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2026-06-10

解析JSON字符串 - JsonParse ​

函数简介 ​

解析JSON字符串，将其转换为JSON对象句柄，便于后续操作。

接口名称 ​

JsonParse

DLL调用 ​

c
long JsonParse(string str, int* err);

参数说明 ​

参数名类型说明
str字符串要解析的JSON字符串
err整数型指针错误码输出参数，可为0

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
// 假设 jsonStr 来自 HTTP 响应、文件读取或 MatchImage 等接口
const char* jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
int32_t err = 0;
int64_t root = ola.JsonParse(jsonStr, &err);
if (root != 0 && err == 0) {
    int32_t getErr = 0;
    std::string username = ola.JsonGetString(root, "username", &getErr);
    int32_t getErr = 0;
    double level = ola.JsonGetNumber(root, "level", &getErr);
    ola.JsonFree(root);
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
// 假设 jsonStr 来自 HTTP 响应、文件读取或 MatchImage 等接口
string jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
int err;
long root = ola.JsonParse(jsonStr, out err);
if (root != 0 && err == 0)
{
    int getErr;
    string username = ola.JsonGetString(root, "username", out getErr);
    int getErr;
    double level = ola.JsonGetNumber(root, "level", out getErr);
    ola.JsonFree(root);
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
# 假设 json_str 来自 HTTP 响应、文件读取或 MatchImage 等接口
json_str = '{"username":"ola","enabled":true,"vip":false,"level":10}'
root, err = ola.JsonParse(json_str)
if root != 0 and err == 0:
    username, get_err = ola.JsonGetString(root, "username")
    level, get_err = ola.JsonGetNumber(root, "level")
    ola.JsonFree(root)
java
import com.olaplug.OLAPlugServer;
import com.sun.jna.ptr.IntByReference;

OLAPlugServer ola = new OLAPlugServer();
// 假设 jsonStr 来自 HTTP 响应、文件读取或 MatchImage 等接口
String jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
IntByReference err = new IntByReference(0);
long root = com.olaplug.OLAPlugDLLHelper.JsonParse(jsonStr, err);
if (root != 0 && err.getValue() == 0) {
    com.sun.jna.ptr.IntByReference getErr = new com.sun.jna.ptr.IntByReference(0);
    String username = com.olaplug.OLAPlugServer.PtrToStringUTF8(
        com.olaplug.OLAPlugDLLHelper.JsonGetString(root, "username", getErr));
    com.sun.jna.ptr.IntByReference getErr = new com.sun.jna.ptr.IntByReference(0);
    double level = com.olaplug.OLAPlugDLLHelper.JsonGetNumber(root, "level", getErr);
    ola.JsonFree(root);
}
cpp
var ola = com("OlaPlug.OlaSoft")
// 假设 jsonStr 来自 HTTP 响应等接口
var jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}"
var err = 0
var root = ola.JsonParse(jsonStr, err)
if(root && err == 0) {
    var getErr = 0
    var username = ola.JsonGetString(root, "username", getErr)
    var getErr = 0
    var level = ola.JsonGetNumber(root, "level", getErr)
    ola.JsonFree(root)
}
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
' 假设 jsonStr 来自 HTTP 响应等接口
jsonStr = "{""username"":""ola"",""enabled"":true,""vip"":false,""level"":10}"
err = 0
root = ola.JsonParse(jsonStr, err)
If root <> 0 And err = 0 Then
    getErr = 0
    username = ola.JsonGetString(root, "username", getErr)
    getErr = 0
    level = ola.JsonGetNumber(root, "level", getErr)
    ola.JsonFree(root)
End If
text
.局部变量 ola, OLAPlug
ola.创建 ()
' 假设 jsonStr 来自 HTTP 响应等接口
jsonStr ＝ “{“username“:“ola“,“enabled“:true,“vip“:false,“level“:10}“
err ＝ 0
root ＝ ola.JsonParse (jsonStr, err)
.如果真 (root ≠ 0 且 err ＝ 0)
    getErr ＝ 0
    username ＝ ola.JsonGetString (root, "username", getErr)
    getErr ＝ 0
    level ＝ ola.JsonGetNumber (root, "level", getErr)
    ola.JsonFree (root)
.如果真结束
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
// 假设 jsonStr 来自 HTTP 响应等接口
var jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
var err = 0;
var root = ola.JsonParse(jsonStr, err);
if(root && !err){
    var getErr = 0;
    var username = ola.JsonGetString(root, "username", getErr);
    var getErr = 0;
    var level = ola.JsonGetNumber(root, "level", getErr);
    ola.JsonFree(root);
}
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
// 假设 jsonStr 来自 HTTP 响应等接口
文本型 jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}"
整数 err = 0
长整数 root = ola.JsonParse(jsonStr, err)
如果真 (root ≠ 0 且 err ＝ 0)
{
    整数 getErr = 0
    文本型 username = ola.JsonGetString(root, "username", getErr)
    整数 getErr = 0
    双精度 level = ola.JsonGetNumber(root, "level", getErr)
    ola.JsonFree(root)
}
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
// 假设 jsonStr 来自 HTTP 响应、文件读取或 MatchImage 等接口
const char* jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
int32_t err = 0;
int64_t root = ola.JsonParse(jsonStr, &err);
if (root != 0 && err == 0) {
    int32_t getErr = 0;
    std::string username = ola.JsonGetString(root, "username", &getErr);
    int32_t getErr = 0;
    double level = ola.JsonGetNumber(root, "level", &getErr);
    ola.JsonFree(root);
}

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
const char* jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
int err = 0;
long root = JsonParse(instance, jsonStr, &err);
if (root != 0 && err == 0) {
    long ptr = JsonGetString(instance, root, "username", 0);
    if (ptr != 0) {
        char username[256] = {0};
        GetStringFromPtr(ptr, username, sizeof(username));
        FreeStringPtr(ptr);
    }
    JsonFree(instance, root);
}
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
string jsonStr = "{\"username\":\"ola\",\"enabled\":true,\"vip\":false,\"level\":10}";
int err = 0;
long root = JsonParse(instance, jsonStr, err);
if (root != 0 && err == 0)
{
    long ptr = JsonGetString(instance, root, "username", 0);
    if (ptr != 0) {
        StringBuilder sb = new StringBuilder(GetStringSize(ptr) + 1);
        GetStringFromPtr(ptr, sb, sb.Capacity);
        FreeStringPtr(ptr);
    }
    JsonFree(instance, root);
}
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
json_str = b'{"username":"ola","enabled":true,"vip":false,"level":10}'
err = c_int(0)
root = ola.JsonParse(instance, json_str, err)
if root and err.value == 0:
    uerr = c_int(0)
    ptr = ola.JsonGetString(instance, root, b"username", uerr)
    if ptr:
        buf = create_string_buffer(256)
        ola.GetStringFromPtr(ptr, buf, 256)
        ola.FreeStringPtr(ptr)
    ola.JsonFree(instance, root)

返回值 ​

返回解析后的JSON对象句柄，失败时返回0。错误码通过 err 参数返回。

注意事项 ​

  • 返回的JSON对象句柄需要调用 JsonFree 释放内存
  • 支持标准JSON格式，包括对象、数组、字符串、数字、布尔值和null