\_PATH));  
Element ndssElement = (Element) document.getElementsByTagName(  
"ndss").item(0);  
Element root = document.getDocumentElement();  
NodeList nodes = root.getElementsByTagName("ndss");  
for (int i = 0; i < nodes.getLength(); i++) \{  
Element channelElement = (Element) (nodes.item(i));  
int oldlenth = channelElement.getElementsByTagName("channel")  
.getLength();  
lenth = oldlenth;  
  
ArrayList<String> infoList = new ArrayList<String>();  
  
infoList = intent.getStringArrayListExtra("position");  
  
for (String temp : infoList) \{  
for (int i1 = 0; i1 < lenth; i1++) \{  
  
Element channelData = (Element) channelElement  
.getElementsByTagName("channel").item(i1);  
if (intent != null) \{  
  
if (temp.equals(channelData.getAttribute("id"))) \{  
ndssElement.removeChild(channelData);  
  
\}  
\}  
int currentLenth = channelElement.getElementsByTagName(  
"channel").getLength();  
lenth = currentLenth;  
\}  
\}  
\}  
TransformerFactory transformerFactory = TransformerFactory  
.newInstance();  
Transformer transformer = transformerFactory.newTransformer();  
DOMSource domSource = new DOMSource(document);  
// 设置编码类型  
transformer.setOutputProperty(OutputKeys.ENCODING, ENCODING);  
transformer.setOutputProperty(OutputKeys.INDENT, "yes");  
transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");  
File file = new File(FILE\_PATH);  
FileOutputStream out = new FileOutputStream(file);  
StreamResult xmlResult = new StreamResult(out);  
transformer.transform(domSource, xmlResult);  
out.close();  
\} catch (Exception ex) \{  
System.out.println(ex.getMessage());  
  
\} finally \{  
this.stopSelf();  
Log.d("jcmtest", "delete .......finished");  
\}  
  
return 0;  
\}

增加结点信息。

public int onaddChannel(Intent intent) \{  
  
try \{  
  
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
DocumentBuilder db = dbf.newDocumentBuilder();  
Document document = db.parse(new File(FILE\_PATH));  
  
Element channelElement = document.createElement("channel");  
channelElement.setAttribute("id", intent.getExtra("index", 00)  
.toString());  
channelElement.setAttribute("bandwidth",  
intent.getExtra("bandwidth", "00").toString());  
channelElement.setAttribute("fft", "1024");  
channelElement.setAttribute("frequency",  
intent.getExtra("frequency", "00").toString());  
Element ndssElement = (Element) document.getElementsByTagName(  
"ndss").item(0);  
ndssElement.appendChild(channelElement);  
  
TransformerFactory transformerFactory = TransformerFactory  
.newInstance();  
Transformer transformer = transformerFactory.newTransformer();  
DOMSource domSource = new DOMSource(document);  
// 设置编码类型  
transformer.setOutputProperty(OutputKeys.ENCODING, ENCODING);  
transformer.setOutputProperty(OutputKeys.INDENT, "yes");  
transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");  
File file = new File(FILE\_PATH);  
FileOutputStream out = new FileOutputStream(file);  
StreamResult xmlResult = new StreamResult(out);  
transformer.transform(domSource, xmlResult);  
out.close();  
\} catch (Exception ex) \{  
System.out.println(ex.getMessage());  
  
\} finally \{  
this.stopSelf();  
\}  
  
return 0;  
\}

修改结点信息

private List<Channel> onChangeAuthentication(Intent intent) \{  
// TODO Auto-generated method stub  
Log.d("jcmtest", "onChangeAuthentication");  
try \{  
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();  
DocumentBuilder db = dbf.newDocumentBuilder();  
Document document = db.parse(new File(FILE\_PATH));  
int eapLenth = document.getElementsByTagName("eap").getLength();  
if (eapLenth == 0 || eapLenth < 0) \{  
if (onCreateEap() < 0) \{  
Log.d("jcmtest", "===create node error!!!!!!!!!!!!");  
\}  
\}  
Element prefixelement = (Element) document.getElementsByTagName("prefix").item(0);  
prefixelement.setTextContent(intent.getStringExtra("prefix"));  
  
