Qt文件和json

qt中创建普通c++类

头文件

1#ifndef OPERATION_H
2#define OPERATION_H
3
4#include <QFile>
5// 默认配置文件路径
6const QString FilePath = "./config.json";
7
8typedef struct FileConfig {
9    QString ip;
10    QString port;
11    QString username;
12    QString password;
13    QString filepath;
14    bool    is_save_pwd;
15}fileConfig;
16// 判断目录是否存在
17bool isFile(const QString file=FilePath);
18
19// 饿汉模式单例
20class FileOperation
21{
22public:
23    void writeConfig(fileConfig config);
24    bool readConif(fileConfig* config);
25
26    static FileOperation* getInstance()
27    {
28        return pSingleton;
29    }
30private:
31    static FileOperation *pSingleton;
32    FileOperation(){}
33    ~FileOperation(){}
34    FileOperation(FileOperation&){}
35};
36
37#endif // OPERATION_H

源文件

1// 在头文件初始化会出现重复定义？
2FileOperation* FileOperation::pSingleton = new FileOperation;
3
4void FileOperation::writeConfig(fileConfig config)
5{
6    // 保存写入数据
7    QJsonObject obj;
8    obj.insert("IP", config.ip);
9    obj.insert("PORT", config.port);
10    obj.insert("USERNAME", config.username);
11    obj.insert("PASSWORD", config.password);
12    obj.insert("FILEPATH", FilePath);
13    obj.insert("IS_SAVE", config.is_save_pwd);
14    QJsonDocument doc(obj);
15    QByteArray json = doc.toJson();
16    QFile file(FilePath);
17    file.open(QIODevice::WriteOnly | QIODevice::Text);
18    file.write(json.data(), json.size());
19    file.close();
20}
21
22bool FileOperation::readConif(fileConfig* config)
23{
24    if(isFile())
25    {
26        QFile file(FilePath);
27        file.open(QIODevice::ReadOnly | QIODevice::Text);
28        QByteArray data = file.readAll();
29        file.close();
30        QJsonDocument doc = QJsonDocument::fromJson(data);
31        QJsonObject obj = doc.object();
32        config->ip = obj.value("IP").toString();
33        config->port = obj.value("PORT").toString();
34        config->username = obj.value("USERNAME").toString();
35        config->password = obj.value("PASSWORD").toString();
36        config->filepath = obj.value("FILEPATH").toString();
37        config->is_save_pwd = obj.value("IS_SAVE").toBool();
38        return true;
39    }
40    return false;
41}
42
43
44
45bool isFile(const QString file)
46{
47    return QFile::exists(file);
48}

完整代码在码云上持续更新中。。

https://gitee.com/YiZhiLuGuoDeXiaoMaNong/personnel-management