#include 
    
     #include 
     
      #include 
      
        //原子更新操作#include 
       
         using namespace std; using namespace leveldb;  int main(int argc,char * argv[]) {      leveldb::DB* db;      leveldb::Options op;      leveldb::Status s ;      op.create_if_missing = true;      //op.error_if_exists = true;     //string dbpath = "/tmp/testdb";      string dbpath = "/data/osd.1/current/omap";          s = leveldb::DB::Open(op, dbpath, &db);      assert(s.ok());      cout<<"open db succ"<
        
         Put(leveldb::WriteOptions(), key, val);     s = db->Get(leveldb::ReadOptions(), key, &retVal);     s = db->Delete(leveldb::WriteOptions(), key);     cout<
         
          <
          
           NewIterator( leveldb::ReadOptions() );     std::string mkey,mval;    for ( it->SeekToFirst(); it->Valid(); it->Next() )    {         mkey = it->key().ToString();        mval = it->value().ToString();        cout << "key=" << mkey <<", val=" << mval <
           
            status().ok()); //check    delete it;    delete db;     cout<<"over!"<
           
          
         
        
       
      
     
    

rm ./ldbtestg++ -g ldbtest.cpp -o ldbtest -L. -I./include -lpthread -lleveldb ./ldbtest

参考：

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