java.beans.PropertyEditorManager.findEditor(Locale.class) 在 spring 中返回 null

Question

根据spring ref docs :

Spring uses the java.beans.PropertyEditorManager to set the search path for property editors that might be needed.

但我在这里得到空:

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import java.beans.PropertyEditor;
import java.beans.PropertyEditorManager;
import java.util.Locale;

public class DefaultEditorsTest {

    public static void main (String[] args) {
        ApplicationContext context = new
                            ClassPathXmlApplicationContext("spring-config.xml");

        PropertyEditor editor = PropertyEditorManager.findEditor(Locale.class);
        System.out.println(editor);
    }
}

输出:

Sep 13, 2016 8:47:29 PM org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@17f052a3: startup date [Tue Sep 13 20:47:29 CDT 2016]; root of context hierarchy
Sep 13, 2016 8:47:29 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [spring-config.xml]
null 

我的 spring-config.xml 实际上注册了几个 bean。为什么我的会变成null？如果这不是正确的方法那么如何获取 spring 的 LocaleEditor 和其他实例？我想在 swing 应用程序中使用它，并且我可能会使用 spring 提供的许多应用程序，所以我不想手动注册它们。 提前致谢。

Answer 1

您可以使用BeanWrapperImpl。( http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/beans/BeanWrapperImpl.html )

Note: Auto-registers default property editors from the org.springframework.beans.propertyeditors package, which apply in addition to the JDK's standard PropertyEditors.

BeanWrapperImpl wrapper = new BeanWrapperImpl(bean);  
PropertyEditor editor = wrapper.getDefaultEditor(Locale.class);
System.out.println(editor);