天猫SSM项目学习记录(一）----第一个相对完整的SSM项目

来源:  http://how2j.cn/k/tmall_ssm/tmall_ssm-1516/1516.html?p=78908

目的：记录一个相对完整的SSM项目模板

1、工具：idea2018商业版（社区版无法识别webapp目录？ 原因见https://www.cnblogs.com/bityinjd/p/9284378.html）、mysql5.5.62

项目最终目录如下：

2、新建项目

new -> project -> maven， 勾选create from archetype， 选择org.apache.maven.archetypes:maven-archetype-webapp， Next

GroupId填写com.how2java.tmall，ArtifactId:填写tmall_ssm， 一路next下去，最后点击finish，等待创建项目完成，

然后在src/main路径下添加java、resources目录，并分别标记为Sources Root和Resources Root目录，

创建的项目目录结构如下：

3、修改pom.xml，添加jar包

<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.how2java.tmall</groupId>
  <artifactId>tmall_ssm</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>

  <properties>
    <spring.version>4.1.3.RELEASE</spring.version>
    <pagehelper.version>5.1.2-beta</pagehelper.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.spring.version>1.2.3</mybatis.spring.version>
    <mybatis.version>3.1.1</mybatis.version>
    <junit.version>4.12</junit.version>
    <jstl.version>1.2</jstl.version>
    <jsqlparser.version>1.0</jsqlparser.version>
    <jackson.version>1.2.7</jackson.version>
    <servlet-api.version>3.1.0</servlet-api.version>
    <druid.version>1.0.18</druid.version>
    <log4j.version>1.2.16</log4j.version>
    <commons-logging.version>1.2</commons-logging.version>
    <commons-fileupload.version>1.2.1</commons-fileupload.version>
    <commons-io.version>1.3.2</commons-io.version>
    <commons-lang.version>2.6</commons-lang.version>
    <aopalliance.version>1.0</aopalliance.version>
    <mybatis-generator.version>1.3.5</mybatis-generator.version>
  </properties>

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>${junit.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

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

    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>

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

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</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-webmvc</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-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- JSP相关 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>${jstl.version}</version>
    </dependency>

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>${servlet-api.version}</version>
      <scope>provided</scope>
    </dependency>

    <!-- pageHelper -->
    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>${pagehelper.version}</version>
    </dependency>

    <!--jsqlparser-->
    <dependency>
      <groupId>com.github.jsqlparser</groupId>
      <artifactId>jsqlparser</artifactId>
      <version>${jsqlparser.version}</version>
    </dependency>
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>${commons-logging.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>${commons-fileupload.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>${commons-io.version}</version>
    </dependency>

    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>${commons-lang.version}</version>
    </dependency>

    <dependency>
      <groupId>aopalliance</groupId>
      <artifactId>aopalliance</artifactId>
      <version>${aopalliance.version}</version>
    </dependency>

    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>${mybatis-generator.version}</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>${project.artifactId}</finalName>
    <plugins>
      <!-- 资源文件拷贝插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-resources-plugin</artifactId>
        <version>2.7</version>
        <configuration>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
      <!-- java编译插件 -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.2</version>
        <configuration>
          <source>1.8</source>
          <target>1.8</target>
          <encoding>UTF-8</encoding>
        </configuration>
      </plugin>
    </plugins>
    <pluginManagement>
      <plugins>
        <!-- 配置Tomcat插件 -->
        <plugin>
          <groupId>org.apache.tomcat.maven</groupId>
          <artifactId>tomcat7-maven-plugin</artifactId>
          <version>2.2</version>
        </plugin>
      </plugins>
    </pluginManagement>

    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
          <include>**/*.tld</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>

  </build>

</project>

4、选中java目录，右键-new，新建包com.how2java.tmall.pojo，创建Category.java，用以描述商品分类信息

package com.how2java.tmall.pojo;

public class Category {
    private Integer id;
    
    private String name;

    public Integer getId() {
        return id;
    }

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

 同样新建包com.how2java.tmall.mapper，新建接口CategoryMapper，操作sql增、删、改、查

package com.how2java.tmall.mapper;

import com.how2java.tmall.pojo.Category;

import java.util.List;

public interface CategoryMapper {

    List<Category> list();
}

新建com.how2java.tmall.service，新建接口CategoryService，用于实际业务，通过mapper层与数据库等建立连接

package com.how2java.tmall.service;

import com.how2java.tmall.pojo.Category;

import java.util.List;

public interface CategoryService {
    List<Category> list();
}

新建com.how2java.tmall.service.Impl包，创建CategoryServiceImpl类，实现CategoryService接口，

package com.how2java.tmall.service.Impl;

import com.how2java.tmall.mapper.CategoryMapper;
import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    CategoryMapper categoryMapper;

    public List<Category> list() {
        return categoryMapper.list();
    }
}

 在resources目录下新建mapper目录，该目录下创建CategoryMapper.xml，namespace必须是com.how2java.tmall.mapper.CategoryMapper,以和CategoryMapper保持一致。

