Thanks Richard, I wasn't aware of this.
mc
On 28 Oct 2005 at 6:48, Richard Yee wrote:
> You should be aware that when using a java.text.DateFormat class or its
> subclass as a static variable in a bean that can be accessed via
> multiple threads simultaneously, you need to synchronize access to it
> because DateFormat is not thread-safe. So you should change the code
> below to:
>
> public static synchronized String date2String(Date date) {
> return sdf.format(date);
> }
>
> or
>
> public static String date2String(Date date) {
> synchronized (date) {
> return sdf.format(date);
> }
> }
>
>
>
> This is from the DateFormat Javadoc:Synchronization
>
> Date formats are not synchronized. It is recommended to create separate
> format instances for each thread. If multiple threads access a format
> concurrently, it must be synchronized externally.
>
> Regards,
>
> Richard
>
> Murray Collingwood wrote:
> > Hi
> >
> > I add additional getters and setters for handling dates and prices (and
> > other special
> > numeric formats). For example, in addition to the normal getter I code an
> > additional
> > one to retrieve the date as a string.
> >
> > public Date getDateStart() {
> > return dateStart;
> > }
> > public String getDateStartAsString() {
> > if (dateStart == null) return "";
> > return Focus.date2String(dateStart);
> > }
> >
> >
> > I then code up some static methods to format dates to strings and similar
> > methods
to
> > make the opposite translation (string back to date). For example, a method
> > from
my
> > Focus class related to the above code:
> >
> > public static String date2String(Date date) {
> > return sdf.format(date);
> > }
> >
> > And if you're desparate, here is the sdf definition:
> >
> > private static SimpleDateFormat sdf = new
> > SimpleDateFormat("dd/MM/yyyy");
> >
> > You can do the same thing with a Timestamp, depends how many fields you
> > want
to
> > declare on your form and how much data entry you want your user to do. I
> > used a
> > similar method in my Focus class to get/set the date portion of the
> > timestamp value:
> >
> > public static String timestamp2String(Timestamp ts) {
> > if (ts == null) return "";
> > return date2String(new Date(ts.getTime()));
> > }
> >
> > HTH
> > mc
> >
> >
> > On 28 Oct 2005 at 14:31, Yujun Liang wrote:
> >
> >
> >> Hello,
> >>
> >> I am working on a project using Struts. Struts uses BeanUtil to populate
> >> Action
Form
> >>
> > Bean. This is such a nice framework to work with, except,
> >
> >> BeanUtil doesn't support java.util.Date conversion. But when I use
> >>
> > java.sql.Timestamp, it asks for the format of
> >
> >> yyyy-mm-dd hh:mm:ss.fffffffff
> >>
> >> Here is the exception when I enter other format,
> >>
> >> Caused by: java.lang.IllegalArgumentException: Timestamp format must
> >> be
yyyy-
> >>
> > mm-dd hh:mm:ss.fffffffff
> >
> >> In a web application, it is not reasonable to ask user to input yyyy-mm-dd
> >>
> > hh:mm:ss.fffffffff.
> >
> >> Also, it doesn't support Locale.
> >>
> >> Do you have experience getting java.util.Date populated in a Java Bean
> >> inside a
> >>
> > FormBean?
> >
> >> Thanks in advance.
