stmt.getParameterMetaData()异常AbstractMethodError

Exception：

DbUtils使用oracle 查询时

获取stmt.getParameterMetaData()

出现异常AbstractMethodError

解决：

创建QueryRunner时，pmdKnownBroken设置为true，错误解决。

分析原因：

Oracle drivers don't support {@link ParameterMetaData#getParameterType(int) }

通过查看QueryRunner源代码：

设置pmdKnownBroken为true 后，we won't even try it

     /**     * Constructor for QueryRunner, allows workaround for Oracle drivers.  Methods that do not take a      * <code>Connection</code> parameter will retrieve connections from this     * <code>DataSource</code>.     *      * @param ds The <code>DataSource</code> to retrieve connections from.     * @param pmdKnownBroken Oracle drivers don't support {@link ParameterMetaData#getParameterType(int) };     * if <code>pmdKnownBroken</code> is set to true, we won't even try it; if false, we'll try it,     * and if it breaks, we'll remember not to use it again.     */    public QueryRunner(DataSource ds, boolean pmdKnownBroken) {        super();        this.pmdKnownBroken = pmdKnownBroken;        this.ds = ds;    }

if (!pmdKnownBroken) {
            pmd = stmt.getParameterMetaData();
            if (pmd.getParameterCount() < params.length) {                throw new SQLException("Too many parameters: expected "                        + pmd.getParameterCount() + ", was given " + params.length);            }        }



	
				
	
					   
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