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重写base64编码转换demo

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feiyangqingyun
2021-07-31 15:03:14 +08:00
parent 45d9850b08
commit 9f950985c3
7 changed files with 130 additions and 61 deletions
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41
base64/base64.cpp Normal file
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@@ -0,0 +1,41 @@
#include "base64.h"
#include "qbuffer.h"
#include "qdebug.h"
QString Base64::imageToBase64(const QImage &image)
{
return QString(imageToBase64x(image));
}
QByteArray Base64::imageToBase64x(const QImage &image)
{
//这个转换可能比较耗时建议在线程中执行
QByteArray data;
QBuffer buffer(&data);
image.save(&buffer, "JPG");
data = data.toBase64();
return data;
}
QImage Base64::base64ToImage(const QString &data)
{
return base64ToImagex(data.toUtf8());
}
QImage Base64::base64ToImagex(const QByteArray &data)
{
//这个转换可能比较耗时建议在线程中执行
QImage image;
image.loadFromData(QByteArray::fromBase64(data));
return image;
}
QString Base64::textToBase64(const QString &text)
{
return QString(text.toLocal8Bit().toBase64());
}
QString Base64::base64ToText(const QString &text)
{
return QString(QByteArray::fromBase64(text.toLocal8Bit()));
}

37
base64/base64.h Normal file
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@@ -0,0 +1,37 @@
#ifndef BASE64_H
#define BASE64_H
/**
* base64编码转换类 作者:feiyangqingyun(QQ:517216493) 2016-12-16
* 1. 图片转base64字符串
* 2. base64字符串转图片
* 3. 字符转base64字符串
* 4. base64字符串转字符
* 5. 后期增加数据压缩
* 6. Qt6对base64编码转换进行了重写效率提升至少200%
*/
#include <QImage>
#ifdef quc
class Q_DECL_EXPORT Base64
#else
class Base64
#endif
{
public:
//图片转base64字符串
static QString imageToBase64(const QImage &image);
static QByteArray imageToBase64x(const QImage &image);
//base64字符串转图片
static QImage base64ToImage(const QString &data);
static QImage base64ToImagex(const QByteArray &data);
//字符串与base64互转
static QString textToBase64(const QString &text);
static QString base64ToText(const QString &text);
};
#endif // BASE64_H

5
base64/base64.pro
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@@ -8,7 +8,12 @@ DESTDIR = $$PWD/../bin
CONFIG += warn_off
SOURCES += main.cpp
SOURCES += frmbase64.cpp
SOURCES += base64.cpp
HEADERS += frmbase64.h
HEADERS += base64.h
FORMS += frmbase64.ui

70
base64/frmbase64.cpp
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@@ -2,8 +2,9 @@
#include "frmbase64.h"
#include "ui_frmbase64.h"
#include "base64.h"
#include "qfiledialog.h"
#include "qbuffer.h"
#include "qelapsedtimer.h"
#include "qdebug.h"
frmBase64::frmBase64(QWidget *parent) : QWidget(parent), ui(new Ui::frmBase64)
@@ -16,39 +17,6 @@ frmBase64::~frmBase64()
delete ui;
}
QString frmBase64::getImageData(const QImage &image)
{
return QString(getImageData2(image));
}
QByteArray frmBase64::getImageData2(const QImage &image)
{
QByteArray imageData;
QBuffer buffer(&imageData);
image.save(&buffer, "JPG");
imageData = imageData.toBase64();
return imageData;
}
QImage frmBase64::getImage(const QString &data)
{
QByteArray imageData = QByteArray::fromBase64(data.toLatin1());
QImage image;
image.loadFromData(imageData);
return image;
}
QString frmBase64::getBase64(const QString &data)
{
return QString(data.toLocal8Bit().toBase64());
}
QString frmBase64::getData(const QString &base64)
{
QByteArray data = QByteArray::fromBase64(base64.toLocal8Bit());
return QString(data);
}
void frmBase64::on_btnOpen_clicked()
{
QString fileName = QFileDialog::getOpenFileName(this, "选择文件", "", "图片(*.png *.bmp *.jpg)");
@@ -70,27 +38,53 @@ void frmBase64::on_btnClear_clicked()
void frmBase64::on_btnImageToBase64_clicked()
{
//计时
QElapsedTimer time;
time.start();
QString fileName = ui->txtFile->text().trimmed();
if (!fileName.isEmpty()) {
ui->txtBase64->setText(getImageData(QImage(fileName)));
ui->txtBase64->setText(Base64::imageToBase64(QImage(fileName)));
}
//统计用时
#if (QT_VERSION >= QT_VERSION_CHECK(4,8,0))
double elapsed = (double)time.nsecsElapsed() / 1000000;
#else
double elapsed = (double)time.elapsed();
#endif
QString strTime = QString::number(elapsed, 'f', 3);
qDebug() << QString("用时 %1 毫秒").arg(strTime);
}
void frmBase64::on_btnBase64ToImage_clicked()
{
//计时
QElapsedTimer time;
time.start();
QString text = ui->txtBase64->toPlainText().trimmed();
if (!text.isEmpty()) {
QPixmap pix = QPixmap::fromImage(getImage(text));
QPixmap pix = QPixmap::fromImage(Base64::base64ToImage(text));
pix = pix.scaled(ui->labImage->size() - QSize(4, 4), Qt::KeepAspectRatio);
ui->labImage->setPixmap(pix);
}
//统计用时
#if (QT_VERSION >= QT_VERSION_CHECK(4,8,0))
double elapsed = (double)time.nsecsElapsed() / 1000000;
#else
double elapsed = (double)time.elapsed();
#endif
QString strTime = QString::number(elapsed, 'f', 3);
qDebug() << QString("用时 %1 毫秒").arg(strTime);
}
void frmBase64::on_btnTextToBase64_clicked()
{
QString text = ui->txtText->text().trimmed();
if (!text.isEmpty()) {
ui->txtBase64->setText(getBase64(text));
ui->txtBase64->setText(Base64::textToBase64(text));
}
}
@@ -98,6 +92,6 @@ void frmBase64::on_btnBase64ToText_clicked()
{
QString text = ui->txtBase64->toPlainText().trimmed();
if (!text.isEmpty()) {
ui->txtText->setText(getData(text));
ui->txtText->setText(Base64::base64ToText(text));
}
}

