相关资料：
实例代码：
.pro
1 QT += core gui
2
3 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
4
5 CONFIG += c++11
6
7 # The following define makes your compiler emit warnings if you use
8 # any Qt feature that has been marked deprecated (the exact warnings
9 # depend on your compiler). Please consult the documentation of the
10 # deprecated API in order to know how to port your code away from it.
11 DEFINES += QT_DEPRECATED_WARNINGS
12
13 # You can also make your code fail to compile if it uses deprecated APIs.
14 # In order to do so, uncomment the following line.
15 # You can also select to disable deprecated APIs only up to a certain version of Qt.
16 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
17
18 SOURCES += \
19 main.cpp \
20 mainwindow.cpp
21
22 HEADERS += \
23 mainwindow.h
24
25 FORMS += \
26 mainwindow.ui
27
28 # Default rules for deployment.
29 qnx: target.path = /tmp/$${TARGET}/bin
30 else: unix:!android: target.path = /opt/$${TARGET}/bin
31 !isEmpty(target.path): INSTALLS += target
View Code
main.cpp
1 #include "mainwindow.h"
2
3 #include <QApplication>
4
5 int main(int argc, char *argv[])
6 {
7 QApplication a(argc, argv);
8 MainWindow w;
9 w.show();
10 return a.exec();
11 }
View Code
mainwindow.h
1 #ifndef MAINWINDOW_H
2 #define MAINWINDOW_H
3
4 #include <QMainWindow>
5
6 QT_BEGIN_NAMESPACE
7 namespace Ui { class MainWindow; }
8 QT_END_NAMESPACE
9
10 class MainWindow : public QMainWindow
11 {
12 Q_OBJECT
13
14 public:
15 MainWindow(QWidget *parent = nullptr);
16 ~MainWindow();
17
18 private slots:
19 void on_pushButton_clicked();
20
21 private:
22 Ui::MainWindow *ui;
23 };
24 #endif // MAINWINDOW_H
View Code
mainwindow.cpp
1 #include "mainwindow.h"
2 #include "ui_mainwindow.h"
3 #include <QDebug>
4 #include <QTextDocument>
5 #include <QTextBlock>
6
7 MainWindow::MainWindow(QWidget *parent)
8 : QMainWindow(parent)
9 , ui(new Ui::MainWindow)
10 {
11 ui->setupUi(this);
12
13 setWindowTitle(QStringLiteral("Qt使用QRegExp实现正则表达式处理"));
14
15 //
16 ui->textEdit->setText("GUID=100\n"
17 "AAA=98\n"
18 "tttt=99\n"
19 "iiii=88\n"
20 "sdfsdf=9888\n");
21 ui->textEdit_2->setText(".*=.*");
22 }
23
24 MainWindow::~MainWindow()
25 {
26 delete ui;
27 }
28
29
30 void MainWindow::on_pushButton_clicked()
31 {
32 QRegExp rx(ui->textEdit_2->toPlainText());
33
34 QTextDocument* doc = ui->textEdit->document () ; //文本对象
35 int cnt=doc->blockCount () ;//回车符是一个 block
36
37 ui->textEdit_3->clear();
38 for (int i=0; i<cnt; i++)
39 {
40 QTextBlock textLine = doc->findBlockByNumber(i) ; // 文本中的一段
41 QString str = textLine.text();
42 bool match = rx.exactMatch(str);
43 if (match)
44 ui->textEdit_3->append(str);
45 }
46 }
View Code
mainwindow.ui
1 <?xml version="1.0" encoding="UTF-8"?>
2 <ui version="4.0">
3 <class>MainWindow</class>
4 <widget class="QMainWindow" name="MainWindow">
5 <property name="geometry">
6 <rect>
7 <x>0</x>
8 <y>0</y>
9 <width>629</width>
10 <height>488</height>
11 </rect>
12 </property>
13 <property name="windowTitle">
14 <string>MainWindow</string>
15 </property>
16 <widget class="QWidget" name="centralwidget">
17 <widget class="QPushButton" name="pushButton">
18 <property name="geometry">
19 <rect>
20 <x>510</x>
21 <y>260</y>
22 <width>81</width>
23 <height>71</height>
24 </rect>
25 </property>
26 <property name="text">
27 <string>PushButton</string>
28 </property>
29 </widget>
30 <widget class="QLabel" name="label">
31 <property name="geometry">
32 <rect>
33 <x>10</x>
34 <y>0</y>
35 <width>54</width>
36 <height>12</height>
37 </rect>
38 </property>
39 <property name="text">
40 <string>原始数据：</string>
41 </property>
42 </widget>
43 <widget class="QLabel" name="label_2">
44 <property name="geometry">
45 <rect>
46 <x>10</x>
47 <y>240</y>
48 <width>81</width>
49 <height>16</height>
50 </rect>
51 </property>
52 <property name="text">
53 <string>正则表达式：</string>
54 </property>
55 </widget>
56 <widget class="QTextEdit" name="textEdit">
57 <property name="geometry">
58 <rect>
59 <x>10</x>
60 <y>20</y>
61 <width>481</width>
62 <height>211</height>
63 </rect>
64 </property>
65 <property name="readOnly">
66 <bool>false</bool>
67 </property>
68 <property name="placeholderText">
69 <string/>
70 </property>
71 </widget>
72 <widget class="QTextEdit" name="textEdit_2">
73 <property name="geometry">
74 <rect>
75 <x>10</x>
76 <y>260</y>
77 <width>481</width>
78 <height>81</height>
79 </rect>
80 </property>
81 </widget>
82 <widget class="QLabel" name="label_3">
83 <property name="geometry">
84 <rect>
85 <x>10</x>
86 <y>340</y>
87 <width>54</width>
88 <height>12</height>
89 </rect>
90 </property>
91 <property name="text">
92 <string>结果：</string>
93 </property>
94 </widget>
95 <widget class="QTextEdit" name="textEdit_3">
96 <property name="geometry">
97 <rect>
98 <x>10</x>
99 <y>360</y>
100 <width>481</width>
101 <height>111</height>
102 </rect>
103 </property>
104 </widget>
105 </widget>
106 </widget>
107 <resources/>
108 <connections/>
109 </ui>
View Code
