在 5.5/Src/qtbase/src/sql/drivers/mysql/qsql_mysql.cpp代碼有問題，重新編譯插件就好了： diff --git a/qsql_mysql.cpp b/qsql_mysql.cpp index 04a1be1..b9bffd5 100644 --- a/qsql_mysql.cpp +++ b/qsql_mysql.cpp @@ -1273,7 +1273,12 @@ bool QMYSQLDriver::open(const QString& db, } } <pre class='brush: cpp'>- if ((d->mysql = mysql_init((MYSQL*) 0))) { + if (!(d->mysql = mysql_init((MYSQL*) 0))) { + setLastError(qMakeError(tr("Unable to allocate a MYSQL object"), + QSqlError::ConnectionError, d)); + setOpenError(true); + return false; + } #if MYSQL_VERSION_ID >= 50000 if (connectTimeout != 0) mysql_options(d->mysql, MYSQL_OPT_CONNECT_TIMEOUT, &connectTimeout); @@ -1305,7 +1310,7 @@ bool QMYSQLDriver::open(const QString& db, if (reconnect) mysql_options(d->mysql, MYSQL_OPT_RECONNECT, &reconnect); #endif - } + } else { setLastError(qMakeError(tr("Unable to connect"), QSqlError::ConnectionError, d));</pre>