javaweb实现登录注册基于(spring mvc)
时间: 2023-10-11 18:05:36 浏览: 156
基于Spring MVC实现登录注册,具体步骤如下:
1. 创建Maven项目,并添加Spring MVC依赖。
2. 在web.xml中配置DispatcherServlet,并指定Spring MVC配置文件的位置。
3. 创建Controller类,并使用@Controller注解进行标记。
4. 在Controller类中编写处理登录注册请求的方法,并使用@RequestMapping注解进行标记,并指定请求的URL地址。
5. 在处理请求的方法中,调用Service层的方法进行业务逻辑处理,然后返回视图名称。
6. 在Spring MVC配置文件中配置视图解析器,将视图名称解析为实际的视图。
7. 创建Service层,并实现登录注册的业务逻辑。
8. 创建DAO层,并使用Hibernate等ORM框架实现数据的存储和查询。
9. 在Spring MVC配置文件中配置数据源和Hibernate等ORM框架。
10. 在JSP页面中编写登录注册表单,并指定表单的提交地址。
11. 在JSP页面中显示结果。
以上是基于Spring MVC实现登录注册的基本步骤,具体实现过程中还需要根据实际需求进行调整和完善。
相关问题
写一个javaweb实现登录注册基于(spring mvc,mysql,maven)的代码
很抱歉,作为AI语言模型,我无法提供完整的代码实现。但是我可以提供一个基于Spring MVC、MySQL和Maven的登录注册示例,供您参考学习。
首先,在pom.xml中添加以下依赖:
```
<dependencies>
<!-- Spring MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.8</version>
</dependency>
<!-- MySQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.25</version>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Servlet API -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
</dependencies>
```
接着,创建Spring MVC配置文件spring-servlet.xml,并添加以下配置:
```
<!-- 配置注解扫描 -->
<context:component-scan base-package="com.example.controller" />
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/test?useSSL=false&serverTimezone=UTC" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
<!-- 配置Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.example.entity" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL8Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">true</prop>
</props>
</property>
</bean>
<!-- 配置Hibernate事务管理器 -->
<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<!-- 开启事务注解 -->
<tx:annotation-driven />
```
然后,创建Controller类UserController.java,并添加以下代码:
```
@Controller
@RequestMapping("/")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "register", method = RequestMethod.GET)
public String showRegisterForm() {
return "register";
}
@RequestMapping(value = "register", method = RequestMethod.POST)
public String register(@RequestParam String username, @RequestParam String password, Model model) {
User user = new User();
user.setUsername(username);
user.setPassword(password);
if (userService.addUser(user)) {
model.addAttribute("message", "注册成功!");
return "login";
} else {
model.addAttribute("error", "注册失败,请重试!");
return "register";
}
}
@RequestMapping(value = "login", method = RequestMethod.GET)
public String showLoginForm() {
return "login";
}
@RequestMapping(value = "login", method = RequestMethod.POST)
public String login(@RequestParam String username, @RequestParam String password, Model model, HttpSession session) {
User user = userService.getUserByUsername(username);
if (user != null && user.getPassword().equals(password)) {
session.setAttribute("user", user);
return "redirect:/home";
} else {
model.addAttribute("error", "用户名或密码错误!");
return "login";
}
}
@RequestMapping("home")
public String home(HttpSession session, Model model) {
User user = (User) session.getAttribute("user");
if (user != null) {
model.addAttribute("username", user.getUsername());
return "home";
} else {
return "redirect:/login";
}
}
}
```
在上面的代码中,我们定义了四个请求处理方法,分别对应注册页面展示、注册请求处理、登录页面展示、登录请求处理。其中,@RequestMapping注解用于指定请求的URL地址,@RequestParam注解用于获取请求参数,Model用于向视图传递数据,HttpSession用于保存用户会话信息。
接着,创建Service层接口UserService.java,并添加以下代码:
```
public interface UserService {
boolean addUser(User user);
User getUserByUsername(String username);
}
```
创建Service实现类UserServiceImpl.java,并添加以下代码:
```
@Service
@Transactional
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public boolean addUser(User user) {
return userDao.addUser(user);
}
@Override
public User getUserByUsername(String username) {
return userDao.getUserByUsername(username);
}
}
```
在上面的代码中,我们使用了注解@Service和@Transactional,分别用于将UserServiceImpl类标记为Spring管理的Bean,以及开启事务支持。
最后,创建DAO层接口UserDao.java,并添加以下代码:
```
public interface UserDao {
boolean addUser(User user);
User getUserByUsername(String username);
}
```
创建DAO实现类UserDaoImpl.java,并添加以下代码:
```
@Repository
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
@Override
public boolean addUser(User user) {
Session session = sessionFactory.getCurrentSession();
try {
session.save(user);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
