Java Web Utility Tip 02

Date Time conversion to page display

    两种方式：    1. OutputStream out = response.getOutputStream(); map.put("enterFromTime", sdf.format(itemData.getEnterFromTime()));// 入单时间    2. map.put("changeTime", DateUtil.formatDate(itemData.getChangeTime()));// 转单时间    第2种好。

date plus Day

Advanced search will use the end date to add one day to get the matching search results

    //date plus one day:    //End time    if(Searchjson.Has ("EndTime")){StringEndTime=(String) Searchjson.Get"EndTime");if(!EndTime.equals("")){Date Date =Dateutil.GetDateFormat ().Parse (endTime); Calendar Cal=Calendar.GetInstance (); Aa..SetTime (Date); Aa..Add (Calendar.DATE,1);Date =Aa..GetTime (); Itemsearchwrap.Setendtime (Date); }    }

examples of String,integer to BigDecimal in Java

Example 1,string turn BigDecimal

publicclass Test{     publicstaticvoidmain(String[] arg) {         String str1="2.30";        BigDecimal bd=new BigDecimal(str1);        System.out.println(bd);    } }

Direct new is on the line.

Example 2,bigdecimal and String conversions

/* Method of constructing BigDecimal by numeric String * method of setting BigDecimal number of decimal digits */ ImportJava.Math.BigDecimal;//numeric stringStringStrbd="1048576.1024";//Construct variable BD of type BigDecimal with string content as valueBigDecimal BD=NewBigDecimal (STRBD);//Set the number of decimal digits, the first variable is the number of decimal digits, the second is the trade-off method (rounding)Bd=Bd.Setscale (2, BigDecimal.ROUND_HALF_UP);//Convert to string outputStringOutstring=Bd.ToString ();

Add: Integer Turn BigDecimal

BigDecimal(Integer.parseInt(findCcid.toString()))

type conversion string,list,int in Java

1.String->list

String[] arr = tpAssignMarkStr.split(",");        List<StringArrays.asList(arr);

2.list->string

list<String> marklist = Tpassignmarkfielddao.gettpassigndeptmarkfield (NULL, Paperid);StringMarkstr = Stringutils.join (Marklist,",");//Take into account the storage of multiple flags        String[] markstring = Markstr.split (",");        list<tpsampledatabean> dataList = Tssampletemplatebean.gettpsampledatabeans (); list<String> sampledataids=Newarraylist<String> ();//Data list for storing samples         for(Tpsampledatabean d:datalist) { for(Stringstr:markstring) {if(Str.equals (D.getfieldchar1 ())) {//FIELDCHAR1 is a sign                    if(Stringutils.equals (D.getpaperid (), Paperid) && stringutils.equals (D.getcomplianceid (),                    Complianceid)) {Sampledataids.add (D.getid ()); }                }            }        }

1.int->string

int i=12345;String s="";第一种方法：s=i+"";第二种方法：s=String.valueOf(i);第三种方法：StringInteger.toString(i);

2.string->int

s="12345";int i;第一种方法：i=Integer.parseInt(s);第二种方法：i=Integer.valueOf(s).intValue();

PS1:

The first method: s=i+ ""; Produces two String objects the second method: S=string.valueof (i);
Use static methods of the string class directly, producing only one object
The first method: I=integer.parseint (s);//Use static methods directly, do not produce extra objects, but throw exceptions
The second method: I=integer.valueof (s). Intvalue ();//integer.valueof (s) is the equivalent of new
Integer (Integer.parseint (s)), also throws an exception, but produces more than one object

PS2:

Double, Float, and Long turn into strings in a similar way.

Java Web Utility Tip 02