最简单的error 2084为什么我解决不了，哪里重定义了，请帮看一下

******************
HttpCache.h
******************

#ifndef _HTTP_CACHE_H
#define _HTTP_CACHE_H

#include <map>
#include "CacheItem.h"

class CHttpCache {
public:
    virtual ~CHttpCache() {}
    static CHttpCache& GetInstance();
    bool Cache(const char* const pszUri, const char* const pszBody);
    bool Cache(std::string sUri, std::string sBody);
    std::string Get(const char* const pszUri);
    std::string Get(std::string sUri);
    bool Delete(const char* const pszUri);
    bool Delete(std::string sUri);
    void Purge(long nDelta);
    std::map<std::string, CCacheItem*>& GetItems();
private:
    CHttpCache() {}
    static CHttpCache m_hInstance;
    std::map<std::string, CCacheItem*> m_hItems;
};

#include "HttpCache.cpp"

#endif //_HTTP_CAHE_H

******************
HttpCache.cpp
********************
#include <ctime>
#include "HttpCache.h"

CHttpCache CHttpCache::m_hInstance;

CHttpCache& CHttpCache::GetInstance() {
    return CHttpCache::m_hInstance;
}

bool CHttpCache::Cache(const char* const pszUri, const char* const pszBody) {
    return Cache(std::string(pszUri), std::string(pszBody));
}
bool CHttpCache::Cache(std::string sUri, std::string sBody) {
    std::map<std::string, CCacheItem*>::iterator iter = m_hItems.find(sUri);
    if(iter == m_hItems.end()) {
        CCacheItem* pItem = new CCacheItem(sUri, sBody);
        m_hItems[sUri] = pItem;
        return true;
    }
    iter->second->SetBody(sBody);
    iter->second->SetSince((long)time(NULL));
    return false;
}

std::string CHttpCache::Get(const char* const pszUri) {
    return Get(std::string(pszUri));
}

std::string CHttpCache::Get(std::string sUri) {
    std::map<std::string, CCacheItem*>::iterator iter = m_hItems.find(sUri);
    if(iter == m_hItems.end()) 
        return NULL;
    return iter->second->GetBody();

}

bool CHttpCache::Delete(const char* const pszUri) {
    return Delete(std::string(pszUri));
}    

bool CHttpCache::Delete(std::string sUri) {
    std::map<std::string, CCacheItem*>::iterator iter = m_hItems.find(sUri);
    if(iter == m_hItems.end()) 
        return false;

    CCacheItem* pItem = iter->second;
    m_hItems.erase(iter);
    delete pItem;

    return true;
    
}


void CHttpCache::Purge(long nDelta) { 
    long nNow = (long)time(NULL);
    for(std::map<std::string, CCacheItem*>::iterator iter = m_hItems.begin(); iter != m_hItems.end(); ) {
        if(iter->second->GetSince() > nNow - nDelta) {
            iter++;
            continue;
        }
        CCacheItem* pItem = iter->second;
        m_hItems.erase(iter++);
        delete pItem;
    }
}

std::map<std::string, CCacheItem*>& CHttpCache::GetItems() {
       return m_hItems;
}       

头文件声明函数，然后再定义，为啥全重定义

你的代码不止这些吧，报错都在CCacheItem类里
可以尝试在HttpCache.h中改成class CCacheItem;申明，然后在HttpCache.cpp中#include "CacheItem.h"试试