Element realmelement = (Element) document.getElementsByTagName("realm").item(0);  
realmelement.setTextContent(intent.getStringExtra("realm"));  
  
Element usernameelement = (Element) document.getElementsByTagName("username").item(0);  
usernameelement.setTextContent(intent.getStringExtra("username"));  
  
Element outerNaiTypelement = (Element) document .getElementsByTagName("outerNaiType").item(0);  
outerNaiTypelement.setTextContent(intent.getStringExtra("outerNaiType"));  
  
Element passwordelement = (Element) document.getElementsByTagName("password").item(0);  
passwordelement.setTextContent(intent.getStringExtra("passwordelement"));  
  
Element eapelement = (Element) (Element) document  
.getElementsByTagName("eap").item(0);  
Element ttlselement = (Element) (Element) document  
.getElementsByTagName("ttls").item(0);  
if ("Disable".equals(intent.getStringExtra("authentype")))\{  
eapelement.setAttribute("active", "0");  
\}else if ("TLS".equals(intent.getStringExtra("authentype"))) \{  
eapelement.setAttribute("active", "1");  
ttlselement.setAttribute("active", "0");  
\} if ("TTLS".equals(intent.getStringExtra("authentype"))) \{  
eapelement.setAttribute("active", "1");  
ttlselement.setAttribute("active", "1");  
\}  
if (intent.getStringExtra("certificationpath") != null) \{  
if ("root".equals(intent.getStringExtra("certificate"))) \{  
Element certificateElement = (Element) document  
.getElementsByTagName("root-certificate").item(0);  
if (certificateElement==null)\{  
certificateElement = document  
.createElement("root-certificate");  
certificateElement.setAttribute("encoding", "pem");  
eapelement.insertBefore(certificateElement, eapelement.getElementsByTagName("nai").item(0));  
\}  
certificateElement.setTextContent(readFileData(intent  
.getStringExtra("certificationpath")));  
\}else if ("user".equals(intent.getStringExtra("certificate")))\{  
Element certificateElement = (Element) document  
.getElementsByTagName("user-certificate").item(0);  
if (certificateElement==null)\{  
certificateElement = document  
.createElement("user-certificate");  
certificateElement.setAttribute("encoding", "pem");  
eapelement.insertBefore(certificateElement, eapelement.getElementsByTagName("nai").item(0));  
\}  
certificateElement.setTextContent(readFileData(intent  
.getStringExtra("certificationpath")));  
\}else if ("userkey".equals(intent.getStringExtra("certificate")))\{  
Element certificateElement = (Element) document  
.getElementsByTagName("userkey-certificate").item(0);  
if (certificateElement==null)\{  
certificateElement = document  
.createElement("userkey-certificate");  
certificateElement.setAttribute("encoding", "pem");  
eapelement.insertBefore(certificateElement, eapelement.getElementsByTagName("nai").item(0));  
\}  
certificateElement.setTextContent(readFileData(intent  
.getStringExtra("certificationpath")));  
\}  
\}  
  
  
TransformerFactory transformerFactory = TransformerFactory  
.newInstance();  
Transformer transformer = transformerFactory.newTransformer();  
DOMSource domSource = new DOMSource(document);  
  
transformer.setOutputProperty(OutputKeys.ENCODING, ENCODING);  
transformer.setOutputProperty(OutputKeys.INDENT, "yes");  
transformer.setOutputProperty(OutputKeys.STANDALONE, "yes");  
File file = new File(FILE\_PATH);  
FileOutputStream out = new FileOutputStream(file);  
  
StreamResult xmlResult = new StreamResult(out);  
transformer.transform(domSource, xmlResult);  
Log.d("jcmtest", "the node is exist ?===\*\*\*\*\*\*\*\*\*\*\*\*\*4\*\*\*\*");  
out.close();  
\} catch (Exception ex) \{  
// System.out.println(ex.getMessage());  
ex.printStackTrace();  
Log.d("jcmtest", "ex.getMessage() = "+ex.getMessage());  
\} finally \{  
Log.d("jcmtest", "finally");  
this.stopSelf();  
\}  
return null;  
\}