Custom class Library: Java transformation XML file conversion Pojo tool

First, when Java read the XML configuration file, always through the dom4j third-party library actively resolved, recently discovered that the JDK class library can be converted to Pojo XML.

Ii. Writing XML conversion tool class Xmlutils

Package Com.moy.demo.common.utils;import Javax.xml.bind.jaxbcontext;import javax.xml.bind.unmarshaller;import Java.io.inputstream;import Java.io.reader;import Java.io.StringReader;/** * [project]:cloud-demo-master <br/> * [email]:[email protected] <br/> * [Date]:2018/4/30 <br/> * [Description]: <br/> * * @author Yexiangyang*/ Public Abstract classXmlutils { Public Static<T> T xmlfiletoobject (String Xmlfilepath, class<t>clazz) {ClassLoader Contextclassloader=Thread.CurrentThread (). Getcontextclassloader (); Try(InputStream InputStream =Contextclassloader.getresourceasstream (Xmlfilepath)) {Jaxbcontext Context=jaxbcontext.newinstance (Clazz); Unmarshaller Unmarshaller=Context.createunmarshaller (); T result=(T) Unmarshaller.unmarshal (InputStream); returnresult; } Catch(Exception e) {Throw NewRuntimeException ("convert XML to POJO failure!", E); }    }     Public Static<T> T xmlstringtoobject (String xmlstring, class<t>clazz) {        Try(Reader reader =NewStringReader (xmlstring)) {Jaxbcontext Context=jaxbcontext.newinstance (Clazz); Unmarshaller Unmarshaller=Context.createunmarshaller (); T result=(T) Unmarshaller.unmarshal (reader); returnresult; } Catch(Exception e) {Throw NewRuntimeException ("Convert XML string to POJO failure!", E); }    }}

Second, the test

A, the first step: Define an XML configuration file such as: Citylist.xml

<?XML version= "1.0" encoding= "UTF-8"?><CC1= "0">    <DD1= "101020100"D2= "Shanghai"D3= "Shanghai"D4= "Shanghai"/>    <DD1= "101220101"D2= "Hefei"D3= "Hefei"D4= "Anhui"/>    <DD1= "101190101"D2= "Nanjing"D3= "Jiangshu"D4= "Jiangsu"/>    <DD1= "101010100"D2= "Beijing"D3= "Beijing"D4= "Beijing"/>    <DD1= "101270101"D2= "Chengdu"D3= "Chengdu"D4= "Sichuan"/></C>

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B, Step two: Write the XML corresponding entity city and CityList, and add the corresponding annotations

Package Com.moy.demo.common.utils;import Javax.xml.bind.annotation.xmlaccesstype;import Javax.xml.bind.annotation.xmlaccessortype;import Javax.xml.bind.annotation.xmlattribute;import javax.xml.bind.annotation.XmlRootElement;/** * [project]:cloud-demo-master <br/> * [email]:[email protected] <br/> * [Date]:2018/4/30 <br/> * [Description]: <br/> * * @author Yexiangyang*/@XmlRootElement (Name="D") @XmlAccessorType (Xmlaccesstype.field) Public classCity {@XmlAttribute (name="D1")    PrivateString Cityid; @XmlAttribute (Name="D2")    PrivateString CityName; @XmlAttribute (Name="D3")    PrivateString Citycode; @XmlAttribute (Name="D4")    PrivateString Province;  PublicString Getcityid () {returnCityid; }     Public voidSetcityid (String Cityid) { This. Cityid =Cityid; }     PublicString Getcityname () {returnCityName; }     Public voidsetcityname (String cityname) { This. CityName =CityName; }     PublicString Getcitycode () {returnCitycode; }     Public voidSetcitycode (String citycode) { This. Citycode =Citycode; }     PublicString getprovince () {returnProvince; }     Public voidsetprovince (String province) { This. Province =Province; } @Override PublicString toString () {return "city{"+"cityid= '"+ Cityid +'\ ''+", Cityname= '"+ CityName +'\ ''+", citycode= '"+ Citycode +'\ ''+", province= '"+ Province +'\ ''+'}'; }}

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Package Com.moy.demo.common.utils;import Javax.xml.bind.annotation.xmlaccesstype;import Javax.xml.bind.annotation.xmlaccessortype;import Javax.xml.bind.annotation.xmlelement;import Javax.xml.bind.annotation.xmlrootelement;import java.util.List;/** * [project]:cloud-demo-master <br/> * [email]:[email protected] <br/> * [Date]:2018/4/30 <br/> * [Description]: <br/> * * @author Yexiangyang*/@XmlRootElement (Name="C") @XmlAccessorType (Xmlaccesstype.field) Public classcitylist {@XmlElement (name="D")    PrivateList<city>CityList;  PublicList<city>getcitylist () {returnCityList; }     Public voidSetcitylist (list<city>citylist) {         This. CityList =CityList; } @Override PublicString toString () {return "citylist{"+"citylist="+ CityList +'}'; }}

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C, write unit test xmlutilstest

Package Com.moy.demo.common.utils;import Org.junit.test;importStaticorg.junit.assert.*;/** [Project]:d emo-master <br/> * [email]:[email protected] <br/> * [DATE]:2018/5/2 <br/> * [Desc Ription]: <br/> * * @author Yexiangyang*/ Public classxmlutilstest {@Test Public voidXmlfiletoobject () {citylist citylist= Xmlutils.xmlfiletoobject ("Citylist.xml", CityList.class); System. out. println (CityList); } @Test Public voidXmlstringtoobject () {String xmlstring="<?xml version=\ "1.0\" encoding=\ "utf-8\"? >\n"+"<c c1=\ "0\" >\n"+"<d d1=\ "101020100\" d2=\ "Shanghai \" d3=\ "shanghai\" d4=\ "shanghai \"/>\n"+"<d d1=\ "101220101\" d2=\ "Hefei \" d3=\ "hefei\" d4=\ "Anhui \" />\n"+"<d d1=\ "101190101\" d2=\ "nanjing \" d3=\ "jiangshu\" d4=\ "Jiangsu \" />\n"+"<d d1=\ "101010100\" d2=\ "Beijing \" d3=\ "beijing\" d4=\ "Beijing \"/>\n"+"<d d1=\ "101270101\" d2=\ "Chengdu \" d3=\ "chengdu\" d4=\ "Sichuan \" />\n"+"</c>"; CityList CityList= Xmlutils.xmlstringtoobject (xmlstring, CityList.class); System. out. println (CityList); }}

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Yexiangyang

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Custom class Library: Java transformation XML file conversion Pojo tool