基于QTreeWidget实现带Checkbox的多级组织结构选择树

2023-12-16 19:45
文章标签 实现 选择 结构 组织 多级 checkbox qtreewidget

本文主要是介绍基于QTreeWidget实现带Checkbox的多级组织结构选择树，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

基于QTreeWidget实现带Checkbox的多级组织结构选择树

采用基于QWidget+Mingw实现的原生的组织结构树
通过QTreeWidget控件实现的带Checkbox多级组织结构树。

Qt相关系列文章：
一、Qt实现的聊天画面消息气泡
二、基于QTreeWidget实现多级组织结构
三、基于QTreeWidget实现带Checkbox的多级组织结构选择树

基于QTreeWidget实现带Checkbox的多级组织结构选择树代码已上传到【https://gitee.com/duyanjun/QT_tree_checkDemo.git】

目录

  • 基于QTreeWidget实现带Checkbox的多级组织结构选择树
  • 1、效果图
  • 2、运行
    • 2.1、从git导入
    • 2.2、修改头像图片的路径
    • 2.3、运行
    • 2.4、实现

1、效果图

1、支持带复选框多级部门、人员，复选框未选中、选中、半选中状态以及样式自定义，本例中样式中圆形框；
2、每一子级相对上级部门有缩进；
3、支持点击上级部门复选框，关联的下级部门、人员节点也会自动选中/非选中；
4、如果上级部门节点处于选中状态时，取消选中其中部分下级子节点时，上级部门节点的选中状态会自动变更为半选中状态；

在这里插入图片描述在这里插入图片描述在这里插入图片描述在这里插入图片描述在这里插入图片描述在这里插入图片描述

2、运行

2.1、从git导入

文件 -> 新建文件或项目 -> Import Project -> Git Clone
【https://gitee.com/duyanjun/QT_tree_checkDemo.git】

在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述

2.2、修改头像图片的路径

运行本Demo需要修改mainwindow.cpp第228行代码中的images目录的绝对路径；

在这里插入图片描述

2.3、运行

在这里插入图片描述

2.4、实现

1）、主画面部局

在画面添加QTreeWidget控件

在这里插入图片描述
2）、人员节点部局

整体部局采用横向部局，依次是头像和姓名

在这里插入图片描述
3）、main.cpp

#include "mainwindow.h"
#include <QApplication>int main(int argc, char *argv[])
{QApplication a(argc, argv);MainWindow w;w.show();return a.exec();
}

4）、MainWindow类

使QTreeWidget显示复选框主要是下面代码起的作用

QTreeWidgetItem *pRootDeptItem = new QTreeWidgetItem();
pRootDeptItem->setChildIndicatorPolicy(QTreeWidgetItem::ShowIndicator);
//设置Data用于区分，Item是分组节点还是子节点，0代表分组节点，1代表子节点
pRootDeptItem->setData(0, Qt::UserRole, 0);
pRootDeptItem->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);
pRootDeptItem->setCheckState(1, Qt::Unchecked);

