spring、springmvc、mybatis整合搭建ssm项目（Eclipse+maven）

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#spring #spring mvc #mybatis #ssm

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本文详细介绍如何使用Spring、SpringMVC和MyBatis（SSM）搭建项目框架，并通过登录功能实例展示整个流程，包括配置文件编写、依赖管理、控制器和服务层实现等。

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1、创建maven项目

2、添加相关依赖包

配置pom.xml：

<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>com.danni</groupId>
    <artifactId>ssm-maven</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <!-- 固定spring版本号 -->
    <properties>
        <springframe.version>4.3.9.RELEASE</springframe.version>
    </properties>

    <dependencies>
        <!-- Spring 依赖 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>${springframe.version}</version>
        </dependency>
        <!-- Spring 依赖 -->


        <!-- DB 相关依赖 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.42</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.4</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.1.1</version>
        </dependency>
        <!-- DB 相关依赖 -->


        <!-- Jsp,Servlet 相关依赖 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.0.1</version>
            <!-- 提供范围 使用容器提供的jar -->
            <scope>provided</scope>
        </dependency>
        <!-- Jsp,Servlet 相关依赖 -->

    </dependencies>
</project>

3、配置web.xml

<?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>ssm-maven</display-name>

    <!-- application参数配置 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

    <!-- Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- SpringMvc核心 -->
    <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:springmvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>


    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>
</web-app>

4、配置spring核心配置文件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:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <!-- 组件自动扫描,对于添加了注解标签的 -->
    <context:component-scan base-package="com.danni.model"></context:component-scan>

    <!-- 引入jdbc配置文件 -->
    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath*:jdbc.properties</value>
            </list>
        </property>
    </bean>

    <!-- 数据源 -->
    <bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="driverClassName" value="${driver}"></property>
        <property name="url" value="${url}"></property>
        <property name="username" value="${username}"></property>
        <property name="password" value="${password}"></property>
    </bean>


    <!-- 配置 SessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- DAO接口所在包名，Spring会自动查找其下的类(修改这里的value值：你的dao所在包名) -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.danni.model.dao"></property>
    </bean>

    <!-- (事务管理) -->
    <bean id="transactionManager"
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
</beans>

jdbc.properties配置文件：

driver = com.mysql.jdbc.Driver
url = jdbc:mysql:///student?characterEncoding=utf-8
username = root
password = root

5、配置springmvc.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
    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-4.3.xsd">

    <!-- 注解驱动 如果开启了静态资源访问必须开启当前配置 -->
    <mvc:annotation-driven></mvc:annotation-driven>

    <!-- 当前com.jdcy.web.controller包中所有类，只要类上打上了@Controller注解，容器将自动将该类装配进去 -->
    <context:component-scan base-package="com.danni.web.controller"/>

    <!-- 配置访问前后缀（这样在写比如同一个文件夹views下的views/xxx.jsp页面就可以写成xxx了，很方便） -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!-- 开启静态资源访问 -->
    <mvc:resources location="/img/" mapping="/img/**"></mvc:resources>
    <mvc:resources location="/css/" mapping="/css/**"></mvc:resources>
    <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>

</beans>

6、通过mybatis插件自动生成dao接口及映射文件,entity实体类

参考这篇文章的方法：http://blog.youkuaiyun.com/qq_36748278/article/details/78208830

7、以登录为例让你理解ssm

我的项目结构如下：
这里写图片描述

（1）添加AdminsService.java接口

@Service        //注解表明这是个Service        
public interface AdminsService{
    public Admins login(Admins admins);
}

（2）添加AdminsServiceImpl.java实现类

@Service                //注解表明这是个Service        
@Transactional          //注解事务  
public class AdminsServiceImpl implements AdminsService{

    @Autowired          //这样就不用再设置get和set方法了
    private AdminsMapper AdminsMapper; 

    @Override
    public Admins login(Admins admins) {
        return AdminsMapper.login(admins);
    }
}

（3）添加对应的AdminsController.java

@Controller                         //注解表明这是个Controller             
@RequestMapping(value = "admin")    //处理请求地址映射的注解，可用于类或方法上。用于类上，表示类中的所有响应请求的方法都是以该地址作为父路径。
public class AdminsController {

    @Autowired
    private AdminsService adminsService;

    //在浏览器中可以通过admin/login来访问
    @RequestMapping(value = "login", method = RequestMethod.GET)
    public String toLogin() {
        return "login";
    }

    @RequestMapping(value = "login", method = RequestMethod.POST)
    public String dologin(@ModelAttribute Admins admins, HttpSession session) {     
        //@ModelAttribute :运用在参数上，会将客户端传递过来的参数按名称注入到指定对象中，并且会将这个对象自动加入ModelMap中，便于View层使用
        Admins admins2 = adminsService.login(admins);
        if(admins2 == null){
            return "login";
        }
        return "redirect:/emp/query";
    }
}

（4）添加对应login.jsp页面

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<base href="<%=basePath%>">
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Login</title>
<!-- Bootstrap -->
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="css/my.css" />
</head>
<body>
    <div class="container">
        <form class="form-signin" action="admin/login" method="post">
            <label for="account" class="sr-only">Account</label> 
            <!--注意这里的name值需要和你的entity类中的成员变量对应相同，不然获得不到的-->
            <input type="text" id="account" name="adminname" class="form-control" placeholder="账 号" required autofocus> 
            <label for="password" class="sr-only">Password</label> 
            <input type="password" id="password" name="adminpwd" class="form-control" placeholder="密 码" required>
            <button class="btn btn-lg btn-primary btn-block" type="submit">登录</button>
        </form>
    </div>
    <script src="js/jquery.js"></script>
    <script src="js/bootstrap.min.js"></script>
</body>
</html>

（5）在浏览器访问http://localhost:8080/ssm-maven/admin/login即可
这里写图片描述

（6）当需要传递参数需要这样操作：

//根据id查看
@RequestMapping(value="query/{id}",method=RequestMethod.GET)    //value后面跟你的参数，如果有多个参数可以这样value="query/{id}/{name}"
public ModelAndView queryByid(@PathVariable Integer id){        //参数需要用@PathVariable + 类型 + 参数名的形式
    Employee employee = employeeService.queryById(id);
    ModelAndView mv = new ModelAndView();             //视图解释器解析
    mv.addObject("employee", employee);
    mv.setViewName("detail");
    return mv;
}