c++ 筛选裁决文书 1985-2021的数据 分析算法的差异

c++ cpp 并行计算筛选过滤 裁决文书网1985-2021 的300g数据

数据

数据解压以后大概300g，最开始是使用python代码进行计算，但是python实在太慢了，加上多进程也不行，
于是 使用c++ 进行 计算
c++这块最开始使用的是 i7-9700h 用的是单线程，使用三个程序程序同步计算，大概需要2-3个小时的样子。

改成c++多线程，电脑换成i9-12900h 20核心的，就快得多了。
最多也就是30分钟

解压的时候，是使用python调用zip，多进程进行解压，python解压代码如下：
python代码写的也能看出来，最开始其实就是用单线程，但是也是很慢，不过我用的多进程的时候，也是慢，原因是 磁盘io到达最大，这里教训我以后要尽量找个磁盘io大的程序

import traceback
import os
import shutil
import sys


def get_all_file(path):
    # import os
    return_list=[]
    for root,dirs,files in os.walk(path,topdown=True):
        for file_one in files:
            use_path=root+'/'+file_one
            return_list.append(use_path.replace('/','\\'))
    return return_list


# w文件区域。
main_path=os.getcwd()  # exe文件存放的路径。

import os
import zipfile

# 定义zip文件所在的目录
zip_dir = './3669万专利申请全量数据1985-2022年'
zip_dir = './zhongguo_caijue_ziliaoku/main_zip'

# 遍历目录下的所有文件

# for file_name in get_all_file(zip_dir):
#     if file_name.endswith('.zip'):
#         # 构建zip文件的完整路径
#         # zip_path = os.path.join(zip_dir, file_name)
        
#         zip_path= file_name


#         # 创建一个与zip文件同名的文件夹来存放解压后的文件
#         output_dir = os.path.splitext(zip_path)[0]
#         os.makedirs(output_dir, exist_ok=True)
        
#         # 打开zip文件
#         with zipfile.ZipFile(zip_path, 'r') as zip_ref:
#             # 解压zip文件到指定的输出目录
#             zip_ref.extractall(output_dir)
        
#         print(f'Successfully extracted {file_name} to {output_dir}')

def get_zip_fuc(file_name,mi):

    if file_name.endswith('.zip'):
        # 构建zip文件的完整路径
        # zip_path = os.path.join(zip_dir, file_name)
        
        zip_path= file_name


        # 创建一个与zip文件同名的文件夹来存放解压后的文件
        output_dir = os.path.splitext(zip_path)[0]
        os.makedirs(output_dir, exist_ok=True)
        
        # 打开zip文件
        with zipfile.ZipFile(zip_path, 'r') as zip_ref:
            # 解压zip文件到指定的输出目录
            zip_ref.extractall(output_dir)
        
        print(f'Successfully extracted {mi} {file_name} to {output_dir}')

import multiprocessing

if __name__ == '__main__':

    pool = multiprocessing.Pool(processes=20)
    # main_len = len(node_n2_list_list)
    for mi,file_name in enumerate(get_all_file(zip_dir)):
        pool.apply_async(get_zip_fuc, args=(file_name,mi))
        
    pool.close()
    pool.join()



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回到c++计算这里，对于 多文件，单个文件也很大的程序，我采取的做法是比较简单的，也就是一个线程负责一个文件的计算筛选，通过线程锁来提取对应的程序。

// by guangdu  wx:wo15985300747 
// 有需要用c++加速计算的可以联系我，我可以给你封装为各种各样语言的实现
// 大数据处理的也可以一起聊聊
// 复杂网络也是一样哦

#include "pool_number.cpp"
#include <thread>
#include <iostream>
#include <chrono>
#include <vector>
using namespace std;

int cpu_number(){
    // SYSTEM_INFO sysInfo;
    // GetSystemInfo(&sysInfo);
    // unsigned int numCores1 = sysInfo.dwNumberOfProcessors;
    // return numCores1;

    unsigned int numCores = std::thread::hardware_concurrency();
    return numCores;
}



# include <iostream>
#include <windows.h>
#include <string>
#include <basci/basci.h> //

using namespace std;


#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <sstream>

using namespace std;

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

using namespace std;

vector<vector<string>> read_csv(string filename)
{

    vector<vector<string>> data;
    ifstream file(filename);

    if (!file.is_open()) {
        cerr << "Failed to open file: " << filename << endl;
        return data;
    }

    enum State { UnquotedField, QuotedField, QuotedQuote };
    State state = UnquotedField;

    vector<string> row;
    string field;
    char c;

    while (file.get(c)) {
        switch (state) {
            case UnquotedField:
                switch (c) {
                    case ',': // end of field
                        row.push_back(field);
                        field.clear();
                        break;
                    case '"': // start of quoted field
                        state = QuotedField;
                        break;
                    case '\n': // end of row
                        row.push_back(field);
                        data.push_back(row);
                        row.clear();
                        field.clear();
                        break;
                    default:
                        field.push_back(c);
                        break;
                }
                break;
            case QuotedField:
                switch (c) {
                    case '"': // end of quoted field
                        state = QuotedQuote;
                        break;
                    default:
                        field.push_back(c);
                        break;
                }
                break;
            case QuotedQuote:
                switch (c) {
                    case ',': // comma inside quotes
                        row.push_back(field + "\"");
                        field.clear();
                        state = UnquotedField;
                        break;
                    case '"': // escaped quote
                        field.push_back('"');
                        state = QuotedField;
                        break;
                    case '\n': // end of row
                        row.push_back(field);
                        data.push_back(row);
                        row.clear();
                        field.clear();
                        state = UnquotedField;
                        break;
                    default: // end of quote
                        row.push_back(field);
                        field.clear();
                        state = UnquotedField;
                        break;
                }
                break;
        }
    }

    if (!field.empty()) {
        row.push_back(field);
    }

    if (!row.empty()) {
        data.push_back(row);
    }
    file.close();
    // 减少复制的损耗
    return std::move(data);
}




#include <iostream>
#include <fstream>

using namespace std;

int getFileSize(string filePath) {
    ifstream file(filePath, ios::binary | ios::ate);
    int size = file.tellg();
    file.close();
    return size/(1024*1024);
}


#include <chrono>
#include <chrono>
#include <ctime>
#include <iomanip>
#include <sstream>
#include <string>

std::string getCurrentTimeStr() {
  // 获取当前时间
  auto now = std::chrono::system_clock::now();
  std::time_t time = std::chrono::system_clock::to_time_t(now);

  // 将时间格式化为字符串
  std::stringstream ss;
  ss << std::put_time(std::localtime(&time), "%Y_%m_%d_%H_%M_%S");
  return ss.str();
}

// bool write_in(string xx, vector<string> dd_list) {
//     for (const auto& str : dd_list) {
//         if (xx.find(str) != string::npos) {
//             return true;
//         }
//     }
//     return false;
// }

bool write_in(string xx, const vector<string>& dd_list) {
    for (const string& str : dd_list) {
        if (xx.find(str) != string::npos) {
            return true;
        }
    }
    return false;
}


// #include <iostream>
// #include <vector>
// #include <string>

// std::ostream& operator<<(std::ostream& os, const std::vector<std::string>& vec) {
//     os << "[";
//     int i=0;
//     for (auto it = vec.begin(); it != vec.end(); ++it) {
//         // if (it != vec.begin()) {
//         //     os << ", ";
//         // }
//         os <<"   "<<i<<" "<< *it<<endl;
//         i=i+1;
//     }
//     os << "]";
//     return os;
// }


// void write_csv_file(string file_name,vector<vector<string>> main_list){
// }

/*
#include <fstream>
#include <iostream>
#include <vector>
using namespace std;
void write_csv_file(string file_name, vector<vector<string>> main_list) {
    ofstream file(file_name);
    if (file.is_open()) {
        for (vector<string> row : main_list) {
            for (int i = 0; i < row.size(); i++) {
                string cell = row[i];
                if (cell.find_first_of(",\"\n") != string::npos) {
                    file << "\"";
                    for (char c : cell) {
                        if (c == '\"') {
                            file << "\"\"";
                        } else {
                            file << c;
                        }
                    }
                    file << "\"";
                } else {
                    file << cell;
                }
                if (i < row.size() - 1) {
                    file << ",";
                }
            }
            file << "\n";
        }
        file.close();
    } else {
        cerr << "Unable to open file: " << file_name << endl;
    }
}
*/


#include <fstream>
#include <iostream>
#include <vector>
using namespace std;

void write_csv_file(string file_name, vector<vector<string>>* main_list) {
    ofstream file(file_name);
    if (file.is_open()) {
        for (vector<string>& row : *main_list) {
            for (int i = 0; i < row.size(); i++) {
                string& cell = row[i];
                if (cell.find_first_of(",\"\n") != string::npos) {
                    file << "\"";
                    for (char c : cell) {
                        if (c == '\"') {
                            file << "\"\"";
                        } else {
                            file << c;
                        }
                    }
                    file << "\"";
                } else {
                    file << cell;
                }
                if (i < row.size() - 1) {
                    file << ",";
                }
            }
            file << "\n";
        }
        file.close();
    } else {
        cerr << "Unable to open file: " << file_name << endl;
    }
}




#include <iostream>
#include <chrono>
#include <ctime>
#include <cstdlib>

using namespace std;




#include <iostream>
#include <thread>
#include <mutex>

std::mutex mtx;  // 定义一个互斥锁

int now_sum_id_number;





vector<vector<string >> re_vector_2d_list_fuc(int fi,int main_i,int main_len,long long csv_i,string read_file,string new_path,int main_number,vector<string> str_list ){

    std::unique_lock<std::mutex> lock(mtx, std::defer_lock);  // 定义一个未加锁的unique_lock


    // 读取一个csv文件，获得其中的内容
    enum State { UnquotedField, QuotedField, QuotedQuote };
    vector<string> row;
    string field;
    char c;
    State state;

     auto start_time = std::chrono::high_resolution_clock::now();
     std::chrono::time_point<std::chrono::high_resolution_clock> end_time;
     vector<vector<string >> data_list;

     // int main_len =  main_list.len();

    // for (node *p = main_list.head->next; p != main_list.head; p = p->next) {
        cout<<endl<<endl;
        cout<< main_i<<"/"<<main_len<<"  "<<fi<<"  "<<getFileSize(read_file)<<"  "<<gbktoutf8(read_file)<<endl;
        main_i = main_i+1;

        ifstream file(read_file, std::ios::in);
        if (!file.is_open()) {
            cerr << "Failed to open file: " << read_file << endl;
        }

        state = UnquotedField;
        while (file.get(c)) {
            switch (state) {
                case UnquotedField:
                    switch (c) {
                        case ',': // end of field
                            row.push_back(field);
                            field.clear();
                            break;
                        case '"': // start of quoted field
                            state = QuotedField;
                            break;
                        case '\n': // end of row
                            row.push_back(field);
                            // data.push_back(row);


                            // fi=fi+1;
                            // if(fi%100000==0){
                            //     end_time = std::chrono::high_resolution_clock::now();
                            //     // cout<<"fi  "<<fi<<"  "<<std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count()<<"   "<<row.size()<<endl;
                            //     // cout<<"fi  "<<fi<<"  "<<(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count())/ 1e6 <<"   "<<row.size()<<endl;
                            //     cout<<"       sum_row_number "<<main_number<<"  "<<fi/10000<<"   time[s] "<<(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count())/ 1e6 <<"   row_size "<<row.size()<<"    "<<row[10] <<endl;
                            //     // cout<<"file fix  "<<fi/10000<<"  "<<std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count()<<"   "<<row.size()<<"  "<<gbktoutf8 (p->str )<<"    "<<row[10] <<endl;
                            //     // cout<<row<<endl;
                            //     // cout<<"    "<<row[10]<<endl;
                            // }

                            if(write_in(gbktoutf8(row[10]),str_list)){
                                ;//执行写入
                                data_list.push_back(row);
                                main_number= main_number+1;
                                if(main_number%10000==0){
                                    end_time = std::chrono::high_resolution_clock::now();
                                    // cout<<"清空与整理a "<<main_number<<endl;
                                    cout<<"       sum_row_number "<<main_number<<"  "<<fi/10000<<"   time[s] "<<(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count())/ 1e6 <<"   row_size "<<row.size()<<"    "<<row[10] <<endl;

                                    lock.lock();  // 手动开启线程锁
                                        now_sum_id_number = now_sum_id_number+1;
                                    lock.unlock();  // 手动关闭线程锁



                                    write_csv_file(new_path +"/"+to_string(now_sum_id_number)+"  "+ to_string(csv_i)+".csv",data_list);
                                    data_list.clear();
                                    csv_i=csv_i+1;

                                }
                            }


                            row.clear();
                            field.clear();
                            break;
                        default:
                            field.push_back(c);
                            break;
                    }
                    break;
                case QuotedField:
                    switch (c) {
                        case '"': // end of quoted field
                            state = QuotedQuote;
                            break;
                        default:
                            field.push_back(c);
                            break;
                    }
                    break;
                case QuotedQuote:
                    switch (c) {
                        case ',': // comma inside quotes
                            row.push_back(field + "\"");
                            field.clear();
                            state = UnquotedField;
                            break;
                        case '"': // escaped quote
                            field.push_back('"');
                            state = QuotedField;
                            break;
                        case '\n': // end of row
                            row.push_back(field);
                            // data.push_back(row);


                            // fi=fi+1;
                            // if(fi%10000==0){
                            //     end_time = std::chrono::high_resolution_clock::now();
                            //     // cout<<"file fix  "<<fi/10000<<"  "<<std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count()<<"   "<<row.size()<<"  "<<gbktoutf8 (p->str )<<"    "<<row[10] <<endl;
                            //     cout<<"       sum_row_number "<<main_number<<"  "<<fi/10000<<"   time[s] "<<(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count())/ 1e6 <<"   row_size "<<row.size()<<"    "<<row[10] <<endl;
                            //     // cout<<row<<endl;
                            //     // cout<<"    "<<row[10]<<endl;
                            // }


                            if(write_in(gbktoutf8(row[10]),str_list)){
                                ;//执行写入
                                data_list.push_back(row);
                                main_number= main_number+1;

                                if(main_number%10000==0){
                                    end_time = std::chrono::high_resolution_clock::now();
                                    // cout<<"清空与整理a "<<main_number<<endl;
                                    cout<<"       sum_row_number "<<main_number<<"  "<<fi/10000<<"   time[s] "<<(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count())/ 1e6 <<"   row_size "<<row.size()<<"    "<<row[10] <<endl;
                                    // cout<<"清空与整理b "<<main_number<<endl;
                                    // write_csv_file(new_path +"/"+ to_string(csv_i)+".csv",data_list);

                                    lock.lock();  // 手动开启线程锁
                                        now_sum_id_number = now_sum_id_number+1;
                                    lock.unlock();  // 手动关闭线程锁

                                    write_csv_file(new_path +"/"+to_string(now_sum_id_number)+"  "+ to_string(csv_i)+".csv",data_list);
                                    data_list.clear();
                                    csv_i=csv_i+1;
                                }

                            }

                            row.clear();
                            field.clear();
                            state = UnquotedField;
                            break;
                        default: // end of quote
                            row.push_back(field);
                            field.clear();
                            state = UnquotedField;
                            break;
                    }
                    break;
            }
        }
        if (!field.empty()) {
            row.push_back(field);
        }

        if (!row.empty()) {
            fi=fi+1;
            // if(fi%10000==0){
            //     cout<<"fi  "<<fi<<endl;
            // }
            // data.push_back(row);
            end_time = std::chrono::high_resolution_clock::now();
            cout<<"file fix  "<<main_number<<"  "<<fi/10000<<"  "<<std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count()<<"   "<<row.size()<<"  "<<gbktoutf8 (read_file)<<"    "<<row[10] <<endl;
            // cout<<"                  "<<row[10]<<endl;

            if(write_in(gbktoutf8(row[10]),str_list)){
                ;//执行写入
                data_list.push_back(row);

                main_number= main_number+1;
                if(main_number%10000==0){
                    // cout<<"清空与整理c "<<main_number<<endl;
                    // write_csv_file(new_path +"/"+ to_string(csv_i)+".csv",data_list);

                    lock.lock();  // 手动开启线程锁
                        now_sum_id_number = now_sum_id_number+1;
                    lock.unlock();  // 手动关闭线程锁
                    write_csv_file(new_path +"/"+to_string(now_sum_id_number)+"  "+ to_string(csv_i)+".csv",data_list);

                    data_list.clear();
                    csv_i=csv_i+1;
                }
            }
        }



        end_time = std::chrono::high_resolution_clock::now();
        cout<<"       sum_row_number "<<main_number<<"  "<<fi/10000<<"   time[s] "<<(std::chrono::duration_cast<std::chrono::microseconds>(end_time - start_time).count())/ 1e6 <<"   row_size "<<row.size()<<"    "<<row[10] <<endl;
        cout<<"file size  "<<main_number<<"   "<<gbktoutf8(read_file)<<endl;
        file.close();
    // }




    cout<<"main_len "<<data_list.size()<<endl;

    // write_csv_file(new_path +"/"+ to_string(csv_i+1)+".csv",data_list);

    lock.lock();  // 手动开启线程锁
        now_sum_id_number = now_sum_id_number+1;
    lock.unlock();  // 手动关闭线程锁



    write_csv_file(new_path +"/"+to_string(now_sum_id_number)+"  "+ to_string(csv_i)+".csv",data_list);

    return std::move(data_list);


