Qt实现的gbk/utf8无bom文本转码小工具

1、用到了QDir QDirIterator递归文件目录

2、QTextStream以某种编码格式读取文本保存到QString，然后以另一种编码格式保存文本

3、界面很简单，如下：

#include "widget.h"#include "ui_widget.h"#include <QFile>#include <QFileInfo>#include <QTextCodec>#include <QTextStream>#include <QDir>#include <QDirIterator>#include <QFileDialog>Widget::Widget(QWidget *parent) :QWidget(parent),    ui(new Ui::Widget){    ui->setupUi(this);    // 添加编码    QStringList items;    items << "UTF-8"<<"GBK";    ui->comboBoxCodecSource->clear();    ui->comboBoxCodecDest->clear();    ui->comboBoxCodecSource->addItems(items);    ui->comboBoxCodecSource->setCurrentText("GBK");    ui->comboBoxCodecDest->addItems(items);    ui->comboBoxCodecDest->setCurrentText("UTF-8");    m_strTrPath = "";//目录路径}Widget::~Widget(){    delete ui;}void Widget::on_btnPRoject_clicked(){    static QString strDir = "d:/";//初始目录    strDir = QFileDialog::getExistingDirectory(this, tr("选择目录"),                                               strDir,                                               QFileDialog::ShowDirsOnly |                                               QFileDialog::DontResolveSymlinks);    // 选择工程目录    if (!strDir.isEmpty())    {        m_strTrPath = strDir;        ui->labelStatus->setText(QString("选择目录[%1]").arg(strDir));    }    else        strDir = "d:/";}void Widget::on_btnChange_clicked()//点击开始转换按钮{    QDir dir (m_strTrPath);    QDirIterator dirIterator(m_strTrPath,                             QDir::AllDirs | QDir::NoSymLinks | QDir::NoDotAndDotDot,                             QDirIterator::Subdirectories);    ui->textBrowser->clear();   do  {        QStringList filters;        filters << "*.pro" << "*.cpp" << "*.h";        dir.setPath(m_strTrPath);        ui->textBrowser->append(QString("<span style=/" color:#FF0000;/">进入目录:</span> [ %1 ] <br>").arg(m_strTrPath));        // 转换文件        foreach (QFileInfo fileInfo, dir.entryInfoList(filters))            changeTextcodec(fileInfo.absoluteFilePath()); // 转换编码    } while (dirIterator.hasNext()&&(m_strTrPath = dirIterator.next())!="");}void Widget::changeTextcodec(QString fileName)//改变文本编码的关键代码，fileName是带路径的文件名{    QFile fileRead(fileName);    fileRead.open(QIODevice::ReadOnly);    QTextStream out(&fileRead);    //这一句需要知道文本当前的编码格式    out.setCodec(QTextCodec::codecForName(ui->comboBoxCodecSource->currentText().toLatin1()));    out.setAutoDetectUnicode(true);    QString strTemp;    QStringList strContents;    while (!out.atEnd()) {        strTemp = out.readLine();        strContents << strTemp;    }    fileRead.close();    QFile fielWrite(fileName);    if (!fielWrite.open(QIODevice::ReadWrite | QIODevice::Text | QIODevice::Truncate)) {        ui->labelStatus->setText("文件打开失败!");        return;    }    QTextStream in(&fielWrite);    in.setCodec(QTextCodec::codecForName(ui->comboBoxCodecDest->currentText().toLatin1()));    in.setAutoDetectUnicode(true);    for (int i = 0; i < strContents.size(); i++)        in << strContents.at(i) << endl;    fielWrite.close();    ui->textBrowser->append(QString("<span style=/" color:#0000FF;/">转换完成:</span> [ %1 ] <br>").arg(fileName));}代码下载地址：http://download.csdn.net/detail/bladeandmaster88/9747442