boost 字符串,json

转换

#include <iostream>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/lexical_cast.hpp>using namespace boost;int main(){    try{int x=lexical_cast<int>("100");float f=lexical_cast<float>("100.123456");printf("f=%f\n",f);std::string str=lexical_cast<std::string>(12.365);std::cout<<str<<std::endl;str=lexical_cast<std::string>(0x10);std::cout<<str<<std::endl;    }    catch(bad_lexical_cast& e){    std::cout << e.what() << std::endl;    }}

f=100.12345912.36516

格式化

#include <iostream>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/format.hpp>#include <boost/format/exceptions.hpp>using namespace boost;int main(){    try{        std::cout<<format("%s:%d,%d")%"hello"%123%999<<std::endl;        format fmt("%1% %2%,%2%, %3%");//%n%标记第n个参数        fmt%123%999%"hello";        std::cout<<fmt.str()<<std::endl;        format fmt2("%10d %.2f");//此种与printf类似的写法        fmt2%66%2.567;        std::cout<<fmt2.str()<<std::endl;    }    catch(io::format_error& e){        std::cout << e.what() << std::endl;    }}

hello:123,999123 999,999, hello        66 2.57

判断

#include <iostream>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/algorithm/string.hpp>using namespace boost;int main(){    try{    std::string str("Power Bomb");    assert(iends_with(str,"Bomb"));    assert(!ends_with(str,"bomb"));    assert(istarts_with(str,"Power"));    assert(!starts_with(str,"power"));    assert(contains(str,"er"));    assert(!contains(str,"Er"));    assert(equals(str,"Power Bomb"));    assert(!equals(str,"power Bomb"));    }    catch(std::exception& e){    std::cout << e.what() << std::endl;    }}

修剪

#include <iostream>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/algorithm/string.hpp>#include <boost/format.hpp>using namespace boost;int main(){format fmt("|%s|\n");    try{    std::string str("   Power Bomb   ");    std::cout<<fmt%trim_left_copy(str);    std::cout<<fmt%trim_right_copy(str);    std::cout<<fmt%trim_copy(str);    }    catch(std::exception& e){    std::cout << e.what() << std::endl;    }}

|Power Bomb   ||   Power Bomb||Power Bomb|

查找

#include <iostream>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/format.hpp>#include <boost/algorithm/string.hpp>using namespace boost;int main(){    try{    format fmt("|%s|.pos=%d\n");    std::string str = "Long Long ago , there is a girl";    iterator_range<std::string::iterator> rge;    rge=find_first(str,"long");    std::cout<<fmt%rge%(rge.begin()-str.begin());    rge=ifind_first(str,"long");    std::cout<<fmt%rge%(rge.begin()-str.begin());    }    catch(io::format_error& e){    std::cout << e.what() << std::endl;    }}

||.pos=31|Long|.pos=0

替换和删除

#include <iostream>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/algorithm/string.hpp>using namespace boost;int main(){    try{    std::string str = "Samus and Samus fuck the pig\n";    std::cout<<replace_all_copy(str,"Samus","jim");    std::cout<<replace_first_copy(str,"Samus","jim");    std::cout<<replace_last_copy(str,"Samus","jim");    std::cout<<replace_tail_copy(str,1,"Samus\n");    std::cout<<erase_last_copy(str,"Samus");    std::cout<<erase_tail_copy(str,2);    std::cout<<erase_head_copy(str,2);    }    catch(std::exception& e){    std::cout << e.what() << std::endl;    }}

jim and jim fuck the pigjim and Samus fuck the pigSamus and jim fuck the pigSamus and Samus fuck the pigSamusSamus and  fuck the pigSamus and Samus fuck the pimus and Samus fuck the pig

分割

#include <iostream>#include <deque>#include <boost/bind.hpp>#include <boost/date_time/posix_time/posix_time.hpp>#include <boost/algorithm/string.hpp>using namespace boost;int main(){    try{std::string str = "Samus,and,Samus fuck the,pig";std::deque<std::string> d;split(d,str,is_any_of(","),token_compress_on);for(std::deque<std::string>::iterator it=d.begin();it!=d.end();it++){std::cout<<(*it)<<std::endl;}    }    catch(std::exception& e){    std::cout << e.what() << std::endl;    }}

SamusandSamus fuck thepig

解析json
a.json

{"server":[{"type":"tcp","ip":"1.2.3.4","port":"8088"},{"type":"tcp","ip":"2.2.3.5","port":"9900"}],"trace":[{"type":"udp","ip":"192.168.1.116","port":"9988"}],"info":[{"id":"1234566","pswd":"12345678","version":"0.9"}],"pattern":"LUCE","pattern2":"XIANKAN"}

#include <iostream>#include <boost/property_tree/ptree.hpp>#include <boost/property_tree/json_parser.hpp>#include <boost/foreach.hpp>int ParseJson(){int fd = open("a.json", O_RDONLY);if (fd < 0) {DBG("open zed_WXCJ.conf err");return false;}char buf[1024]={0};int len = read(fd, buf, sizeof(buf));if(len<=0)return false;std::string str=buf;using namespace boost::property_tree;std::stringstream ss(str);ptree pt;try{read_json(ss, pt);}catch(ptree_error & e) {printf("%s\n",e.what());}  try{    std::string sPt = pt.get<std::string>("pattern");    std::cout<<sPt<<std::endl;    ptree image_array = pt.get_child("server");    BOOST_FOREACH(boost::property_tree::ptree::value_type &v, image_array)    {      std::string s2 = v.second.get<std::string>("ip");      int port = v.second.get<int>("port");      std::cout<<s2<<":"<<port<<std::endl;    }    image_array = pt.get_child("info");    BOOST_FOREACH(boost::property_tree::ptree::value_type &v, image_array)    {      std::string sId = v.second.get<std::string>("id");      std::string sPswd = v.second.get<std::string>("pswd");      std::string sVersion = v.second.get<std::string>("version");      std::cout<<sId<<":"<<sPswd<<":"<<sVersion<<std::endl;    }  }  catch (ptree_error & e)  {  printf("%s\n",e.what());  }  return 0;}int main(){ParseJson();}