resources.qrc
在这里插入图片描述

MainWindow.css

#tree{outline:0px;
}
#tree
{border-style:none;
}#tree::item
{color:rgba(255, 255, 255, 0);
}#tree::item:selected:active
{background-color: rgba(135, 206, 250, 153);
}#tree::item:selected:!active, QTreeView::item:hover
{background-color: rgba(135, 206, 250, 50);
}
#tree::indicator{width: 16px;height: 16px;
}
#tree::indicator:checked{image: url(:/tree/Resources/ckChecked_normal.png);
}
#tree::indicator:unchecked{image: url(:/tree/Resources/ckUncheck_normal.png);
}
#tree::indicator:indeterminate{image: url(:/tree/Resources/ckChecked_unable.png);
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include <QTreeWidgetItem>namespace Ui {
class MainWindow;
}class MainWindow : public QMainWindow
{Q_OBJECTpublic:MainWindow(QWidget *parent = 0);~MainWindow();void init();void updateParentItem(QTreeWidgetItem* item);void setParentPartiallyChecked(QTreeWidgetItem *itm);QTreeWidgetItem* addChildNode(QTreeWidgetItem *parent, int index, QString namePre);QTreeWidgetItem* addChildEmpNode(QTreeWidgetItem *parent, int index);public slots://申明信号与槽,当树形控件的子选项被改变时执行void treeItemChanged(QTreeWidgetItem* item , int column);void onItemExpanded(QTreeWidgetItem * item);void onItemCollapsed(QTreeWidgetItem * item);void onItemClicked(QTreeWidgetItem * item, int column);private:void loadStyleSheet();
private:Ui::MainWindow *ui;
};#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "DepartNodeItem.h"
#include "EmployeeNodeItem.h"#include <QFile>
#include <QDebug>MainWindow::MainWindow(QWidget *parent) :QMainWindow(parent),ui(new Ui::MainWindow)
{ui->setupUi(this);loadStyleSheet();init();connect(ui->tree, SIGNAL(itemChanged(QTreeWidgetItem*,int)), this, SLOT(treeItemChanged(QTreeWidgetItem*,int)));
}MainWindow::~MainWindow()
{delete ui;
}void MainWindow::init()
{ui->tree->setHeaderHidden(true);// 1.创建表格ui->tree->setColumnCount(2);// 2.拿到表头QHeaderView *head = ui->tree->header();// 3.设置不能拉伸的列的宽度，设置哪一列能拉伸head->setSectionResizeMode(0,QHeaderView::Stretch);head->setSectionResizeMode(1, QHeaderView::Fixed);ui->tree->setColumnWidth(1, 30);// 4.（最重要的一步）去掉默认的拉伸最后列属性head->setStretchLastSection(false);//展开和收缩时信号，以达到变更我三角图片；connect(ui->tree, SIGNAL(itemClicked(QTreeWidgetItem *, int)), this, SLOT(onItemClicked(QTreeWidgetItem *, int)));connect(ui->tree, SIGNAL(itemExpanded(QTreeWidgetItem *)), this, SLOT(onItemExpanded(QTreeWidgetItem *)));connect(ui->tree, SIGNAL(itemCollapsed(QTreeWidgetItem *)), this, SLOT(onItemCollapsed(QTreeWidgetItem *)));for(int i = 0; i < 10; i++){// 一级部门节点QTreeWidgetItem *pRootDeptItem = new QTreeWidgetItem();pRootDeptItem->setChildIndicatorPolicy(QTreeWidgetItem::ShowIndicator);//设置Data用于区分，Item是分组节点还是子节点，0代表分组节点，1代表子节点pRootDeptItem->setData(0, Qt::UserRole, 0);pRootDeptItem->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);pRootDeptItem->setCheckState(1, Qt::Unchecked);DepartNodeItem *pItemName = new DepartNodeItem(ui->tree);pItemName->setLevel(0);int nMyFriendNum = 6;QString qsGroupName = QString("一级部门%3 [%1/%2]").arg(0).arg(nMyFriendNum).arg(i);pItemName->setText(qsGroupName);//插入分组节点ui->tree->addTopLevelItem(pRootDeptItem);ui->tree->setItemWidget(pRootDeptItem, 0, pItemName);for(int j = 0; j < 5; j++){//addChildEmpNode(pRootDeptItem, j);}for(int j = 0; j < 5; j++){QString name = QString("二级部门%1").arg(j);QTreeWidgetItem *childItem = addChildNode(pRootDeptItem, i * 10 + j,name);for(int g = 0; g < 5; g++){addChildEmpNode(childItem, g);}}}
}QTreeWidgetItem* MainWindow::addChildNode(QTreeWidgetItem *parent, int index, QString namePre)
