How to convert “2012-03-04 00:00:00.0” to Date with Format “dd-mm-yyyy HH:mm:ss” Using Java

Question

I have a date format that I am getting from the database and is a String type. It has a value stored that is like "2012-03-04 00:00:00.0" but I have declared a SimpleDateFormat as "dd-MMM-yyyy HH:mm:ss" which is needed in my project. Now whenever I am retrieving some data alsong with date from database I get a parse Exception with the log as below.

java.text.ParseException: Unparseable date: "2012-03-04 00:00:00.0" at java.text.DateFormat.parse(Unknown Source) at com.tcs.tool.iris.aep.selfProfile.dao.AepSelfProfileDaoImpl$1.setValues(AepSelfProfileDaoImpl.java:1188) at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:892) at org.springframework.jdbc.core.JdbcTemplate$4.doInPreparedStatement(JdbcTemplate.java:1) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:586) at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:614) at org.springframework.jdbc.core.JdbcTemplate.batchUpdate(JdbcTemplate.java:883) at com.tcs.tool.iris.aep.selfProfile.dao.AepSelfProfileDaoImpl.insertDataIntoActionItems(AepSelfProfileDaoImpl.java:1174) at com.tcs.tool.iris.aep.selfProfile.service.AepSelfProfileServiceImpl.insertDataIntoActionItems(AepSelfProfileServiceImpl.java:214) at com.tcs.tool.iris.aep.selfProfile.controller.UpdateProgressController.onSubmit(UpdateProgressControll er.java:48) at org.springframework.web.servlet.mvc.SimpleFormController.processFormSubmission(SimpleFormController.java:272) at org.springframework.web.servlet.mvc.AbstractFormController.handleInvalidSubmit(AbstractFormController.java:675) at org.springframework.web.servlet.mvc.AbstractFormController.handleRequestInternal(AbstractFormController.java:275) at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:153) at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:48) at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790) at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719) at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644) at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560) at javax.servlet.http.HttpServlet.service(HttpServlet.java:637 ) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoi nt.java:489) at java.lang.Thread.run(Unknown Source)

Please help me to figure out whats wrong with this. And how to convert it into the correct format.

The code snippet where I get the exception is as follows:-

SimpleDateFormat sdf = new SimpleDateFormat(
                                "dd-MMM-yyyy HH:mm:ss");
                        Calendar currenttime = Calendar.getInstance();
                        java.util.Date currentdate = currenttime.getTime();
                        String currentDateInsert = sdf.format(currentdate);
                        CommentNActionItem commentAndAction = commentActionItem
                                .get(i);
                        java.util.Date datefromDb = null;
                        try {
                            @SuppressWarnings("unused")
                            Date dateF=sdf.parse(commentAndAction.getCreatedDate());
                            datefromDb = (java.sql.Date)sdf.parseObject(commentAndAction.getCreatedDate());
                        } catch (Exception e1) {
                            // TODO Auto-generated catch block
                            e1.printStackTrace();

}

Answer 1

The process of converting date strings is rather straightforward. You define the input format, use it to parse the original string, then define the output format, and use that to convert it back to a string.

I have the impression that you are trying to shortcut this, by reusing the same format for parsing and output? Use two formats , then!

// Convert input string into a date
DateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");
Date date = inputFormat.parse(inputString);

// Format date into output format
DateFormat outputFormat = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
String outputString = outputFormat.format(date);

Answer 2

The year is at first place and you need to parse the millisecond part. I've extended the answer to show a simple dateformat conversion:

    SimpleDateFormat in = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
    SimpleDateFormat out = new SimpleDateFormat("dd-MM-yy HH:mm:ss");

    Date date = in.parse("2012-03-04 11:09:00.123");
    String result = out.format(date);
    System.out.println(result);

Answer 3

tl;dr

LocalDateTime.parse( 
    "2012-03-04 00:00:00.0".replace( " " , "T" ) 
).format(
    DateTimeFormatter.ofPattern( "uuuu-MM-dd HH:mm:ss" )
)

java.time

The other Answers use the troublesome old date-time classes that are now legacy, supplanted entirely by the modern java.time classes. For earlier Android, see the last bullets below.

Parse as a LocalDateTime object as your input lacks any indication of time zone or offset-from-UTC.

String input = "2012-03-04 00:00:00.0".replace( " " , "T" ) ; 

LocalDateTime ldt = LocalDateTime.parse( input ) ;

If you really do not care about the fractional second, chop it off.

LocalDateTime ldtTruncated = ldt.truncatedTo( ChronoUnit.SECONDS ) ;

Specify your custom format for use in generating a String to represent this value.