}






int main() {

    // string date_str = "2021-06-29-01"; // 给定的日期字符串

    // // 将日期字符串转换为时间点
    // tm date_tm = {};
    // strptime(date_str.c_str(), "%Y-%m-%d-%H", &date_tm);
    // time_t date_time = mktime(&date_tm);
    // auto date_point = chrono::system_clock::from_time_t(date_time);

    // // 获取当前时间点
    // auto now_point = chrono::system_clock::now();

    // // 判断当前时间是否超过给定时间点
    // if (now_point > date_point) {
    //     cout << "Current time has exceeded the given date." << endl;
    //     exit(0); // 退出程序
    // }


    //记录程序开始的时间是多久

    auto start = std::chrono::high_resolution_clock::now();

    now_sum_id_number=0; // 标记具体的线程中的进度


    // 传递一个文件路径，传递一个二维数组，写入一下。
    // int csv_i=0;
    int csv_i=26;

    // 十万行写入一次，传入一次，少计算数量多次

	system("chcp 65001");
	u_init();
	cout<<"exe path: "<<main_path<<endl;
    vector<vector<string>> data;
	string read_path = main_path+utf8togbk("/读取文件");
	ulist main_list =get_all_file(read_path);
	cout<<main_list.len()<<endl;
	int main_i =0;
	int fi=0;

    string write_path = main_path    +utf8togbk("/写入文件");
    make_file(write_path);

    string   new_path = write_path +utf8togbk("/")+ getCurrentTimeStr();
    make_file(new_path  );


    // 开始读取数据了，等于0 的不要，写一个函数，传递一个值，和一个数组，返回其中的内容。

    vector<string> str_list;

    // str_list.push_back(utf8togbk("买卖合同纠纷"));
    // str_list.push_back("买卖合同纠纷");

    vector<vector<string>> csv_list= read_csv(utf8togbk("查询词.csv"));
    copy_file(utf8togbk("查询词.csv").c_str(),new_path.c_str());
    // cout<<<<endl;

    cout<<"---------------------------------------------------------------------------------------------------------"<<endl;

    int main_number=0;


    int cxi=0;
    string cxd="";
    for(auto & dc:csv_list){

        cxd = gbktoutf8(dc[0]);
        if(cxd!= ""){
            cout<<"查询关键词序列  在其中  "<<cxi<<" :"<<cxd<<endl;
            str_list.push_back(cxd);
        }else{
            cout<<"查询关键词序列 不在其中 "<<cxi<<" :"<<cxd<<endl;
            // str_list.push_back(cxd);
        }

        cxi=cxi+1;
    }



    cout<<"---------------------------------------------------------------------------------------------------------"<<endl;
    int main_len = main_list.len();


       //-------------------------------------------------------------------
    // auto start = std::chrono::high_resolution_clock::now();
    cout<<"cpu_number "<<cpu_number()<<endl;
    int pool_size = cpu_number();
    int task_num = 23;

    ThreadPool threadpool(pool_size);
    vector<future<vector<vector<string>>>> resVec;

    string read_file;
    for (node *p = main_list.head->next; p != main_list.head; p = p->next){
        read_file = p->str;

        resVec.emplace_back(
            // 分为前后两个部分，参数要对的上。
            threadpool.AddTask([fi,main_i,main_len,csv_i,read_file,new_path,main_number,str_list] { return re_vector_2d_list_fuc(fi,main_i,main_len,csv_i,read_file,new_path,main_number,str_list); })
        );
    } 



    int write_file_number = 0;

    vector<vector<vector<string>>> remain_list;
    /*打印每个任务的返回值*/
    for (auto&& result: resVec) {
        remain_list.push_back(result.get());
        // cout <<"data: "<< result.get() << " \n";
    }

    for(auto dd:remain_list){
        // cout<<dd<<endl;
    }
    // 获取结束时间点
    auto end = std::chrono::high_resolution_clock::now();
    // 计算代码执行时间（以毫秒为单位）
    auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(end - start).count();
    // 输出执行时间
    std::cout << "run time:" << duration << " ms" << std::endl;
    

    cout << endl;

	system("pause");
	return 0;
}


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c++ 运行效果，用27g大小的部分计算的，非常快 60s不到

pass 还有一个线程池文件，有需要call，我发你吧。

分析c++的 main.cpp 文件，逻辑是
获取指定文件夹下的所有文件，然后开启线程池计算，不断计算就可以了。

//转载请勿去除我的联系方式