Question

我正在开发一个c ++项目，我需要比较两个或多个Json字符串，它将作为函数中的参数传递给我，我必须相应地返回一个bool。我正在使用Jsoncpp，但我无法比较两个Json数据的全部。我想知道循环键和值的最佳过程，并使用另一个json字符串的相应值检查值（两个String都将传递给函数，并将使用jsoncpp的reader.parse（）解析，然后我需要比较它们并返回bool值）。有人可以帮我这个吗？先感谢您。我被困的地方：

class test {
public:
static bool isequalstring(const std::string &item1, const std::string 
&item2, const std::string &temp) {

    Document d1;
    d1.Parse(item1.c_str());
    Document d2;
    d2.Parse(item2.c_str());

    Document d3;
    d3.Parse(temp.c_str());


    bool matched = true;
    //itr= iterate through the third json to get the keys and match the keys in first and second
    for (auto itr = d3.MemberBegin(); itr != d3.MemberEnd(); itr++) {

        if (d1.HasMember(itr->name) && d2.HasMember(itr->name)) {       // if the member doesn't exist in both, break
            if (d1[itr->name] != d2[itr->name]) {
                // value doesn't match, then break
                matched = false;

                break;

            }

        } else {
            matched = false;
            break;
        }
    }
    return matched;
}
  };
bool testDeepNestedJson_should_succeed(){
bool expectedTestResult = true;
bool testResult;

// Input 1 JSON Object
const char* input1 = "{\"array\":[1,2,3],\"boolean\":true,\"null\":null,\"number\":123,\"object\":{\"a\":\"b\",\"c\":\"d\",\"e\":\"f\"},\"string\":\"Hello World\",\"object_array\":[{\"key\":\"value1\"},{\"key\":\"value2\"},{\"key\":\"value3\"}],\"deep_nested_array\":[{\"object_array\":[{\"key\":\"value1\"},{\"key\":\"value2\"},{\"key\":\"value3\"}]},{\"object_array\":[{\"key\":\"value4\"},{\"key\":\"value5\"},{\"key\":\"value6\"}]}]}";
const char* input2 = "{\"array\":[1,2,3],\"justsomedata\":true,\"boolean\":true,\"null\":null,\"object\":{\"a\":\"b\",\"c\":\"d\",\"e\":\"f\"},\"number\":123,\"object_array\":[{\"key\":\"value1\"},{\"key\":\"value2\"},{\"key\":\"value3\"}],\"deep_nested_array\":[{\"object_array\":[{\"key\":\"value1\"},{\"key\":\"value2\"},{\"key\":\"value3\"}]},{\"object_array\":[{\"key\":\"value4\"},{\"key\":\"value5\"},{\"key\":\"value6\",\"ignoreme\":12346}]}],\"string\":\"Hello World\"}";
const char* stencil = "{\"array\":[null],\"boolean\":null,\"null\":null,\"object\":{\"a\":null,\"c\":null,\"e\":null},\"number\":null,\"object_array\":[{\"key\":null}],\"deep_nested_array\":[{\"object_array\":[{\"key\":null}]}],\"string\":null}";

testResult = test::isequalstring(input1, input2, stencil);

if(testResult != expectedTestResult){
    std::cout<<"testDeepNestedJson_should_succeed:"<<std::endl;
    std::cout<<"Item1:"<<input1<<std::endl;
    std::cout<<"Item2:"<<input2<<std::endl;
    std::cout<<"Stencil:"<<stencil<<std::endl;

    std::cout<<"Test Failed result is: False expected was: True"<<std::endl;

    return false;
}

std::cout<<"PASSED: testDeepNestedJson_should_succeed"<<std::endl;

return true;
}
int main() {
testDeepNestedJson_should_succeed();
return 0;
}

Answer 1

使用RapidJSON，代码将是这样的

Note: the configuration refers to the unknown class 'com.google.android.gms.common.internal.safeparcel.SafeParcelable'

Note: the configuration refers to the unknown class 'android.app.OnActivityPausedListener'

Note: the configuration refers to the unknown class 'com.mopub.nativeads.CustomEventNative'

Maybe you meant the fully qualified name 'com.google.android.gms.ads.mediation.customevent.CustomEventNative'?

Note: the configuration refers to the unknown class 'com.mopub.nativeads.CustomEventRewardedAd'

Note: the configuration refers to the unknown class 'Object'
      Maybe you meant the fully qualified name 'java.lang.Object'?

Answer 2

您可以使用name()迭代root2，获取密钥名称，使用operator[]访问root和root1中包含该名称的值，然后进行比较他们使用operator==：

for (auto it = root2.begin(); it != root2.end(); ++it) {
    auto name = it.name();
    if (root[name] != root1[name])
        return false;
}
return true;

<子>顺便说一句。您将item1解析为root，将item2解析为root1，将temp解析为root2。你可以在命名方面更加一致。

Json string Comparision

2 个答案: