QT5.9 INI参数配置文件读写
介绍下一种简单的配置文件ini的读写，一句话：简单
1、#include <QSettings>
2、ini文件书写格式：
[DevOption]
mainFun=25
subFun=40
service=1
3、读写ini文件
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4、这种.ini配置文件书写简单易懂，也易于操作，也是比较常见的配置文件
研究了以下Qt下ini文件的读写，不废话，上干货。
写入ini文件
WriteIni.cpp
1 void WriteIni::writeSettings()
2 {
3 QSettings settings("config.ini", QSettings::IniFormat); // 当前目录的INI文件
4
5 settings.beginGroup("mountinfo");
6 settings.setValue("mount",6);
7 settings.endGroup();
8
9 settings.beginGroup("v");
10 settings.setValue("v1",14.2);
11 settings.setValue("v2",14.3);
12 settings.setValue("v3",14.4);
13 settings.setValue("v4",14.5);
14 settings.setValue("v5",14.6);
15 settings.setValue("v6",14.8);
16 settings.endGroup();
17
18 settings.beginGroup("a");
19 settings.setValue("a1",2.0);
20 settings.setValue("a2",2.1);
21 settings.setValue("a3",2.2);
22 settings.setValue("a4",2.3);
23 settings.setValue("a5",2.4);
24 settings.setValue("a6",2.5);
25 settings.endGroup();
26
27 settings.beginGroup("p");
28 settings.setValue("p1",126);
29 settings.setValue("p2",138);
30 settings.setValue("p3",139);
31 settings.setValue("p4",140);
32 settings.setValue("p5",141);
33 settings.setValue("p6",142);
34 settings.endGroup();
35
36 settings.beginGroup("j");
37 settings.setValue("j1",4.8);
38 settings.setValue("j2",4.9);
39 settings.setValue("j3",4.7);
40 settings.setValue("j4",4.6);
41 settings.setValue("j5",4.5);
42 settings.setValue("j6",4.4);
43 settings.endGroup();
44 }
读取ini文件
ReadConfig.cpp
1 void GetConfigIni::getConfigMount()
2 {
3 QVariant strConfigValue;
4 QString strConfigGroup = "";
5 QString strConfigKey = "";
6
7 QString strfile;
8
9 //strfile = QDir::currentPath();//QCoreApplication::applicationDirPath();
10
11
12 QString fileName = "config.ini";
13
14 strfile += fileName;
15 QSettings user_cfg(strfile,QSettings::IniFormat);
16 user_cfg.setIniCodec("UTF-8");
17 strConfigGroup = tr("mountinfo");
18 user_cfg.beginGroup(strConfigGroup);
19
20 strConfigKey = "mount";
21 strConfigValue = user_cfg.value(strConfigKey);
22
23 int Mount = strConfigValue.toInt();
24
25 qDebug()<<"mount*************"<<Mount<<endl;
26
27 user_cfg.endGroup();
28
29 strConfigGroup = tr("v");
30 user_cfg.beginGroup(strConfigGroup);
31
32 strConfigKey = "v1";
33 strConfigValue = user_cfg.value(strConfigKey);
34 qDebug() << "v1=*********"<<strConfigValue;
35
36 strConfigKey = "v2";
37 strConfigValue = user_cfg.value(strConfigKey);
38 qDebug() << "v2=*********"<<strConfigValue;
39
40 strConfigKey = "v3";
41 strConfigValue = user_cfg.value(strConfigKey);
42 qDebug() << "v3=*********"<<strConfigValue;
43
44 strConfigKey = "v4";
45 strConfigValue = user_cfg.value(strConfigKey);
46 qDebug() << "v4=*********"<<strConfigValue;
47
48 strConfigKey = "v5";
49 strConfigValue = user_cfg.value(strConfigKey);
50 qDebug() << "v5=*********"<<strConfigValue;
51
52 strConfigKey = "v6";
53 strConfigValue = user_cfg.value(strConfigKey);
54 qDebug() << "v6=*********"<<strConfigValue;
55
56 user_cfg.endGroup();
57
58 strConfigGroup = tr("a");
59 user_cfg.beginGroup(strConfigGroup);
60
61 strConfigKey = "a1";
62 strConfigValue = user_cfg.value(strConfigKey);
63 qDebug() << "a1=*********"<<strConfigValue;
64
65 strConfigKey = "a2";
66 strConfigValue = user_cfg.value(strConfigKey);
67 qDebug() << "a2=*********"<<strConfigValue;
68
69 strConfigKey = "a3";
70 strConfigValue = user_cfg.value(strConfigKey);
71 qDebug() << "a3=*********"<<strConfigValue;
72
73 strConfigKey = "a4";
74 strConfigValue = user_cfg.value(strConfigKey);
75 qDebug() << "a4=*********"<<strConfigValue;
76
77 strConfigKey = "a5";
78 strConfigValue = user_cfg.value(strConfigKey);
79 qDebug() << "a5=*********"<<strConfigValue;
80
81 strConfigKey = "a6";
82 strConfigValue = user_cfg.value(strConfigKey);
83 qDebug() << "a6=*********"<<strConfigValue;
84
85 user_cfg.endGroup();
86
87 strConfigGroup = tr("p");
88 user_cfg.beginGroup(strConfigGroup);
89
90 strConfigKey = "p1";
91 strConfigValue = user_cfg.value(strConfigKey);
92 qDebug() << "p1=*********"<<strConfigValue;
93
94 strConfigKey = "p2";
95 strConfigValue = user_cfg.value(strConfigKey);
96 qDebug() << "p2=*********"<<strConfigValue;
97
98 strConfigKey = "p3";
99 strConfigValue = user_cfg.value(strConfigKey);
100 qDebug() << "p3=*********"<<strConfigValue;
101
102 strConfigKey = "p4";
103 strConfigValue = user_cfg.value(strConfigKey);
104 qDebug() << "p4=*********"<<strConfigValue;
105
106 strConfigKey = "p5";
107 strConfigValue = user_cfg.value(strConfigKey);
108 qDebug() << "p5=*********"<<strConfigValue;
109
110 strConfigKey = "p6";
111 strConfigValue = user_cfg.value(strConfigKey);
112 qDebug() << "p6=*********"<<strConfigValue;
113
114 user_cfg.endGroup();
115
116 strConfigGroup = tr("j");
117 user_cfg.beginGroup(strConfigGroup);
118
119 strConfigKey = "j1";
120 strConfigValue = user_cfg.value(strConfigKey);
121 qDebug() << "j1=*********"<<strConfigValue;
122
123 strConfigKey = "j2";
124 strConfigValue = user_cfg.value(strConfigKey);
125 qDebug() << "j2=*********"<<strConfigValue;
126
127 strConfigKey = "j3";
128 strConfigValue = user_cfg.value(strConfigKey);
129 qDebug() << "j3=*********"<<strConfigValue;
130
131 strConfigKey = "j4";
132 strConfigValue = user_cfg.value(strConfigKey);
133 qDebug() << "j4=*********"<<strConfigValue;
134
135 strConfigKey = "j5";
136 strConfigValue = user_cfg.value(strConfigKey);
137 qDebug() << "j5=*********"<<strConfigValue;
138
139 strConfigKey = "j6";
140 strConfigValue = user_cfg.value(strConfigKey);
141 qDebug() << "j6=*********"<<strConfigValue;
142
143 user_cfg.endGroup();
144
145
146
147 }
ini文件
config.ini
1 [mountinfo] 2 mount=6 3 4 [v] 5 v1=14.2 6 v2=14.3 7 v3=14.4 8 v4=14.5 9 v5=14.6 10 v6=14.8 11 12 [a] 13 a1=2 14 a2=2.1 15 a3=2.2 16 a4=2.3 17 a5=2.4 18 a6=2.5 19 20 [p] 21 p1=126 22 p2=138 23 p3=139 24 p4=140 25 p5=141 26 p6=142 27 28 [j] 29 j1=4.8 30 j2=4.9 31 j3=4.7 32 j4=4.6 33 j5=4.5 34 j6=4.4
以上代码通过编译测试。
1， ini文件在windows系统中可以存储需要持久保存的配置信息，注册表信息等；文件格式由键 值组成，键值由section分成不同的段，如下图，[GPS]为section name，gpsBaud为键，4800为值。Qt 的QSettings类可很容易实现ini文件的读写
2，新建QtWidget工程
3，INI写（需包含QSettings）
void MainWindow::on_writepushButton_clicked() { QSettings settings("TestSetting.ini", QSettings::IniFormat); // 当前目录的INI文件 //GPS setting settings.beginGroup("GPS"); settings.setValue("gpsBaud", 4800); settings.setValue("gpsPort", "com7"); settings.setValue("gpsType", "uBlox"); settings.endGroup(); }
单击writeIni按钮，在当前目录中生成TestSetting.ini文件
TestSetting.ini文件内容如下：
4，INI读
void MainWindow::on_readpushButton_clicked() { QSettings settings("TestSetting.ini", QSettings::IniFormat); if(settings.contains("GPS/gpsBaud")) { QString gpsBaud = settings.value("GPS/gpsBaud").toString(); ui->gpsBaudlineEdit->clear(); ui->gpsBaudlineEdit->insert(gpsBaud); QString gpsPort = settings.value("GPS/gpsPort").toString(); ui->gpsPortlineEdit->clear(); ui->gpsPortlineEdit->insert(gpsPort); QString gpsType = settings.value("GPS/gpsType").toString(); ui->gpsTypelineEdit->clear(); ui->gpsTypelineEdit->insert(gpsType); } }
5，结果如下：
分类: Qt