Convert XML to JavaBean using DOM4J and reflection mechanisms



Import Java.io.File;
Import Java.io.FileWriter;
Import Java.lang.reflect.Field;
Import Java.lang.reflect.Method;
Import Java.sql.Timestamp;
Import Java.text.DateFormat;
Import Java.text.SimpleDateFormat;
Import java.util.ArrayList;
Import Java.util.Iterator;
Import java.util.List;

Import org.dom4j.Document;
Import Org.dom4j.DocumentHelper;
Import org.dom4j.Element;
Import Org.dom4j.io.OutputFormat;
Import Org.dom4j.io.SAXReader;
Import Org.dom4j.io.XMLWriter;

/**
* Tool class for converting between XML and JavaBean
* @author
* @param <T>
*/
public class Beanxmlutils<t> {
private static DateFormat DF = new SimpleDateFormat ("Yyyy-mm-dd");
/**
* * @param obj Generic Object
* @param the list collection of Entitypropertys generic objects
* @param Encode XML custom encoding type (recommended with GBK)
* @param the path and file name of the Xmlpathandname XML file
*/
public void Writexmldocument (T obj, list<t> entitypropertys, String encode,string xmlpathandname) {
Long lasting = System.currenttimemillis ();//Efficiency detection
try {
XMLWriter writer = null;//declares an object that writes XML
OutputFormat format = Outputformat.createprettyprint ();
Format.setencoding (Encode);//Set the encoding format of the XML file
String FilePath = xmlpathandname;//Get file address
File File = new file (filePath);//Get Files
if (file.exists ()) {
File.delete ();
}
Create a new Student.xml file and add new content
Document document = Documenthelper.createdocument ();
String rootname = Obj.getclass (). Getsimplename ();//Get class name
Element root = document.addelement (Rootname + "s");//Add root node
Field[] Properties = Obj.getclass (). Getdeclaredfields ();//Get all the properties of an entity class
for (T T:entitypropertys) {
Recursive entities
Element secondroot = root.addelement (rootname);
Level Two node
for (int i = 0; i < properties.length; i++) {
Reflection Get Method
Method meth = T.getclass (). GetMethod ("Get" + properties[i].getname (). substring (0, 1). toUpperCase () + properties[i]. GetName (). substring (1));
Add an attribute to a level two node with the value of the corresponding property
Secondroot.addelement (Properties[i].getname ()). SetText (Meth.invoke (t). toString ());
}
}
Generating an XML file
writer = new XMLWriter (new FileWriter (file), format);
Writer.write (document);
Writer.close ();
Long lasting2 = System.currenttimemillis ();
System.out.println ("Write XML file end, time elapsed" + (lasting2-lasting) + "MS");
} catch (Exception e) {
SYSTEM.OUT.PRINTLN ("XML file Write Failed");
}

}
/**
* @param the path and address of the Xmlpathandname xmlpathandname XML file
* @param-T generic Object
* @return
*/
Public list<t> ReadXML (String objnodestr,string xmlstr, T t) {
Long lasting = System.currenttimemillis ();//Efficiency detection
list<t> list = new arraylist<t> ();//Create List collection
try {
File F = new file (xmlpathandname);//Read files
Saxreader reader = new Saxreader ();
Document doc = Reader.read (f);//DOM4J read
/* Document doc = null;
The following is the parsing of XML strings by the
doc = Documenthelper.parsetext (xmlpathandname); To convert a string to XML
*/
File F = new file (xmlpathandname);//Read files
Saxreader reader = new Saxreader ();
Document doc = Reader.read (f);//DOM4J read
Document doc = Documenthelper.parsetext (XMLSTR);
Element root = Doc.getrootelement ();//Get root node
Element Dataele = root.element ("Data"); Gets the child node under the root node data
Element Yhjzpbele = dataele.element (TR1); Gets the child node under the data node YHJZPB
Element foo;//Level Two node
Field[] Properties = T.getclass (). Getdeclaredfields ();//Get the properties of an instance
The Get method of the instance
Method Getmeth;
The set method of the instance
Method Setmeth;
System.out.println (T.getclass (). Getsimplename ());
String text = Yhjzpbele.gettext ();
System.err.println (text);
for (Iterator i = Root.elementiterator (OBJNODESTR); I.hasnext ();) {
Traverse the T.getclass (). Getsimplename () node
Foo = (Element) i.next ();//Next Level two node
t= (T) T.getclass (). newinstance ();//Get a new instance of the object
for (int j = 0; J < Properties.length; J + +) {
Traverse all grandchild nodes
The set method of the instance
Setmeth = T.getclass (). GetMethod ("set" + properties[j].getname (). substring (0, 1). toUpperCase () + properties[j]. GetName (). substring (1), Properties[j].gettype ());
Properties[j].gettype () is the parameter type of the Set method entry parameter (class type)
System.err.println (Properties[j].gettype ());
String proname = Properties[j].getname (). toUpperCase ();//class Property name string
Object setstr = Foo.elementtext (proname);
if (Properties[j].gettype () ==java.sql.timestamp.class && foo.elementtext (proname) = null) {
Timestamp ts = new Timestamp (Df.parse (Foo.elementtext (Proname)). GetTime ());
SETSTR = ts;
}
if (Properties[j].gettype () ==int.class) {
if (Foo.elementtext (proname) = null &&! "". Equals (Foo.elementtext (proname))) {
int Intts = Integer.parseint (Foo.elementtext (proname));
Setstr = Intts;
}else{
SETSTR = 0;
}
}
Setmeth.invoke (t, setstr);//The value of the corresponding node is stored
}
List.add (t);
}
} catch (Exception e) {
E.printstacktrace ();
}
Long lasting2 = System.currenttimemillis ();
SYSTEM.OUT.PRINTLN ("Read XML file end, time elapsed" + (lasting2-lasting) + "MS");
return list;
}

/*public static void Main (string[] args) {
String XML = new TestWebService (). ReadXML ("File/testbean.xml");
Beanxmlutils<xmlbean> beanxmlutils=new beanxmlutils<xmlbean> ();
Xmlbean testbean=new Xmlbean ();
List<xmlbean> list=beanxmlutils.readxml ("Record", Xml,testbean);
for (Xmlbean xb:list) {
System.out.println (Xb.getid ());
}
}*/
}

Convert XML to JavaBean using DOM4J and reflection mechanisms