ssm整合

阳光穿透心脏的1/2处 2024-04-01 12:11 9阅读 0赞

## ssm整合 ##

## 一 先添加spring框架 ##

##### 1.创建一个maven项目 #####

##### 2.在pom.xml中添加spring jar包 #####

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

##### 3.创建基本mvc结构 #####

pojo层:

Items类

package com.test.pojo;
    
    import java.util.Date;
    
    public class Items {
           private int id;
           private String name;
           private float price;
           private String detail;
           private String pic;
           private Date createtime;
    
        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 getDetail() {
            return detail;
        }
    
        public void setDetail(String detail) {
            this.detail = detail;
        }
    
        public String getPic() {
            return pic;
        }
    
        public void setPic(String pic) {
            this.pic = pic;
        }
    
        public Date getCreatetime() {
            return createtime;
        }
    
        public void setCreatetime(Date createtime) {
            this.createtime = createtime;
        }
    
        @Override
        public String toString() {
            return "Items{" +
                    "id=" + id +
                    ", name='" + name + '\'' +
                    ", price=" + price +
                    ", detail='" + detail + '\'' +
                    ", pic='" + pic + '\'' +
                    ", createtime=" + createtime +
                    '}';
        }
    }

dao层

接口 IItemsDao

package com.test.dao;
    
    import com.test.pojo.Items;
    
    import java.util.List;
    
    public interface IItemsDao {
    
    
        public List<Items> selectItems();
    }

实现类 ItemsDao

package com.test.dao.impl;
    
    import com.test.dao.IItemsDao;
    import com.test.mapper.ItemsMapper;
    import com.test.pojo.Items;
    
    import org.springframework.stereotype.Component;
    
    import java.io.InputStream;
    import java.util.List;
    
    
    public class ItemsDao implements IItemsDao {
    
        public ItemsDao()
        {
    
        }
        public List<Items> selectItems()
        {
              return null;
        }
    }

service层

接口:IItemsService

package com.test.service;
    
    import com.test.pojo.Items;
    
    import java.util.List;
    
    public interface IItemsService {
    
        public List<Items> selectItems();
    }

实现类:ItemsService

package com.test.service.impl;
    
    import com.test.dao.IItemsDao;
    import com.test.mapper.ItemsMapper;
    import com.test.pojo.Items;
    import com.test.service.IItemsService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    
    public class ItemsService implements IItemsService {
    
        
        private IItemsDao itemsDao;
    
    
        public List<Items> selectItems()
        {
            return itemsDao.selectItems();
        }
    }

##### 4.创建spring的配置文件 #####

applicationContext-ioc.xml

5.在配置文件中添加注解扫描包

1.  在mvc各层中添加注解
    
        package com.test.dao.impl;
        
        import com.test.dao.IItemsDao;
        import com.test.mapper.ItemsMapper;
        import com.test.pojo.Items;
        
        import org.springframework.stereotype.Component;
        
        import java.io.InputStream;
        import java.util.List;
        
        @Component
        public class ItemsDao implements IItemsDao {
        
            public ItemsDao()
            {
        
            }
            public List<Items> selectItems()
            {
               return null;
            }
        }

@Service
    public class ItemsService implements IItemsService {
    
        @Autowired
        private IItemsDao itemsDao;   
        
    
    
        public List<Items> selectItems()
        {
            return itemsDao.selectItems();
        }
    }

## 二.在spring中引入mybatis ##

##### 1.导入mybatis jar包 #####

<dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.37</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.4.6</version>
    </dependency>
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    
     
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.17</version>
        </dependency>

##### 2.导入spring整合mybatis架包 #####

<dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.3.0</version>
        </dependency>
     <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>4.3.18.RELEASE</version>
      </dependency>

##### 3.创建mapper文件 #####

<?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.test.mapper.ItemsMapper">
    
        <select id="selectItems"  resultType="Items">
            select * from items;
        </select>
    
    </mapper>

##### 4.创建mapper文件的代理接口 #####

package com.test.mapper;
    
    import com.test.pojo.Items;
    
    import java.util.List;
    
    public interface ItemsMapper {
    
        public List<Items> selectItems();
    
    
    }

##### 5.创建mybatis配置文件 #####

mybatis.xml文件

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE configuration
            PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
            "http://mybatis.org/dtd/mybatis-3-config.dtd">
    <configuration>
    
        <settings>
               <setting name="logImpl" value="STDOUT_LOGGING" />
        </settings>
    
        
        <typeAliases>
            <package name="com.test.pojo"/>
        </typeAliases>
        <mappers>
    
