如何从jsp向Struts2动作输入Date？

Question

I am facing a lot of problems here in my jsp page. What tag I should use to get a date (yyyy-MM-dd) from user and store it in a Date property of a Struts2 action ?

The property in my action is declared to be of java.util.Date. I want the input from jsp page to land in this property.

please help.

I get Invalid field error (in JSP) if is use as:textfield tag to manyally enter a date in the right format.

Answer 1

I know this post is a bit old but a solution may be useful to others.

The default converter of Struts does not seem to work properly. The field error even occurs with readonly fields populated from the action.

I resolved it by defining my own converter:

1. Create the converter class (using the date format you need):

    public class StringToDateTimeConverter extends StrutsTypeConverter { // WARNING not safe in multi-threaded environments private static final DateFormat DATETIME_FORMAT = new SimpleDateFormat("dd-MMM-yyyy hh:mm:ss"); public Object convertFromString(Map context, String[] strings, Class toClass) { if (strings == null || strings.length == 0 || strings[0].trim().length() == 0) { return null; } try { return DATETIME_FORMAT.parse(strings[0]); } catch (ParseException e) { throw new TypeConversionException("Unable to convert given object to date: " + strings[0]); } } public String convertToString(Map context, Object date) { if (date != null && date instanceof Date) { return DATETIME_FORMAT.format(date); } else { return null; } } } 

2. Put the conversion annotation on the property setter (or use a conversion.properties file)

    @Conversion() public class MyEditAction { // ... @TypeConversion(converter="my.app.common.converter.StringToDateTimeConverter") public void setUploadedDate(Date uploadedDate) { this.uploadedDate = uploadedDate; } 

In my case I did not need to edit it but wanted to specify the format in the jsp. I used an additional hidden field to keep the original value (another alternative would have been the use of Preparable interface):

<s:textfield name="uploadedDateDisplay" value="%{getText('format.datetimesecond',{uploadedDate})}" size="70" disabled="true"/>
<s:hidden name="uploadedDate" />

Answer 2

This is how I solved this.

    <s:date name="nameOfInputVal" var="formattedVal"/>
    <s:textfield name="nameOfInputVal" value="%{#formattedVal}" key="labelkey" />

And in your message properties a key/value:

struts.date.format=dd/MM/yyyy

Which indicates the default format and you don't have to write it in each date tag.

Hope this helps

Answer 3

So maybe I don't understand the question. But I hope this example helps (btw this code will not work its just to help give you an idea of how it sturts2 works its magic); So for form input you need to have a holder class in java, so you can call your date from your action class such as Holder.java:

public class Holder{
  pirvate Date date; 
  public getDate(){
     return date; 
  }
  public setDate(Date date){
    this.date = date; 
  }
}

Your Holder.java validation so you can make sure its a date Holder-validation.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE validators PUBLIC "-//OpenSymphony Group//XWork Validator 
1.0.2//EN" "http://www.opensymphony.com/xwork/xwork-validator-1.0.2.dtd">
<validators>
    <field name="date">
    <field-validator type="date">
               <message><![CDATA[ Must be a date ]]></message>
    </field-validator>
     </field>
</validators>

Your action class where you call your make sure holder.getdate to get your date getDateAction.java:

private Holder holder;
    public class getDateAction{
    public String execute(){
     //get your date
      Date date = holder.getDate(); 

       return SUCCESS; 
     }
    }

Your jsp form where you give the client the ability to input the date. Make sure for input name="holder.date". Here is site.jsp:

<s:form id="Form" name="MyForm" action="getDateAction" method="post"  class="form">
<input type="text" name="holder.date" id="date" size="25" value="" class="required text">
</s:form>

and last but not least your struts.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
<package name="example" extends="struts-default">
<action name="getdate" class="com.location.action.getDateAction">
         <result>example.jsp</result>
</action>
</package>
</struts>

---

There is an explanation of Struts2 date Format here at: Struts 2 Date Format Examples

But I believe the tag you are looking for in jsp is

<s:date name="Date_Name" format="yyyy-MM-dd" />

Where Date_Name is the Date object in Java.

Answer 4

jsp:

<s:textfield name="date" id="date" key="invitation.date" required="true" value="%{getText('format.date',{date})}" size="8"/>

?.properties

format.date={0,date,dd/MM/yyyy}

Action.java

import java.util.Date;
private Date date;
public void setDate(Date date) {
    this.date = date;
}

script: You can add jquery.datepicker (I don't recommend struts datepicker): http://jqueryui.com/datepicker/

$("#date").datepicker({dateFormat: dateFormat});

Answer 5

private Date date;

public void setDate(String date) {
//setter method param type is String
    try {
        this.date=new SimpleDateFormat("yyyy-MM-dd").parse(date);
    } catch (ParseException e) {
        e.printStackTrace();
    }
}


<form action="target.do">
    <input name="date" value="2015-5-28">
    <button type="submit">submit</button>
</form>

Answer 6

There is one solution which i tried and it worked :)
1)Keep the column in which you want to store date in database's table in "DATE" data type only. 2)Use only Textfield tag in JSP page.Dont use Date tag.
Note :Make sure that you make user input date in YYYY-MM-DD format only by placing a placeholder in textfield tag !
3)Keep the variable for accessing that field of string type only.Dont use DATE data type.
4)Now run Query: Select DATE_FORMAT(datecolumnname,'%d/%m%/Y') as date_two from tablename; and you will get date from that columnin dd/mm/yyyy format even if it is stored in YYYY-MM-DD format in table .
5)And you can also compare your datecolumn's data with curdate() and related functions as well and it works :) .
6)Like i used query: Select id,name,DATE_FORMAT(datecolumnname,'%d/%m/%Y') as datecolumn2 from tablename where datecolumnname >= curdate();

Answer 7

the <s:date /> tag only displays dates - it doesn't provide input.

I don't believe Struts provides out of the box date input, unless you use the date time picker, which is an dojo / javascript tag. More info on that is here: http://struts.apache.org/2.0.14/docs/datetimepicker.html

If you don't go down that route, you will most likely need to map the date on your JSP to a string, then format it in your action class. You can make this easier by getting Struts to validate the value first.