1. 安装Oracle数据库，我这里使用的是Oracle 12c
2. 创建Java工程 connection-oracle
注意：使用的JavaSE-1.8
3. 在Oracle的安装目录里，将djdbc8.jar 拷贝到java工程
路径为：C:\app\oracle\product\12.2.0\dbhome_1\jdbc\lib
4. 创建连接Oracle的java类
public class OracleJdbcTest {
//数据库连接对象
private static Connection conn = null;
private static String driver = "oracle.jdbc.driver.OracleDriver"; //驱动
private static String url = "jdbc:oracle:thin:@//127.0.0.1:1521/orcl"; //连接字符串
private static String username = "system"; //用户名
private static String password = "123456"; //密码
// 获得连接对象
private static synchronized Connection getConn(){
if(conn == null){
try {
Class.forName(driver);
conn = DriverManager.getConnection(url, username, password);
} catch (ClassNotFoundException e) {
e.printStackTrace();
}catch (SQLException e) {
e.printStackTrace();
}
}
return conn;
}
//执行查询语句
public void query(String sql, boolean isSelect) throws SQLException{
PreparedStatement pstmt;
try {
pstmt = getConn().prepareStatement(sql);
//建立一个结果集，用来保存查询出来的结果
ResultSet rs = pstmt.executeQuery();
while (rs.next()) {
String name = rs.getString("name");
System.out.println(name);
}
rs.close();
pstmt.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
public void query(String sql) throws SQLException{
PreparedStatement pstmt;
pstmt = getConn().prepareStatement(sql);
pstmt.execute();
pstmt.close();
}
//关闭连接
public void close(){
try {
getConn().close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
5. 创建调用类
public class ConnOracle {
public static void main(String[] args) throws SQLException {
OracleJdbcTest test = new OracleJdbcTest();
try {
test.query("drop table student");
} catch (SQLException e) {}
test.query("create table student(id int, name nchar(20))");
test.query("insert into student values(1,'zhangsan')");
test.query("insert into student values(2,'lisi')");
test.query("select * from student", true);
test.close();
}
}
6. 显示结果