SSM整合基本架构：第二篇

一. 项目准备

1.1-需求

实现对订单的查询（根据id查询）和更改

1.2-数据库脚本

CREATE DATABASE IF NOT EXISTS ssm;
DROP TABLE IF EXISTS `items`;
CREATE TABLE `items` (
  `id` INT(10) NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(20) DEFAULT NULL,
  `price` FLOAT(10,0) DEFAULT NULL,
  `pic` VARCHAR(40) DEFAULT NULL,
  `createTime` DATETIME DEFAULT NULL,
  `detail` VARCHAR(200) DEFAULT NULL,
  PRIMARY KEY  (`id`)
) ENGINE=INNODB AUTO_INCREMENT=9 DEFAULT CHARSET=utf8;
INSERT INTO `items` VALUES ('1', '华为P30手机', '1000', NULL, '2018-03-13 09:29:30', '国货杠杠的');
SELECT * FROM items;

UPDATE items SET NAME='华为Mate30',price=9999,pic=NULL,createTime='2018-03-13 09:29:30',detail='杠杠的' WHERE id=1;

1.3-项目结构

1.4-Maven依赖

pom.xml文件中添加依赖

<?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>cn.lpl666</groupId>
    <artifactId>MavenPro_SSM_Basic</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>

    <name>MavenPro_SSM_Basic 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>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <spring.version>5.0.5.RELEASE</spring.version>
        <springmvc.version>5.0.5.RELEASE</springmvc.version>
        <myatis.version>3.4.5</myatis.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
    </properties>
    <!--【锁定jar版本】-->
    <dependencyManagement>
        <dependencies>
            <!--Mybatis-->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${myatis.version}</version>
            </dependency>
            <!--SpringMVC-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${springmvc.version}</version>
            </dependency>
            <!--Spring-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-web</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-expression</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aspects</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-test</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-tx</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <!--【Log】-->
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>${log4j.version}</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>
        </dependencies>
    </dependencyManagement>
    <!--【引入依赖】-->
    <dependencies>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
        </dependency>
        <!--mybatis-spring-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.26</version>
        </dependency>
        <!--druid-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.0.9</version>
        </dependency>
        <!--springMVC核心-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
        </dependency>
        <!--spring相关-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
        </dependency>
        <!--servlet-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <!--jsp-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
        </dependency>
        <!--jstl-->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>
        <!--【Log】-->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </dependency>

    </dependencies>
    <!--【build】-->
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <target>1.8</target>
                    <source>1.8</source>
                    <encoding>utf-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

二. Java源代码

2.1-pojo-实体类

package cn.lpl666.pojo;

import java.util.Date;

public class Items {
  private int id;
  private String name;
  private float price;
  private String pic;
  private String createTime;
  private String detail;

  public int getId() {
    return id;
  }

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

  public String getName() {
    return name;
  }

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

  public float getPrice() {
    return price;
  }

  public void setPrice(float price) {
    this.price = price;
  }

  public String getPic() {
    return pic;
  }

  public void setPic(String pic) {
    this.pic = pic;
  }

  public String getCreateTime() {
    return createTime;
  }

  public void setCreateTime(String createTime) {
    this.createTime = createTime;
  }

  public String getDetail() {
    return detail;
  }

  public void setDetail(String detail) {
    this.detail = detail;
  }

  @Override
  public String toString() {
    return "Items{" +
            "id=" + id +
            ", name='" + name + '\'' +
            ", price=" + price +
            ", pic='" + pic + '\'' +
            ", createTime=" + createTime +
            ", detail='" + detail + '\'' +
            '}';
  }
}

2.2-dao-持久层

接口

package cn.lpl666.dao;

import cn.lpl666.pojo.Items;
import org.springframework.stereotype.Repository;

@Repository
public interface ItemsMapper {
  /**
   * 根据id查找指定的订单项
   * @param id
   * @return
   */
  Items findOne(int id);

  /**
   * 更新订单
   * @param items
   */
  void update(Items items);
}

2.3-service-服务层

接口

package cn.lpl666.service;

import cn.lpl666.pojo.Items;

public interface ItemsService {
  /**
   * 根据id查找指定的订单项
   * @param id
   * @return
   */
  Items findOne(int id);

  /**
   * 更新订单
   * @param items
   */
  void update(Items items);
}

实现类

package cn.lpl666.service.impl;

import cn.lpl666.dao.ItemsMapper;
import cn.lpl666.pojo.Items;
import cn.lpl666.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
@Transactional   // 事务注解
public class ItemsServiceImpl implements ItemsService {
  @Autowired
  private ItemsMapper itemsMapper = null;
  @Override
  public Items findOne(int id) {
    return itemsMapper.findOne(id);
  }

  @Override
  public void update(Items items) {
    itemsMapper.update(items);
  }
}

