springjdbc 调用oracle函数返回对象

	public String AgentCanJs(int agentId,final String date) {
		final String sqlString = " { ?=call fun_power_js_check(?)}";
		
		return this.getJdbcTemplate().execute(new ConnectionCallback(){

			@Override
			public Object doInConnection(Connection conn) throws SQLException,DataAccessException {
				 	CallableStatement call = conn.prepareCall(sqlString);
				 	call.registerOutParameter(1, OracleTypes.NVARCHAR);
	                call.setString(2,date);
	                call.execute();
	                String string = call.getString(1);
	                call.close();
	                return string;
				
			}});
	}