1、模板类queue，包含头文件<queue>中，是一个FIFO队列。
queue.push():在队列尾巴增加数据 queue.pop():移除队列头部数据 queue.font():获取队列头部数据的引用...
2、Qt库的线程池，QThreadPool
QThreadPool.setMaxThreadCount():设置线程池最大线程数 QThreadPool.start(new QRunnable(..)):开启线程池调用QRunnable
3、QRunnable执行任务
void run();//重写虚函数，在里面消费任务队列 setAutoDelete(true)//默认就是true，消费结束自动回收内存
4、代码
run.h
#ifndef RUN_H #define RUN_H #include <QObject> #include <QRunnable> #include <string> #include <iostream> struct MyString { std::string valueStr; }; class Run : public QObject , public QRunnable { Q_OBJECT public: Run() = default; Run(const MyString& myString); protected: ~Run() = default; void run(); signals: public slots: private: MyString myString; }; #endif // RUN_H说明：MyString结构体代替实际项目中的任务，Run接口的run纯虚函数用来消费分配来的MyString run.cpp
#include "run.h" #include <QThread> #include <QDebug> Run::Run(const MyString &myString) { this->myString = myString; //this->setAutoDelete(true);//默认就是true } void Run::run() { //std::cout << "value:" << this->myString.valueStr <<";调用线程ID为：" << QThread::currentThread() << std::endl; qDebug() << "value:" << QString::fromStdString(myString.valueStr) << "thread:" << QThread::currentThreadId(); QThread::msleep(100); }说明：不使用cout打印是因为，cout打印不是原子操作，可能多个字符串被杂糅在一起打印；qDebug不会，应该底层加了锁 main.cpp
#include <QCoreApplication> #include "run.h" #include <queue> #include <mutex> #include <QThreadPool> #include <thread> using namespace std; queue<MyString> myList; mutex myMutex; volatile bool addThreadIsEnd = false; void makeListThread(); int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); cout << "begin main" << endl; thread addThread(makeListThread); addThread.detach(); cout << "begin addThread" << endl; QThreadPool tp; tp.setMaxThreadCount(20); cout << "begin threadPool" << endl; while(true) { if(!myList.empty()) { MyString tempMyString = myList.front(); tp.start(new Run(tempMyString)); myMutex.lock(); myList.pop(); myMutex.unlock(); } else { if(addThreadIsEnd) { break; } else { QThread::msleep(10); } } } cout << "end main,list size:" << myList.size() << endl; return a.exec(); } void makeListThread() { string a; MyString tempMyString; for(int i=0;i<10000;i++) { QThread::msleep(0); a = to_string(i); tempMyString.valueStr = a; myMutex.lock(); myList.push(tempMyString); myMutex.unlock(); } addThreadIsEnd = true; cout << "end addThread" << endl; } 5、模型