各位，我写了一个把包含XML信息的String转化成Docuemnt对象的方法，为什么总是不对啊？

问题描述

package com.unittest;import java.io.ByteArrayInputStream;import java.io.IOException;import java.io.StringReader;import javax.xml.parsers.DocumentBuilder;import javax.xml.parsers.DocumentBuilderFactory;import javax.xml.parsers.ParserConfigurationException;import junit.framework.TestCase;import org.w3c.dom.Document;import org.w3c.dom.Element;import org.xml.sax.InputSource;import org.xml.sax.SAXException;public class StringXMLTest extends TestCase {public void testConsole(){String xml1 = "<CODEITEM><ID>10004</ID><NAME>4</NAME><CONTENT>it is the 4th item</CONTENT></CODEITEM>";String xml2 = "<CODEITEM><ID>10004</ID><NAME>4</NAME><CONTENT>这是第4个item。</CONTENT></CODEITEM>";String xml3 = "<CODEITEM><ID><![CDATA[10004]]></ID><NAME><![CDATA[4]]></NAME><CONTENT><![CDATA[这是第4个item。]]></CONTENT></CODEITEM>";String xml4 = "<?xml version="1.0" encoding="UTF-8" standalone="no"?><CODEITEM><ID><![CDATA[10004]]></ID><NAME><![CDATA[4]]></NAME><CONTENT><![CDATA[这是第4个item。]]></CONTENT></CODEITEM>";String[] xml = new String[]{xml1,xml2,xml3,xml4};Document doc;Element root;String id,name,content;try {for (int i = 0; i < xml.length; i++) {System.out.println("xml" + (i+1) + ":");System.out.println("method1:");doc = transferStringToDocument1(xml[i]);root = (Element) doc.getElementsByTagName("CODEITEM").item(0);id = root.getAttribute("ID");name = root.getAttribute("NAME");content = root.getAttribute("CONTENT");System.out.println("id = " + id);System.out.println("name = " + name);System.out.println("content = " + content);System.out.println("method2:");doc = transferStringToDocument2(xml[i]);root = (Element) doc.getElementsByTagName("CODEITEM").item(0);id = root.getAttribute("ID");name = root.getAttribute("NAME");content = root.getAttribute("CONTENT");System.out.println("id = " + id);System.out.println("name = " + name);System.out.println("content = " + content + "n");}} catch (Exception e) {e.printStackTrace();}}private Document transferStringToDocument1(String s) throws ParserConfigurationException, SAXException, IOException{StringReader reader = new StringReader(s);InputSource is = new InputSource(reader);DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();Document doc = builder.parse(is);return doc;}private Document transferStringToDocument2(String s) throws ParserConfigurationException, SAXException, IOException{DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();Document doc = builder.parse(new ByteArrayInputStream(s.getBytes()));return doc;}}

解决方案

获取结果的方法错了应该是id = root.getFirstChild().getTextContent(); name = root.getChildNodes().item(1).getTextContent(); content = root.getChildNodes().item(2).getTextContent(); transferStringToDocument2 这个方法和当明编码格式有关最好不要用
解决方案二：
root = (Element) doc.getFirstChild();Element idElement = (Element) root.getElementsByTagName("ID").item(0);Element nameElement = (Element) root.getElementsByTagName("NAME").item(0);Element contentElement=(Element) root.getElementsByTagName("CONTENT").item(0);id = idElement.getTextContent();name = nameElement.getTextContent();content = contentElement.getTextContent();