SSM实现简单登陆注册

时间 2020-08-10 标签 ssm 实现简单登陆注册

SSM实现简单登陆注册

重构了一下之前的SSM登陆注册案例，SSM的三大核心IOC，AOP，DI不用多说，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框架实现简单的登陆注册，验证重名功能，适合刚上手的朋友看看css

数据库就不贴了，俩字段，username和userpwd，指定username为主键html

项目结构图

web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://java.sun.com/xml/ns/javaee"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
	version="2.5">
	<display-name>LogAndReg</display-name>

	<!-- DispatcherServlet -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- 加载spring核配置文件及springmvc配置文件 -->
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:spring/*.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<!-- 配置编码过滤器   ps:tomcat8.0及之后的版本中，对于get请求所提交的参数会进行自动编码处理，而对于post请求没有进行编码处理-->
	<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>

springmvc.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:mvc="http://www.springframework.org/schema/mvc"
	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/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">
	<!-- 放行静态资源 -->
	<mvc:default-servlet-handler />
	<!-- 注解驱动,识别注解 -->
	<mvc:annotation-driven></mvc:annotation-driven>
	<!-- 扫描Controller层 -->
	<context:component-scan
		base-package="cn.gingost.controller"></context:component-scan>
	<!-- 配置视图解析器 -->
	<bean
		class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<!-- 前缀 -->
		<property name="prefix" value="/WEB-INF/jsp/" />
		<!-- 后缀 -->
		<property name="suffix" value=".jsp" />
	</bean>
</beans>

applicationContext.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"
	xmlns:aop="http://www.springframework.org/schema/aop" 
	xmlns:tx="http://www.springframework.org/schema/tx"
	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/aop http://www.springframework.org/schema/aop/spring-aop.xsd 
                        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
	<!-- 加载jdbc.properties配置文件 -->
	<context:property-placeholder
		location="classpath:jdbc.properties" />
	<!-- 扫描文件，使注解生效，注意，要先扫描service层 -->
	<context:component-scan
		base-package="cn.gingost.service"></context:component-scan>
	<!-- 配置数据源，用的是阿里的druid链接池 -->
	<bean id="dataSource"
		class="com.alibaba.druid.pool.DruidDataSource">
		<property name="driverClassName" value="${driver}"></property>
		<property name="url" value="${url}"></property>
		<property name="username" value="${user}"></property>
		<property name="password" value="${pwd}"></property>
		<!-- 初始化链接数 -->
		<property name="initialSize" value="${initialSize}"></property>
		<!-- 最大链接数 -->
		<property name="maxActive" value="${maxActive}"></property>
		<!-- 最小链接数 -->
		<property name="minIdle" value="${minIdle}"></property>
	</bean>
	<!-- 配置mybatis工厂，指定数据源 -->
	<bean id="sqlSessionFactory"
		class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<!-- 使用mapperLocations的方法指定mapper.xml映射文件位置，此方法不须要配置mybatis-config -->
		<property name="mapperLocations"
			value="classpath:mybatis/mapper/*.xml"></property>
	</bean>
	<!-- Mapper接口扫描 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="cn.gingost.dao"></property>
	</bean>
	<!-- 添加事务，通常都建议写上，可是本例过于简单，也能够不写-->
	<bean id="txManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>
	<!-- 开启事务注解,同上 -->
	<tx:annotation-driven
		transaction-manager="txManager" />
</beans>

PagesController

package cn.gingost.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;


/*
 * 页面跳转方法
 */
@Controller
public class PagesController {
	@RequestMapping("/{page}")
	public String pageTo(@PathVariable String page) {
		return page;
	}
}

UserController

package cn.gingost.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import cn.gingost.pojo.User;
import cn.gingost.service.UserService;

@Controller
public class UserController {
	@Autowired
	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";
	}
}

UserMapper

package cn.gingost.dao;

import cn.gingost.pojo.User;

public interface UserMapper {
	//用户登陆
	User findOne(User user);
	//用户注册
	void addOne(User user);
	//注册时的重名检测
	User checkReg(String username);
}

User

package cn.gingost.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 + "]";
	}

}

UserService

package cn.gingost.service;

import cn.gingost.pojo.User;


public interface UserService {
	User findOne(User user);
	void addOne(User user);
	User checkReg(String username);
}

UserServiceImpl

package cn.gingost.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import cn.gingost.dao.UserMapper;
import cn.gingost.pojo.User;
/*
 * Service层，本例过于简单，其实能够不写
 * 直接在Controller层中自动注入UserMapper usermapper
 * 使用userMapper对象直接调用方法便可
 */
@Service
public class UserServiceImpl implements UserService {
	@Autowired
	private UserMapper userMapper;

	@Override
	public User findOne(User user) {
		// TODO Auto-generated method stub
		return userMapper.findOne(user);
	}

	@Override
	public void addOne(User user) {
		userMapper.addOne(user);
		// TODO Auto-generated method stub

	}

	@Override
	public User checkReg(String username) {
		// TODO Auto-generated method stub
		return userMapper.checkReg(username);
	}

}

UserMapper.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="cn.gingost.dao.UserMapper">
	<select id="findOne" resultType="cn.gingost.pojo.User">
		select * from user where
		username=#{username} and userpwd=#{userpwd}
	</select>

	<update id="addOne">
		insert into user values(#{username},#{userpwd})
	</update>
	<select id="checkReg" resultType="cn.gingost.pojo.User">
		select * from user where username=#{username}
	</select>
</mapper>

jdbc.properties

一个具备注脚的文本。[^2]java

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/logandreg?useUnicode=true&characterEncoding=UTF8
user=root
pwd=root
maxActive=10
minIdle=5
initialSize=5

log.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>用户登陆</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&emsp;码:</td>
					<td><input type="password" name="userpwd"></td>
				</tr>
				<tr>
					<td colspan="2" style="text-align: center;"><input
						type="submit" value="登陆"></td>
				</tr>
				<tr>
					<td colspan="2" style="text-align: center;"><a
						href="http://localhost:8080/LogAndReg/reg">尚未帐号？点此注册</a></td>
				</tr>
			</table>
		</form>
	</div>
</body>
</html>

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&emsp;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>

验证的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>若是你能看见我，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>


<!-- 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>注册成功若是你能看见我，说明你成功了</h1><br>
<a href="log">点此返回登陆界面</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>

发布项目后，在浏览器地址栏中输入http://localhost:8080/LogAndReg/log进入登陆页面，便可开始验证工程
这里再也不展现演示结果mysql

有问题欢迎留言探讨
源码下载地址git