java sax 解析任何一个xml_JAVA题目，用SAX解析一篇XML

短命女 2022-11-03 04:20 205阅读 0赞

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37.读取XML数据库e68a84e8a2ad3231313335323631343130323136353331333262343134

/\*

import java.io.\*;

import javax.xml.parsers.\*;

import org.w3c.dom.\*;

private static Document document;

private static Element node;

\*/

File xml\_file = new File(%%1);

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

try \{

DocumentBuilder builder = factory.newDocumentBuilder();

document = builder.parse(xml\_file);

\} catch (Exception e) \{

e.printStackTrace();

String subNodeTag = %%2;

Element rootNode = document.getDocumentElement();

//%%2="Product" //%%4="id" //%%6="port"

//%%3="Name" //%%5="001"

NodeList nlist = rootNode.getElementsByTagName(subNodeTag);

int len = nlist.getLength();

for (int i = 0; i < len; i++) \{

node = nlist.item(i);

String getNodeAttrValue = null;

NamedNodeMap attrList = node.getAttributes();

for (int j = 0; j < attrList.getLength(); j++) \{

if (attrList.item(j).getNodeName().equals(%%4)) \{

getNodeAttrValue = attrList.item(j).getNodeValue();

break;

if (getNodeAttrValue.equals(%%5)) \{

nlist = node.getChildNodes();

String %%9=((Element) node).getElementsByTagName(%%3).item(0)

.getFirstChild().getNodeValue();

break;

38.写入XML数据库

/\*

import java.io.\*;

import javax.xml.parsers.\*;

import org.w3c.dom.\*;

import javax.xml.transform.\*;

import javax.xml.transform.dom.\*;

import javax.xml.transform.stream.\*;

private Document document;

private Element node;

\*/

File xml\_file = new File(%%1);

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();

try \{

DocumentBuilder builder = factory.newDocumentBuilder();

document = builder.parse(xml\_file);

\} catch (Exception e) \{

e.printStackTrace();

String subNodeTag = %%2;

Element rootNode = document.getDocumentElement();

// %%2="Product" //%%4="pid" //%%6="author"

// %%3="Name" //%%5="price"

NodeList nlist = rootNode.getElementsByTagName(subNodeTag);

String ss = null;

int len = nlist.getLength();

for (int i = 0; i < len; i++) \{

node = (Element) nlist.item(i);

//node.setAttribute(%%4, "0"+String.valueOf(i)); //ID格式化

String getNodeAttrValue = null;

NamedNodeMap attrList = node.getAttributes();

for (int j = 0; j < attrList.getLength(); j++) \{

if (attrList.item(j).getNodeName().equals(%%4)) \{

getNodeAttrValue = attrList.item(j).getNodeValue();

break;

if (getNodeAttrValue.equals("001")) \{

nlist = node.getChildNodes();

ss = ((Element) node).getElementsByTagName(%%3).item(0)

.getFirstChild().getNodeValue();

ss = ((Element) node).getElementsByTagName(%%6).item(0)

.getFirstChild().getNodeValue();

ss = ((Element) node).getElementsByTagName(%%5).item(0)

.getFirstChild().getNodeValue();

((Element) node).getElementsByTagName(%%3).item(0)

.getFirstChild().setTextContent(%%7);

((Element) node).getElementsByTagName(%%6).item(0)

.getFirstChild().setTextContent(%%8);

((Element) node).getElementsByTagName(%%5).item(0)

.getFirstChild().setTextContent(%%9);

break;

if (ss == null) \{

node = document.createElement(%%2);

node.setAttribute(%%4, String.valueOf(nlist.getLength() + 1));

node.appendChild(document.createTextNode("\\n"));

Element server = document.createElement(%%3);

server.appendChild(document.createTextNode(%%7));

node.appendChild(server);

Element ipNode = document.createElement(%%6);

ipNode.appendChild(document.createTextNode(%%8));

node.appendChild(ipNode);

node.appendChild(document.createTextNode("\\n"));

Element port = document.createElement(%%5);

port.appendChild(document.createTextNode(%%9));

node.appendChild(port);

node.appendChild(document.createTextNode("\\n"));

rootNode.appendChild(node);

TransformerFactory tFactory = TransformerFactory.newInstance();

Transformer transformer = null;

try \{

transformer = tFactory.newTransformer();

DOMSource source = new DOMSource(document);

StreamResult result = new StreamResult(xml\_file);

transformer.transform(source, result);

\} catch (Exception e) \{

e.printStackTrace();

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