Maven+SSM框架项目实例——IDEA

一、项目环境

• 开发系统：Window10
• 开发工具：IDEA
• JDK：1.8
• 框架：Maven+Spring+SpringMVC+Mybatis
• 数据库：Mysql

二、项目结构

项目文件架构： 

三、Maven配置

pom.xml

<properties>
        <!-- spring版本号 -->
        <spring.version>4.0.2.RELEASE</spring.version>
        <!-- mybatis版本号 -->
        <mybatis.version>3.2.6</mybatis.version>
        <!-- log4j日志文件管理包版本 -->
        <slf4j.version>1.7.7</slf4j.version>
        <log4j.version>1.2.17</log4j.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <!-- 表示开发的时候引入，发布的时候不会加载此包 -->
            <scope>test</scope>
        </dependency>
        <!-- spring核心包 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-oxm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- mybatis核心包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!-- mybatis/spring包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.2.2</version>
        </dependency>
        <!-- 导入java ee jar 包 -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>
        <!-- 导入Mysql数据库链接jar包 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.6</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>
        <!-- JSTL标签类 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- 日志文件管理包 -->
        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>

        <!-- 格式化对象，方便输出日志 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.1.41</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${slf4j.version}</version>
        </dependency>

        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>${slf4j.version}</version>
        </dependency>
        <!-- log end -->
        <!-- 映入JSON -->
        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.13</version>
        </dependency>
        <!-- 上传组件包 -->
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.9</version>
        </dependency>
        <!-- 导入Mysql数据库链接jar包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.30</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.3.1</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.4.2</version>
        </dependency>
    </dependencies>

四、SSM的配置文件

mybatis-config.xml

<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <settings>
        <setting name="cacheEnabled" value="true"/>
    </settings>
    <!-- 只需配置别名，其他的配置使用其他的方法进行配置 -->
    <typeAliases>
        <typeAlias type="com.model.entity.Student" alias="Student"/>
        <typeAlias type="com.model.entity.Teacher" alias="Teacher"/>
        <typeAlias type="com.model.entity.Classes" alias="Classes"/>
    </typeAliases>
</configuration>

spring-mybatis.xml:

<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-3.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <!-- 导入jdbc配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!-- 注解的扫描路径 -->
    <context:component-scan base-package="com.*"/>
    <!-- 连接池 -->
    <!-- 配置1个阿里连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"
          destroy-method="close">
        <property name="driverClassName">
            <value>${jdbc_driverClassName}</value>
        </property>
        <property name="url">
            <value>${jdbc_url}</value>
        </property>
        <property name="username">
            <value>${jdbc_username}</value>
        </property>
        <property name="password">
            <value>${jdbc_password}</value>
        </property>
        <!-- 连接池最大使用连接数 -->
        <property name="maxActive">
            <value>20</value>
        </property>
        <!-- 初始化连接大小 -->
        <property name="initialSize">
            <value>1</value>
        </property>
        <!-- 获取连接最大等待时间 -->
        <property name="maxWait">
            <value>60000</value>
        </property>
        <!-- 连接池最大空闲 -->
        <property name="maxIdle">
            <value>20</value>
        </property>
        <!-- 连接池最小空闲 -->
        <property name="minIdle">
            <value>3</value>
        </property>
        <!-- 自动清除无用连接 -->
        <property name="removeAbandoned">
            <value>true</value>
        </property>
        <!-- 清除无用连接的等待时间 -->
        <property name="removeAbandonedTimeout">
            <value>180</value>
        </property>
        <!-- 连接属性 -->
        <property name="connectionProperties">
            <value>clientEncoding=UTF-8</value>
        </property>
    </bean>

    <!-- mybatis的sessionfatory -->
    <bean id="sqlSessionFactory"
          class="org.mybatis.spring.SqlSessionFactoryBean"
          p:dataSource-ref="dataSource"
          p:configLocation="classpath:mybatis-config.xml"
          p:mapperLocations="classpath:/mapping/*.xml"/>

    <!-- dao的实现类对象，既mapper对象 。从上面的session工厂中，自动创建出所有mapper文件下的实现类对象 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"
          p:basePackage="com.model.dao"
          p:sqlSessionFactoryBeanName="sqlSessionFactory"/>