12
base64/frmbase64.h
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@@ -18,18 +18,6 @@ public:
private:
Ui::frmBase64 *ui;
private slots:
//图片转base64编码
QString getImageData(const QImage &image);
QByteArray getImageData2(const QImage &image);
//base64编码数据转图片
QImage getImage(const QString &data);
//汉字转base64编码
QString getBase64(const QString &data);
//base64编码转汉字
QString getData(const QString &base64);
private slots:
void on_btnOpen_clicked();
void on_btnClear_clicked();

24
base64/frmbase64.ui
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@@ -6,8 +6,8 @@
<rect>
<x>0</x>
<y>0</y>
<width>644</width>
<height>530</height>
<width>800</width>
<height>600</height>
</rect>
</property>
<property name="windowTitle">
@@ -15,13 +15,17 @@
</property>
<layout class="QGridLayout" name="gridLayout">
<item row="0" column="0">
<widget class="QLineEdit" name="txtFile"/>
<widget class="QLineEdit" name="txtFile">
<property name="text">
<string>E:/myFile/美女图片/2.jpg</string>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QPushButton" name="btnOpen">
<property name="minimumSize">
<size>
<width>100</width>
<width>110</width>
<height>0</height>
</size>
</property>
@@ -34,7 +38,7 @@
<widget class="QPushButton" name="btnImageToBase64">
<property name="minimumSize">
<size>
<width>100</width>
<width>110</width>
<height>0</height>
</size>
</property>
@@ -47,7 +51,7 @@
<widget class="QPushButton" name="btnBase64ToImage">
<property name="minimumSize">
<size>
<width>100</width>
<width>110</width>
<height>0</height>
</size>
</property>
@@ -59,7 +63,7 @@
<item row="1" column="0">
<widget class="QLineEdit" name="txtText">
<property name="text">
<string>feiyangqingyun QQ: 517216493</string>
<string>游龙 feiyangqingyun QQ: 517216493</string>
</property>
</widget>
</item>
@@ -67,7 +71,7 @@
<widget class="QPushButton" name="btnClear">
<property name="minimumSize">
<size>
<width>100</width>
<width>110</width>
<height>0</height>
</size>
</property>
@@ -80,7 +84,7 @@
<widget class="QPushButton" name="btnTextToBase64">
<property name="minimumSize">
<size>
<width>100</width>
<width>110</width>
<height>0</height>
</size>
</property>
@@ -93,7 +97,7 @@
<widget class="QPushButton" name="btnBase64ToText">
<property name="minimumSize">
<size>
<width>100</width>
<width>110</width>
<height>0</height>
</size>
</property>

2
base64/main.cpp
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@@ -9,7 +9,7 @@ int main(int argc, char *argv[])
QApplication a(argc, argv);
a.setFont(QFont("Microsoft Yahei", 9));
#if (QT_VERSION <= QT_VERSION_CHECK(5,0,0))
#if (QT_VERSION < QT_VERSION_CHECK(5,0,0))
#if _MSC_VER
QTextCodec *codec = QTextCodec::codecForName("gbk");
#else