XpathTest.java
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package com.ecar.apm;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.HashMap;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;
import org.apache.commons.io.IOUtils;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.springframework.util.ResourceUtils;
public class XpathTest {
public static void main(String[] args) throws Exception{
readXmlByJavax();
}
public static void readXmlByDom4j() throws Exception{
InputStream is = new FileInputStream(ResourceUtils.getFile("classpath:xpath.html"));
String xml = IOUtils.toString(is,"utf8");
xml = xml.replaceAll(" "," ").replaceAll("»", "");
Document doc = DocumentHelper.parseText(xml);
//SAXReader saxReader = new SAXReader();
// Document doc = saxReader.read(ResourceUtils.getFile("classpath:xpath.html"));
HashMap<String,String> variableResult = new HashMap<String,String>();
HashMap<String, String> variables = new HashMap<String, String>();
variables.put("$a", "//input[@name='_csrf']");
variables.put("$b", "//meta[@name='X-CSRF-TOKEN']/@content");
variables.put("$c", "/html/head/title");
for (String variableName : variables.keySet()) {
String variablePath = variables.get(variableName);
Node node = doc.selectSingleNode(variablePath);
String variableValue = null;
if(node!=null){
variableValue = node.getText();
}
variableResult.put(variableName, variableValue);
}
for (String name : variableResult.keySet()) {
System.out.println(name+ ":"+ variableResult.get(name));
}
}
public static void readXmlByJavax() throws Exception{
HashMap<String,String> variableResult = new HashMap<String,String>();
HashMap<String, String> variables = new HashMap<String, String>();
variables.put("$a", "//input[@name='_csrf']");
variables.put("$b", "//meta[@name='X-CSRF-TOKEN']/@content");
variables.put("$c", "/html/head/title");
InputStream is = new FileInputStream(ResourceUtils.getFile("classpath:xpath.html"));
String body = IOUtils.toString(is,"utf8");
body = body.replaceAll(" ","&nbsp;").replaceAll("»", "");
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
org.w3c.dom.Document doc = builder.parse(IOUtils.toInputStream(body, "UTF-8"));
XPathFactory xPathfactory = XPathFactory.newInstance();
for (String variableName : variables.keySet()) {
String variablePath = variables.get(variableName);
XPath xpath = xPathfactory.newXPath();
XPathExpression expr = xpath.compile(variablePath);
// TODO Retrieve whole XML fragment
String variableValue = expr.evaluate(doc);
variableResult.put(variableName, variableValue);
}
for (String name : variableResult.keySet()) {
System.out.println(name+ ":"+ variableResult.get(name));
}
}
}