{QTreeWidgetItem *pDeptItem = new QTreeWidgetItem();pDeptItem->setChildIndicatorPolicy(QTreeWidgetItem::ShowIndicator);//设置Data用于区分，Item是分组节点还是子节点，0代表分组节点，1代表子节点pDeptItem->setData(0, Qt::UserRole, 0);DepartNodeItem *pItemName = new DepartNodeItem(ui->tree);pDeptItem->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);pDeptItem->setCheckState(1, Qt::Unchecked);int level = 0;DepartNodeItem *departNode = dynamic_cast<DepartNodeItem*>(ui->tree->itemWidget(parent, 0));if (departNode) {level = departNode->getLevel();level ++;}pItemName->setLevel(level);int nMyFriendNum = 6;QString qsGroupName = QString("%4%3 [%1/%2]").arg(0).arg(nMyFriendNum).arg(index).arg(namePre);pItemName->setText(qsGroupName);//擦入分组节点parent->addChild(pDeptItem);ui->tree->setItemWidget(pDeptItem, 0, pItemName);return pDeptItem;
}void MainWindow::updateParentItem(QTreeWidgetItem *item)
{QTreeWidgetItem *parent = item->parent();if(parent == NULL){return ;}int selectedCount = 0;int childCount = parent->childCount();//判断有多少个子项被选中for(int i=0; i<childCount; i++) {QTreeWidgetItem* childItem = parent->child(i);if(childItem->checkState(1) == Qt::Checked) {selectedCount++;}}if(selectedCount <= 0)  //如果没有子项被选中，父项设置为未选中状态{parent->setCheckState(1,Qt::Unchecked);}else if(selectedCount>0 && selectedCount<childCount)    //如果有部分子项被选中，父项设置为部分选中状态，即用灰色显示{parent->setCheckState(1,Qt::PartiallyChecked);// 重点：针对半选中状态的设置需要单独调用setParentPartiallyChecked后返回，否则上级节点的状态及当前节点的下级第一个节点的状态会不正确setParentPartiallyChecked(parent);return;}else if(selectedCount == childCount)    //如果子项全部被选中，父项则设置为选中状态{parent->setCheckState(1,Qt::Checked);}updateParentItem(parent);
}void MainWindow::setParentPartiallyChecked(QTreeWidgetItem *itm)
{QTreeWidgetItem *parent = itm->parent();if(parent) {parent->setCheckState(1,Qt::PartiallyChecked);setParentPartiallyChecked(parent);}
}void MainWindow::treeItemChanged(QTreeWidgetItem *item, int column)
{if(Qt::Checked == item->checkState(1)){int count = item->childCount(); //返回子项的个数if(count >0) {for(int i=0; i<count; i++) {item->child(i)->setCheckState(1,Qt::Checked);}} else {updateParentItem(item);}} else if(Qt::Unchecked == item->checkState(1)) {int count = item->childCount();if(count > 0) {for(int i=0; i<count; i++) {item->child(i)->setCheckState(1,Qt::Unchecked);}} else {updateParentItem(item);}}
}
void MainWindow::onItemExpanded(QTreeWidgetItem * item)
{bool bIsChild = item->data(0, Qt::UserRole).toBool();if (!bIsChild) {DepartNodeItem *departNode = dynamic_cast<DepartNodeItem*>(ui->tree->itemWidget(item, 0));if (departNode) {departNode->setExpanded(true);}}}void MainWindow::onItemCollapsed(QTreeWidgetItem * item)
{bool bIsChild = item->data(0, Qt::UserRole).toBool();if (!bIsChild) {DepartNodeItem *departNode = dynamic_cast<DepartNodeItem*>(ui->tree->itemWidget(item, 0));if (departNode) {departNode->setExpanded(false);}}
}void MainWindow::onItemClicked(QTreeWidgetItem * item, int column)
{if (column == 0) {bool bIsChild = item->data(0, Qt::UserRole).toBool();if (!bIsChild){item->setExpanded(!item->isExpanded());}}
}void MainWindow::loadStyleSheet()
{QFile file(":/tree/Resources/QSS/MainWindow.css");file.open(QFile::ReadOnly);if (file.isOpen()){this->setStyleSheet("");QString qsstyleSheet = QString(file.readAll());this->setStyleSheet(qsstyleSheet);}file.close();
}QTreeWidgetItem *MainWindow::addChildEmpNode(QTreeWidgetItem *parent, int index)
{QTreeWidgetItem *pDeptItem = new QTreeWidgetItem();//设置Data用于区分，Item是分组节点还是子节点，0代表分组节点，1代表子节点pDeptItem->setData(0, Qt::UserRole, 1);pDeptItem->setFlags(Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable);pDeptItem->setCheckState(1, Qt::Unchecked);int level = 0;DepartNodeItem *departNode = dynamic_cast<DepartNodeItem*>(ui->tree->itemWidget(parent, 0));if (departNode) {level = departNode->getLevel();level ++;}EmployeeNodeItem *pItemName = new EmployeeNodeItem(ui->tree);pItemName->setLevel(level);// 加载本地文件，需要修改成本地的路径pItemName->setHeadPath(QString("D:/work/Qt/workspace/QT_tree_checkDemo/images/pic/%1.jpg").arg(index));QString qfullName = QString("人员%1").arg(index);pItemName->setFullName(qfullName);//擦入分组节点parent->addChild(pDeptItem);ui->tree->setItemWidget(pDeptItem, 0, pItemName);return pDeptItem;
}