@Override
public User getUserByUsername(String username) {
Session session = sessionFactory.getCurrentSession();
try {
Query<User> query = session.createQuery("from User where username=:username", User.class);
query.setParameter("username", username);
return query.uniqueResult();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
```
在上面的代码中,我们使用了注解@Repository将UserDaoImpl类标记为Spring管理的Bean,并使用注解@Autowired将SessionFactory注入到UserDaoImpl中。在addUser方法中,我们使用Hibernate的API将User对象存储到数据库中;在getUserByUsername方法中,我们使用HQL语句查询数据库中的User对象。
最后,创建JSP页面register.jsp、login.jsp和home.jsp,分别对应注册页面、登录页面和主页。具体实现可以参考以下代码:
register.jsp:
```
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>注册</title>
</head>
<body>
<h1>注册</h1>
<c:if test="${not empty error}">
<p style="color: red;">${error}</p>
</c:if>
<c:if test="${not empty message}">
<p style="color: green;">${message}</p>
</c:if>
<form action="${pageContext.request.contextPath}/register" method="post">
<label>用户名:</label>
<input type="text" name="username" required>
<br>
<label>密码:</label>
<input type="password" name="password" required>
<br>
<input type="submit" value="注册">
</form>
<p><a href="${pageContext.request.contextPath}/login">已有账号?请登录</a></p>
</body>
</html>
```
login.jsp:
```
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>登录</title>
</head>
<body>
<h1>登录</h1>
<c:if test="${not empty error}">
<p style="color: red;">${error}</p>
</c:if>
<form action="${pageContext.request.contextPath}/login" method="post">
<label>用户名:</label>
<input type="text" name="username" required>
<br>
<label>密码:</label>
<input type="password" name="password" required>
<br>
<input type="submit" value="登录">
</form>
<p><a href="${pageContext.request.contextPath}/register">没有账号?请注册</a></p>
</body>
</html>
```
home.jsp:
```
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>主页</title>
</head>
<body>
<h1>欢迎,${username}!</h1>
<p><a href="${pageContext.request.contextPath}/logout">退出登录</a></p>
</body>
</html>
```
至此,基于Spring MVC、MySQL和Maven的登录注册示例代码就完成了。需要说明的是,以上代码仅供参考学习,具体实现还要根据实际需求进行调整和完善。
idea写一个javaweb实现登录注册基于(spring mvc,mysql,maven)的代码并且将项目完整结构写下来
好的,以下是一个基于 Spring MVC、MySQL 和 Maven 的简单登录注册系统的代码示例及其完整项目结构:
1. 项目结构
```
|- src/main/java
|- com.example.demo
|- controller
|- UserController.java
|- dao
|- UserDAO.java
|- model
|- User.java
|- service
|- UserService.java
|- UserServiceImpl.java
|- src/main/resources
|- application.properties
|- log4j.properties
|- src/main/webapp
|- WEB-INF
|- views
|- index.jsp
|- login.jsp
|- register.jsp
|- web.xml
|- index.jsp
|- login.jsp
|- register.jsp
|- pom.xml
```
2. 相关依赖和配置
pom.xml:
```xml
<dependencies>
<!-- Spring MVC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.6</version>
</dependency>
<!-- MySQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.23</version>
</dependency>
<!-- MyBatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.7</version>
</dependency>
<!-- MyBatis-Spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>2.0.6</version>
</dependency>
<!-- Spring JDBC -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.3.6</version>
</dependency>
<!-- Spring TX -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>5.3.6</version>
</dependency>
<!-- Spring Test -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.3.6</version>
</dependency>
<!-- Junit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
</dependencies>
```
application.properties:
```properties
# MySQL 数据库配置
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/user_db?useSSL=false&serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8
spring.datasource.username=root
spring.datasource.password=123456
# MyBatis 配置
mybatis.mapper-locations=classpath:mapper/*.xml
mybatis.type-aliases-package=com.example.demo.model
```
web.xml:
```xml
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<display-name>My Login App</display-name>
<!-- 配置 Spring MVC -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 编码过滤器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
```
spring-mvc.xml:
```xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- 开启注解扫描 -->
<context:component-scan base-package="com.example.demo"/>
<!-- 开启 Spring MVC 注解驱动 -->
