Introduction to XML operations in Java

Today, we have sorted out the java beans used to operate XML files in previous projects. A complete XML instance is compiled. In the whole instance, I used different XML operation methods for creating, parsing, and operating XML files. Import file: Import Java. io. *; import Java. util. *; import Org. w3C. dom. *; import javax. XML. parsers. *; import Org. JDOM. *; import Org. JDOM. output. *; import COM. newland. nlie. highway. pub_com.msgmgr.msg_bean; import javax. XML. transform. *; import javax. XML. transform. dom. domsource; import javax. XML. transform. stream. streamresult; create the XML file public Boolean create_xmlfile () {Org. JDOM. element root = new Org. JDOM. element ("msg_not I _info "); Org. JDOM. document Doc = new Org. JDOM. document (Root); // Add the child element: Org. JDOM. element name1 = new Org. JDOM. element ("dep_code"); name1.addattribute (New Org. JDOM. attribute ("value", "2222"); root. addcontent (name1); Org. JDOM. element name = new Org. JDOM. element ("noti_man"); Name. addattribute (New Org. JDOM. attribute ("user_code", "2222"); Org. JDOM. element plan_noti_time = new Org. JDOM. element ("plan_noti_time "); Plan_noti_time.addattribute (New Org. JDOM. attribute ("value", "10:10:10"); Org. JDOM. element msg_num = new Org. JDOM. element ("msg_num"); msg_num.addcontent ("message serial number"); plan_noti_time.addcontent (msg_num); Org. JDOM. element noti_way = new Org. JDOM. element ("noti_way"); noti_way.addcontent ("notification method"); plan_noti_time.addcontent (noti_way); Org. JDOM. element msg_date = new Org. JDOM. element ("msg_date"); msg_da Te. addcontent ("message date"); plan_noti_time.addcontent (msg_date); Org. JDOM. element msg_time = new Org. JDOM. element ("msg_time"); msg_time.addcontent ("message time"); plan_noti_time.addcontent (msg_time); Org. JDOM. element send_dep = new Org. JDOM. element ("send_dep"); send_dep.addcontent ("sending Department"); plan_noti_time.addcontent (send_dep); Org. JDOM. element send_man = new Org. JDOM. element ("send_man"); send_man.addcontent ("sender "); Plan_noti_time.addcontent (send_man); Org. JDOM. element msg_title = new Org. JDOM. element ("msg_title"); msg_title.addcontent ("Message Title"); plan_noti_time.addcontent (msg_title); Org. JDOM. element msg_cont = new Org. JDOM. element ("msg_cont"); msg_cont.addcontent ("message content"); plan_noti_time.addcontent (msg_cont); Org. JDOM. element attach = new Org. JDOM. element ("Attach"); attach. addcontent ("attachments"); plan_noti_time.addconten T (attach); Org. JDOM. element msg_type = new Org. JDOM. element ("msg_type"); msg_type.addcontent ("Message Type"); plan_noti_time.addcontent (msg_type); Org. JDOM. element noti_status = new Org. JDOM. element ("noti_status"); noti_status.addcontent ("Notification status"); plan_noti_time.addcontent (noti_status); Org. JDOM. element noti_pri = new Org. JDOM. element ("noti_pri"); noti_pri.addcontent ("notification priority"); plan_noti_time.addcontent (noti_pri); Name. addcontent (plan_noti_time); name1.addcontent (name); // use fileoutputstream to generate the XML text try {string ident = ""; Boolean isnew = true; string cset = "gb2312 "; xmloutputter outer = new xmloutputter ("", true, cset); outer. output (Doc, new fileoutputstream ("user_msg.xml"); Return true;} catch (ioexception e) {e. printstacktrace (); Return false ;}} generated XML file content: <? XML version = "1.0" encoding = "UTF-8"?