/*****************************************************************************************************
* Qt jsoncpp 对象拷贝、删除、函数调用 demo
* 声明：
* 本程序主要就是为了验证jsoncpp中Json::Value对象中的append、等号赋值是拷贝内容，还是赋值指针，
* 就测试而言，从目前的情况来看应该是拷贝内容，代码得以验证。
*
* 2015-11-15 晴 深圳 南山平山村 曾剑锋
****************************************************************************************************/
/**
* 参考文档：
* 1. JsonCpp ambiguous overload only in Windows
* http://stackoverflow.com/questions/18901781/jsoncpp-ambiguous-overload-only-in-windows
* 2. QT 使用jsoncpp
* http://www.cnblogs.com/foxhengxing/archive/2011/12/02/2272020.html
* 3. Using JsonCpp and Qt Together (Problems with Unicode)
* http://stackoverflow.com/questions/4191528/using-jsoncpp-and-qt-together-problems-with-unicode
* 4. ambiguous overload for 'operator[]'
* http://www.gamedev.net/topic/618752-ambiguous-overload-for-operator/
* 5. 一个C++编译错误
* http://blog.chinaunix.net/uid-7865778-id-2038882.html
*/
#include <QCoreApplication>
#include "json/json.h"
#include <QString>
#include <QFile>
#include <QDebug>
#define ICON_PATH "apps\/images\/"
#define SHELL_PATH "\/usr\/share\/web\/lighttpd\/webpages\/shell\/"
#define JSON_FILE "F:\/QT\/json.txt"
void jsonUpdateApp(Json::Value *programs, int index, QString icon, QString exec) {
// 名字相同了，自然不需要再重新赋值了
//(*programs)[index]["Name"] = name.toStdString();
(*programs)[index]["Icon"] = QString(ICON_PATH).append(icon).toStdString();
(*programs)[index]["Exec"] = QString(SHELL_PATH) .append(exec).append(".sh").toStdString();
}
void jsonAddApp(Json::Value *programs, QString name, QString icon, QString exec) {
// 合成新的数据并加入json对象中
Json::Value item;
item["Name"] = name.toStdString();
item["Order"] = 999;
item["Icon"] = QString(ICON_PATH).append(icon).toStdString();
item["Type"] = "application";
item["Exec"] = QString(SHELL_PATH).append(exec).append(".sh").toStdString();
item["ProgramType"] = "gui";
item["Description_Link"] = -1;
item["Lock"] = -1;
programs->append(item);
}
void copyItem(Json::Value *programs, Json::Value *newPrograms, int index) {
// 合成新的数据并加入json对象中
Json::Value newItem;
newItem["Name"] = (*programs)[index]["Name"];
newItem["Order"] = (*programs)[index]["Order"];
newItem["Icon"] = (*programs)[index]["Icon"];
newItem["Type"] = (*programs)[index]["Type"];
newItem["Exec"] = (*programs)[index]["Exec"];
newItem["ProgramType"] = (*programs)[index]["ProgramType"];
newItem["Description_Link"] = (*programs)[index]["Description_Link"];
newItem["Lock"] = (*programs)[index]["Lock"];
newPrograms->append(newItem);
}
bool checkAndAddUpdateAppByName(Json::Value *oldRoot, Json::Value *newRoot, QString name,
QString icon, QString exec) {
bool ret = false;
Json::Value programs = ((*oldRoot)["main_menu"])["apps"];
Json::Value newPrograms;
int i = 0;
for ( i = 0; i < programs.size(); i++ ) {
// 如果有name对应的app，那么就对app进行更新
if ( QString::fromStdString(programs[i]["Name"].asString()).trimmed().compare(name.trimmed()) == 0 ) {
jsonUpdateApp(&programs, i, icon, exec);
ret = true;
}
copyItem(&programs, &newPrograms, i);
}
// 如果name没有重复的，那么添加一个这个app
if ( i >= programs.size() )
jsonAddApp(&newPrograms, name, icon, exec);
Json::Value newApps;
newApps["apps"] = newPrograms;
(*newRoot)["main_menu"] = newApps;
return ret;
}
bool checkAndRemoveAppName(Json::Value *oldRoot, Json::Value *newRoot, QString name) {
bool ret = false;
Json::Value programs = ((*oldRoot)["main_menu"])["apps"];
Json::Value newPrograms;
int i = 0;
for ( i = 0; i < programs.size(); i++ ) {