<mvc:annotation-driven/>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="${spring.datasource.driver-class-name}"/>
<property name="url" value="${spring.datasource.url}"/>
<property name="username" value="${spring.datasource.username}"/>
<property name="password" value="${spring.datasource.password}"/>
</bean>
<!-- 配置 MyBatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="typeAliasesPackage" value="com.example.demo.model"/>
<property name="mapperLocations" value="classpath:mapper/*.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.example.demo.dao"/>
</bean>
<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>
```
3. 实体类
User.java:
```java
public class User {
private int id;
private String username;
private String password;
// getter 和 setter 略
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
}
```
4. DAO 层
UserDAO.java:
```java
public interface UserDAO {
User getUserById(int id);
User getUserByUsername(String username);
void addUser(User user);
}
```
UserDAO.xml:
```xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.example.demo.dao.UserDAO">
<resultMap id="userResultMap" type="com.example.demo.model.User">
<id column="id" property="id" jdbcType="INTEGER"/>
<result column="username" property="username" jdbcType="VARCHAR"/>
<result column="password" property="password" jdbcType="VARCHAR"/>
</resultMap>
<select id="getUserById" resultMap="userResultMap">
SELECT * FROM user WHERE id = #{id}
</select>
<select id="getUserByUsername" resultMap="userResultMap">
SELECT * FROM user WHERE username = #{username}
</select>
<insert id="addUser">
INSERT INTO user (username, password) VALUES (#{username}, #{password})
</insert>
</mapper>
```
5. Service 层
UserService.java:
```java
public interface UserService {
User getUserById(int id);
User getUserByUsername(String username);
void addUser(User user);
}
```
UserServiceImpl.java:
```java
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserDAO userDAO;
@Override
public User getUserById(int id) {
return userDAO.getUserById(id);
}
@Override
public User getUserByUsername(String username) {
return userDAO.getUserByUsername(username);
}
@Override
public void addUser(User user) {
userDAO.addUser(user);
}
}
```
6. Controller 层
UserController.java:
```java
@Controller
public class UserController {
@Autowired
private UserService userService;
@RequestMapping(value = "/")
public String index() {
return "index";
}
@RequestMapping(value = "/login", method = RequestMethod.GET)
public String login() {
return "login";
}
@RequestMapping(value = "/login", method = RequestMethod.POST)
public ModelAndView login(String username, String password) {
User user = userService.getUserByUsername(username);
if (user != null && user.getPassword().equals(password)) {
ModelAndView mav = new ModelAndView("index");
mav.addObject("user", user);
return mav;
} else {
return new ModelAndView("login", "error", "用户名或密码错误!");
}
}
@RequestMapping(value = "/register", method = RequestMethod.GET)
public String register() {
return "register";
}
@RequestMapping(value = "/register", method = RequestMethod.POST)
public ModelAndView register(User user) {
userService.addUser(user);
ModelAndView mav = new ModelAndView("index");
mav.addObject("user", user);
return mav;
}
}
```
7. 视图
index.jsp:
```jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>首页</title>
</head>
<body>
<h1>欢迎您,${user.username}!</h1>
</body>
</html>
```
login.jsp:
```jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>登录</title>
</head>
<body>
<form method="post" action="/login">
<label for="username">用户名:</label>
<input type="text" id="username" name="username"><br>
<label for="password">密码:</label>
<input type="password" id="password" name="password"><br>
<input type="submit" value="登录">
</form>
<p style="color: red">${error}</p>
</body>
</html>
```
register.jsp:
```jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>注册</title>
</head>
<body>
<form method="post" action="/register">
<label for="username">用户名:</label>
<input type="text" id="username" name="username"><br>
<label for="password">密码:</label>
<input type="password" id="password" name="password"><br>
<input type="submit" value="注册">
</form>
</body>
</html>
```
以上就是一个简单的基于 Spring MVC、MySQL 和 Maven 的登录注册系统的代码示例及其完整项目结构,希望能对你有所帮助。