5）、DepartNodeItem类
DepartNodeItem.h

#ifndef DEPARTNODEITEM_H
#define DEPARTNODEITEM_H#include <QLabel>
#include <QPaintEvent>
#include <QPropertyAnimation>#define INDENTATION 20class DepartNodeItem : public QLabel
{Q_OBJECTQ_PROPERTY(int rotation READ rotation WRITE setRotation)
public:DepartNodeItem(QWidget *parent = 0);~DepartNodeItem();void setText(const QString& title);void setExpanded(bool expand);int getIndentation();void setLevel(int level);int getLevel();QString getName();private:int rotation();void setRotation(int rotation);private:void paintEvent(QPaintEvent *event);private:QPropertyAnimation *m_animation;QString m_name;QString m_id;int m_rotation;int m_indentation;int m_level;
};#endif // DEPARTNODEITEM_H

DepartNodeItem.cpp

#include "DepartNodeItem.h"#include <QPainter>
#include <QDebug>DepartNodeItem::DepartNodeItem(QWidget *parent): QLabel(parent),m_rotation(0),m_level(0),m_indentation(0)
{setFixedHeight(32);setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);m_animation = new QPropertyAnimation(this, "rotation");m_animation->setDuration(50);m_animation->setEasingCurve(QEasingCurve::InQuad);
}
DepartNodeItem::~DepartNodeItem()
{m_animation = NULL;delete m_animation;
}void DepartNodeItem::setText(const QString &title)
{m_name = title;update();
}void DepartNodeItem::setExpanded(bool expand)
{if (expand) {m_animation->setEndValue(90);} else {m_animation->setEndValue(0);}m_animation->start();
}int DepartNodeItem::getIndentation()
{return this->m_indentation;
}void DepartNodeItem::setLevel(int level)
{this->m_level = level;this->m_indentation = this->m_level * INDENTATION;
}int DepartNodeItem::getLevel()
{return this->m_level;
}QString DepartNodeItem::getName()
{return this->m_name;
}int DepartNodeItem::rotation()
{return m_rotation;
}void DepartNodeItem::setRotation(int rotation)
{m_rotation = rotation;update();
}void DepartNodeItem::paintEvent(QPaintEvent *event)
{QPainter painter(this);{painter.setRenderHint(QPainter::TextAntialiasing, true);QFont font;font.setPointSize(10);painter.setFont(font);int txtX = m_indentation + 24;painter.drawText(txtX, 0, this->width() - txtX, this->height(), Qt::AlignLeft | Qt::AlignVCenter, m_name);}{painter.setRenderHint(QPainter::SmoothPixmapTransform, true);painter.save();QPixmap pixmap(":/tree/Resources/arrow.png");QPixmap tmpPixmap(pixmap.size());tmpPixmap.fill(Qt::transparent);QPainter p(&tmpPixmap);p.setRenderHint(QPainter::SmoothPixmapTransform, true);// 旋转m_rotation角度p.translate(pixmap.width() /2, pixmap.height() /2);p.rotate(m_rotation);p.drawPixmap(0 - pixmap.width() /2, 0 - pixmap.height() / 2,pixmap);painter.drawPixmap(m_indentation+6, (this->height() - pixmap.height()) / 2, tmpPixmap);painter.restore();}QLabel::paintEvent(event);
}

6）、EmployeeNodeItem类
EmployeeNodeItem.h

#ifndef EMPLOYEENODEITEM_H
#define EMPLOYEENODEITEM_H#include <QWidget>
#include <QPaintEvent>
#include <QPixmap>
#include <QSize>#define INDENTATION 20
#define HEAD_LABEL_WIDTH 32namespace Ui {
class EmployeeNodeItem;
}class EmployeeNodeItem : public QWidget
{Q_OBJECTpublic:EmployeeNodeItem(QWidget *parent = 0);~EmployeeNodeItem();public:void setFullName(const QString& fullName);void setHeadPixmap(const QPixmap& headPath);void setHeadPath(const QString& headPath);QSize getHeadLabelSize() const;int getIndentation();int getLevel();void setLevel(int level);QString getFullName();private:void initControl();QPixmap getRoundImage(const QPixmap &src, QPixmap& mask, QSize masksize);private:void paintEvent(QPaintEvent *event);
private:Ui::EmployeeNodeItem *ui;int m_indentation;int m_level;int m_headLabelWidth;QString m_fullName;
};#endif // EMPLOYEENODEITEM_H

