-5

我将如何模拟这个异常：

java.sql.SQLException: Invalid state, the CallableStatement object is closed.
    at net.sourceforge.jtds.jdbc.JtdsCallableStatement.checkOpen(JtdsCallableStatement.java:120)
    at net.sourceforge.jtds.jdbc.JtdsStatement.getConnection(JtdsStatement.java:1207)
    at net.sourceforge.jtds.jdbc.JtdsResultSet.getConnection(JtdsResultSet.java:409)
    at net.sourceforge.jtds.jdbc.JtdsResultSet.close(JtdsResultSet.java:470)
    at org.apache.tomcat.dbcp.dbcp.DelegatingResultSet.close(DelegatingResultSet.java:152)
    at

使用 Java 代码。

下面的这段代码有时会产生上面的错误，但有时不会：

   private void doRequest(HttpServletRequest request) throws IOException, ServletException {
        CallableStatement stmt = null;
        ResultSet rs = null;
        String someString;
        try {
            this.connectDB();
            stmt = this.conn.prepareCall("{call sp_SomeSP1(?)}");
            stmt.setLong(1, someFunc());

            rs = stmt.executeQuery();

            while (rs.next()) {
                if (rs.getInt(1)==someOtherFunc()) {
                    someString = rs.getString(2);
                    break;
                }
            }

            stmt = conn.prepareCall("{call sp_someSP(?, ?)}");
            stmt.setLong(1, someFunc());
            stmt.setTimestamp(3, new Timestamp(getFrom().getTime()));

            rs = stmt.executeQuery();
            if (rs.next()) {
                lastUpdated = rs.getTimestamp("LastUpdated");
            }

            request.setAttribute("lastUpdated", lastUpdated);

            LOGGER.debug("Forwarding to view...");
            getServletContext().getRequestDispatcher("/SomeJSP.jsp").forward(this.request, this.response);

        } catch (NamingException e) {
            LOGGER.error("Database connection lookup failed", e);
            sendError("Server Error");
        } catch (SQLException e) {
            LOGGER.error("Query failed", e);
            sendError("Server Error");
        } catch (IllegalStateException e) {
            LOGGER.error("View failed", e);
        } finally {
            try {
                if (rs!=null) rs.close(); 
            } catch (NullPointerException e) {
                LOGGER.error("Result set closing failed", e);
            } catch (SQLException e) {
                LOGGER.error("Result set closing failed", e);
            }
            try {
                if (stmt!=null) stmt.close();
            } catch (NullPointerException e) {
                LOGGER.error("Statement closing failed", e);
            } catch (SQLException e) {
                LOGGER.error("Statement closing failed", e);
            }
            try {
                this.closeDB();
            } catch (NullPointerException e) {
                LOGGER.error("Database connection closing failed", e);
            } catch (SQLException e) {
                LOGGER.error("Database connection closing failed", e);
            }
        }
4

3 回答 3

1

我在想这样的事情：

  1. 创建一个准备好的语句并使用它进行查询，返回一个结果集。
  2. 关闭准备好的语句。
  3. 关闭准备好的语句后尝试关闭结果集。
于 2012-12-18T22:08:48.050 回答
0

Using Mockito:

when(mockResultSet.close()).doThrow(new SQLException("Invalid state, the CallableStatement object is closed."));
于 2012-12-18T22:09:56.980 回答
0

在调用之前调用close ()statementexecute();

于 2012-12-18T22:08:54.163 回答