    <!-- 事务管理器，用于注解注入事务 -->
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
          p:dataSource-ref="dataSource"/>

</beans>

springmvc-servlet.xml:

<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-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 注解的扫描路径 -->
    <context:component-scan base-package="com.controller"/>
    <mvc:annotation-driven/>
    <!-- springmvc的视图解析器 -->
    <bean class="org.springframework.web.servlet.view.UrlBasedViewResolver">
        <property name="prefix" value="/WEB-INF/JSP/"></property>
        <property name="suffix" value=".jsp"></property>
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
    </bean>

</beans>

jdbc.properties:

jdbc_driverClassName=com.mysql.jdbc.Driver
jdbc_url=jdbc:mysql://localhost:3306/xxxx?characterEncoding=utf-8
jdbc_username=xxxx
jdbc_password=xxxx

五、数据库表

student表： 
 
classes表： 
 
teacher表： 

六、各层代码

实体类 
Classes：

package com.model.entity;

public class Classes {
    private int cid;
    private String cname;

    @Override
    public String toString() {
        return "Classes{" +
            "cid=" + cid +
            ", cname='" + cname + '\'' +
            '}';
    }

    public Classes() {
    }

    public Classes(int cid, String cname) {

        this.cid = cid;
        this.cname = cname;
    }

    public int getCid() {

        return cid;
    }

    public void setCid(int cid) {
        this.cid = cid;
    }

    public String getCname() {
        return cname;
    }

    public void setCname(String cname) {
        this.cname = cname;
    }
}

Student：

package com.model.entity;

public class Student {
    private int sid;//学号
    private String sname;//姓名
    private Classes classes;//所属班级
    private String sex;//性别
    private String birthplace;//出生地

    @Override
    public String toString() {
        return "Student{" +
            "sid=" + sid +
            ", sname='" + sname + '\'' +
            ", classes=" + classes +
            ", sex='" + sex + '\'' +
            ", birthplace='" + birthplace + '\'' +
            '}';
    }

    public Student() {
    }

    public Student(int sid, String sname, Classes classes, String sex, String birthplace) {

        this.sid = sid;
        this.sname = sname;
        this.classes = classes;
        this.sex = sex;
        this.birthplace = birthplace;
    }

    public int getSid() {

        return sid;
    }

    public void setSid(int sid) {
        this.sid = sid;
    }

    public String getSname() {
        return sname;
    }

    public void setSname(String sname) {
        this.sname = sname;
    }

    public Classes getClasses() {
        return classes;
    }

    public void setClasses(Classes classes) {
        this.classes = classes;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getBirthplace() {
        return birthplace;
    }

    public void setBirthplace(String birthplace) {
        this.birthplace = birthplace;
    }
}

Teacher：

package com.model.entity;

public class Teacher {
    private int tid;//教师编号
    private String tname;//姓名
    private Classes classes;//所教班级(student的cid外键)

    public Teacher() {
    }

    @Override
    public String toString() {
        return "Teacher{" +
            "tid=" + tid +
            ", tname='" + tname + '\'' +
            ", classes=" + classes +
            '}';
    }

    public Teacher(int tid, String tname, Classes classes) {
        this.tid = tid;
        this.tname = tname;
        this.classes = classes;
    }

    public int getTid() {

        return tid;
    }

    public void setTid(int tid) {
        this.tid = tid;
    }

    public String getTname() {
        return tname;
    }

    public void setTname(String tname) {
        this.tname = tname;
    }

    public Classes getClasses() {
        return classes;
    }

    public void setClasses(Classes classes) {
        this.classes = classes;
    }
}