2.4-controller-控制器

package cn.lpl666.controller;
import cn.lpl666.pojo.Items;
import cn.lpl666.service.ItemsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("items")
public class ItemsController {
  @Autowired
  private ItemsService itemsService;
  @RequestMapping("showItems/{id}")
  public String findOne(@PathVariable int id, Model model){
    Items item = itemsService.findOne(id);
    model.addAttribute("item",item);
    return "item";
  }
}

三. Resources配置资源

3.1-MySql数据库连接配置

配置文件：jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/ssm
jdbc.username=root
jdbc.password=root

3.2-日志相关配置

配置文件：log4j.properties

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=info, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

3.3-SpringMVC相关配置

配置文件：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.xsd">
    <!--配置spring创建容器时要扫描的包，只扫描controller控制器-->
    <context:component-scan base-package="cn.lpl666.controller"></context:component-scan>
    <!--配置视图解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--路径-->
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <!--文件-->
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!-- 设置静态资源不过滤 -->
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/images/" mapping="/images/**"/>
    <mvc:resources location="/js/" mapping="/js/**"/>
    <!--<mvc:default-servlet-handler/>-->
    <!--配置SpringMvc开启Mvc注解的支持-->
    <mvc:annotation-driven enable-matrix-variables="true"/>

</beans>

3.4-Spring核心配置

Spring整合dao层配置

配置文件：applicationContext-dao.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"
       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">
    <!-- 【加载数据库连接信息配置文件】 -->
    <context:property-placeholder location="classpath:jdbc.properties" />
    <!--【配置数据源信息，使用druid连接池】-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="${jdbc.driver}"></property>
        <property name="url" value="${jdbc.url}"></property>
        <property name="username" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>
    <!--【配置Spring整合Mybatis框架的SqlSessionFactoryBean】-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--Mybatis子配置返回值别名配置-->
        <property name="typeAliasesPackage" value="cn.lpl666.pojo"/>
        <!--数据源-->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--【配置 Mapper 扫描器，用于产生代理对象】 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.lpl666.dao"/>
    </bean>
</beans>

Spring整合service层配置

配置文件：applicationContext-service.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"
       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">
    <!--配置扫描器，扫描service-->
    <context:component-scan base-package="cn.lpl666.service"/>
    <!--配置事务管理器-->
    <bean id="transferManger" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
    <!--开启事务注解驱动-->
    <tx:annotation-driven transaction-manager="transferManger" />
</beans>

3.5-Mybatis操作Sql配置

配置包：cn.lpl666.dao

配置项：ItemsMapper.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="cn.lpl666.dao.ItemsMapper">
    <!--根据id查询订单-->
    <select id="findOne" parameterType="int" resultType="Items">
        select * from items where id=#{id}
    </select>
    <!--更新订单-->
    <update id="update" parameterType="Items">
        UPDATE items SET NAME=#{name},price=#{price},pic=#{pic},createTime=#{createTime},detail=#{detail} WHERE id=#{id};
    </update>
</mapper>

四. test测试

测试文件：MybatisTest.java , 测试业务层代码是否有效

import cn.lpl666.pojo.Items;
import cn.lpl666.service.ItemsService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath:applicationContext-dao.xml","classpath:applicationContext-service.xml"})
public class MybatisTest {
  @Autowired
  private ItemsService itemsService;
  @Test
  public void test01(){
    Items items = itemsService.findOne(1);
    System.out.println(items);
  }
  @Test
  public void  test02(){
    Items items = itemsService.findOne(1);
    items.setPrice(99999);
    itemsService.update(items);
  }
}

五. Web

5.1-服务器启动后相关配置

配置文件：WEB-INF目录下的web.xml

<!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>
  <!-- 手动指定 spring 配置文件位置 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:applicationContext*.xml</param-value>
  </context-param>
  <!--【配置过滤器解决中文乱码问题】-->
  <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>
  <!-- 【配置 spring 提供的监听器，用于启动服务时加载容器 。
该间监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件】 -->
  <listener>
    <listener-class>
      org.springframework.web.context.ContextLoaderListener
    </listener-class>
  </listener>
  <!--【配置核心控制器】-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--配置servlet初始化参数，调用springMvc配置文件，创建spring容器-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <!--请求项目中任何路径都会经过DispatcherServlet核心控制器-->
    <url-pattern>/</url-pattern>
  </servlet-mapping>

</web-app>

5.2-首页JSP页面

页面文件：index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
    <head>
        <title>Title</title>
    </head>
    <body>
        <a href="items/showItems/1">查询id为1的订单</a>
    </body>
</html>

5.3-订单项展示页

页面文件：items.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>订单项</h1>
    ${item}
</body>
</html>

5.4-SSM整合基本架构源码下载

https://gitee.com/lpl666/SSM.git

code/SSM2

来源：oschina

链接：https://my.oschina.net/lpl666/blog/3185176