Java parses XML files using Sax

The following code can be run directly, hoping to save time for beginners who want to use SAX to parse XML files

Java code

1. PackageParsexml;
3. ImportOrg. Apache. xerces. parsers. saxparser;
4. ImportOrg. xml. Sax. attributes;
5. ImportOrg. xml. Sax. helpers. defaulthandler;
7. // Directly parse the first method
8. Public ClassSaxdemoExtendsDefaulthandler {
10. Public Static VoidMain (string [] ARGs ){
11. Try{
13. Saxparser parser =
14. (Saxparser) class. forname ("org. Apache. xerces. parsers. saxparser"). newinstance ();
15. Saxdemo handler =NewSaxdemo ();
16. Parser. setcontenthandler (handler );
17. Parser. parse ("parsexml/test. xml ");
20. }Catch(Exception e ){
21. System. Out. println (E. tostring ());
22. }
23. }
25. Public VoidStartelement (string Uri, string localname, string QNAME, attributes ATTR ){
26. System. Out. println ("start uri of element:" + URI + "| localname:" + localname + "| QNAME:" + QNAME );
27. If(ATTR. getlength ()> 0 ){
28. For(IntI = 0; I <ATTR. getlength (); I ++ ){
29. System. Out. println (ATTR. getqname (I) + "=" + ATTR. getvalue (I ));
30. }
31. }
32. }
34. Public VoidEndelement (string Uri, string localname, string QNAME ){
35. System. Out. println ("End URI of element:" + URI + "localname:" + localname + "QNAME:" + QNAME );
36. System. out. println ("========================================== =================================== ");
37. }
39. }

Package parsexml; import Org. apache. xerces. parsers. saxparser; import Org. XML. sax. attributes; import Org. XML. sax. helpers. defaulthandler; // The first method directly parses public class saxdemo extends defaulthandler {public static void main (string [] ARGs) {try {saxparser parser = (saxparser) class. forname ("org. apache. xerces. parsers. saxparser "). newinstance (); saxdemo handler = new saxdemo (); parser. setcontenthandler (handler); parser. parse ("parsexml/test. XML ");} catch (exception e) {system. out. println (E. tostring () ;}} public void startelement (string Uri, string localname, string QNAME, attributes ATTR) {system. out. println ("element start URI:" + URI + "| localname:" + localname + "| QNAME:" + QNAME); If (ATTR. getlength ()> 0) {for (INT I = 0; I <ATTR. getlength (); I ++) {system. out. println (ATTR. getqname (I) + "=" + ATTR. getvalue (I) ;}} public void endelement (string Uri, string localname, string QNAME) {system. out. println ("End URI of element:" + URI + "localname:" + localname + "QNAME:" + QNAME); system. out. println ("========================================== ==================================== ");}}

Java code

1. PackageParsexml;
3. ImportOrg. Apache. xerces. parsers. saxparser;
4. ImportOrg. xml. Sax. attributes;
5. ImportOrg. xml. Sax. saxexception;
6. ImportOrg. xml. Sax. helpers. attributesimpl;
7. ImportOrg. xml. Sax. helpers. defaulthandler;
8. ImportOrg. xml. Sax. helpers. xmlfilterimpl;
10. // Method 2: Use filter to parse
11. Public ClassSaxdemo2ExtendsDefaulthandler {
13. Public Static VoidMain (string [] ARGs ){
14. Try{
15. // Generate saxparser
16. Saxparser parser =
17. (Saxparser) class. forname ("org. Apache. xerces. parsers. saxparser"). newinstance ();
18. // Generate Handler
19. Saxdemo2 handler =NewSaxdemo2 ();
21. Filterhandler filter =NewFilterhandler ();
23. // Configure the handler and parser just generated into the filter
24. Filter. setparent (parser );
25. Filter. setcontenthandler (handler );
27. Filter. parse ("parsexml/test. xml ");
28. }Catch(Exception e ){
29. System. Out. println (E. tostring ());
30. }
31. }
33. Public VoidStartelement (string Uri, string localname, string QNAME, attributes ATTR ){
34. System. Out. println ("start uri of element:" + URI + "| localname:" + localname + "| QNAME:" + QNAME );
35. If(ATTR. getlength ()> 0 ){
36. For(IntI = 0; I <ATTR. getlength (); I ++ ){
37. System. Out. println (ATTR. getqname (I) + "=" + ATTR. getvalue (I ));
38. }
39. }
40. }
42. Public VoidEndelement (string Uri, string localname, string QNAME ){
43. System. Out. println ("End URI of element:" + URI + "localname:" + localname + "QNAME:" + QNAME );
44. System. out. println ("========================================== =================================== ");
45. }
47. Static ClassFilterhandlerExtendsXmlfilterimpl {
48. IntIndex = 0;
50. Public VoidStartelement (string Uri, string localname, string QNAME, attributes ATTR)ThrowsSaxexception {
51. Attributesimpl attrimpl =NewAttributesimpl (ATTR );
52. For(IntI = 0; I <attrimpl. getlength (); I ++ ){
53. If(Attrimpl. getqname (I). touppercase (). Equals ("ID ")){
54. Attrimpl. removeattribute (I );
55. Break;
56. }
57. }
58. Attrimpl. addattriof ("", "ID", String. valueof (index ++ ));
59. Super. Startelement (Uri, localname, QNAME, attrimpl );
60. }
62. Public VoidEndelement (string Uri, string localname, string QNAME)ThrowsSaxexception {
63. Super. Endelement (Uri, localname, QNAME );
64. }
66. Public VoidCharacters (Char[] CH,IntIstart,IntIlength)ThrowsSaxexception {
67. Super. Characters (CH, istart, ilength );
68. }
69. }
70. }