1、执行
CREATE USER c##posp IDENTIFIED BY posp;
ALTER USER c##posp QUOTA UNLIMITED ON USERS;
GRANT "CONNECT" TO c##posp;
GRANT "RESOURCE" TO c##posp;
GRANT CREATE ANY INDEX TO c##posp;
GRANT CREATE VIEW TO c##posp;
GRANT CREATE SESSION TO c##posp;
grant read,write on directory dmpdir to c##posp;

impdp c##posp/posp schemas=posp3 remap_schema=posp3:c##posp directory=dmpdir dumpfile=expdp_posp3.dmp logfile=impdp.log job_name=my_jod;

2、导入过程中提示错误
ORA-02374: conversion error loading table "C##POSP"."TBL_IPC_DFT_DSP"
ORA-12899: value too large for column IPC_DFT (actual: 266, maximum: 256)

ORA-02372: data for row: IPC_DFT : 0X'B9A4C9CCD2F8D0D0B3E5D5FDBDBBD2D7C7EBC7F32020202020'
因为字符集不一样
目标数据库字符集：al32utf8
源数据库字符集：zhs16gbk

没办法。。。