Java传递变量到映射的DTO方法? [英] Java pass variable into mapped DTO method?

问题描述

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 传递到硬编码" 10.00 "的值吗?我的主要问题是 this :: convertProfileToProfileCreditDTO ，是否可以在此表达式中传递参数?
我已经使用 Java DTO对象搜索机制来进行渗透

I have Spring Boot Application with implementation containing methods with following functions. The implementation uses 2 DTO's to bind data with. Is there an appropriate way how I could pass value from JAY to value where '10.00' is hardcoded? I have main issue with 'this::convertProfileToProfileCreditDTO' is it possible to pass a parameter in this expression?
I have used Java DTO Object search mechanism? for insipration

如果我尝试在以下代码中添加一个参数，该代码将被以下代码截断:: convertProfileToProfileCreditDTO抱怨返回类型错误

If I try to add a parameter within code snipped below the this::convertProfileToProfileCreditDTO complains about bad return type

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;
    }

推荐答案

您始终可以将更多参数传递给lambda表达式

You can always pass more parameters to a lambda expression

searchProfileData = searchData.map(x -> this.convertProfileToProfileCreditDTO(x, JAY));

请注意，如果要使用this::样式使函数调用保持简单，则可以创建一个数据对象以携带所需的参数

As a side note, if you want to keep the functional call simple with this:: style, you can create a data object to carry in your required parameters

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) ...

这篇关于Java传递变量到映射的DTO方法?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！