零基础学习java------33---------http协议,tomcat(其如何在eclipse上发布)
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一. HTTP协议
https://www.cnblogs.com/vamei/archive/2013/05/11/3069788.html
二. tomcat---------->web服务器
1. tomcat是一款提供web服务的软件,其用处为:
(1)提供访问静态资源
(2)给用户提供了自定义业务逻辑的接口
2. 什么是web服务器?
遵循http协议,可以提供访问静态资源和动态资源的软件称为web\'服务器()
浏览器请求服务器的流程图
3. tomcat软件的目录结构
startup.bat 双击启动
4. tomcat在eclipse发布
第一步:点击eclipse上的window--->Preferences--->Server--->runtime Enviroments---->Add,得到如下图
注意,此处可能会没有Server选项,解决办法-------->https://www.cnblogs.com/jj1106/p/11599239.html
选择自己的tomcat版本
点击apply and close即可完成发布
点击eclipse右上角的open Perspective,并在下拉框中选择java EE,如下图
注意,此处可能没有java EE的选项(没安装java ee的插件),解决办法:https://www.cnblogs.com/jj1106/p/11600948.html
这时候,下面就会出现Servers选项(若没有的话windows ---> show view - > servers),如下图
5. 创建web项目
(1)new ---> dynamic web project -- >
(2)将项目部署在tomcat中
(2)部署完项目后就启动项目
访问此web服务器:http://localhost:8080/day12/demo1.html
即可得到demo1.html中的文本内容
三. 注册案例
1. 前端注册页面(写在WebCont中):
访问时:localhost:8080/项目名/reister.html
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>注册页面</title> </head> <body> <h1>xxx注册中心</h1> <form action="Register" method="post"> 姓名:<input type="text" name="username" /></br></br> 昵称:<input type="text" name="nickname" /></br></br> 密码:<input type="password" name="password" /></br></br> 手机号:<input type="text" name="phonenumber" /></br></br> 邮箱:<input type="text" name="mail" /></br></br> <input type="submit" value="注册"/> </form>> </body> </html>
2. 后台部分:
(1)admin
Register
创建的时候是选择servlet
public class Register extends HttpServlet { private static final long serialVersionUID = 1L; UserService userService = new UserServiceImpl(); protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8"); try { // 获取前台发送的参数 String username = request.getParameter("username"); String nickname = request.getParameter("nickname"); String password = request.getParameter("password"); String phonenumber = request.getParameter("phonenumber"); String mail = request.getParameter("mail"); System.out.println(username); // User对象去接受这些参数 User user = new User(username, nickname, password, phonenumber, mail); boolean b = userService.register(user); if(b) { response.sendRedirect("/day12/success.html"); }else { response.sendRedirect("/day12/register.html"); } } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
(2)service
UserService接口
public interface UserService { // 注册 public boolean register(User user) throws Exception; }
UserService接口实现类(UserServiceImpl)
public class UserServiceImpl implements UserService{ /** * 注册实现 */ @Override public boolean register(User user) throws Exception { boolean flag = false; UserDao userDao = new UserDaoImpl(); int i = userDao.insertUserToDb(user); if(i>0) { flag = true; } return flag; } }
(3)pojo
User(根据从前端接收的数据来确定属性)
public class User { private String username; private String nickname; private String password; private String phonenumber; private String email; public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getNickname() { return nickname; } public void setNickname(String nickname) { this.nickname = nickname; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public String getPhonenumber() { return phonenumber; } public void setPhonenumber(String phonenumber) { this.phonenumber = phonenumber; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public User(String username, String nickname, String password, String phonenumber, String email) { super(); this.username = username; this.nickname = nickname; this.password = password; this.phonenumber = phonenumber; this.email = email; } @Override public String toString() { return "User [username=" + username + ", nickname=" + nickname + ", password=" + password + ", phonenumber=" + phonenumber + ", email=" + email + "]"; } }
(4)dao
此处需要导一些jar包,如下(不需要build path)
UserDao接口
public interface UserDao { /** * 往数据库中添加用户 * @param user * @return */ public int insertUserToDb(User user) throws Exception; }
UserDao实现类
public class UserDaoImpl implements UserDao{ static QueryRunner runner; static { // 获取数据库池对象 ComboPooledDataSource dataSource = new ComboPooledDataSource(); runner = new QueryRunner(dataSource); } @Override public int insertUserToDb(User user) { int in = 0; try { String sql = "insert into user values(null,?,?,?,?,?)"; in = runner.update(sql,user.getUsername(),user.getNickname(),user.getPassword(),user.getPhonenumber(),user.getEmail()); } catch (Exception e) { in = -1; } return in; } }
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