JDBC基础

 1     //（1）通过反射加载数据库驱动
 2     Class.forName("com.mysql.jdbc.Driver");
 3     
 4     //（2）通过DriverManager获取数据库连接
 5     String url="jdbc:mysql://127.0.0.1:3306/mydb";
 6     String user="root";
 7     String password ="w5566";
 8     Connection conn = DriverManager.getConnection(url, user, password);
 9     
10     //（3）通过Connection创建普通Statement对象
11     Statement statement = conn.createStatement();
12     
13     //（4）使用Statement执行SQL语句,返回ResultSet对象
14     String sql = "select * from test";
15     ResultSet rs = statement.executeQuery(sql);
16     
17     //（5）操作ResultSet结果集
18     while(rs.next()){
19         System.out.println(rs.getString(1)+"\t"+rs.getString(2)+"\t"+rs.getString(3)+"\t"+rs.getString(4)+"\t");
20     }

 1   String sql = "insert into test(UID,username,password,email,phone) value(?,?,?,?,?)";
 2   PreparedStatement pStatement = conn.prepareStatement(sql);
 3   for (int i = 0; i < 1000; i++) {
 4       pStatement.setString(1, UUID.randomUUID().toString());
 5       pStatement.setString(2, "user" + i);
 6   　　pStatement.setString(3, "pass" + i);
 7   　　pStatement.setString(4, "email" + i);
 8  　　 pStatement.setString(5, "phone" + i);
 9       pStatement.executeUpdate();
10   }
11   conn.commit();