[Jsoncpp] example : Basic, Read File / Write File (기본 사용법, 파일 읽고 쓰는 방법)

jsoncpp download and compile 방법 : http://iam777.tistory.com/415

---

샘플 소스는 아래를 참고하세요.

Eclips Project로 생성된 Example Source.

JsonCppTest.tar.gz

사용법은 Jsoncpp 받은 경로에 Doc 폴더 안에 있는 문서를 참고하셔도 됩니다.

jsoncpp.dox

Basic --------------

int main() {
    cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
 
    Json::Value root;
 
    root["encoding"] = true;
    root["encoding2"] = 1000;
    root["indent"]["length"] = 10;
    root["indent"]["use_space"] = -10;
    root["indent"]["length2"] = 10.1;
    root["indent"]["use_space2"] = "testString";
 
    cout << root << endl;
 
    bool boolvalue = root.get("encoding", false).asBool();
    cout << boolvalue << endl;
 
    int intvalue = root.get("encoding2", false).asInt();
    cout << intvalue << endl;
 
    int intSub1 = root["indent"].get("use_space", 0).asInt();
    cout << "intSub1" << intSub1 << endl;
 
    //Cannot Get.....
    int intSub2 = root.get("use_space", 10000).asInt();
    cout << "Cannot Get intSub2 : " << intSub2 <<"  Can get:"<< root["indent"]["use_space"]<< endl;
 
    char *path = (char*)JSON_FILE;
    testJsonReadFile(path);
    path = (char*)JSON_FILE_WRITE;
    testJsonWriteFile(path,root);
    return 0;
}
 

---

Read File ---------------------

int main() {
    cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!
 
    Json::Value root;
 
    root["encoding"] = true;
    root["encoding2"] = 1000;
    root["indent"]["length"] = 10;
    root["indent"]["use_space"] = -10;
    root["indent"]["length2"] = 10.1;
    root["indent"]["use_space2"] = "testString";
 
    cout << root << endl;
 
    bool boolvalue = root.get("encoding", false).asBool();
    cout << boolvalue << endl;
 
    int intvalue = root.get("encoding2", false).asInt();
    cout << intvalue << endl;
 
    int intSub1 = root["indent"].get("use_space", 0).asInt();
    cout << "intSub1" << intSub1 << endl;
 
    //Cannot Get.....
    int intSub2 = root.get("use_space", 10000).asInt();
    cout << "intSub2 : " << intSub2 <<"  "<< root["indent"]["use_space"]<< endl;
 
    char *path = (char*)JSON_FILE;
    testJsonReadFile(path);
    path = (char*)JSON_FILE_WRITE;
    testJsonWriteFile(path,root);
    return 0;
}
 

---

Write File ---------------------

void testJsonWriteFile(char* path, Json::Value inputJsonRoot){
 
    Json::Value confRoot;
    Json::StyledStreamWriter wirter;
    std::ofstream writeOfStream(path);
 
    wirter.write(writeOfStream, inputJsonRoot);
 
    writeOfStream.close();
    cout << "testJsonWriteFile end:"<<  inputJsonRoot << endl;
}