Common java Methods

Zejun. zhou zejun. zhou11 // List listValue = null; // for (int I = 0; I <10; I ++) {// listValue = new ArrayList (); // testEX test = new testEX (); // listValue. add (test. getIi () + "dd" + I); // map. put (test. getIi () + "dd" + I, listValue); //} // for (int I = 0; I <map. size (); I ++) {// List time = new ArrayList (); // List listKey = new ArrayList (); // List listValue1 = new ArrayList (); // Iterator It = map. keySet (). iterator (); // while (it. hasNext () {// String key = it. next (). toString (); // System. out. println (key); // time = (List) map. get (key); // output the context of the ArrayList // for (int k = 0; k <time. size (); k ++) {// System. out. println (map. get (key); // System. out. println (time. get (k); // http: // 172.16.2.123/zentao/user-login-l3plbnrhby82.16.html http://www.jb51.net/books/8602 1. htmlhttp: // www.linuxidc.com/Linux/2011-12/49516p2.htm A, json must package commons-collections-3.2.jar commons-lang-2.3.jar, commons-beanutils-1.7.0.jar, ezmorph-1.0.4.jar commons-logges import these packages try General with these a few can be the commons-beanutils.jar, commons-httpclient.jar, commons-lang.jar, ezmorph. jar, morph-1.0.1.jar map to json Json json = new Json (); // new an object json. setName ("local"); json. setSex ("style"); Json json1 = new Json (); Json1.setName (""); json1.setSex (""); Map list = new HashMap (); list. put ("json", json); list. put ("json1", json1); JSONObject json111 = JSONObject. fromObject (list); // convert to jsonobject JSONObject name1 = json111.getJSONObject ("json"); // obtain jsonobject String names = name1.getString ("name "); // convert the value String from jsonobject to jsonobject string str = "{'string': 'json', 'integer': 1, 'double': 2, 'boolean ': true} "; JSONObject jso NObject1 = (JSONObject) JSONSerializer. toJSON (str); // jsonobject and jsonarray use JSONObject jsonObject = new JSONObject (); // jsonobject and jsonarray use JSONObject jsonObject1 = new JSONObject (); jsonObject1.element ("name", "1"); JSONArray jsonArray = new JSONArray (); jsonArray. add ("1"); jsonObject1.element ("money", jsonArray); JSONObject jsonObject2 = new JSONObject (); jsonObject2.element ("name", "2 "); JSONArray jsonArray2 = new JSONArray (); jsonArray2.add ("2"); jsonObject2.element ("money", jsonArray2); jsonObject. element ("jsonObject1", jsonObject1); jsonObject. element ("jsonObject2", jsonObject2); JSONObject json1 = jsonObject; JSONObject json2 = json1.getJSONObject ("jsonObject1"); String name = json2.getString ("name "); string sex = json2.getString ("sex"); JSONArray jsonArray1 = json2.getJSONArray ("money" ); String money = (String) jsonArray1.get (0); 2. String. valueOf (int); // convert int to String indexOf () to include.> = 0 otherwise-1 3. Create xml soap. jar import org. apache. soap. util. xml. XMLParserUtils; import org. w3c. dom. document; import org. w3c. dom. element; import javax. xml. parsers. documentBuilder; DocumentBuilder xdb = XMLParserUtils. getXMLDocBuilder (); Document doc = xdb. newDocument (); Element El = doc. createElement ("avresult"); Element rcode = doc. createElement ("retcode"); Element message = doc. createElement ("msg"); rco De. appendChild (doc. createTextNode ("retcode"); message. appendChild (doc. createTextNode ("msg"); El. appendChild (rcode); El. appendChild (message); System. out. println (DOM2Writer. nodeToString (El )); <avresult> <retcode> code </retcode> <msg> csg </msg> </avresult> 4. dom4j-1.6.1.jar parses the xml method in the form of a string Document doc = DocumentHelper. parseText (avResultXml); // convert the string to XML List re = doc. selectNodes ("/avresult/retcode"); Ite Rator I = re. iterator (); while (I. hasNext () {Element ele = (Element) I. next (); String eles = ele. getText (); System. out. println (eles);} Method 2: Document doc = incluenthelper. parseText (avResultXml); // convert the string to XML Element root = doc. getRootElement (); // get the root node Iterator <?> Iter = root. elementIterator ("item"); // obtain the child node item while (iter. hasNext () {Element record = (Element) iter. next (); Iterator <?> Iters = record. elementIterator ("segment"); // obtain the child node segment while (iters. hasNext () {Element records = (Element) iters. next (); // exclude a transit flight String org = records. elementTextTrim ("org") ;}} method 3. Document doc = incluenthelper. parseText (abeXmlResult); root = doc. getRootElement (); // resultBean. setErrorDate (true); String from = root. attributeValue ("From"); 5. cache memcached-2.5.jar 6. dynamic transmission parameter System. out. pr Intln (String. format ("form" + "% s" + "to" + "% s", "fromCity", "toCity ")); form fromCityto toCity 7. Check today's day of the week SimpleDateFormat = new SimpleDateFormat ("yyyy-MM-dd"); // define the date Calendar c = Calendar. getInstance (); // The object created in singleton mode is better than new try {c. setTime (format. parse (""); // parse the time to Wed Jun 19 00:00:00 CST 2013 set the day of the week} catch (ParseException e) {logger.info ("the date to be converted is: "+ pTime); logger.info (" converts a date to the day of the week Error! "+ E. getMessage (); e. printStackTrace ();} int dayForWeek = 0; // defines the number of the day of the week minus 1 to the exact time if (c. get (Calendar. DAY_OF_WEEK) = 1) {dayForWeek = 7;} else {dayForWeek = c. get (Calendar. DAY_OF_WEEK)-1;} return String. valueOf (dayForWeek); // converts int to String} 8. baseCabins = baseCabinList. toArray (new Basecabin [0]); // The set is converted to an array bawcs = new BAirwayCw [listBAirwayCws. size ()]; 9. // get the difference between 12.00 and the current time SimpleDateForm At simple = new SimpleDateFormat ("yyyy-MM-dd HH: mm: ss"); // defines the input format String time = simple. format (new Date (); // the corresponding time 2013-06-19 // 14:58:03 System. out. println (time); Calendar currentDate = Calendar. getInstance (); // defines the time object currentDate. set (Calendar. HOUR_OF_DAY, 23); // hour currentDate. set (Calendar. MINUTE, 59); // MINUTE currentDate. set (Calendar. SECOND, 59); // SECOND // SimpleDateFormat simple1 = new SimpleDateFormat ("y Yyy-MM-dd // HH: mm: ss "); String endtime = simple. format (Date) currentDate. getTime (). clone (); System. out. println (endtime); // 2013-06-19 23:59:59 // SimpleDateFormat inputtime = new SimpleDateFormat ("yyyy-MM-dd // HH: mm: ss"); try {Date date = simple. parse (time); long times = date. getTime (); Date date1 = simple. parse (endtime); long times1 = date1.getTime (); long ss = (times1-times)/1000; // second System. out. println (Ss/60); // System. out. println (ss/3600); // hour System. out. println (ss);} catch (ParseException e) {// TODO Auto-generated catch block e. printStackTrace ();} 10. The current time is long st = System. currentTimeMillis (); 11. if (tax = null) {continue;} 12. Comparison time: SimpleDateFormat sdf = new SimpleDateFormat ("yyyy-MM-dd "); // format: Date date1 = sdf. parse ("2013-01-05"); // convert it to date Date date2 = sdf. parse (""); // convert Date if (date1.getTime ()-date2.getTime ()> 0) // convert it to long 13, effectively determine to exit if (fail = true) {return variable} connectingFlight: // an item of a transit flight represents a route. If there are multiple segments in the item, it indicates that the link will be continue connectingFlight. 14. Read the configuration parsing xml. <? Xml version = '1. 0' encoding = 'utf-8'?> <Items> <item name = 'beijing'> PEK, NAY </item> <item name = 'shanghai'> SHA, PVG </item> <item name = 'Xi 'AN '> XIY, SIA </item> </items> "; String file = Class name. class. getResource ("/multi-city.xml "). getFile (); Document config = incluenthelper. parseText (FileUtils. readFileToString (new File (file), "UTF-8"); List <Element> items = doc. selectNodes ("// items/item"); String cts; List <String> cityList; for (Element item: items) {cts = item. getText Trim (); cityList = Arrays. asList (cts. toUpperCase (). split (",") ;}}15. string to list set List list = Arrays. asList ("sd, f ". toUpperCase (). split (","). In linux, you cannot find the configuration file path. Sixteen, not equal to null, not equal to null StringUtils. isNotBlank (Stinng) 17. // set proxy ----- start ----- String strProxy = "172.16.1.35"; String strPort = "80"; Properties systemProperties = System. getProperties (); systemProperties. setProperty ("http. proxyHost ", strProxy); sys TemProperties. setProperty ("http. proxyPort ", strPort ); // set proxy ----- end ----- bean clone and copy // create two objects for replication. When the first object is copied to the second object, only the same BeanCopier copy = BeanCopier is copied. create (CompsInfo. class, QueryHkgsOutput. class, false); for (int I = 0; I