如何在Java中返回多个JSON项的列表，第2部分 [英] How to return a list of multiple JSON items in java, part 2

问题描述

此问题是此问题中返回多个JSON项目的列表.

同样，我对Java和JSON完全陌生，所以我一点也不了解.我能够进一步解决上述问题，但是现在我遇到了更多问题，即(基本上)如何返回多个JSON列表的语法.(我从SpringBoot获得了这些代码，但我真的不知道它们是如何工作的；我仍在学习Java.)

Again, I am completely new to Java and JSON, so I don't know much at all. I was able to proceed a little further with the answers from the question mentioned above, but now I have encountered more issues, namely (basically) the syntax of how to return the list of multiple JSON. (I got these codes from SpringBoot, and I really don't know how it all works; I am still learning Java.)

目前，这是我尝试过的:

Currently, this is what I've tried:

@GetMapping("reports/{userID}")
public ResponseEntity<LookupResponseList> getDirectReports(@PathVariable String userID) {
    Optional<List<LDAPModel>> ldapModel = ldapService.getDirectReports(userID);
        if (!ldapModel.isPresent()) {
            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
        }
        LookupResponseResultList result = ldapMapper.toLookupResponseResultList(ldapModel.get());
        return ResponseEntity.ok(LookupResponseList.result(result, LookupResponseList.class));
    }

但是我不知道如何在上面的代码中，在我试图获得结果的那一行上返回列表:

But I don't know how to return the list in the code above, on the line where I am trying to get the result:

LookupResponseResultList result = ldapMapper.toLookupResponseResultList(ldapModel.get());

ldapMapper.toLookupResponseResultList 的代码如下:

The code for ldapMapper.toLookupResponseResultList is below:

   public LookupResponseResultList toLookupResponseResultList(List<LDAPModel> ldapModel) {
        return LookupResponseResultList.builder()
                .userId(ldapModel.toString())
//                .userId(ldapModel.getUserId())
//                .telephoneNumber(ldapModel.getTelephoneNumber())
                .build();
    }

两条要注释的行是我想要的.我可以在注释行上方的行中看到整个JSON结构，即:

The two commented line is what I want. I can see the entire JSON structure in the line above the commentted line, which is this:

{
    "result": {
    "userId": "[LDAPModel(userId=abcde123,telephoneNumber=1-555-5555555), LDAPModel(userId=fghi456,telephoneNumber=1-333-3333333)]",
    },
    "error": null
}

如何使toLookupResponseResultList返回多个JSON列表(如下所示)而不是字符串?

How can I make it so that toLookupResponseResultList return a list of multiple JSON (like below) instead of a string?

{
"result": [
    {
      "userId": "abcde123",
      "telephoneNumber": "1-555-5555555"
    },
    {
      "userId": "fghi456",
      "telephoneNumber": "1-333-3333333"
    }
    ],
"error": null

}

LookupResponseResultList类在下面:

LookupResponseResultList class is below:

public class LookupResponseList extends BaseBodyResponse<LookupResponseList.LookupResponseResultList> {
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public static class LookupResponseResultList {
    String userId;
    String telephoneNumber;
}

推荐答案

问题在 -

   public LookupResponseResultList toLookupResponseResultList(List<LDAPModel> ldapModel) {
    return LookupResponseResultList.builder()
            .userId(ldapModel.toString()) // THIS LINE
            .build();
}

此LookupResponseResultList类必须接受LDAPModel对象的列表.

This LookupResponseResultList class must accept a List of LDAPModel objects.

class LookupResponseResultList {
    @JsonProperty
    private List<LDAPModel> result;

    private String error.
}

修改您的构建器，而不是使用ldapModel.toString()设置字符串，而是提供列表本身.

Modify your builder and instead of setting a string using ldapModel.toString(), provide the list itself.

当前，您的LookupResponseResultList类具有List的字符串表示形式.提供列表而不是字符串.

Currently, your LookupResponseResultList class is having a string representation of List. Provide the list instead of string.

这篇关于如何在Java中返回多个JSON项的列表，第2部分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！