<?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.how2java.tmall.mapper.CategoryMapper">
    <select id="list" resultType="Category">
        select * from category order by id desc
    </select>
</mapper>

5、开启日志

在resources目录下添加log4j.properties

# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
log4j.logger.com.how2java.tmall=TRACE
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

6、在resources目录下添加数据库连接参数配置文件jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/tmall_ssm?useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=admin

7、在resources目录下新建applicationContext.xml，启动对注解的识别、数据库参数引入、配置数据源等等，

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

    <context:annotation-config />
    <context:component-scan base-package="com.how2java.tmall.service" />

    <!-- 导入数据库配置文件 -->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!-- 配置数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <!-- 基本属性 url、user、password -->
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />

        <!-- 配置初始化大小、最小、最大 -->
        <property name="initialSize" value="1" />
        <property name="minIdle" value="1" />
        <property name="maxActive" value="20" />

        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="60000" />

        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000" />

        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="300000" />

        <property name="validationQuery" value="SELECT 1" />
        <property name="testWhileIdle" value="true" />
        <property name="testOnBorrow" value="false" />
        <property name="testOnReturn" value="false" />

        <!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
        <property name="poolPreparedStatements" value="true" />
        <property name="maxPoolPreparedStatementPerConnectionSize"
                  value="20" />
    </bean>

    <!--Mybatis的SessionFactory配置-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="typeAliasesPackage" value="com.how2java.tmall.pojo" />
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
        <!--分页插件，目前先注释，后面重构的时候才会使用
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageInterceptor">
                    <property name="properties">
                        <value>
                        </value>
                    </property>
                </bean>
            </array>
        </property>
        -->
    </bean>

    <!--Mybatis的Mapper文件识别-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.how2java.tmall.mapper"/>
    </bean>

</beans>

8、在resources目录下新建spring mvc配置文件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: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-3.2.xsd">

    <!--启动注解识别-->
    <context:annotation-config/>

    <context:component-scan base-package="com.how2java.tmall.controller">
        <context:include-filter type="annotation"
                                expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <mvc:annotation-driven />

    <!--开通静态资源的访问-->
    <mvc:default-servlet-handler />

    <!-- 视图定位 -->
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"
                  value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <!-- 对上传文件的解析-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
</beans>

9、修改web.xml，指定spring配置文件、设置中文编码、指定spring mvc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">

  <!-- spring的配置文件-->
  <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>

  <!--中文过滤器-->
  <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>

  <!-- spring mvc核心：分发servlet -->
  <servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!-- spring mvc的配置文件 -->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springMVC.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

10、创建com.how2java.tmall.controller包，新建CategoryController类，响应请求

package com.how2java.tmall.controller;

import com.how2java.tmall.pojo.Category;
import com.how2java.tmall.service.CategoryService;
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.ResponseBody;

import java.util.List;

@Controller
@RequestMapping("")
public class CategoryController {
    @Autowired
    CategoryService categoryService;

    @RequestMapping("admin_category_list")
    public String list(Model model) {
        List<Category> cs = categoryService.list();
        model.addAttribute("cs", cs);
        return "admin/listCategory";
    }
}

11、junit测试，添加数据

创建java同级目录test，并标记为Test Sources Root，新建com.how2java.tmall包，新建CategoryTest类

package com.how2java.tmall;


import org.junit.Before;
import org.junit.Test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

public class CategoryTest {

    private Statement s;

    @Before
    public void init() throws Exception {
        try {
            Class.forName("com.mysql.jdbc.Driver");
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

        Connection c = DriverManager.getConnection("jdbc:mysql://localhost:3306/tmall_ssm?useUnicode=true&characterEncoding=utf8",
                "root", "admin");
        s = c.createStatement();
    }

    @Test
    public void insertData() throws Exception {
        for (int i = 1; i <=5 ; i++) {
            String sqlFormat = "insert into category values (null, '测试分类%d')";
            String sql = String.format(sqlFormat, i);
            s.execute(sql);
        }
    }
}

12、创建CategoryController类对应的视图

WEB-INF下创建jsp目录。 然后在jsp目录中创建admin目录，接着创建listCategory.jsp文件

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>商品分类</title>
    <style type="text/css">
        table
        {
            border-collapse:collapse;
            width:300px;
        }

        table, td, th
        {
            border:1px solid black;
        }
    </style>
</head>

<body>
<div>
    <table>
        <thead>
        <tr>
            <th>ID</th>
            <th>分类</th>
        </tr>
        </thead>
        <tbody>
        <c:forEach items="${cs}" var="c">

            <tr>
                <td>${c.id}</td>
                <td>${c.name}</td>
            </tr>
        </c:forEach>
        </tbody>
    </table>
</div>
</body>
</html>

13、配置tomcat并运行，在浏览器输入http://localhost:8080/admin_category_list访问页面