最简单易懂的Idea搭建SSM项目过程和配置(文末有demo哦)

一、新建maven项目

  File-> new -> project..

 (一) 1、选择maven;  2、选择jdk版本,我的是1.8.0_45;  3、勾选Create from archetype;  4、选择maven-archetype-webapp; 5、Next

 (二)1、创建项目名称;  2、项目包名; 3、Next;

 (三) 1、maven所在的路径;  2、maven的配置文件位置;  3、maven本地仓库地址;  4、Finish

   下面是创建好的maven项目架构:

 

二、添加Spring、SpringMVC和MyBatis框架支持

 (一)、添加pom文件依赖(在这儿添加了spring的依赖项和一些必须的依赖)

 <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>
    <spring.version>4.3.7.RELEASE</spring.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.7.7</version>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
      <version>1.1.1</version>
    </dependency>
    <!-- 实现slf4j接口并整合 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.1</version>
    </dependency>

    <!-- 2.数据库相关依赖 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>6.0.6</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.0.18</version>
    </dependency>

    <!-- 3.DAO层框架依赖:Mybatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.3.0</version>
    </dependency>
    <!-- Mybatis自身实现的spring整合依赖 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.3</version>
    </dependency>

    <!-- 导入dbcp的jar包,用来在applicationContext.xml中配置数据库 -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.2.2</version>
    </dependency>

    <!-- 4.servlet-web相关依赖 -->
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.5.0</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>

    <!-- 5.Spring依赖 -->
    <!-- 5.1Spring核心依赖 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 5.2Spring dao依赖 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 5.3Spring web依赖 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 5.4Spring test依赖:方便做单元测试和集成测试 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- 6.文件上传 -->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>1.3.2</version>
    </dependency>
    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.2.1</version>
    </dependency>

    <!-- 7.fastjson -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.35</version>
    </dependency>

  </dependencies>

  (注意1.0:因为依赖项中已经添加了Spring的依赖,咱们先到项目配置中删掉Spring,为下一步添加框架支持做准备)

  File --> Project Structore

 

 (二)、在项目名称上 右键 -->  Add Framework Support.. 

  (1)、勾选Spring  ;  (2)、勾选SpringMVC ;(3)、OK;

       (注意1.1 :此时如果没有SpringMVC的可能是插件没导入,去File-setting-plugins中下载需要的插件)

   此时项目中多了两个配置文件:applicationContext.xml和dispatcher-servlet.xml:

 (三)、完善项目结构:(我习惯把配置文件放在resources下)

  这是现在的目录:

  创建完成,给java,resources和test创建标记 File-->Project Structure

 (四)、配置文件web.xml、 appplicationContext.xml  和 dispatcher-servlet.xml 以及jdbc.properties

  (1)、web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <display-name>Archetype Created Web Application</display-name>
    <!--welcome pages-->
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
    <!---->
    <!--配置springmvc DispatcherServlet-->
    <servlet>
        <servlet-name>springMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <!--配置dispatcher.xml作为mvc的配置文件-->
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:dispatcher-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>springMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!--把applicationContext.xml加入到配置文件中-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

  (2)、appplicationContext.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"
       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/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
                http://www.springframework.org/schema/mvc
                http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <context:component-scan base-package="com.ssmDemo"/>
    <!-- mybatis中的  -->

    <!--加载properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置连接池-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <!-- 配置SqlSessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"></property>
        <!-- 注入别名配置 -->
        <property name="typeAliasesPackage" value="com.ssmDemo.pojo"></property>
        <!-- 映射资 源路径 -->
        <property name="mapperLocations" value="classpath*:mappers/*.xml"></property>
    </bean>

    <!-- 用于扫描mapper接口的配置(mapper解析器) -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.ssmDemo.dao"></property>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
    </bean>

    <!-- mybatis中的  -->


</beans>

  (3)、dispatcher-servlet.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: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">
    <!--此文件负责整个mvc中的配置-->

    <!--启用spring的一些annotation(注解) -->
    <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="/static/css/"/>
    <mvc:resources mapping="/js/**" location="/static/js/"/>
    <mvc:resources mapping="/image/**" location="/static/image/"/>

    <!-- 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)- -->
    <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/view/"/><!--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.ssmDemo.controller"/>

</beans>

  (4)、jdbc.properties

jdbc.username=root
jdbc.password=root
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm_demo?useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&useSSL=false&serverTimezone=UTC
jdbc.initPoolSize=5
jdbc.maxPoolSize=10

三、配置tomcat,测试项目启动

 (一)、添加tomcat并配置

 

 (二)、选择tomcat; 选择浏览器;  选择jdk; 其他的可以用默认,也可以自己配置; 最后点击ok

 

  (三)、启动tomcat,因为在web.xml中配置了启动页面是index.jsp,本来helloworld稳稳的出现,

  但是,tomcat启动报错:

   解决:把jdbc.properties配置文件第一行空着(原因可以自己去探究,并不是每次创建ssm项目都会这样)

  下面就是正常启动的hello world!

 

四、测试数据库连接和查询数据

 (一)、事实上,经过上述配置,tomcat成功启动,就表示数据库已经连接成功,接下来是要测试数据是否能查询到:

 这是数据库的一个基础表:

 (二)、写controller、service、dao三层的demo

  目前的目录结构:

 

 

 (三)、demo数据:

ExampleMapper.java:
package com.ssmDemo.dao;

import org.springframework.stereotype.Component;

@Component("exampleMapper")
public interface ExampleMapper {

    String findName(int id);
}
ExampleMapper.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.ssmDemo.dao.ExampleMapper" >

    <select id="findName" parameterType="int" resultType="string">
        select username from user where id = #{id}
    </select>
</mapper>
ExampleService.java:
package com.ssmDemo.service;

public interface ExampleService {

    String findName(int id);
}
ExampleServiceImpl.java:
package com.ssmDemo.service.impl;

import com.ssmDemo.dao.ExampleMapper;
import com.ssmDemo.service.ExampleService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;

@Service("exampleService")
public class ExampleServiceImpl implements ExampleService {

    @Resource(name = "exampleMapper")
    private ExampleMapper exampleMapper;

    @Override
    public String findName(int id) {
        return exampleMapper.findName(id);
    }

}
ExampleController.java:
package com.ssmDemo.controller;

import com.ssmDemo.service.ExampleService;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;

@Controller
@RequestMapping("/example")
public class ExampleContreller {

    @Resource(name = "exampleService")
    private ExampleService exampleService;

    @RequestMapping("/name")
    @ResponseBody
    public String demoData() {
        return exampleService.findName(1);
    }
}

 (四)、启动tomcat,输入urlhttp://localhost:8080/ssmDemo_war_exploded/example/name

 

 这是你要的demo

 

打完收工!

如果测试过程中有什么问题,欢迎下方评论,作者会及时解答!欢迎来稿···

 

posted @ 2020-03-30 11:27  江云风  阅读(2604)  评论(1编辑  收藏  举报
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