if ( QString::fromStdString(programs[i]["Name"].asString()).trimmed().compare(name.trimmed()) == 0 ) {
ret = true;
continue;
}
/*
* // 合成新的数据并加入json对象中
* Json::Value newItem;
* newItem["Name"] = programs[i]["Name"];
* newItem["Order"] = programs[i]["Order"];
* newItem["Icon"] = programs[i]["Icon"];
* newItem["Type"] = programs[i]["Type"];
* newItem["Exec"] = programs[i]["Exec"];
* newItem["ProgramType"] = programs[i]["ProgramType"];
* newItem["Description_Link"] = programs[i]["Description_Link"];
* newItem["Lock"] = programs[i]["Lock"];
*
* newPrograms.append(newItem);
*
* 下面这个函数是从上面的代码中重构出来的
*/
copyItem(&programs, &newPrograms, i);
}
Json::Value newApps;
newApps["apps"] = newPrograms;
(*newRoot)["main_menu"] = newApps;
return ret;
}
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
// 检查文件是否存在
QFile jsonFileObject("F:/QT/json.txt");
if ( !jsonFileObject.exists() ) {
qDebug() << "Please check json.txt file already exist." << endl;
return -1;
}
// 打开并读取文件
QString jsonString;
if ( jsonFileObject.open(QIODevice::ReadOnly | QIODevice::Text) ) {
jsonString.append(jsonFileObject.readAll());
jsonFileObject.close();
} else {
qDebug() << "Open json file failt." << endl;
return -1;
}
// 解析json数据
Json::Value root;
Json::Reader reader;
bool parsingSuccessful = reader.parse(jsonString.toStdString(), root);
if ( !parsingSuccessful ) {
qDebug() << "Failed to parse configure.\n ";
return -1;
}
// 测试获取json数据
Json::Value programs = root["main_menu"]["apps"];
qDebug() << "programs size: " << programs.size();
// 这里的获取数据数据索引后面一定要加一个小写的u，目前还不知道具体的原因
std::cout << "Exec: " << programs[0u]["Exec"].asString() << std::endl;
Json::Value outRootWithRemove;
checkAndRemoveAppName(&root, &outRootWithRemove, "Network");
Json::Value outRootWithRemoveAndAdd;
checkAndAddUpdateAppByName(&outRootWithRemove, &outRootWithRemoveAndAdd, "zengjf", "zengjf", "zengjf");
// 生成写入文件的字符串
Json::StyledWriter writer;
std::string outputJsonstring = writer.write(outRootWithRemoveAndAdd);
// 将输出字符串输出到console上查看效果
std::cout << outputJsonstring << std::endl;
// 如果仅仅是测试，不需要写入文件，省的每次还要去换json.txt文件
if ( jsonFileObject.open(QIODevice::WriteOnly | QIODevice::Text) ) {
jsonFileObject.write(outputJsonstring.data());
jsonFileObject.close();
} else {
qDebug() << "Open json file failt." << endl;
return -1;
}
return a.exec();
}
/**
* json.txt
* {
* "main_menu" : {
* "apps" : [
* {
* "Description_Link" : -1,
* "Exec" : "/usr/share/web/lighttpd/webpages/shell/browser.sh http://processors.wiki.ti.com",
* "Icon" : "apps/images/web-icon.png",
* "Lock" : -1,
* "Name" : "Browser",
* "Order" : 999,
* "ProgramType" : "gui",
* "Type" : "application"
* },
* {
* "Description_Link" : -1,
* "Exec" : "/usr/share/web/lighttpd/webpages/shell/network.sh",
* "Icon" : "apps/images/network-icon.png",
* "Lock" : -1,
* "Name" : "Network",
* "Order" : 999,
* "ProgramType" : "gui",
* "Type" : "application"
* }
* ]
* }
*/
/**
* 输出结果：
* json.txt
* {
* "main_menu" : {
* "apps" : [
* {
* "Description_Link" : -1,
* "Exec" : "/usr/share/web/lighttpd/webpages/shell/browser.sh http://processors.wiki.ti.com",
* "Icon" : "apps/images/web-icon.png",
* "Lock" : -1,
* "Name" : "Browser",
* "Order" : 999,
* "ProgramType" : "gui",
* "Type" : "application"
* },
* {
* "Description_Link" : -1,
* "Exec" : "/usr/share/web/lighttpd/webpages/shell/zengjf.sh",
* "Icon" : "apps/images/zengjf",
* "Lock" : -1,
* "Name" : "zengjf",
* "Order" : 999,
* "ProgramType" : "gui",
* "Type" : "application"
* }
* ]
* }
*/
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