如何在Spring xml配置文件中初始化Java Date对象？

Consider this simple example -

考虑这个简单的例子 -

public class Person {    private String name;    private Date dateOfBirth;    // getters and setters here... }

In order to initialize Person as a Spring bean, I can write the following.

为了将Person初始化为Spring bean,我可以编写以下内容。

<bean id = "Michael" class = "com.sampleDomainName.Person"><property name = "name" value = "Michael" /></bean>

But in the above bean definition, how can I set the dateOfBirth?

但是在上面的bean定义中,我该如何设置dateOfBirth?

For eg. I want to set the dateOfBirth as

例如。我想将dateOfBirth设置为

1998-05-07

4 个解决方案

#1

Treat it like any other POJO (which is is)

像任何其他POJO一样对待它(这是)

<property name="dateOfBirth">  <bean class="java.util.Date" /></property>

If you need to use an explicit value (such as 1975-04-10), then simply call one of the other constructors (although those which take year-month-day are deprecated). You could also use an explicit java.beans.PropertyEditor which Spring rolls with already (see section 6.4.2; note that you can write your own editors and register them for your own types). You need to register the CustomEditorConfigurer in your config:

如果您需要使用显式值(例如1975-04-10),那么只需调用其中一个构造函数(尽管那些采用年度 - 月 - 日的构造函数已弃用)。您还可以使用Spring已经推出的显式java.beans.PropertyEditor(请参阅第6.4.2节;请注意,您可以编写自己的编辑器并将其注册为您自己的类型)。您需要在配置中注册CustomEditorConfigurer:

<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">  <property name="customEditors">    <map>      <entry key="java.util.Date"              value="org.springframework.beans.propertyeditors.CustomDateEditor"/>    </map>  </property> </bean>

Then your data looks like:

然后你的数据看起来像:

<property name="dateOfBirth" value="1975-04-10" />

I might add that Date is not an appropriate data type to store a date-of-birth because Date is really an instant-in-time. You might like to look at Joda and use the LocalDate class.

我可能会补充一点,Date不是用于存储出生日期的合适数据类型,因为Date实际上是即时的。您可能希望查看Joda并使用LocalDate类。

#2

One of the answers mentioned here is useful, but it needs additional information. The constructor arguments for the CustomDateEditor need to be supplied.

这里提到的答案之一很有用,但它需要额外的信息。需要提供CustomDateEditor的构造函数参数。

<bean class="org.springframework.beans.factory.config.CustomEditorConfigurer">  <property name="customEditors">    <map>      <entry key="java.util.Date"> <ref local = "customDateEditor" />       </entry>     </map>  </property> </bean><bean id = "customDateEditor" class="org.springframework.beans.propertyeditors.CustomDateEditor">    <constructor-arg>      <bean class="java.text.SimpleDateFormat">          <constructor-arg value="yyyy-MM-dd" />       </bean>    </constructor-arg>    <constructor-arg value="true" /> </bean>

Now we can do

现在我们可以做到

<property name="dateOfBirth" value="1998-05-07" />

#3

Spring inject Date into bean property – CustomDateEditor

Spring将日期注入bean属性 - CustomDateEditor

This paper give two suggestions:

本文提出两点建议:

Factory bean
CustomDateEditor

I suggest the "Factory Bean" because the CustomDateEditor is not supported in Spring 4.0+ and the Factory Bean is easy enough to use.

我建议使用“Factory Bean”,因为Spring 4.0+不支持CustomDateEditor,并且Factory Bean很容易使用。

<beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xsi:schemaLocation="http://www.springframework.org/schema/beans    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">    <bean id="dateFormat" class="java.text.SimpleDateFormat">        <constructor-arg value="yyyy-MM-dd" />    </bean>    <bean id="customer" class="com.mkyong.common.Customer">        <property name="date">            <bean factory-bean="dateFormat" factory-method="parse">                <constructor-arg value="2010-01-31" />            </bean>        </property>    </bean></beans>

#4

Use a CustomDateEditor. It's been in Spring since the early days.

使用CustomDateEditor。它从早期开始就在春天。

#1