增刪改方法：

public static int update(String sql,Object...param) {
		int rowNumber=0;
		try {
			PreparedStatement psmt=DBConnection.getConnection().prepareStatement(sql);
			ParameterMetaData pmd=psmt.getParameterMetaData();
			if(param!=null&&param.length!=0&param.length==pmd.getParameterCount()) {
				for(int i = 0,len=param.length;i<len;i++) {
					psmt.setObject(i+1, param[i]);
				}				
			}
			DBUtils.printRealSql(sql, param);
			rowNumber=psmt.executeUpdate();
		} catch (SQLException e) {
			log.error("update method error,this exception is:"+e.getMessage());
		} finally {
			try {
				if(DBConnection.getConnection().getAutoCommit()) {
					DBConnection.closeConnection(DBConnection.getConnection());
				}
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return rowNumber;		
	}
 

查詢方法：

	public static<T> T query(String sql,ResultSetHandler<T> rsh,Object...param){
		T t=null;
		try {
			PreparedStatement psmt=DBConnection.getConnection().prepareStatement(sql);
			ParameterMetaData pmd=psmt.getParameterMetaData();
			if(param!=null&&param.length!=0&&param.length==pmd.getParameterCount()) {
				for(int i = 0,len=param.length;i<len;i++) {
					psmt.setObject(i+1, param[i]);
				}
			}
			ResultSet rs=psmt.executeQuery();
			t= rsh.handler(rs);
		} catch (SQLException e) {
			log.error("query method error,the exception is:"+e.getMessage());
		} finally {
			try {
				if(DBConnection.getConnection().getAutoCommit()) {
					DBConnection.closeConnection(DBConnection.getConnection());
				}
			} catch (SQLException e) {
				e.printStackTrace();
			}
		}
		return t;
	}