Spring MVC用户注册和登录示例
原文地址： https://dzone.com/articles/spring-mvc-example-for-user-registration-and-login-1?edition=274902&utm_source=Daily%20Digest&utm_medium=email&utm_campaign=dd%202017-03-04
通过
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· Web Dev Zone
本文是使用几种Web开发语言和数据库设置用户注册和登录的分步指南。
通过
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本文是使用以下工具和技术的用户注册和登录的分步指南。
Spring框架（Core，MVC和JBDC）
2. Java 1.8
3.Maven 3.3.9
4. Eclipse IDE（Mars2）
5. MySQL 5.1
步骤1：创建Maven项目
使用Eclipse IDE，通过选择Web Archetype创建Maven项目。
步骤2：更新Pom.xml
更新你的maven依赖。
4.0.0
jbr
SpringMvcUser
war
0.1
SpringMvcUser Maven Webapp
http://maven.apache.org
UTF-8
4.3.2.RELEASE
4.12
3.1.0
3.0.1
5.1.9
junit
junit
${junit.version}
test
javax.servlet
javax.servlet-api
${servlet.version}
org.springframework
spring-core
${spring.version}
org.springframework
spring-beans
${spring.version}
org.springframework
spring-context
${spring.version}
org.springframework
spring-jdbc
${spring.version}
org.springframework
spring-test
${spring.version}
test
org.springframework
spring-webmvc
${spring.version}
javax.servlet
javax.servlet-api
${servlet.version}
mysql
mysql-connector-java
${mysql.connector.version}
SpringMvcUser
步骤3：更新web.xml
更新src / main / webapp / WEB-INF下的web.xml，如下所示：
Archetype Created Web Application
home.jsp
spring-mvc
org.springframework.web.servlet.DispatcherServlet
1
spring-mvc
/
-
DispatcherServlet是您的应用程序中定义的任何Servlet的根Servlet。 它将根据URL将对应用程序发出的请求重定向到相应的控制器。 -
spring-mvc是根servlet的名称，Spring容器将查找具有此名称的配置。 所以下一步是使用spring-mvc-servlet.xml创建一个spring配置。
步骤4：创建spring-mvc-servlet.xml
创建spring-mvc-servlet.xml 在src / main / webapp / WEB-INF文件夹下，并定义bean。
步骤5：创建控制器
为用户注册和登录创建单独的控制器，如下所示。
创建一个包jbr.springmvc.controller
RegistrationController.java
package jbr.springmvc.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import jbr.springmvc.model.User;
import jbr.springmvc.service.UserService;
@Controller
public class RegistrationController {
@Autowired
public UserService userService;
@RequestMapping(value = "/register", method = RequestMethod.GET)
public ModelAndView showRegister(HttpServletRequest request, HttpServletResponse response) {
ModelAndView mav = new ModelAndView("register");
mav.addObject("user", new User());
return mav;
}
@RequestMapping(value = "/registerProcess", method = RequestMethod.POST)
public ModelAndView addUser(HttpServletRequest request, HttpServletResponse response,
@ModelAttribute("user") User user) {
userService.register(user);
return new ModelAndView("welcome", "firstname", user.getFirstname());
}
}LoginController.java
package jbr.springmvc.controller;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import jbr.springmvc.model.Login;
import jbr.springmvc.model.User;
import jbr.springmvc.service.UserService;
@Controller
public class LoginController {
@Autowired
UserService userService;
@RequestMapping(value = "/login", method = RequestMethod.GET)
public ModelAndView showLogin(HttpServletRequest request, HttpServletResponse response) {
ModelAndView mav = new ModelAndView("login");
mav.addObject("login", new Login());
return mav;
}
@RequestMapping(value = "/loginProcess", method = RequestMethod.POST)
public ModelAndView loginProcess(HttpServletRequest request, HttpServletResponse response,
@ModelAttribute("login") Login login) {
ModelAndView mav = null;
User user = userService.validateUser(login);
if (null != user) {
mav = new ModelAndView("welcome");
mav.addObject("firstname", user.getFirstname());