EmployeeNodeItem.cpp

#include "EmployeeNodeItem.h"
#include "ui_EmployeeNodeItem.h"#include <QDebug>
#include <QPainter>EmployeeNodeItem::EmployeeNodeItem(QWidget *parent) :QWidget(parent),ui(new Ui::EmployeeNodeItem),m_headLabelWidth(0),m_level(0),m_indentation(0),m_fullName("")
{ui->setupUi(this);initControl();
}EmployeeNodeItem::~EmployeeNodeItem()
{delete ui;
}void EmployeeNodeItem::setFullName(const QString &fullName)
{m_fullName = fullName;ui->lbFullName->setText(fullName);
}void EmployeeNodeItem::setHeadPixmap(const QPixmap &headPath)
{ui->lbHeadPic->setPixmap(headPath);
}void EmployeeNodeItem::setHeadPath(const QString &headPath)
{/*ui->lbHeadPic->setScaledContents(true);QString style = ui->lbHeadPic->styleSheet();style.append("image:url(").append(headPath).append(");");qDebug() << style;ui->lbHeadPic->setStyleSheet(style);*/// 方式3.加载QPixmapQPixmap pixmap1;pixmap1.load(headPath);QPixmap pixmap2;pixmap2.load(":/tree/Resources//head_mask.png");//qDebug() << "m_level:" << m_level << "  m_indentation:" << m_indentation << " m_headLabelWidth:" << m_headLabelWidth << "  " << HEAD_LABEL_WIDTH;QPixmap roundPic = this->getRoundImage(pixmap1, pixmap2, QSize(m_headLabelWidth,HEAD_LABEL_WIDTH));this->setHeadPixmap(roundPic);
}QSize EmployeeNodeItem::getHeadLabelSize() const
{return ui->lbHeadPic->size();
}int EmployeeNodeItem::getIndentation()
{return this->m_indentation;}int EmployeeNodeItem::getLevel()
{return this->m_level;
}void EmployeeNodeItem::setLevel(int level)
{this->m_level = level;this->m_indentation = this->m_level * INDENTATION;this->m_headLabelWidth = this->m_indentation + HEAD_LABEL_WIDTH;ui->lbHeadPic->setMinimumWidth(m_indentation);
}QString EmployeeNodeItem::getFullName()
{return m_fullName;
}void EmployeeNodeItem::initControl()
{}QPixmap EmployeeNodeItem::getRoundImage(const QPixmap &src, QPixmap &mask, QSize masksize)
{if (masksize == QSize(0, 0)){masksize = mask.size();}else{mask = mask.scaled(masksize, Qt::KeepAspectRatio, Qt::SmoothTransformation);}QImage resultImage(masksize, QImage::Format_ARGB32_Premultiplied);QPainter painter(&resultImage);painter.setCompositionMode(QPainter::CompositionMode_Source);painter.fillRect(resultImage.rect(), Qt::transparent);painter.setCompositionMode(QPainter::CompositionMode_SourceOver);painter.drawPixmap(m_indentation, 0, mask);painter.setCompositionMode(QPainter::CompositionMode_SourceIn);painter.drawPixmap(m_indentation, 0, src.scaled(masksize, Qt::KeepAspectRatio, Qt::SmoothTransformation));painter.end();return QPixmap::fromImage(resultImage);
}void EmployeeNodeItem::paintEvent(QPaintEvent *event)
{QWidget::paintEvent(event);
}

这篇关于基于QTreeWidget实现带Checkbox的多级组织结构选择树的文章就介绍到这儿，希望我们推荐的文章对编程师们有所帮助！


http://www.chinasem.cn/article/501667。

相关文章

C#集成DeepSeek模型实现AI私有化的流程步骤(本地部署与API调用教程)

C#集成DeepSeek模型实现AI私有化的流程步骤(本地部署与API调用教程)