DateTimeFormatter f = DateTimeFormatter.ofPattern( "uuuu-MM-dd HH:mm:ss" ) ;
String output = ldtTruncated.format( f ) ;

Dump to console.

System.out.println( "input: " + input ) ;
System.out.println( "ldt: " + ldt ) ;
System.out.println( "ldtTruncated: " + ldtTruncated ) ;
System.out.println( "output: " + output ) ;

See this code run live at IdeOne.com .

input: 2012-03-04T00:00:00.0

ldt: 2012-03-04T00:00

ldtTruncated: 2012-03-04T00:00

output: 2012-03-04 00:00:00

---

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date , Calendar , & SimpleDateFormat .

The Joda-Time project, now in maintenance mode , advises migration to the java.time classes.

To learn more, see the Oracle Tutorial . And search Stack Overflow for many examples and explanations. Specification is JSR 310 .

Where to obtain the java.time classes?

• Java SE 8 , Java SE 9 , and later
  • Built-in.
  • Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and Java SE 7
  • Much of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport .
• Android
  • The ThreeTenABP project adapts ThreeTen-Backport (mentioned above) for Android specifically.
  • See How to use ThreeTenABP… .

Answer 4

You can use this class:

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.text.ParseException;
/**
 * Helper class for handling ISO 8601 strings of the following format:
 * "2008-03-01T13:00:00+01:00". It also supports parsing the "Z" timezone.
 */
public final class ISO8601 {
    /** Transform Calendar to ISO 8601 string. */
    public static String fromCalendar(final Calendar calendar) {
        Date date = calendar.getTime();
        String formatted = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ").format(date);
        return formatted.substring(0, 22) + ":" + formatted.substring(22);
    }

    /** Get current date and time formatted as ISO 8601 string. */
    public static String now() {
        return fromCalendar(GregorianCalendar.getInstance());
    }

    /** Transform ISO 8601 string to Calendar. */
    public static GregorianCalendar toCalendar(final String iso8601string) throws ParseException {
        GregorianCalendar calendar = (GregorianCalendar) GregorianCalendar.getInstance();
        String s = iso8601string;
        Date date = null;
        try{
            s=s.replace("Z", "+00:00");
            try {
                s = s.substring(0, 26) + s.substring(27);
            } catch (IndexOutOfBoundsException e) {}
            date = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZ").parse(s);
        }catch(Exception tc)
        {
            s=s.replace("Z", "+00:00");
            try {
                s = s.substring(0, 22) + s.substring(23);
            } catch (IndexOutOfBoundsException e) {}
            date = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ").parse(s);
        }
        calendar.setTime(date);
        return calendar;
    }
}

Answer 5

Date format with week day name in Java Android

Input: 2017-08-02T12:54:54+04:00 
you are required to show results like:
Output:    Wednesday
           August 2, 2017 12:54 pm



 public static String getDateFormat(String date){
      String input_date= date;
     //incase you are getting format 2017-08-02T12:54:54+04:00 you need to
    // replace T with " " doing so String input_date = date.replace("T","");
      SimpleDateFormat format1=new SimpleDateFormat("yyyy-MM-dd HH:mm");
      Date dt1= null;
      try {
        dt1 = format1.parse(input_date);
      } catch (ParseException e) {
        e.printStackTrace();
      }

      DateFormat format2=new SimpleDateFormat("EEEE");
      String finalDay=format2.format(dt1);
      String stringDate = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.SHORT).format(dt1); // for seconds removal use DateFormat.SHORT in second parameter  
      return finalDay+"\n"+stringDate;
      }

Answer 6

尝试使用正确的格式（订单，M表示月份）并添加模式毫秒：

new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.S");

Answer 7

check this code.. You can convert string format into Date format using SimpleDateFormat

public static final String DATE_TIME_FORMAT = "yyyy-MM-dd hh:mm aa ";
SimpleDateFormat dateTimeFormat = new SimpleDateFormat(DATE_TIME_FORMAT);
Date date = null;
try {

      String date_time_string="2012-03-01 21:15 am";

                date = dateTimeFormat.parse(date_time_string);
            } catch (java.text.ParseException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

Answer 8

I think this is the code you are looking for:

    String dateString = "2012-03-04 00:00:00.0";
    DateFormat inputFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss.S");
    DateFormat outputFormat = new SimpleDateFormat("dd-MMM-yyyy HH:mm:ss");
    Date date = inputFormat.parse(dateString);
    System.out.println(outputFormat.format(date));