jdbc连接java工程和Oracle数据库

首选导入安装路径下jdbc里的jar包（class12.jar）,然后创建java工程，编写一个java类，主要代码如下

Connection conn = null;

ResultSet rs = null;

PreparedStatement pstmt = null;

// 注册驱动

try {

Class.forName("oracle.jdbc.driver.OracleDriver");

conn = DriverManager.getConnection(

"jdbc:oracle:thin://10.1.98.13:1521:zzz", "dw_zzz",

"dw_zzz");

} catch (ClassNotFoundException e) {

System.out.println("驱动类没找到");

} catch (SQLException e) {

System.out.println("得到Connection连接对象出错");

}

try {

pstmt = conn.prepareStatement("select * from PRODUCTS");

rs = pstmt.executeQuery();

System.out.println("ID \t PROMC");

while (rs.next()) {

System.out.println(rs.getString("ID") + "\t"

+ rs.getString("PROMC"));

}

} catch (SQLException e0) {

System.out.println("数据库操作异常" + e0.getMessage());

} finally {

try {

if (rs != null) {

rs.close();

}

if (pstmt != null) {

pstmt.close();

}

if (conn != null && !conn.isClosed()) {

conn.close();

}

} catch (SQLException e) {

e.printStackTrace();

}

}