JAVA中oracle与access间的数据迁移

        最近做的项目中用到将oracle数据导出到access中和将access中数据导入到oracle中，大致操作如下：

使用jdbc进行数据库连接操作

 

连接oracle：

             Class.forName("oracle.jdbc.driver.OracleDriver");
             oracleUrl="jdbc:oracle:thin:@<host>:<port>:<SID> ";
             Connection oracleConn=  DriverManager.getConnection(oracleUrl,"userName","password");
             String oracleSql="select * from .....";
             PreparedStatement oraclePs = conn.prepareStatement(oracleSql);
             //执行查询，查询数据存储在oracleRs结果集中
             ResultSet oracleRs=oraclePs.execute();
            //ResultSetMetaData可以获取记录的字段名、字段类型、字段数等信息
            ResultSetMetaData oracleRsoracleRsmd = oracleRs.getMetaData();
            while(oracleRs.next()){                  //遍历每一条记录
                    for（int i = 1; i <=oracleRsmd .getColumnCount(); i++）{ //遍历记录的每一个字段

                            //依次获取每一个字段的值，注意：此处不能重复获取统一个i的值

                             System.out.println(oracleRs.getString(i));

                           //依次获取每个字段的字段名

                            System.out.println(oracleRsmd .getColumnName(i));

                           //依次获取每个字段的类型，注意：此处不要写成oracleRsmd.getColumnType(i)

                             System.out.println(oracleRsmd .getColumnTypeName(i));

                               }
            }

连接access：

             Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");

             //此处对应office2003的access文件2007以上后缀为accdb请注意 另外文件名位置自己改

              String accessUrl="jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=C:\\test.mdb";

              //连接access的数据库一般来说都不需要密码（自己设了除外）

              Connection accessConn= DriverManager.getConnection(accessUrl,"","")

              String accessSql ="insert ........";
              PreparedStatement accessPs = accessConn.prepareStatement(accessSql);
              ResultSet accessRs = accessPs.executeQuery();
              ResultSetMetaData accessRsaccessRsmd = accessRs.getMetaData();

             ..............//下面操作与上面一样了

这两段代码嵌套搭配就可以实现数据的导出了，需要注意的是：oracle的字段类型和access字段类型有差别所以在创建表的时候要先获取字段类型进行判断转换，例如：

            if("VARCHAR2".equals(oracleRsmd .getColumnTypeName(i))){

                //下面zzz代码access中与varchar2对应的数据类型 sql语句需要循环来拼字符串

                 String accessSql="create table xxx ( yyy zzzz,.............";

           }

下面附上access与oracle字段对应表

 

The table below shows the ADO Data Type mapping between Access, SQL Server, and Oracle:

DataType Enum	Value	Access	SQLServer	Oracle
adBigInt	20		BigInt (SQL Server 2000 +)
adBinary	128		Binary TimeStamp	Raw *
adBoolean	11	YesNo	Bit
adChar	129		Char	Char
adCurrency	6	Currency	Money SmallMoney
adDate	7	Date	DateTime
adDBTimeStamp	135	DateTime (Access 97 (ODBC))	DateTime SmallDateTime	Date
adDecimal	14			Decimal *
adDouble	5	Double	Float	Float
adGUID	72	ReplicationID (Access 97 (OLEDB)), (Access 2000 (OLEDB))	UniqueIdentifier (SQL Server 7.0 +)
adIDispatch	9
adInteger	3	AutoNumber Integer Long	Identity (SQL Server 6.5) Int	Int *
adLongVarBinary	205	OLEObject	Image	Long Raw * Blob (Oracle 8.1.x)
adLongVarChar	201	Memo (Access 97) Hyperlink (Access 97)	Text	Long * Clob (Oracle 8.1.x)
adLongVarWChar	203	Memo (Access 2000 (OLEDB)) Hyperlink (Access 2000 (OLEDB))	NText (SQL Server 7.0 +)	NClob (Oracle 8.1.x)
adNumeric	131	Decimal (Access 2000 (OLEDB))	Decimal Numeric	Decimal Integer Number SmallInt
adSingle	4	Single	Real
adSmallInt	2	Integer	SmallInt
adUnsignedTinyInt	17	Byte	TinyInt
adVarBinary	204	ReplicationID (Access 97)	VarBinary
adVarChar	200	Text (Access 97)	VarChar	VarChar
adVariant	12		Sql_Variant (SQL Server 2000 +)	VarChar2
adVarWChar	202	Text (Access 2000 (OLEDB))	NVarChar (SQL Server 7.0 +)	NVarChar2
adWChar	130		NChar (SQL Server 7.0 +)

* In Oracle 8.0.x - decimal and int are equal to number and number(10).