before

<add key="ConnectionString" value="Data Source=BZJL_JN;User ID=jhbz_nj;Password=jhbz_nj;"/> 

after

    <add key="ConnectionString" value="Data Source =(DESCRIPTION =(ADDRESS=(PROTOCOL=TCP)(HOST =IP)(PORT=1521))(CONNECT_DATA= (SERVICE_NAME = orcl11g)))
; User ID = USER; Password=PSD;"/>