我有Spring Boot Application,其实现包含具有以下功能的方法。该实现使用2个DTO与之绑定数据。有什么合适的方法可以将值从JAY传递给硬编码为[10.00的值吗?我有“ this :: convertProfileToProfileCreditDTO的主要问题,是否可以在此表达式中传递参数?我已使用Java DTO Object search mechanism?进行渗透
如果我尝试在以下代码中添加一个参数:this :: convertProfileToProfileCreditDTO抱怨返回类型错误
convertProfileToProfileCreditDTO(final Profile theProfile, Double JAY)
实施
@Override
public Double testThisParam(Double profileCredit) {
Double JAY = profileCredit;
log.error(String.valueOf(JAY));
return JAY;
}
@Override
public Page<ProfileCreditDTO> findProfileBySelectedParameters(String username, Pageable pageable) {
Page<Profile> searchData= profileRepository.findByAllParameters(username, pageable);
Page<ProfileCreditDTO> searchProfileData=null;
if(searchData != null)
searchProfileData=searchData.map(this::convertProfileToProfileCreditDTO);
return searchProfileData;
}
public ProfileCreditDTO convertProfileToProfileCreditDTO(final Profile theProfile ){
if(theProfile == null)
return null;
ProfileCreditDTO theDTO= new ProfileCreditDTO();
theDTO.setProfile(theProfile);
CreditDTO theCreditDto = profileCreditClient.findClientByProfileId(theProfile.getId(), 10.00);
if(theCreditDto != null )
theDTO.setCredit(theCreditDto);
else {
return null;
}
return theDTO;
}
您总是可以将更多参数传递给lambda表达式
searchProfileData = searchData.map(x -> this.convertProfileToProfileCreditDTO(x, JAY));
附带说明,如果您想使用this::
样式简化函数调用,则可以创建一个数据对象以携带所需的参数
class MyObject {
Profile theProfile;
Double JAY;
// public constructor with parameters
}
// then construct and use this
MyObject o = new MyObject(theProfile, testThisParam(...));
// and then change parameter of target method
convertProfileToProfileCreditDTO(MyObject myObject) ...