刚刚写出来的SSM登录注册案例，网上随便翻一下都有 ，本篇直接上手，使用Maven工程搭建一个简单的SSM框架实现简单的登录注册，验证重名功能。
链接：https://pan.baidu.com/s/1qJ8aN7rheZXWT2_O_uiBKg
提取码：6666
目录
项目结构图
持久层相关配置文件 applicationContext-dao.xml
applicationContext-service.xml
jdbc.properties
spring-mvc.xml
web.xml
1.先写一个User.java
2.写一个接口UserMapper.java
3.在写一个UserMapper.xml与之相关联
4.接下来就是Service层了，先写一个接口：UserService.java,内容与UserMapper.java 一样，这里就不再展示了。
5.然后写一个类实现UserService.java，代码比较简单，不做过多解释，大家不要忘了要给给它标记@Service
UserController.java
登录页面 log.jsp
登录成功和失败页面 logok.jsp 和 logno.jsp
最后就是注册页面了 reg.jsp
注册成功和失败页面 regok.jsp 和regno.jsp
在数据库中新建user表：
项目结构图
有几个主要的配置文件，先了解下每个配置文件的作用。
1. web.xml:当服务启动时首先会去加载web.xml这个资源文件，里面包括了对前端控制器、乱码问题等配置。
2.applicatonContext.xml : 一般配置数据源，事物，注解 等。
在这里我使用的是applicatonContext-*.xml的形式将DAO层、Service层、分开配置，这样便于管理
分别为applicatonContext-dao.xml、applicatonContext-service.xml、
分开配置时，需要在web.xml中配置上下文位置
3.springmvc.xml: 里面配置的是控制层的 ，如视图解析器静态资源、配置注解驱动 。
持久层相关配置文件 applicationContext-dao.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
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">
<!--引入属性文件-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!--数据源-->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<property name="driverClassName" value="${mysql.driver}"/>
<property name="url" value="${mysql.url}"/>
<property name="username" value="${mysql.username}"/>
<property name="password" value="${mysql.password}"/>
</bean>
<!--创建SqlSessionFactory对象-->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!--数据源-->
<property name="dataSource" ref="dataSource"/>
<property name="typeAliasesPackage" value="com.sq.pojo"/>
</bean>
<!--扫描Dao包，创建动态代理对象, 会自动存储到spring IOC容器中-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--指定要扫描的dao的包-->
<property name="basePackage" value="com.sq.dao"/>
</bean>
</beans>
applicationContext-service.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
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">
<!--开启注解扫描, 扫描包-->
<context:component-scan base-package="com.sq.service"/>
</beans>
jdbc.properties
mysql.driver=com.mysql.cj.jdbc.Driver
mysql.url=jdbc:mysql://localhost:3306/mybatis?serverTimezone=UTC&characterEncoding=utf8&useUnicode=true&useSSL=false
mysql.username=root
mysql.password=root
spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<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/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 配置要扫描的包 -->
<context:component-scan base-package="com.sq.controller"/>
<!--静态资源代码块-->
<!--<mvc:resources mapping="/statics/**" location="/statics/"/>-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"/>
<property name="suffix" value=".jsp"/>
</bean>
<!-- 配置注解驱动 -->
<mvc:annotation-driven/>
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<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">
<!-- 配置 Spring MVC 的前端控制器 -->
<welcome-file-list>
<!--欢迎页面 项目运行之后 没有指定路径的情况 会跳转-->
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<!--配置文件加载-->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:application-*.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<servlet>
<!--servlet-name 名称-->
<servlet-name>DispatcherServlet</servlet-name>
<!--路径 class-->
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<!-- 配置初始化参数，用于读取 Spring MVC 的配置文件 -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<!-- 应用加载时创建 优先级别 1最高级别-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>/</url-pattern> <!--路径 什么情况下会开启-->
</servlet-mapping>
<filter>
<filter-name>CharacterEncodingFilter</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>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>配置文件写好了，接下来就开始写代码
先从实体类开始写：文章来源：https://www.toymoban.com/news/detail-401024.html
1.先写一个User.java
package com.sq.pojo;
public class User {
private String username;
private String userpwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getUserpwd() {
return userpwd;
}
public void setUserpwd(String userpwd) {
this.userpwd = userpwd;
}
@Override
public String toString() {
return "User [username=" + username + ", userpwd=" + userpwd + "]";
}
}
