在C++中处理Oracle数据库异常，你需要使用Oracle Call Interface (OCI)库
包含必要的头文件：#include<iostream>#include <oci.h>#define CHECK_OCI(func, envhp, errhp) \ if ((func) != OCI_SUCCESS) { \ throw OracleException(envhp, errhp); \ }OracleException，用于处理Oracle数据库异常：class OracleException : public std::exception {public: OracleException(OCIEnv* envhp, OCIError* errhp) { OCIErrorGet((dvoid*)errhp, 1, NULL, &errorCode, errorMessage, sizeof(errorMessage), OCI_HTYPE_ERROR); OCIHandleFree((dvoid*)envhp, OCI_HTYPE_ENV); OCIHandleFree((dvoid*)errhp, OCI_HTYPE_ERROR); } const char* what() const noexcept override { return errorMessage; } int getErrorCode() const { return errorCode; }private: char errorMessage[512]; int errorCode;};int main() { try { OCIEnv* envhp = nullptr; OCIError* errhp = nullptr; OCISvcCtx* svchp = nullptr; OCIServer* srvhp = nullptr; OCISession* usrhp = nullptr; // 初始化环境句柄 CHECK_OCI(OCIEnvCreate(&envhp, OCI_DEFAULT, 0, 0, 0, 0, 0, 0), envhp, errhp); // 分配错误句柄 CHECK_OCI(OCIHandleAlloc((dvoid*)envhp, (dvoid**)&errhp, OCI_HTYPE_ERROR, 0, 0), envhp, errhp); // 分配服务器句柄 CHECK_OCI(OCIHandleAlloc((dvoid*)envhp, (dvoid**)&srvhp, OCI_HTYPE_SERVER, 0, 0), envhp, errhp); // 分配服务上下文句柄 CHECK_OCI(OCIHandleAlloc((dvoid*)envhp, (dvoid**)&svchp, OCI_HTYPE_SVCCTX, 0, 0), envhp, errhp); // 分配会话句柄 CHECK_OCI(OCIHandleAlloc((dvoid*)envhp, (dvoid**)&usrhp, OCI_HTYPE_SESSION, 0, 0), envhp, errhp); // 设置用户名和密码 CHECK_OCI(OCIAttrSet((dvoid*)usrhp, OCI_HTYPE_SESSION, (dvoid*)"username", (ub4)strlen("username"), OCI_ATTR_USERNAME, errhp), envhp, errhp); CHECK_OCI(OCIAttrSet((dvoid*)usrhp, OCI_HTYPE_SESSION, (dvoid*)"password", (ub4)strlen("password"), OCI_ATTR_PASSWORD, errhp), envhp, errhp); // 连接到数据库 CHECK_OCI(OCIServerAttach(srvhp, errhp, (text*)"//localhost:1521/orcl", (ub4)strlen("//localhost:1521/orcl"), 0), envhp, errhp); CHECK_OCI(OCIAttrSet((dvoid*)svchp, OCI_HTYPE_SVCCTX, (dvoid*)srvhp, 0, OCI_ATTR_SERVER, errhp), envhp, errhp); CHECK_OCI(OCISessionBegin(svchp, errhp, usrhp, OCI_CRED_RDBMS, OCI_DEFAULT), envhp, errhp); CHECK_OCI(OCIAttrSet((dvoid*)svchp, OCI_HTYPE_SVCCTX, (dvoid*)usrhp, 0, OCI_ATTR_SESSION, errhp), envhp, errhp); // 在此处执行其他数据库操作... // 断开连接 CHECK_OCI(OCISessionEnd(svchp, errhp, usrhp, OCI_DEFAULT), envhp, errhp); CHECK_OCI(OCIServerDetach(srvhp, errhp, OCI_DEFAULT), envhp, errhp); // 释放句柄 OCIHandleFree((dvoid*)usrhp, OCI_HTYPE_SESSION); OCIHandleFree((dvoid*)svchp, OCI_HTYPE_SVCCTX); OCIHandleFree((dvoid*)srvhp, OCI_HTYPE_SERVER); OCIHandleFree((dvoid*)errhp, OCI_HTYPE_ERROR); OCIHandleFree((dvoid*)envhp, OCI_HTYPE_ENV); } catch (const OracleException& e) { std::cerr << "Oracle Error: " << e.what() << " (Error Code: " << e.getErrorCode() << ")"<< std::endl; return 1; } return 0;}这样，当OCI函数调用失败时，程序将抛出一个OracleException异常，你可以捕获该异常并处理错误。