> <Msg_noti_info> <dep_code value = "2222"> <noti_man user_code = "2222"> <plan_noti_time value = "10:10:10"> <msg_num> 2 </msg_num> <noti_way> notification method </noti_way> <msg_date> message date </msg_date> <msg_time> message time </msg_time> <send_dep> sender </send_dep> <send_man> </send_man> <msg_title> Message Title </msg_title> <msg_cont> message content </msg_cont> <attach> attachments </Attach> <msg_type> Message Type </msg_type> <noti_status> notification Status </noti_status> <noti_pri> notification priority </noti_pri> </plan_noti_time> </noti_man> </dep_code> </msg_noti_info>: public vector search_xml (string dep_code, string user_code) {vector searchvector = new vector (); msg_bean search_bean = new msg_bean (); try {file F = new file ("user_msg.xml "); documentbuilderfactory factory = documentbuilderfactory. newinstance (); documentbuilder builder = factory. newdocumentbuilder (); Org. w3C. dom. document Doc = builder. parse (f); integer int_temp; Org. w3C. dom. element root = Doc. getdocumentelement (); nodelist NL = root. getelementsbytagname ("dep_code"); For (INT I = 0; I <NL. getlength (); I ++) {If (dep_code.equals (root. getelementsbytagname ("dep_code "). item (I ). getattributes (). getnameditem ("value "). getnodevalue () = true) {Org. w3C. dom. element noti_man = (Org. w3C. dom. element) nL. item (I); nodelist nl1 = noti_man.getelementsbytagname ("noti_man"); For (Int J = 0; j <nl1.getlength (); j ++) {If (user_code.equals (noti_man.getelementsbytagname ("noti_man "). item (j ). getattributes (). getnameditem ("user_code "). getnodevalue () = true) {Org. w3C. dom. element plan_time = (Org. w3C. dom. element) nl1.item (j); nodelist nl2 = plan_time.getelementsbytagname ("plan_noti_time"); For (INT n = 0; n <nl2.getlength (); N ++) {If (plan_time.getelementsbytagname ("plan_noti_time "). item (n ). getattributes (). getnameditem ("value "). getnodevalue (). equals ("10:10:10") {Org. w3C. dom. element searchelement = (Org. w3C. dom. element) nl2.item (n); int_temp = integer. valueof (searchelement. getelementsbytagname ("msg_num "). item (n ). getfirstchild (). getnodevalue (); search_bean.setmsg_num (int_temp.intvalue (); search_bean.setnoti_way (searchelement. getelementsbytagname ("noti_way "). item (n ). getfirstchild (). getnodevalue (); search_bean.setmsg_date (searchelement. getelementsbytagname ("msg_date "). item (n ). getfirstchild (). getnodevalue (); search_bean.setmsg_time (searchelement. getelementsbytagname ("msg_time "). item (n ). getfirstchild (). getnodevalue (); search_bean.setsend_dep (searchelement. getelementsbytagname ("send_dep "). item (n ). getfirstchild (). getnodevalue (); search_bean.setsend_man (searchelement. getelementsbytagname ("send_man "). item (n ). getfirstchild (). getnodevalue (); search_bean.setmsg_title (searchelement. getelementsbytagname ("msg_title "). item (n ). getfirstchild (). getnodevalue (); search_bean.setmsg_cont (searchelement. getelementsbytagname ("msg_cont "). item (n ). getfirstchild (). getnodevalue (); search_bean.setattach (searchelement. getelementsbytagname ("Attach "). item (n ). getfirstchild (). getnodevalue (); search_bean.setmsg_type (searchelement. getelementsbytagname ("msg_type "). item (n ). getfirstchild (). getnodevalue (); search_bean.setnoti_status (searchelement. getelementsbytagname ("noti_status "). item (n ). getfirstchild (). getnodevalue (); search_bean.setnoti_pri (searchelement. getelementsbytagname ("noti_pri "). item (n ). getfirstchild (). getnodevalue (); searchvector. add (search_bean); plan_time.removechild (plan_time.getelementsbytagname ("plan_noti_time "). item (n )); // Delete the searched content }}}}}}////////******************* **************************************** ///////// Delete the key value and re-write the file transformerfactory tfactory = transformerfactory. newinstance (); transformer = tfactory. newtransformer (); domsource source = new domsource (DOC); streamresult result = new streamresult (New Java. io. file ("user_msg.xml"); transformer. transform (source, result ); //////////////////////////////////////// /// // return searchvector ;} catch (exception e) {e. printstacktrace (); return NULL ;}}