java中在使用copyProperties方法时,源对象比目标对象的属性名多个前缀,如何定义一个属性名转换器,代码要简洁优化,且包括需要导入的库和依赖语句,且用springboot2
时间: 2024-03-22 12:42:08 浏览: 18
要实现属性名转换器,可以使用Spring Framework中提供的BeanUtils类,通过自定义PropertyNamingStrategy实现属性名的转换。以下是代码示例:
首先,需要在pom.xml中添加BeanUtils的依赖:
```xml
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>5.3.9</version>
</dependency>
```
然后,在Spring Boot的配置文件中添加以下配置:
```yaml
spring:
application:
name: your-application-name
jackson:
property-naming-strategy: com.example.YourPropertyNamingStrategy
```
接下来,定义一个自定义的PropertyNamingStrategy类:
```java
package com.example;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.cfg.MapperConfig;
import com.fasterxml.jackson.databind.introspect.AnnotatedField;
import com.fasterxml.jackson.databind.introspect.AnnotatedMethod;
import com.fasterxml.jackson.databind.introspect.AnnotatedParameter;
public class YourPropertyNamingStrategy extends PropertyNamingStrategy {
@Override
public String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) {
return convertFieldName(defaultName);
}
@Override
public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
return convertFieldName(defaultName);
}
@Override
public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {
return convertFieldName(defaultName);
}
@Override
public String nameForConstructorParameter(MapperConfig<?> config, AnnotatedParameter ctorParam, String defaultName) {
return convertFieldName(defaultName);
}
private String convertFieldName(String defaultName) {
// 自定义属性名转换规则,例如去除前缀"prefix_"
return defaultName.replace("prefix_", "");
}
}
```
最后,在代码中使用BeanUtils.copyProperties方法时,指定源对象和目标对象,并在其中添加自定义的属性名转换器:
```java
BeanUtils.copyProperties(source, target, new YourPropertyNamingStrategy());
```
这样就可以实现源对象和目标对象属性名不匹配时的属性名转换。
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