boost:property_tree 学习笔记
先放资料：
How to use boost::property_tree to load and write JSON
How to iterate a boost property tree?
不出现key的方法遍历一个json文件：
详细代码 1 /* *********************************************** 2 Author :111qqz 3 mail: renkuanze@sensetime.com 4 Created Time :2018年08月17日 星期五 15时29分23秒 5 File Name :ptree.cpp 6 ************************************************ */ 7 #include <boost/property_tree/ptree.hpp> 8 #include <boost/property_tree/json_parser.hpp> 9 #include <bits/stdc++.h> 10 #include <vector> 11 using namespace std; 12 using boost::property_tree::ptree; 13 14 string indent(int level) { 15 string s; 16 for (int i=0; i<level; i++) s += " "; 17 return s; 18 } 19 20 void printTree (ptree &pt, int level) { 21 if (pt.empty()) { 22 cerr << "\""<< pt.data()<< "\""; 23 } 24 25 else { 26 if (level) cerr << endl; 27 28 cerr << indent(level) << "{" << endl; 29 30 for (ptree::iterator pos = pt.begin(); pos != pt.end();) { 31 cerr << indent(level+1) << "\"" << pos->first << "\": "; 32 33 printTree(pos->second, level + 1); 34 ++pos; 35 if (pos != pt.end()) { 36 cerr << ","; 37 } 38 cerr << endl; 39 } 40 41 cerr << indent(level) << " }"; 42 } 43 44 return; 45 } 46 int main() 47 { 48 ptree root; 49 read_json("terr.json",root); 50 printTree(root,0); 51 52 53 return 0; 54 55 }