c++操作leveldb数据库

1.源码实现

#include <iostream>
#include <leveldb/db.h>

using namespace std;

int main()
{
    leveldb::DB *db;
    leveldb::Options options;

    options.create_if_missing = true;

    string dbpath = "./leveldb.db";

    leveldb::Status status = leveldb::DB::Open(options, dbpath, &db);

    if(status.ok() == false)
    {
        cout << "leveldb open failed" << endl;
        return -1;
    }

    string key = "petter";
    string value = "good to see you ";

    cout << "Open db ok" << endl;

    string result;

    status = db->Put(leveldb::WriteOptions(), key, value);
    if(status.ok() == false)
    {
        cout << "leveldb write failed " << endl;
        delete db;
        return -1;
    }

    cout << "insert successful" << endl;

    status = db->Get(leveldb::ReadOptions(), key, &result);

    if(status.ok() == false)
    {
        cout << "leveldb read failed" << endl;
        delete db;
        return -1;
    }

    cout << "result: " << result << endl;

    delete db;

    return 0;
}

2.编译源码

$ g++ -o test test.cpp -std=c++11 -lleveldb

3.运行及其结果

$ ./test
Open db ok
insert successful
result: good to see you