持久层（Dao类） 
StudentDao:

package com.model.dao;

import com.model.entity.Student;

import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface StudentDao {

    public List<Student> findAll();//查找所有学生

    public void add(@Param("sname") String sname, @Param("cid") int cid,
                    @Param("sex") String sex, @Param("birthplace") String birthplace);//添加学生

    public Student findBySid(int sid);//根据学号查学生

}

package com.model.dao;

import com.model.entity.Student;

import org.apache.ibatis.annotations.Param;

import java.util.List;

public interface StudentDao {

    public List<Student> findAll();//查找所有学生

    public void add(@Param("sname") String sname, @Param("cid") int cid,
                    @Param("sex") String sex, @Param("birthplace") String birthplace);//添加学生

    public Student findBySid(int sid);//根据学号查学生

}

业务层（Service类） 
StudentService：

import com.model.entity.Student;

import java.util.List;

public interface StudentService {
    public List<Student> findAll();

    public void add(String sname, int cid, String sex, String birthplace);//添加学生

    public Student findBySid(int sid);//根据学号查学生
}

StudentServiceImpl：

package com.service.Impl;

import com.model.dao.StudentDao;
import com.model.entity.Student;
import com.model.service.StudentService;

import org.springframework.stereotype.Service;

import java.util.List;

import javax.annotation.Resource;

@Service
public class StudentServiceImpl implements StudentService {

    //这里的自动装配会报错，可以忽视，因为在spring-mybatis.xml中有进行配置，通过mapper映射从Session工厂中获取
    @Resource
    private StudentDao studentDao;

    public List<Student> findAll() {
        return studentDao.findAll();
    }

    public void add(String sname, int cid, String sex, String birthplace) {

    }

    public Student findBySid(int sid) {
        return studentDao.findBySid(sid);
    }
}

控制器（Controller） 
StudentAction：

package com.controller;

import com.model.entity.Student;
import com.model.service.StudentService;

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 org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class StudentAction {

    @Autowired
    private StudentService service;//持有一个业务层对象

    @RequestMapping("/findall")
    public String findAll(Model model) {
        List<Student> list = service.findAll();
        model.addAttribute("studentlist", list);
        return "show";
    }

    //ajax查询数据
    @ResponseBody
    @RequestMapping("/findbysid")
    public Student findBySid(@RequestParam("sid") int sid) {
        return service.findBySid(sid);
    }
}

package com.controller;

import com.model.entity.Student;
import com.model.service.StudentService;

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 org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
public class StudentAction {

    @Autowired
    private StudentService service;//持有一个业务层对象

    @RequestMapping("/findall")
    public String findAll(Model model) {
        List<Student> list = service.findAll();
        model.addAttribute("studentlist", list);
        return "show";
    }

    //ajax查询数据
    @ResponseBody
    @RequestMapping("/findbysid")
    public Student findBySid(@RequestParam("sid") int sid) {
        return service.findBySid(sid);
    }
}

七、web.xml配置

<?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" id="WebApp_ID"
         version="2.5">
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mybatis.xml;
            classpath:springmvc-servlet.xml
        </param-value>
    </context-param>
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.properties</param-value>
    </context-param>
    <context-param>
        <param-name>log4jRefreshInterval</param-name>
        <param-value>6000</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <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>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>*.action</url-pattern>
    </servlet-mapping>
    <display-name>ssm_student</display-name>

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

八、JSP页面

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<script type="text/javascript" src="js/jquery-2.1.1.min.js"></script>

<script language="JavaScript">
    $(function () {
        $("#search").click(function () {
            $.ajax({
                       type: "post",
                       url: "findbysid.action",
                       data: $("#sid"),
                       dataType: "json",
                       success: function (data) {
                           var html = "";
                           html +=
                               "<td>" + data.sid + "</td><td>" + data.classes.cname + "</td><td>" + data.sname
                               + "</td><td>" + data.sex + "</td><td>" + data.birthplace + "</td>";
                           $("#student").html(html);
                       },
                       //null值不会被success回调函数捕获，因此可以通过error来实现该功能
                       error: function () {
                           alert("请输入正确的学号！");
                       }
                   })
        })
    })
</script>
<body>
<center>
    <div style="margin-top: 25px">
        请输入所要查询的学号:<input type="text" id="sid" name="sid"/><input id="search" style="margin-left: 10px" type="button" value="搜索"><br/>
    </div>
    <div style="margin-top: 50px">
        <table border="1">
            <tr>
                <td>学号</td>
                <td>班级</td>
                <td>姓名</td>
                <td>性别</td>
                <td>出生地</td>
            </tr>
            <tr id="student">

            </tr>
        </table>
    </div>
</center>
</body>
</html>

九、Tomcat测试

测试结果（成功）： 

输入1，没有对应学号，则弹出：