Dom4j parses XML instances

Dom4j is a Java xml api, similar to JDOM, used to read and write XML files. It features excellent performance, powerful functionality, and ease of use.

Jar package: dom4j-1.6.1.jar

XML file to be parsed: people. xml

 

XML Code

1. <People city = "Shenzhen">
2. <Student name = "Milton" age = "22"> </student>
3. <Student name = "lego" age = "23"> </student>
4. <Teacher name = "Bruce" age = "27"> </teacher>
5. <Teacher name = "Ziven" age = "28"> </teacher>
6. </People>

First, build a JavaBean according to the XML document.

People. Java

Student. Java

Teacher. Java

Parsing Code:

 

Java code

1. Package com. Test. xml;
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;
9. Import org. dom4j. Document;
10. Import org. dom4j. extends entexception;
11. Import org. dom4j. element;
12. Import org. dom4j. Io. saxreader;
14. Import com. Test. xml. element. People;
15. Import com. Test. xml. element. student;
16. Import com. Test. xml. element. teacher;
18. Public class xmlparser {
19. @ Suppresswarnings ("unchecked ")
20. Public static people parsexml (string xmlpath ){
21. File xmlfile = new file (xmlpath );
22. System. Out. println (xmlfile. getpath ());
23. If (xmlfile. exists ()){
24. Saxreader reader = new saxreader ();
25. People = new people ();
26. Try {
27. // Read the document stream
28. Document document = reader. Read (xmlfile );
29. // Obtain the root node
30. Element root = Document. getrootelement ();
32. List <student> students = new arraylist <student> ();
33. List <teacher> teachers = new arraylist <teacher> ();
34. People. setcity (root. attributevalue ("city "));
35. // Parse the student Node
36. For (iterator = root. elementiterator ("student"); iterator. hasnext ();){
37. Element estudent = (element) iterator. Next ();
38. Student = new student (estudent. attributevalue ("name"), integer. parseint (estudent. attributevalue ("Age ")));
39. Students. Add (student );
40. }
41. // Parse the teacher Node
42. For (iterator = root. elementiterator ("teacher"); iterator. hasnext ();){
43. Element eteacher = (element) iterator. Next ();
44. Teacher = new teacher (eteacher. attributevalue ("name"), integer. parseint (eteacher. attributevalue ("Age ")));
45. Teachers. Add (teacher );
46. }
47. People. setstudent (students );
48. People. setteacher (teachers );
49. System. Out. println ("parse success! ");
50. } Catch (incluentexception e ){
51. E. printstacktrace ();
52. }
53. Return people;
54. } Else {
55. System. Out. println ("file is not exist! ");
56. Return NULL;
57. }
58. }
60. Public static void main (string [] ARGs) throws urisyntaxexception {
61. String xmlpath = "";
62. Xmlpath = "D:/program files/eclipse-jee/workspace/test/src/COM/test/XML/people. xml ";
63. System. Out. println ("file full path is" + xmlpath );
64. // Parse people. xml
65. People P = parsexml (xmlpath );
67. // Process resolution results
68. System. Out. println (P. getcity ());
69. List <student> slist = P. getstudent ();
70. List <teacher> tlist = P. getteacher ();
71. For (student s: slist ){
72. System. Out. println (S. getname () + "--" + S. getage ());
73. }
74. For (teacher T: tlist ){
75. System. Out. println ();
76. }
77. }
78. }

Java code

1. Running result:

Java code

1. Parse success!
2. Shenzhen
3. Milton -- 22
4. Lego -- 23