《C#集成DeepSeek模型实现AI私有化的流程步骤(本地部署与API调用教程)》本文主要介绍了C#集成DeepSeek模型实现AI私有化的方法,包括搭建基础环境,如安装Ollama和下载DeepS... 目录前言搭建基础环境1、安装 Ollama2、下载 DeepSeek R1 模型客户端 ChatBo
阅读更多...
Qt实现发送HTTP请求的示例详解

Qt实现发送HTTP请求的示例详解

《Qt实现发送HTTP请求的示例详解》这篇文章主要为大家详细介绍了如何通过Qt实现发送HTTP请求,文中的示例代码讲解详细,具有一定的借鉴价值,感兴趣的小伙伴可以跟随小编一起学习一下... 目录1、添加network模块2、包含改头文件3、创建网络访问管理器4、创建接口5、创建网络请求对象6、创建一个回复对
阅读更多...
C++实现回文串判断的两种高效方法

C++实现回文串判断的两种高效方法

《C++实现回文串判断的两种高效方法》文章介绍了两种判断回文串的方法：解法一通过创建新字符串来处理,解法二在原字符串上直接筛选判断,两种方法都使用了双指针法,文中通过代码示例讲解的非常详细,需要的朋友... 目录一、问题描述示例二、解法一：将字母数字连接到新的 string思路代码实现代码解释复杂度分析三、
阅读更多...
grom设置全局日志实现执行并打印sql语句

grom设置全局日志实现执行并打印sql语句

《grom设置全局日志实现执行并打印sql语句》本文主要介绍了grom设置全局日志实现执行并打印sql语句,包括设置日志级别、实现自定义Logger接口以及如何使用GORM的默认logger,通过这些... 目录gorm中的自定义日志gorm中日志的其他操作日志级别Debug自定义 Loggergorm中的
阅读更多...
Spring Boot整合消息队列RabbitMQ的实现示例

Spring Boot整合消息队列RabbitMQ的实现示例

《SpringBoot整合消息队列RabbitMQ的实现示例》本文主要介绍了SpringBoot整合消息队列RabbitMQ的实现示例,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的... 目录RabbitMQ 简介与安装1. RabbitMQ 简介2. RabbitMQ 安装Spring
阅读更多...
Gin框架中的GET和POST表单处理的实现

Gin框架中的GET和POST表单处理的实现

《Gin框架中的GET和POST表单处理的实现》Gin框架提供了简单而强大的机制来处理GET和POST表单提交的数据,通过c.Query、c.PostForm、c.Bind和c.Request.For... 目录一、GET表单处理二、POST表单处理1. 使用c.PostForm获取表单字段：2. 绑定到结
阅读更多...
mysql通过frm和ibd文件恢复表_mysql5.7根据.frm和.ibd文件恢复表结构和数据

mysql通过frm和ibd文件恢复表_mysql5.7根据.frm和.ibd文件恢复表结构和数据

《mysql通过frm和ibd文件恢复表_mysql5.7根据.frm和.ibd文件恢复表结构和数据》文章主要介绍了如何从.frm和.ibd文件恢复MySQLInnoDB表结构和数据,需要的朋友可以参... 目录一、恢复表结构二、恢复表数据补充方法一、恢复表结构（从 .frm 文件）方法 1：使用 mysq
阅读更多...
springMVC返回Http响应的实现

springMVC返回Http响应的实现

《springMVC返回Http响应的实现》本文主要介绍了在SpringBoot中使用@Controller、@ResponseBody和@RestController注解进行HTTP响应返回的方法,... 目录一、返回页面二、@Controller和@ResponseBody与RestController
阅读更多...
nginx中重定向的实现

nginx中重定向的实现

《nginx中重定向的实现》本文主要介绍了Nginx中location匹配和rewrite重定向的规则与应用,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下... 目录一、location1、 location匹配2、 location匹配的分类2.1 精确匹配2
阅读更多...
Nginx之upstream被动式重试机制的实现

Nginx之upstream被动式重试机制的实现

《Nginx之upstream被动式重试机制的实现》本文主要介绍了Nginx之upstream被动式重试机制的实现,可以通过proxy_next_upstream来自定义配置,具有一定的参考价值,感兴... 目录默认错误选择定义错误指令配置proxy_next_upstreamproxy_next_upst
阅读更多...

Copyright China编程 23002807@qq.com

沪ICP备2023033072号-2