            <mapper resource="com/test/mapper/ItemsMapper.xml"/>
        </mappers>
    
    </configuration>

##### 6. 创建db.properties文件 #####

jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf-8
    jdbc.username=root
    jdbc.password=123

##### 7. 修改applicationContext-ioc.xml文件 #####

将之前在mybatis文件中配置的数据源 交给spring来管理，并创建sqlSessionFactory对象

<?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/beans
       http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.0.xsd">
    
        
        <context:component-scan base-package="com.test" />
    
        
        <context:property-placeholder location="classpath:db.properties"></context:property-placeholder>
    
        
        <bean id="comboPooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${jdbc.driver}" />
            <property name="jdbcUrl" value="${jdbc.url}"/>
            <property name="user" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
        </bean>
    
        
        <bean id="sqlSessionfactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="comboPooledDataSource"/>
            <property name="configLocation" value="classpath:mybatis.xml"/>
        </bean>
    
    </beans>

##### 8.修改dao层 #####

package com.test.dao.impl;
    
    import com.test.dao.IItemsDao;
    import com.test.mapper.ItemsMapper;
    import com.test.pojo.Items;
    
    import org.apache.ibatis.session.SqlSession;
    import org.apache.ibatis.session.SqlSessionFactory;
    import org.apache.ibatis.session.SqlSessionFactoryBuilder;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    
    import java.io.InputStream;
    import java.util.List;
    
    @Component
    public class ItemsDao implements IItemsDao {
        
        @Autowired
        private SqlSessionFactory sqlSessionFactory;
    
        public ItemsDao()
        {
          
        }
    
        public List<Items> selectItems()
        {
            SqlSession sqlSession= sqlSessionFactory.openSession();
    
            ItemsMapper itemsMapper= sqlSession.getMapper(ItemsMapper.class);
    
            List<Items> itemsList= itemsMapper.selectItems();
    
            return itemsList;
        }
    }

##### 9.在pom.xml文件中添加mapper.xml文件的路径 #####

在build标签中添加

##### 10.测试 #####

@Test
    public void fun()
    {
        ClassPathXmlApplicationContext classPathXmlApplicationContext=new ClassPathXmlApplicationContext("/applicationContext-ioc.xml");
    
        IItemsService itemsService= classPathXmlApplicationContext.getBean("itemsService",IItemsService.class);
    
         System.out.println(itemsService.selectItems());
    }

## 三 给mapper接口创建代理，替代原dao层的功能 ##

1.在applicationContext-ioc.xml文件中 添加

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.test.mapper"/>
    </bean>

1.  修改service代码
    
    将之前的

@Autowired
       private IItemsDao itemsDao;

修改为

@Autowired
       private ItemsMapper itemsMapper;

完整代码如下

package com.test.service.impl;
    
    import com.test.dao.IItemsDao;
    import com.test.mapper.ItemsMapper;
    import com.test.pojo.Items;
    import com.test.service.IItemsService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Component;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    
    
    @Service
    public class ItemsService implements IItemsService {
    
    
        @Autowired
        private ItemsMapper itemsMapper;
    
        public List<Items> selectItems()
        {
            return itemsMapper.selectItems();
        }
    }

1.  原来的dao层可以删除
2.  测试代码不变

## 四.在spring中引入springmvc ##

#### 1.导入jar包 ####

<dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>4.3.18.RELEASE</version>
    </dependency>

#### 2.创建springmvc.xml的配置文件 ####

#### 3. 在web.xml 添加 DispatcherServlet ####

<servlet>
      <servlet-name>dispatcherServlet</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>
      
      <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
      <servlet-name>dispatcherServlet</servlet-name>
      <url-pattern>/</url-pattern>
    </servlet-mapping>

#### 4.在web.xml 添加 spring容器的加载监听器 ####

让springmvc中的DispatcherServlet帮我们启动spring的相关配置文件

配置在DispatcherServlet的前面

<context-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:applicationContext-ioc.xml</param-value>
    </context-param>
    
    
    
    <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

#### 5.创建控制层的类和方法 并加入注解 ####

package com.test.action;
    
    import com.test.pojo.Items;
    import com.test.service.IItemsService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    import java.util.List;
    
    @Controller
    @RequestMapping("/items")
    public class ItemsAction {
    
        @Autowired
        private IItemsService itemsService;
    
        public IItemsService getItemsService() {
            return itemsService;
        }
    
        public void setItemsService(IItemsService itemsService) {
            this.itemsService = itemsService;
        }
    
        @RequestMapping("/selectItemsList")
        public ModelAndView selectItemsList()
        {
              //调用service的查询方法  返回一个list
             List<Items> itemsList= itemsService.selectItems();
    
