ORA-00942: 表或视图不存在-向日葵屋

ORA-00942: 表或视图不存在

在pl/sql中使用oracle的system用户创建了一张表emp，因为使用dba身份登录的，用java代码能获取连接

public static Connection getConnection() throws Exception{
        Connection conn = null;
        try {
            Class.forName("oracle.jdbc.driver.OracleDriver");
            conn = DriverManager.getConnection(
                    "jdbc:oracle:thin:@127.0.0.1:1521:orcl",
                    "System", "ognl");
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
        return conn;

这是获取的连接

oracle.jdbc.driver.T4CConnection@deb6432

但是去操作表时，就发生

java.sql.SQLSyntaxErrorException: ORA-00942: 表或视图不存在
 at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439) at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395) at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186) at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521) at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:205) at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:861) at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1145) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1267) at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449) at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3493) at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1491) at dao.EmployeeDAO.findAll(EmployeeDAO.java:109) at test.EmployeeDAOTest.testFindAll(EmployeeDAOTest.java:15) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498)