JDBC的CURD操做之修改操做

1.1.1 修改操做代碼實現

@Test

/**

 * 修改操做的代碼實現

 */

public void demo2(){

        Connection conn = null;

        Statement stmt  = null;

        try{

                // 註冊驅動:

                Class.forName("com.mysql.jdbc.Driver");

                // 得到鏈接

                conn = DriverManager.getConnection("jdbc:mysql:///web_test3", "root", "abc");

                // 執行操做:

                // 建立執行SQL語句的對象:

                stmt = conn.createStatement();

                // 編寫SQL語句：

                String sql = "update user set password='abc',nickname='旺財' where id = 5";

                // 執行SQL語句:

                int num = stmt.executeUpdate(sql);

                if(num > 0){

                        System.out.println("修改用戶成功!!!");

                }

        }catch(Exception e){

                e.printStackTrace();

        }finally{

                // 資源釋放：

                if(stmt != null){

                        try {

                                stmt.close();

                        } catch (SQLException e) {

                                e.printStackTrace();

                        }

                         

                        stmt = null;

                }

                if(conn != null){

                        try {

                                conn.close();

                        } catch (SQLException e) {

                                e.printStackTrace();

                        }

                        conn = null;

                }

        }

}