> >>
> >> Regards
> >> Yujun Liang
> >> [EMAIL PROTECTED]
> >> (0408) 467 448
> >>
> >> 1. Form Bean Definition,
> >> <form-bean name="myForm"
type="org.apache.struts.validator.DynaValidatorForm">
> >>
> >> <form-property name="mybean"
type="com.mycompany.myproject.bean.MyBean"/>
> >>
> >> </form-bean>
> >>
> >> 2. Java Bean,
> >>
> >> package com.mycompany.myproject.bean;
> >>
> >> import java.io.Serializable;
> >>
> >> import java.sql.Timestamp;
> >>
> >> import org.apache.commons.lang.builder.EqualsBuilder;
> >>
> >> import org.apache.commons.lang.builder.HashCodeBuilder;
> >>
> >> import org.apache.commons.lang.builder.ToStringBuilder;
> >>
> >> public abstract class MyBean implements Serializable {
> >>
> >> private long interchangeId;
> >>
> >> private Timestamp creationTime;
> >>
> >> private String originatingChannel;
> >>
> >> public long getInterchangeId() {
> >>
> >> return this.interchangeId;
> >>
> >> }
> >>
> >> public void setInterchangeId(long interchangeId) {
> >>
> >> this.interchangeId = interchangeId;
> >>
> >> }
> >>
> >> public Timestamp getCreationTime() {
> >>
> >> return this.creationTime;
> >>
> >> }
> >>
> >>
> >>
> >> public void setCreationTime(Timestamp creationTime) {
> >>
> >> this.creationTime = creationTime;
> >>
> >> }
> >>
> >>
> >> public String getOriginatingChannel() {
> >>
> >> return this.originatingChannel;
> >>
> >> }
> >>
> >> public void setOriginatingChannel(String originatingChannel) {
> >>
> >> this.originatingChannel = originatingChannel;
> >>
> >> }
> >>
> >> }
> >>
> >> 3. HTML Form
> >>
> >> <input name="mybean.creationTime" type="text" size="30" maxlength="30"
> >>
> > value="25/10/2005">
> >
> >> <input name="mybean.originatingChannel" type="text" size="40"
> >> maxlength="40"
> >>
> > value="originating channel1">
> >
> >> <input name="mybean.originatingChannelUserId" type="text" size="60"
> >>
> > maxlength="60" value="originating_channel_userid1">
> >
> >> 4. Exception.
> >>
> >> [28/10/05 14:05:42:623 EST] 3f64a3f WebGroup E SRVE0026E: [Servlet Error]-
> >>
> > [BeanUtils.populate]: org.apache.commons.beanutils.ConversionException:
Timestamp
> > format must be yyyy-mm-dd hh:mm:ss.fffffffff
> >
> >> at
> >>
> >
org.apache.commons.beanutils.converters.SqlTimestampConverter.convert(SqlTimesta
> > mpConverter.java:117)
> >
> >> at
> >>
> >
org.apache.commons.beanutils.ConvertUtilsBean.convert(ConvertUtilsBean.java:428)
> >
> >> at
> >>
> >
org.apache.commons.beanutils.BeanUtilsBean.setProperty(BeanUtilsBean.java:1004)
> >
> >> at
org.apache.commons.beanutils.BeanUtilsBean.populate(BeanUtilsBean.java:811)
> >>
> >> at org.apache.commons.beanutils.BeanUtils.populate(BeanUtils.java:298)
> >>
> >> at org.apache.struts.util.RequestUtils.populate(RequestUtils.java:493)
> >>
> >> at
> >>
> >
org.apache.struts.action.RequestProcessor.processPopulate(RequestProcessor.java:80
> > 5)
> >
> >> at
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:203)
> >>
> >> at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
> >>
> >> at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
> >>
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
> >>
> >> at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
> >>
> >> at
> >>
> >
com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.
> > java:110)
> >
> >> at
> >>
> >
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.j
> > ava:174)
> >
> >> at
> >>
> >
com.ibm.ws.webcontainer.servlet.IdleServletState.service(StrictLifecycleServlet.java:3
> > 13)
> >
> >> at
> >>
> >
com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.ja
> > va:116)
> >
> >> at
> >>
> > com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
> >
> >> at
> >>
> >
com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletRef
> > erenceState.java:42)
> >
> >> at
> >>
> >
com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceR
> > eference.java:40)
> >
> >
> >
> >
> > FOCUS Computing
> > Mob: 0415 24 26 24
> > [EMAIL PROTECTED]
> > http://www.focus-computing.com.au
> >
> >
> >
> >
>
>
>
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http://www.focus-computing.com.au
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