在日常开发中经常碰到xml解析，现提供递归解析xml类以供参考
package cn.sunmeng;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
public class ParseXML {
private static final List ARRAY_PROPERTY = Arrays.asList(new String[]{"CustList","SMCust"});
private Map parserXml(String xml) throws Exception {
StringReader reader = new StringReader(xml);
// 创建一个新的SAXBuilder
SAXReader sb = new SAXReader();
//
Map result = new HashMap();
//
try {
// 通过输入源构造一个Document
Document doc = sb.read(reader);
// 取的根元素
Element root = doc.getRootElement();
List children = root.elements();
//解析xml
result = toMap(children,null);
} catch (Exception e) {
System.err.print(e.getMessage());
throw e;
} finally {
if(reader != null) {
reader.close();
}
}
return result;
}
private Map toMap(List elements,List> list){
//
Element el = null;
String name = "";
//
Map map = new HashMap();
//
for(int i=0; i
el = (Element) elements.get(i);
name = el.getName();
//如果是定义成数组
if(ARRAY_PROPERTY.contains(name)) {
//继续递归循环
List> sublist = new ArrayList>();
//
Map subMap = this.toMap(el.elements(),sublist);
//根据key获取是否已经存在
Object object = map.get(name);
//如果存在,合并
if(object !=null ){
List> olist = (List>)object;
olist.add(subMap);//
map.put(name, olist);
}else{//否则直接存入map
map.put(name, sublist);
}
}else {//单个值存入map
map.put(name,el.getTextTrim());
}
}
//存入list中
if(list!=null)
list.add(map);
//返回结果集合
return map;
}
private static String readXML() throws Exception{
//
StringBuilder sb = new StringBuilder();
//
File file = new File("E:\\xml.txt");
//
if(file.exists() && file.isFile()){
InputStreamReader rd = new InputStreamReader(new FileInputStream(file), "UTF-8");
BufferedReader bufferedReader = new BufferedReader(rd);
String str="";
while((str = bufferedReader.readLine()) != null){
sb.append(str);
}
rd.close();
}
//
return sb.toString();
}
public static void main(String[] args) {
//实例化对象
ParseXML parseXML = new ParseXML();
//获取xml
String xml = new String();
try {
xml = parseXML.readXML();
//解析xml
Map result = parseXML.parserXml(xml);
//打印输出
System.out.println(result);
} catch (Exception e) {
//
System.err.print(e.getMessage());
}
}
}
解析结果：
{
CustList=[
{
FName=SMFromUserName,
MType=SMMsgType,
TName=SMToUserName,
MId=SMMsgId1234567890123456,
Content=SMContent,
Code=00,
SrcLabel=SMSrcLabel,
CTime=SMCreateTime1348831860
},
{
FName=2SMFromUserName,
MType=2SMMsgType,
TName=2SMToUserName,
SMCust=[
{
SM1=sm1val,
SM2=sm2val
},
{
SM1=sm3val,
SM2=sm4val
}
],
MId=2SMMsgId1234567890123456,
Content=2SMContent,
Code=200,
SrcLabel=2SMSrcLabel,
CTime=2SMCreateTime1348831860
}
],
Content=Success,
Code=1200
}