QT中调用外部程序_QProcess的使用.doc

QT中调用外部程序：QProcess的使用 本文通过QProcess，实现了在Qt中调用外部程序（控制台程序），并将输出重定向到了一个QTextEdit里。效果如下图所示：运行界面如下：程序共包含以下有一个文件：view plaincopy to clipboardprint?/: main.cpp #include process.h #include #include int main(int argc, char *argv) QApplication a(argc, argv); QTextCodec:setCodecForTr(QTextCodec:codecForLocale(); QTextCodec:setCodecForCStrings(QTextCodec:codecForLocale(); Process w; w.show(); return a.exec(); /: main.cpp#include process.h#include #include int main(int argc, char *argv) QApplication a(argc, argv); QTextCodec:setCodecForTr(QTextCodec:codecForLocale(); QTextCodec:setCodecForCStrings(QTextCodec:codecForLocale(); Process w; w.show(); return a.exec(); view plaincopy to clipboardprint?/: process.h #ifndef PROCESS_H #define PROCESS_H #include class QLabel; class QLineEdit; class QProcess; class QPushButton; class QTextEdit; class Process : public QWidget Q_OBJECT public: Process(QWidget *parent = 0, Qt:WFlags flags = 0); Process(); private slots: void runClicked(); void readOutput(); private: QProcess* cmd; QString output; QLabel* inputLabel; QLineEdit* inputEdit; QPushButton* runButton; QLabel* outputLabel; QTextEdit* outputEdit; ; #endif / PROCESS_H /: process.h#ifndef PROCESS_H#define PROCESS_H#include class QLabel;class QLineEdit;class QProcess;class QPushButton;class QTextEdit;class Process : public QWidget Q_OBJECTpublic: Process(QWidget *parent = 0, Qt:WFlags flags = 0); Process();private slots: void runClicked(); void readOutput();private: QProcess* cmd; QString output; QLabel* inputLabel; QLineEdit* inputEdit; QPushButton* runButton; QLabel* outputLabel; QTextEdit* outputEdit;#endif / PROCESS_H view plaincopy to clipboardprint?/: process.cpp #include #include process.h Process:Process(QWidget *parent, Qt:WFlags flags) : QWidget(parent, flags) inputLabel = new QLabel(tr(请输入命令：); inputEdit = new QLineEdit; runButton = new QPushButton(tr(运行); outputLabel = new QLabel(tr(运行结果如下：); outputEdit = new QTextEdit; outputEdit-setReadOnly(true); QHBoxLayout* hlayout = new QHBoxLayout; hlayout-addWidget(inputEdit); hlayout-addWidget(runButton); QVBoxLayout* layout = new QVBoxLayout; layout-addWidget(inputLabel); layout-addLayout(hlayout); layout-addWidget(outputLabel); layout-addWidget(outputEdit); setLayout(layout); cmd = new QProcess; connect(inputEdit, SIGNAL(returnPressed(), this, SLOT(runClicked(); connect(runButton, SIGNAL(clicked(bool), this, SLOT(runClicked(); connect(cmd, SIGNAL(readyRead(), this, SLOT(readOutput(); resize(500, 300); Process:Process() void Process:runClicked() QString input = inputEdit-text(); cmd-start(input); output = tr(); outputEdit-setText(output); void Process:readOutput() output += cmd-readAll(); outputEdit-setText(output); /: process.cpp#include #include process.hProcess:Process(QWidget *parent, Qt:WFlags flags) : QWidget(parent, flags) inputLabel = new QLabel(tr(请输入命令：); inputEdit = new QLineEdit; runButton = new QPushButton(tr(运行); outputLabel = new QLabel(tr(运行结果如下：); outputEdit = new QTextEdit; outputEdit-setReadOnly(true); QHBoxLayout* hlayout = new QHBoxLayout; hlayout-addWidget(inputEdit); hlayout-addWidget(runButton); QVBoxLayout* layout = new QVBoxLayout; layout-addWidget(inputLabel); layout-addLayout(hlayout); layout-addWidget(outputLabel); layout-addWidget(outputEdit); setLayout(layout); cmd = new QProcess; connect(inputEdit, SIGNAL(returnPressed(), this, SLOT(runClicked(); connect(runButton, SIGNAL(clicked(bool), this, SLOT(runClicked(); connect(cmd, SIGNAL(readyRead(), this, SLOT(readOutput(); resize(500, 300);Process:Process()void Process:runClicked() QString input = inputEdit-text(); cmd-start(input); output = tr