資訊專欄INFORMATION COLUMN
引言
當我們通過@ConfigurationProperties注解實現配置 bean的時候,如果默認的配置屬性轉換無法滿足我們的需求的時候,我們可以根據自己的需求通過以下擴展方式對配置屬性進行轉換
PropertyEditorSupport實現下面的例子是把屬性中定義的字符串轉換成Movie,并且把name的值大寫
繼承PropertyEditorSupport并且實現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("繼承[PropertyEditorSupport]類,轉換數據={}", 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);
}
}
注冊自定義的PropertyEditor
@Bean
public CustomEditorConfigurer customEditorConfigurer() {
CustomEditorConfigurer customEditorConfigurer = new CustomEditorConfigurer();
// 有兩種注冊方式 這是第一種
customEditorConfigurer.setPropertyEditorRegistrars(
new PropertyEditorRegistrar[]{ new CustomMovieEditor() });
// 第二 種
Map,Class> maps = new HashMap<>();
maps.put(Movie.class,CustomMovieEditor.class);
return customEditorConfigurer;
}
Converter接口+@ConfigurationPropertiesBinding注解
