^_^,不知你下载什么数据库得jdbc?你可以到google上查一下专门得数据库得jdbc
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http://download.microsoft.com/download/3/0/f/30ff65d3-a84b-4b8a-a570-27366b2271d8/setup.exe
Provides the API for accessing and processing data stored in a data source (usually a relational database) using the JavaTM programming language. This API includes a framework whereby different drivers can be installed dynamically to access different data sources. Although the JDBCTM API is mainly geared to passing SQL statements to a database, it provides for reading and writing data from any data source with a tabular format. The reader/writer facility, available through the javax.sql.RowSet group of interfaces, can be customized to use and update data from a spread sheet, flat file, or any other tabular data source.
What the JDBCTM 3.0 API Includes
The JDBCTM 3.0 API includes both the java.sql package, referred to as the JDBC core API, and the javax.sql package, referred to as the JDBC Optional Package API. This complete JDBC API is included in the JavaTM 2 SDK, Standard Edition (J2SETM), version 1.4. The javax.sql package extends the functionality of the JDBC API from a client-side API to a server-side API, and it is an essential part of the JavaTM 2 SDK, Enterprise Edition (J2EETM) technology. (Note that the J2EE platform also includes the complete JDBC API; features new in the JDBC 3.0 API are included in the J2EE version 1.3). Versions
The JDBC 3.0 API incorporates all of the previous JDBC API versions:
The JDBC 2.1 core API
The JDBC 2.0 Optional Package API
(Note that the JDBC 2.1 core API and the JDBC 2.0 Optional Package API together are referred to as the JDBC 2.0 API.)
The JDBC 1.2 API
The JDBC 1.0 API
Classes, interfaces, methods, fields, constructors, and exceptions have the following "since" tags that indicate when they were introduced into the Java platform. When these "since" tags are used in JavadocTM comments for the JDBC API, they indicate the following: Since 1.4 -- new in the JDBC 3.0 API and part of the J2SE platform, version 1.4
Since 1.2 -- new in the JDBC 2.0 API and part of the J2SE platform, version 1.2
Since 1.1 or no "since" tag -- in the original JDBC 1.0 API and part of the JDKTM, version 1.1
NOTE: Many of the new features are optional; consequently, there is some variation in drivers and the features they support. Always check your driver's documentation to see whether it supports a feature before you try to use it. NOTE: The class SQLPermission was added in the JavaTM 2 SDK, Standard Edition, version 1.3 release. This class is used to prevent unauthorized access to the logging stream associated with the DriverManager, which may contain information such as table names, column data, and so on.