java 使用 Spring MVC 为输入文本设置日期格式
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Set date format for an input text using Spring MVC
提问by davioooh
How can I set the format for a Datein a text field with Spring MVC?
如何Date使用 Spring MVC 在文本字段中设置 a 的格式？
I'm using the Spring Form tag library and the inputtag.
我正在使用 Spring Form 标签库和input标签。
What I get now is something like this Mon May 28 11:09:28 CEST 2012.
我现在得到的是这样的Mon May 28 11:09:28 CEST 2012。
I'd like to show the date in dd/MM/yyyyformat.
我想以dd/MM/yyyy格式显示日期。
回答by NimChimpsky
register a date editor in yr controller :
在 yr 控制器中注册一个日期编辑器：
@InitBinder
protected void initBinder(WebDataBinder binder) {
binder.registerCustomEditor(LocalDate.class, new LocalDateEditor());
}
and then the data editor itself can look like this :
然后数据编辑器本身看起来像这样：
public class LocalDateEditor extends PropertyEditorSupport{
@Override
public void setAsText(String text) throws IllegalArgumentException{
setValue(Joda.getLocalDateFromddMMMyyyy(text));
}
@Override
public String getAsText() throws IllegalArgumentException {
return Joda.getStringFromLocalDate((LocalDate) getValue());
}
}
I am using my own abstract utility class (Joda) for parsing dates, in fact LocalDates from Joda Datetime library- recommended as the standard java date/calendar is an abomination, imho. But you should get the idea. Also, you can register a global editor, so you don't have to do it each controller (I can't remember how).
我正在使用我自己的抽象实用程序类 (Joda) 来解析日期，实际上是来自Joda Datetime 库的LocalDates - 推荐作为标准的 java 日期/日历是可憎的，恕我直言。但你应该明白。此外，您可以注册一个全局编辑器，因此您不必每个控制器都这样做（我不记得是怎么做的）。
回答by davioooh
Done! I just added this method to my controller class:
完毕！我刚刚将此方法添加到我的控制器类中：
@InitBinder
protected void initBinder(WebDataBinder binder) {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd/MM/yyyy");
binder.registerCustomEditor(Date.class, new CustomDateEditor(
dateFormat, false));
}
回答by Kurt Bourbaki
If you want to format all your dates without having to repeat the same code in every Controller, you can create a global InitBinderin a class annotated with @ControllerAdviceannotation.
如果您想格式化所有日期而不必在每个 Controller 中重复相同的代码，您可以在使用@ControllerAdvice注释的类中创建一个全局 InitBinder。
Steps
脚步
1.Create a DateEditor class that will format your dates, like this:
1.创建一个 DateEditor 类来格式化您的日期，如下所示：
public class DateEditor extends PropertyEditorSupport {
public void setAsText(String value) {
try {
setValue(new SimpleDateFormat("dd/MM/yyyy").parse(value));
} catch(ParseException e) {
setValue(null);
}
}
public String getAsText() {
String s = "";
if (getValue() != null) {
s = new SimpleDateFormat("dd/MM/yyyy").format((Date) getValue());
}
return s;
}
2.Create a class annotated with @ControllerAdvice (I called it GlobalBindingInitializer):
2.创建一个用@ControllerAdvice 注解的类（我称之为 GlobalBindingInitializer）：
@ControllerAdvice
public class GlobalBindingInitializer {
/* Initialize a global InitBinder for dates instead of cloning its code in every Controller */
@InitBinder
public void binder(WebDataBinder binder) {
binder.registerCustomEditor(Date.class, new DateEditor());
}
}
3.In your Spring MVC configuration file (for example webmvc-config.xml) add the lines that allow Spring to scan the package in which you created your GlobalBindingInitializer class. For example, if you created GlobalBindingInitializer in the org.example.common package:
3.在您的 Spring MVC 配置文件（例如 webmvc-config.xml）中添加允许 Spring 扫描您在其中创建 GlobalBindingInitializer 类的包的行。例如，如果您在 org.example.common 包中创建了 GlobalBindingInitializer：
<context:component-scan base-package="org.example.common" />
Finished!
完成的！
Sources:
资料来源：
