Java通过XPath获取XML文件中符合特定条件的节点

import javax.xml.xpath.xpath;

import javax.xml.xpath.xpathconstants;

import javax.xml.xpath.xpathexpressionexception;

import javax.xml.xpath.xpathfactory;

import org.eclipse.swt.widgets.shell;

import org.eclipse.swt.widgets.text;

import org.w3c.dom.element;

string value = new string( "test" );

xpath xpath = xpathfactory.newinstance().newxpath();

string expression = "//elementname[@modulename='" + value + "']" ;

element element = null ;

try {

  element = (element) xpath.evaluate(expression, document,

   xpathconstants.node);

} catch (xpathexpressionexception e) {

  e.printstacktrace();

}