---
title: 使用示例
description: "提供鲲鹏Json库函数接口完整使用示例。"
url: https://www.hikunpeng.com/document/detail/zh/kunpengaccel/system-lib/dg-ajsonl/kunpengaccel_json_16_0007.html
sourcePath: /source/zh/kunpengaccel/system-lib/dg-ajsonl/kunpengaccel_json_16_0007.html
indexId: e1444c687e053999921366491ba5415a7a7e1f2575d4831f163634c60cd2177a75
---
# 使用示例

提供鲲鹏Json库函数接口完整使用示例。

1. 创建test.cpp文件。

```
vi test.cpp
```


2. 按“i”进入编辑模式，在文件中添加以下内容。

```
#include <iostream>
#include "com_google_gson_JsonElement.h"
#include "com_google_gson_JsonParser.h"
#include "com_google_gson_Gson.h"
#include "com_google_gson_GsonObject.h"
int main()
{
std::string json_str = R"(
{
"intValue": 42,
"longValue": 1726819335,
"shortValue": 996,
"doubleValue": 3.14,
"floatValue": 0.00159,
"stringValue": "Hello, World!",
"stringValueFromInt64": 1726819335,
"arrayValue": [1, 2, 3],
"boolValue": true,
"objectValue": {
"nestedInt": 100,
"nestedString": "Nested"
},
"arrayObject": [
{"name": "hua", "age": 18},
{"name": "wei", "age": 20}
]
}
)";
String tmpStr(json_str);
JsonElement *newElement = JsonParser::parseString(&tmpStr);
GsonObject *gsonObject = newElement->getAsJsonObject();
int intValue = gsonObject->get("intValue")->getAsInt();
double doubleValue = gsonObject->get("doubleValue")->getAsDouble();
String *stringValue = gsonObject->get("stringValue")->getAsString();
std::cout << "intValue: " << intValue << std::endl;
std::cout << "doubleValue: " << doubleValue << std::endl;
std::cout << "stringValue: " << stringValue->ref() << std::endl;
std::string serializeResult = gsonObject->toString();
std::cout << "toString: " << serializeResult << std::endl;
return 0;
}
```


3. 按“Esc”键，输入:wq!，按“Enter”保存并退出编辑。
4. 编译test.cpp文件，指定输出的可执行文件名称为testDemo。

```
g++ -o testDemo test.cpp -I./include/kacc_gson_shell -I./include/ -I./util/OmniStream_Java_Basictypes/include/ -I/usr/local/ksl/include  -L./output -lkaccgson -L./util/OmniStream_Java_Basictypes/lib/ -lJavaBasictypes -lJavaFunctions -L/usr/local/ksl/lib -lKHSEL_ops
```


  OmniStream_Java_Basictypes为OmniStream的Java基础库相关头文件和库文件， /usr/local/ksl为鲲鹏系统库相关头文件和库文件

5. 执行可执行文件testDemo。

```
./testDemo
```


  输出回显信息如下所示。

```
intValue: 42
doubleValue: 3.14
stringValue: Hello, World!
toString: {"intValue":42,"longValue":1726819335,"shortValue":996,"doubleValue":3.14,"floatValue":0.00159,"stringValue":"Hello, World!","stringValueFromInt64":1726819335,"arrayValue":[1,2,3],"boolValue":true,"objectValue":{"nestedInt":100,"nestedString":"Nested"},"arrayObject":[{"name":"hua","age":18},{"name":"wei","age":20}]}
```