1创建更新用户持久层

void updateUserByUserId(Users users);

/**

* 更新用户

* @param users

*/

@Override

public void updateUserByUserId(Users users) {

Connection conn = null;

try{

conn = JdbcUtils.getConnection();

conn.setAutoCommit(false);

PreparedStatement preparedStatement = conn.prepareStatement("update users set username=? ,usersex = ?,phonenumber=?,qqnumber = ? where userid = ? ");

preparedStatement.setString(1,users.getUsername());

preparedStatement.setString(2,users.getUsersex());

preparedStatement.setString(3,users.getPhonenumber());

preparedStatement.setString(4,users.getQqnumber());

preparedStatement.setInt(5,users.getUserid());

preparedStatement.execute();

conn.commit();

}catch(Exception e){

e.printStackTrace();

JdbcUtils.rollbackConnection(conn);

}finally {

JdbcUtils.closeConnection(conn);

}

}

2创建更新用户业务层

void modifyUser(Users users);

/**

* 修改用户

* @param users

*/

@Override

public void modifyUser(Users users) {

UserManagerDao userManagerDao = new UserManagerDaoImpl();

userManagerDao.updateUserByUserId(users);

}

3创建更新用户Servlet

/**

* 处理更新用户请求

*/

private void modifyUser(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException{

String userid = req.getParameter("userid");

Users users = this.createUsers(req);

users.setUserid(Integer.parseInt(userid));

try{

UserManagerService userManagerService = new UserManagerServiceImpl();

userManagerService.modifyUser(users);

resp.sendRedirect("ok.jsp");

}catch(Exception e){

e.printStackTrace();

resp.sendRedirect("error.jsp");

}

}

4修改更新用户页面

修改updateUser.jsp

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基本信息

用户名

性别男

女

男

女

手机号

QQ号

5 测试结果