Linux-C cJSON库的使用、编译为cJSON动态库

- 日理万妓 2022-04-23 02:12 590阅读 0赞

### **Linux-C cJSON库的使用、编译为cJSON动态库** ###

**一、简述**

**       记--再linux平台下编译cJSON并简单的使用。**

**       cJSONFiles.zip：链接: https://pan.baidu.com/s/16JkSONzRy2ZzAvjUXcoD5Q 提取码: 2cvh**

**       cJSON-master.zip：链接: https://pan.baidu.com/s/17UzsuOh2iDiQgf099R0iYw 提取码: 2nsh **

**       编译好的库文件：链接: https://pan.baidu.com/s/1jFhRZ8RDpMftlMKZU5M8\_g 提取码: s7ib **

**二、源码下载**

**        官网：**[cJSON download | SourceForge.net][cJSON download _ SourceForge.net]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70][]

**gitgub：**[https://github.com/DaveGamble/cJSON][https_github.com_DaveGamble_cJSON]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 1][]

三、使用例子1

1、从[cJSON download | SourceForge.net][cJSON download _ SourceForge.net]下载的源码

![2018120715143442.png][]

2、解压，进入cJSON文件夹，将其中的cJSON.c,cJSON.h,test.c拷贝到Ubuntu下测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 2][]

3、编译例子并运行

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 3][]

三、使用例子2

1、从[https://github.com/DaveGamble/cJSON][https_github.com_DaveGamble_cJSON]下载的源码

![20181207161347403.png][]

2、解压、将所有文件拷贝到Ubuntu，编译生成库文件

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 4][]

测试代码：json.c文件

#include <stdio.h>
    #include "cJSON.h"
    
    int main(int argc, char* argv[])
    {
    	char buf[1024] = {" {\"date\":\"20181128\"} "};//要解析的json数据
    
    	cJSON * root = cJSON_Parse(buf);//将字符串格式的json数据转化为JSON对象格式
    	if(root == NULL)
    	{
    		printf("parse error\n");
    		return -1;
    	}
    
    	cJSON *value = cJSON_GetObjectItem(root, "date");//根据键"date"获取其对应的值
    	if(value == NULL)
    	{
    		printf("getvalue error\n");
    		return -1;
    	}
    
    	char *data = cJSON_Print(value);//将获取值转化为字符串格式
    	if(data == NULL)
    	{
    		printf("printf error\n");
    		return -1;
    	}
    
    	printf("data=%s\n", data);//打印获取到的json数据
    	
    	return 0;
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 5][]

附：直接使用.c文件编译

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 6][]

[cJSON download _ SourceForge.net]: https://sourceforge.net/projects/cjson/
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70]: /images/20220323/f4de6b41c4cf4bed85a7866cb92c5189.png
[https_github.com_DaveGamble_cJSON]: https://github.com/DaveGamble/cJSON
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 1]: /images/20220323/bd029d7c19ff4633be8b6d71ad05c5da.png
[2018120715143442.png]: /images/20220323/fe5f33f89d6b446a8acbc8061fd1a934.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 2]: /images/20220323/97ca52ccc0e1424aaf70f974d48a34fa.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 3]: /images/20220323/945c09dc58e54ab58979a8e0876c17a1.png
[20181207161347403.png]: /images/20220323/867eb9e535254e438c31388da8fd156d.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L25hbmZlaWJ1eWk_size_16_color_FFFFFF_t_70 4]: /images/20220323/40ae385fc71345f3997a63090cd5fd2f.png
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