Use Dom4j to parse XML files and dom4j to parse xml files

Use Dom4j to parse XML files and dom4j to parse xml files

Dom4j is a java xml api, similar to jdom, used to read and write XML files. It features excellent performance, powerful functionality, and easy to use.

Jar package: dom4j-1.6.1.jar

Xml file to be parsed: people. xml

1 <people city = "BeiJing"> 2 <student name = "Jack" age = "10"> My name is Jack! </Student> 3 <student name = "Lucy" age = "11"> My name is Lucy! </Student> 4 <student name = "James" age = "12"/> 5 <teacher name = "Jason" age = "25"> I am a teacher! </Teacher> 6 <teacher name = "Michael" age = "30"> I am a teacher too! </Teacher> 7 </people>People. xml

First, build a javabean Based on the xml document:

1 package bean; 2 3 import java. util. list; 4 5 public class People {6 private String city; 7 private List <Student> student; 8 private List <Teacher> teacher; 9 10 public String getCity () {11 return city; 12} 13 public void setCity (String city) {14 this. city = city; 15} 16 public List <Student> getStudent () {17 return student; 18} 19 public void setStudent (List <Student> student) {20 this. student = student; 21} 22 public List <Teacher> getTeacher () {23 return teacher; 24} 25 public void setTeacher (List <Teacher> teacher) {26 this. teacher = teacher; 27} 28}People. java 1 package bean; 2 3 public class Student {4 private String name; 5 private int age; 6 private String text; 7 public String getName () {8 return name; 9} 10 public void setName (String name) {11 this. name = name; 12} 13 public int getAge () {14 return age; 15} 16 public void setAge (int age) {17 this. age = age; 18} 19 public String getResult () {20 return text; 21} 22 public void setResult (String result) {23 this. text = result; 24} 25 public Student (String name, int age, String text) {26 super (); 27 this. name = name; 28 this. age = age; 29 this. text = text; 30} 31}Student. java 1 package bean; 2 3 public class Teacher {4 private String name; 5 private int age; 6 private String text; 7 public String getName () {8 return name; 9} 10 public void setName (String name) {11 this. name = name; 12} 13 public int getAge () {14 return age; 15} 16 public void setAge (int age) {17 this. age = age; 18} 19 public String getResult () {20 return text; 21} 22 public void setResult (String result) {23 this. text = result; 24} 25 public Teacher (String name, int age, String text) {26 super (); 27 this. name = name; 28 this. age = age; 29 this. text = text; 30} 31}Teacher. java

The parsing code is as follows:

1 package xml; 2 3 import java. io. file; 4 import java.net. URISyntaxException; 5 import java. util. arrayList; 6 import java. util. iterator; 7 import java. util. list; 8 9 import org. dom4j. document; 10 import org. dom4j. extends entexception; 11 import org. dom4j. element; 12 import org. dom4j. io. SAXReader; 13 14 import bean. people; 15 import bean. student; 16 import bean. teacher; 17 18 public class Dom4jParserXML {19 p Ublic static People parseXml (String xmlPath) {20 File xmlFile = new File (xmlPath); 21 System. out. println (xmlFile. getPath (); 22 23 if (xmlFile. exists () {24 SAXReader reader = new SAXReader (); 25 People people = new People (); 26 try {27 // read the Document stream 28 document Document document = reader. read (xmlFile); 29 // get the root node 30 Element root = document. getRootElement (); 31 32 List <Student> students = new ArrayList <Student> (); 33 L Ist <Teacher> teachers = new ArrayList <Teacher> (); 34 35 people. setCity (root. attributeValue ("city"); 36 // parse student node 37 for (Iterator <Element> iterator = root38. elementIterator ("student"); iterator. hasNext ();) {39 Element eStudent = iterator. next (); 40 String text = eStudent. getText (); 41 42 Student student = new Student (43 eStudent. attributeValue ("name"), 44 Integer. parseInt (eStudent. attributeValue ("Age"), text); 45 students. add (student); 46} 47 // parse teacher node 48 for (Iterator <Element> iterator = root49. elementIterator ("teacher"); iterator. hasNext ();) {50 Element eTeacher = iterator. next (); 51 String text = eTeacher. getText (); 52 53 Teacher teacher = new Teacher (54 eTeacher. attributeValue ("name"), 55 Integer. parseInt (eTeacher. attributeValue ("age"), text); 56 teachers. add (teacher); 57} 58 people. set Student (students); 59 people. setTeacher (teachers); 60 61 System. out. println ("Parse success! "); 62} catch (incluentexception e) {63 e. printStackTrace (); 64} 65 return people; 66} else {67 System. err. println ("File is not exist! "); 68 return null; 69} 70} 71 72 public static void main (String [] args) throws URISyntaxException {73 String xmlPath =" E: // xml // people. xml "; 74 System. out. println ("File full path is" + xmlPath); 75 // parse people. xml76 People p = parseXml (xmlPath); 77 78 // process the parsing result 79 System. out. println ("The city is:" + p. getCity (); 80 List <Student> sList = p. getStudent (); 81 List <Teacher> tList = p. getTeacher (); 82 for (Student s: sList) {83 System. out. println (s. getName () + "->" + s. getAge () + "->" + s. getResult (); 84} 85 for (Teacher t: tList) {86 System. out. println (t. getName () + "->" + t. getAge () + "->" + t. getResult (); 87} 88} 89}

