qt中如何显示图片

qt中如何显示图片，下面的代码可供参考

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QImage>
#include <QPixmap>
#include <QLabel>
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_clicked()
{
    //显示图片
    QImage *image=new QImage("E:/Qt_Program/Chrysanthemum.jpg");

    QLabel *label=new QLabel(this);
    label->setGeometry(0,0,500,500);
    label->setPixmap(QPixmap::fromImage(*image));
    //label->setPixmap(QPixmap("E:/Qt_Program/Chrysanthemum.jpg"));
    label->show();
}