本文主要是介绍利用dom4j解析xml，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
引言
最近有个项目需要解析xml 文件，获取其中的节点内容， 小编选择了一个编码简单又高效的dom4j来完成。
1、xml内容
<?xml version="1.0" encoding="UTF-8"?>
<RecognizeResult><Speech Uri="/Sub/2019-12-03.3/file/5149-15892322607-20191202141010-rJKTcXfpB_datang.wav" Duration="252840"><ResultCode>0</ResultCode><Confidence>100</Confidence><Subject Name="RecognizeText"><Role Name="R0"><EndPoint Count="44"><Item Begin="13340" End="13450"><Text>喂。 </Text><Time>13340,13450 </Time></Item><Item Begin="15860" End="16240"><Text>喂。 </Text><Time>15860,16240 </Time></Item></EndPoint></Role><Role Name="R1"><EndPoint Count="35"><Item Begin="17990" End="20080"><Text>哎 喂 是 王 斌 先生 是吗 啊！ </Text><Time>17990,18100 18100,18340 18340,18550 18550,18940 18940,19120 19120,19510 19510,19820 19860,20080 </Time></Item><Item Begin="20630" End="21190"><Text>对 是啊！ </Text><Time>20630,20860 20860,21190 </Time></Item></EndPoint></Role></Subject></Speech>
</RecognizeResult>需求是，将其中的汉子分角色（R0,R1）解析出来，并且拼接成字符串，然后发送给消息队列。
2、引入jar包
<dependency><groupId>dom4j</groupId><artifactId>dom4j</artifactId><version>1.6.1</version></dependency>
3、代码实现
package com.zj.zhijian.service;import com.zqf.common.utils.DateUtils;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;/*** @author zhenghao* @description: 解析xml* @date 2019/12/318:33*/
@Service
public class ParseXmlService {private static Logger log = LoggerFactory.getLogger(ParseXmlService.class);@Value("${base.file.path}")private String baseFilePath;//获得文件 测试方法public void xmlFile() {//String toDayStartYMD = DateUtils.getToDayStartYMD();String date = "2019-12";for (int j = 1; j <= 4; j++) {String toDayStartYMD = date + "-0" + j;for (int i = 0; i < 24; i++) {String filePath = baseFilePath + toDayStartYMD + "." + i + "/file/";log.info("文件路径" + filePath);parseXml(filePath);}}}public void parseXml(String strFile) {try {long l = System.currentTimeMillis();List<String> R0List = new ArrayList<>();List<String> R1List = new ArrayList<>();File file = new File(strFile);String[] filePath = file.list();if (filePath == null || filePath.length <= 0) {return;}log.info("xml个数" + filePath.length);for (String s : filePath) {if (!s.contains(".xml")) {continue;}String tempFilePath = strFile + s;//1.创建Reader对象SAXReader reader = new SAXReader();//2.加载xmlDocument document = reader.read(new File(tempFilePath));//3.获取根节点Element rootElement = document.getRootElement();StringBuilder sb = new StringBuilder();//4、获得指定子节点Element speechElement = rootElement.element("Speech");//5、获得节点属性Attribute duration = speechElement.attribute("Duration");String value = duration.getValue();int telLength = Integer.valueOf(value) / 1000;if (telLength <= 45) {continue;}//默认返回第一节点Element subjectElement = speechElement.element("Subject");if (subjectElement == null) {continue;}Iterator iterator3 = subjectElement.elementIterator();while (iterator3.hasNext()) {Element roleElement = (Element) iterator3.next();Attribute name = roleElement.attribute("Name");Element endPointElement = roleElement.element("EndPoint");//获得所有子节点Iterator iterator1 = endPointElement.elementIterator();while (iterator1.hasNext()) {Element itemElement = (Element) iterator1.next();Element textElement = itemElement.element("Text");String stringValue = textElement.getStringValue();if (name.getValue().equals("R0")) {sb.append(stringValue);R0List.add(stringValue);} else {R1List.add(stringValue);}}}}System.out.println(System.currentTimeMillis() - l);} catch (DocumentException e) {e.printStackTrace();}}4、多种解析xml方式对比，请参考下面文章
https://blog.csdn.net/hao134838/article/details/103402694
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