Running result:

File full path is E: // xml // people. xmlE: \ xml \ people. xmlParse success! The city is: BeiJingJack-> 10-> My name is Jack! Lucy-> 11-> My name is Lucy! James-> 12-> Jason-> 25-> I am a teacher! Michael-> 30-> I am a teacher too!Result
Urgent, dom4j parses xml files

/**
*
*/
Package test. actions;

Import java. io. File;
Import java. util. List;

Import org. dom4j. Document;
Import org. dom4j. extends entexception;
Import org. dom4j. Element;
Import org. dom4j. Node;
Import org. dom4j. io. SAXReader;

/**
* @ Author Administrator
*
*/
Public class ParseXmlExample {

/**
* @ Param args
* The XML document you provide on Baidu has the format and extra spaces. Correct the document and resolve it again.
*/
Public static void main (String [] args ){
File file = new File ("your File path ");
ParseModelXml (file );
}

Private static void parseModelXml (File file ){
SAXReader reader = new SAXReader ();
Try {
// Get the XML Document Object
Document doc = reader. read (file );
// Obtain the root node
Element root = doc. getRootElement ();
String rootName = root. getName ();
List <Element> list = doc. selectNodes (rootName + "/*");
For (int I = 0; I <list. size (); I ++ ){
Element element = (Element) list. get (I );
WalkNodes (element );
}
} Catch (incluentexception e ){
E. printStackTrace ();
}
}
// Recursive Parsing
Private static void walkNodes (Element element ){

For (int I = 0; I <element. nodeCount (); I ++ ){
Node node = element. node (I );
System. out. println (node. getNodeTypeName ());
If (node instanceof Element ){
WalkNodes (Element) node );
} Else {
String str = node. getText (). trim ();
If (null = str ){
Str = "";
}
If (! "". Equals (str )){
System. out. println ("text is:" + str );
}
}
}
}
}... Remaining full text>

How to Use dom4j to parse multi-node xml files? Examples

According to your xml format. Save the preceding xml as bb. xml
SAXReader sax = new SAXReader ();
Document document = sax. read ("bb. xml ");
Element root = document. getRootElement ();

For (Iterator iter = root. elementIterator (); iter. hasNext ();){
Element vals = (Element) iter. next ();
System. out. println ("name =" + vals. getName ()
+ "\ T attribut ID =" + vals. attributeValue ("id "));
For (Iterator iterVal = vals. elementIterator (); iterVal
. HasNext ();){
Element valNode = (Element) iterVal. next ();
System. out. print ("\ t childName =" + valNode. getName ()
+ "\ T childValue =" + valNode. getText ());
System. out. println ();
}
}

If you change the xml format, save the file B. xml:
<RESULT>
<VALUE id = "13" type = "1">
<NO> 2 </NO>
<ADDR> test </ADDR>
</VALUE>
<VALUE id = "13" type = "2">
<NO> 2 </NO>
<ADDR> test </ADDR>
</VALUE>
</RESULT>

Resolution:
Document = sax. read ("B. xml ");
Root = document. getRootElement ();
List ls = root. selectNodes ("/RESULT/VALUE ");

For (int I = 0; I <ls. size (); I ++ ){
Element val = (Element) ls. get (I );
Element no = val. element ("NO ");
Element addr = val. element ("ADDR ");
System. out. println ("id =" + val. attributeValue ("id") + "\ t type ="
+ Val. attributeValue (... the remaining full text>