引言
当我们通过@ConfigurationProperties注解实现配置 bean的时候,如果默认的配置属性转换无法满足我们的需求的时候,我们可以根据自己的需求通过以下扩展方式对配置属性进行转换
PropertyEditorSupport实现下面的例子是把属性中定义的字符串转换成Movie,并且把name的值大写
继承PropertyEditorSupport并且实现PropertyEditorRegistrar接口
package com.paderlol.spring.practice.properties.editor;
import com.paderlol.spring.practice.properties.pojo.Movie;
import java.beans.PropertyEditorSupport;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.PropertyEditorRegistrar;
import org.springframework.beans.PropertyEditorRegistry;
/**
* @author pader PropertyEditor 在不同的包下面
*/
@Slf4j
public class CustomMovieEditor extends PropertyEditorSupport
implements PropertyEditorRegistrar {
@Override
public String getAsText() {
Movie movie = (Movie) getValue();
return movie == null ? "" : movie.getName();
}
@Override
public void setAsText(String text) throws IllegalArgumentException {
log.info("继承[PropertyEditorSupport]类,转换数据={}", text);
String[] data = text.split("-");
Movie movie = Movie.builder().name(data[0]
.toUpperCase()).seat(Integer.parseInt(data[1]))
.build();
setValue(movie);
}
@Override
public void registerCustomEditors(PropertyEditorRegistry registry) {
registry.registerCustomEditor(Movie.class,this);
}
}
注册自定义的PropertyEditor
@Bean
public CustomEditorConfigurer customEditorConfigurer() {
CustomEditorConfigurer customEditorConfigurer = new CustomEditorConfigurer();
// 有两种注册方式 这是第一种
customEditorConfigurer.setPropertyEditorRegistrars(
new PropertyEditorRegistrar[]{ new CustomMovieEditor() });
// 第二 种
Map,Class> maps = new HashMap<>();
maps.put(Movie.class,CustomMovieEditor.class);
return customEditorConfigurer;
}
Converter接口+@ConfigurationPropertiesBinding注解