} else {
mav = new ModelAndView("login");
mav.addObject("message", "Username or Password is wrong!!");
}
return mav;
}
}步骤5：创建POJO类
创建一个包： jbr.springmvc.model
Login.java
package jbr.springmvc.model;
public class Login {
private String username;
private String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}User.java
package jbr.springmvc.model;
public class User {
private String username;
private String password;
private String firstname;
private String lastname;
private String email;
private String address;
private int phone;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
public int getPhone() {
return phone;
}
public void setPhone(int phone) {
this.phone = phone;
}
}注意：如果您想添加任何新的逻辑，您可以添加另一个称为服务的层并访问DAO层。
步骤6：创建DAO类
创建用于访问MySQL数据库的接口/类。
创建一个包： jbr.springmvc.dao
UserDao.java
package jbr.springmvc.dao;
import jbr.springmvc.model.Login;
import jbr.springmvc.model.User;
public interface UserDao {
void register(User user);
User validateUser(Login login);
}UserDaoImpl.java
package jbr.springmvc.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import jbr.springmvc.model.Login;
import jbr.springmvc.model.User;
public class UserDaoImpl implements UserDao {
@Autowired
DataSource datasource;
@Autowired
JdbcTemplate jdbcTemplate;
public void register(User user) {
String sql = "insert into users values(?,?,?,?,?,?,?)";
jdbcTemplate.update(sql, new Object[] { user.getUsername(), user.getPassword(), user.getFirstname(),
user.getLastname(), user.getEmail(), user.getAddress(), user.getPhone() });
}
public User validateUser(Login login) {
String sql = "select * from users where username='" + login.getUsername() + "' and password='" + login.getPassword()
+ "'";
List users = jdbcTemplate.query(sql, new UserMapper());
return users.size() > 0 ? users.get(0) : null;
}
}
class UserMapper implements RowMapper {
public User mapRow(ResultSet rs, int arg1) throws SQLException {
User user = new User();
user.setUsername(rs.getString("username"));
user.setPassword(rs.getString("password"));
user.setFirstname(rs.getString("firstname"));
user.setLastname(rs.getString("lastname"));
user.setEmail(rs.getString("email"));
user.setAddress(rs.getString("address"));
user.setPhone(rs.getInt("phone"));
return user;
}
} 步骤7：创建Spring Bean配置
在resources ，创建一个新的xml bean配置user-beans.xml 来定义我们创建的bean。
步骤8：在MySQL中创建表
CREATE DATABASE
IF NOT EXISTS myusers;USE
DROP TABLE
DROP TABLE IF EXISTS `myusers`.`users`;CREATE TABLE `myusers`.`users`
(
`username` VARCHAR(45) NOT NULL,
`password` VARCHAR(45) NULL,
`firstname` VARCHAR(45) NOT NULL,
`lastname` VARCHAR(45) NULL,
`email` VARCHAR(45) NULL,
`address` VARCHAR(45) NULL,
`phone` INT NULL,
PRIMARY KEY (`username`)
)步骤9：创建视图
在/ src / main / webapp文件夹下，创建一个home.jsp，我们在web.xml中定义为“welcome-file”。
home.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" %>
Welcome
Login
Register
在/ src / main / webapp / jsp下创建：
register.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" %>
Registration
Username
Password
FirstName
LastName
Email
Address
Phone
Register
Home
login.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" %>
Login
Username:
Password:
Login
Home
${message}
welcome.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" %>
Welcome
Welcome ${firstname}
Home
步骤10：运行应用程序
-
右键单击应用程序，然后Maven-> clean。
-
右键单击应用程序，然后单击Maven-> install。
-
右键单击应用程序并运行As->在服务器上运行 - >使用Tomcat运行。
您将看到以下输出。
主页：
用户注册：
用户注册成功：
登录：
登录成功：
概要
本教程有助于为Spring MVC创建一个Maven项目，并为用户注册和登录开发一个小应用程序。