2.写一个接口UserMapper.java
package com.sq.dao;
import com.sq.pojo.User;
public interface UserMapper {
//用户登录
User findOne(User user);
//用户注册
int addOne(User user);
//注册时的重名检测
User checkReg(String username);
}
3.在写一个UserMapper.xml与之相关联
<?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.sq.dao.UserMapper">
<select id="findOne" parameterType="User" resultType="User">
SELECT * FROM user where username=#{username} and userpwd=#{userpwd}
</select>
<insert id="addOne" parameterType="User" >
insert into user(username,userpwd) values(#{username},#{userpwd})
</insert>
<select id="checkReg" resultType="User">
select * from user where username=#{username}
</select>
</mapper>
4.接下来就是Service层了，先写一个接口：UserService.java,内容与UserMapper.java一样，这里就不再展示了。
5.然后写一个类实现UserService.java，代码比较简单，不做过多解释，大家不要忘了要给给它标记@Service
package com.sq.service.Impl;
import com.sq.service.UserService;
import org.springframework.stereotype.Service;
import com.sq.dao.UserMapper;
import com.sq.pojo.User;
import javax.annotation.Resource;
@Service
public class UserServiceImpl implements UserService {
@Resource
private UserMapper userMapper;
@Override
public User findOne(User user) {
return userMapper.findOne(user);
}
@Override
public int addOne(User user) {
return userMapper.addOne(user);
}
@Override
public User checkReg(String username) {
return userMapper.checkReg(username);
}
}
6.最后就是Controller层了，Controller层的代码主要是调用Service层实现的方法，实现一些操作，并与前端进行交互。文章来源地址https://www.toymoban.com/news/detail-401024.html
UserController.java
package com.sq.controller;
import com.sq.pojo.User;
import com.sq.service.UserService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import javax.annotation.Resource;
@Controller
public class UserController {
@Resource
private UserService userService;
@RequestMapping("/golog")
public String log(User user, Model model) {
User u = userService.findOne(user);
model.addAttribute("user", u);
if (u != null) {
return "logok";
} else
return "logno";
}
@RequestMapping("/goreg")
public String reg(User user) {
User u = userService.checkReg(user.getUsername());
if (u == null) {
userService.addOne(user);
return "regok";
}
return "regno";
}
}
登录页面 log.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户登录</title>
<style type="text/css">
div {
width: 300px;
height: 200px;
margin-left: auto;
margin-right: auto;
}
</style>
</head>
<body>
<div>
<form action="golog" method="post">
<table border="1">
<tr>
<td>用户名:</td>
<td><input type="text" name="username"></td>
</tr>
<tr>
<td>密 码:</td>
<td><input type="password" name="userpwd"></td>
</tr>
<tr>
<td colspan="2" style="text-align: center;"><input
type="submit" value="登录"></td>
</tr>
<tr>
<td colspan="2" style="text-align: center;"><a
href="http://localhost:8080/SpringMvc12_war/reg">还没有账号？点此注册</a></td>
</tr>
</table>
</form>
</div>
</body>
</html>
登录成功和失败页面 logok.jsp 和 logno.jsp
<!-- logok.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body >
<h1>如果你能看见我，说明你成功了</h1>
<hr>
您的用户名是:${user.username}<br>
您的密码是:${user.userpwd}<br>
</body>
</html>
<!-- logno.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>用户名或者密码错误</h1>
</body>
</html>
最后就是注册页面了 reg.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户注册</title>
<style type="text/css">
div {
width: 300px;
height: 200px;
margin-left: auto;
margin-right: auto;
}
</style>
</head>
<body>
<div>
<form action="goreg" method="post">
<table border="1">
<tr>
<td>用户名:</td>
<td><input type="text" name="username" ></td>
</tr>
<tr>
<td>密 码:</td>
<td><input type="password" name="userpwd" ></td>
</tr>
<tr>
<td colspan="2" style="text-align: center;"><input type="submit" value="注册"></td>
</tr>
</table>
</form>
</div>
</body>
</html>
注册成功和失败页面 regok.jsp 和regno.jsp
<!-- regok.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body >
<h1>注册成功如果你能看见我，说明你成功了</h1><br>
<a href="log">点此返回登录界面</a>
</body>
</html>
<!-- regno.jsp -->
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>该用户名已被注册</h1>
</body>
</html>
到了这里，关于SSM框架实现登录注册功能的文章就介绍完了。如果您还想了解更多内容，请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章，希望大家以后多多支持TOY模板网！
