使用IDEA利用Maven创建SSM项目并且实现简单的注册功能

一、创建一个maven项目：

（1）、首先按照下图所示创建好，第三点一定要注意不要选错

（2）、填写GroupId 和 ArtifactId(可以自行百度分别是什么意思)然后点击 下一步

（3）、如图所示，更改自己的仓库地址

（4）、设置自己的项目名，点击“完成”，这样一个maven项目就建立完成了，静静地等待一段时间。。

 

二、引入Spring的相关配置文件

鼠标右键点击项目名的位置，如下图：

选择Add Framework Support,弹出如下页面：并按照顺序勾选上对勾，点击完成，静静等待一段时间。

形成了两个带叶子的xml文件，如下图：

三、.接下来就是创建目录结构

选择 File-->Project Structure ->Module 

然后点击src，在src->main下创建test文件夹（用于存放单元测试类），然后在main中创建java文件夹，resource文件夹。

因为IDEA不能自动识别各个文件所属的类别，必须由我们手动去选择。创建结果如下：

1.在java文件夹下面创建一个com的包。

2.在pom.xml中引入依赖：

[code]<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>Demo</groupId>
<artifactId>Demo</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>

<name>Demo Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>

<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.14.RELEASE</version>
</dependency>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<ve
1fff8
rsion>4.3.8.RELEASE</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>4.3.8.RELEASE</version>
</dependency>

<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper</artifactId>
<version>4.0.0</version>
</dependency>
</dependencies>

<build>
<finalName>Demo</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

3.按照如下结构创建包，和调整两个xml文件的位置。

 

四、现在开始进行具体的实现类的编写

创建类，如下图：

在com包下面的子包中创建一个相应的类，值得注意的是：不要忘记在resource下面的mapper 下面创建UserMapper.xml

创建xml文件的步骤：

1.找到下图中红色框框圈出来的内容：

2.勾选上红色框框里面的内容，输入文件名，点击OK 就可以创建好了

下面对创建的类 进行具体的编码：

1.entity下的User.java

[code]package com.entity;

public class User {
private Integer id;

private String username;

private String password;

public Integer getId() {
return id;
}

public void setId(Integer id) {
this.id = id;
}

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;
}
}

2.mapper文件夹下的mapper接口和其配置文件

[code]package com.mapper;

import com.entity.User;

public interface UserMapper {
void insertUser(User user);
}

配置文件（resource下面的mapper下的UserMapper.xml）如下：

值得注意的是：insert里面的id 要与接口文件中对应的方法名是一样的。

[code]<?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.mapper.UserMapper">
<resultMap id="UserResult" type="com.entity.User">
<id property="id" column="id"/>
<result column="username" property="username"/>
<result column="password" property="password"/>
</resultMap>

<insert id="insertUser" parameterType="com.entity.User" useGeneratedKeys="true" keyProperty="id">
INSERT INTO user(username,password) VALUES (#{username},#{password})
</insert>
</mapper>

3.service包下面的UserService

[code]package com.service;

import com.entity.User;
import com.mapper.UserMapper;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service
public class UserService {

@Resource
private UserMapper userMapper;
public void insertUser(User user){
userMapper.insertUser(user);
}
}

4.controller包下面的UserController

[code]package com.controller;

import com.entity.User;
import com.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
public class UserController {
@Autowired
private UserService userService;

@RequestMapping("/register")
public String upload(User user, Model model){
userService.insertUser(user);
model.addAttribute("user", user);
return "redirect:success.jsp";
}
}

5.编辑前端页面的form表单

[code]<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html" charset="UTF-8">
<title>注册页面</title>
</head>
<body>
<form action="/register" method="post">
<label>用户名：</label><input type="text" name="username"><br>
<label>密码：</label><input type="password" name="password"><br>
<input type="submit" value="注册"/>
</form>

</body>
</html>

同时在webapp下面创建一个success.jsp  用于注册成功进行跳转

6在就是编辑三个xml的内容了：

（1）.web.xml

由于我改变了位置，因此需要进行改动

改动如下：

[code]<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

下面是具体的内容：

 

[code]<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>

<!--下面是过滤器-->
<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>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:dispatcher-servlet.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>
</web-app>

2.applicationContext.xml

[code]<?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">

<context:component-scan base-package="com"/>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.mapper" />
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="typeAliasesPackage" value="com.entity" />
<property name="mapperLocations">
<array>
<value>classpath:mapper/UserMapper.xml</value>
</array>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/sun?serverTimezone=UTC" />
<property name="username" value="root" />
<property name="password" value="root" />
</bean>
</beans>

3.dispatcher-servlet.xml

值得注意的是，这里我进行了静态资源文件的配置。

在webapp中创建防止静态资源的文件夹，如下图所示：

如果不对静态资源进行配置，那么静态资源是在jsp页面中无法显示出来的。

下面是dispatcher-servlet.xml中的内容

[code]<?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:mvc="http://www.springframework.org/schema/mvc"
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">
<!--dispatcher-servlet.xml负责整个mvc中的配置-->
<!--启用spring的一些annotation -->
<context:annotation-config/>
<!-- 配置注解驱动 可以将request参数与绑定到controller参数上 -->
<mvc:annotation-driven/>
<!--静态资源映射-->
<!--本项目把静态资源放在了webapp的statics目录下，资源映射如下-->
<mvc:resources mapping="/css/**" location="/statics/css/"/>
<mvc:resources mapping="/js/**" location="/statics/js/"/>
<mvc:resources mapping="/image/**" location="/statics/image/"/>
<mvc:default-servlet-handler />  <!--这句要加上，要不然可能会访问不到静态资源，具体作用自行百度-->
<!-- 对模型视图名称的解析，即在模型视图名称添加前后缀(如果最后一个还是表示文件夹,则最后的斜杠不要漏了) 使用JSP-->
<!-- 默认的视图解析器 在上边的解析错误时使用 (默认使用html)- -->
<!--视图解析器-->
<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!--<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>-->
<property name="prefix" value="/views/"/><!--设置JSP文件的目录位置-->
<property name="suffix" value=".jsp"/>
<!--<property name="exposeContextBeansAsAttributes" value="true"/>-->
</bean>
<!-- 自动扫描装配-->
<context:component-scan base-package="com.controller"/>
</beans>

在文章的最后，附上数据库中的表的设计。如下图：

 

这样，一个简单的利用maven创建SSM（Spring+SpringMVC+Mybatis）实现注册的小例子就实现了。