              //组装ModelAndView 对象
             ModelAndView modelAndView=new ModelAndView();
    
             modelAndView.addObject("itemsList",itemsList);
    
             modelAndView.setViewName("showItems");
    
              //将数据存入 request，并转发到 WEB-INF/showItems.jsp页面
             return modelAndView;
    
        }
    }

#### 6.创建视图页面 ####

根据之前配置的试图解析器中的前缀，需要将jsp文件创建在 WEB-INF文件夹下

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <%--
      Created by IntelliJ IDEA.
      User: Administrator
      Date: 2019\6\26 0026
      Time: 10:36
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    
    <c:forEach var="items" items="${itemsList}" >
        ${items.name}<br/>
    </c:forEach>
    
    </body>
    </html>

#### 7.执行 ####

http://localhost:8080/testssm/items/selectItemsList

## 五.相关配置文件附录: ##

#### 1.pom.xml ####

<?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>com.test</groupId>
      <artifactId>TestSSM</artifactId>
      <version>1.0-SNAPSHOT</version>
      <packaging>war</packaging>
    
      <name>TestSSM Maven Webapp</name>
      
      <url>http://www.example.com</url>
    
      <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>
      </properties>
    
      <dependencies>
        <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.11</version>
          <scope>test</scope>
        </dependency>
    
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
          <version>4.3.18.Release</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-core</artifactId>
          <version>4.3.18.Release</version>
        </dependency>
    
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
          <version>4.3.18.Release</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context-support</artifactId>
          <version>4.3.18.Release</version>
        </dependency>
    
        
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>javax.servlet-api</artifactId>
          <version>3.1.0</version>
          <scope>provided</scope>
        </dependency>
    
        
        <dependency>
          <groupId>javax.servlet.jsp</groupId>
          <artifactId>jsp-api</artifactId>
          <version>2.2</version>
          <scope>provided</scope>
        </dependency>
    
        
        <dependency>
          <groupId>javax.servlet</groupId>
          <artifactId>jstl</artifactId>
          <version>1.2</version>
        </dependency>
        <dependency>
          <groupId>taglibs</groupId>
          <artifactId>standard</artifactId>
          <version>1.1.2</version>
        </dependency>
    
        
        <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.37</version>
        </dependency>
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.4.6</version>
        </dependency>
        <dependency>
          <groupId>com.mchange</groupId>
          <artifactId>c3p0</artifactId>
          <version>0.9.5.2</version>
        </dependency>
    
        
        <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis-spring</artifactId>
          <version>1.3.0</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-jdbc</artifactId>
          <version>4.3.18.RELEASE</version>
        </dependency>
    
        
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.17</version>
        </dependency>
    
        
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-webmvc</artifactId>
          <version>4.3.18.RELEASE</version>
        </dependency>
        <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-web</artifactId>
          <version>4.3.18.RELEASE</version>
        </dependency>
    
    
    
    
      </dependencies>
    
      <build>
        <resources>
          <resource>
            <directory>src/main/java</directory>
            <includes>
              <include>**/*.xml</include>
            </includes>
          </resource>
        </resources>
    
        <finalName>TestSSM</finalName>
        <pluginManagement>
          <plugins>
            <plugin>
              <artifactId>maven-clean-plugin</artifactId>
              <version>3.1.0</version>
            </plugin>
            
            <plugin>
              <artifactId>maven-resources-plugin</artifactId>
              <version>3.0.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-compiler-plugin</artifactId>
              <version>3.8.0</version>
            </plugin>
            <plugin>
              <artifactId>maven-surefire-plugin</artifactId>
              <version>2.22.1</version>
            </plugin>
            <plugin>
              <artifactId>maven-war-plugin</artifactId>
              <version>3.2.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-install-plugin</artifactId>
              <version>2.5.2</version>
            </plugin>
            <plugin>
              <artifactId>maven-deploy-plugin</artifactId>
              <version>2.8.2</version>
            </plugin>
          </plugins>
        </pluginManagement>
      </build>
    </project>

#### 2.web.xml ####

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
    
    
    <display-name>Archetype Created Web Application</display-name>
    
      
      <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext-ioc.xml</param-value>
      </context-param>
    
      
      
      <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
      </listener>
    
      
      
      <servlet>
        <servlet-name>dispatcherServlet</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>
        
        <load-on-startup>1</load-on-startup>
      </servlet>
      
      <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
      </servlet-mapping>
      
      
      
      
    </web-app>

#### 3.db.properties ####

db.driverClass=com.mysql.jdbc.Driver
    db.url=jdbc:mysql://localhost:3306/ssm?characterEncoding=utf-8
    db.user=root
    db.password=123

#### 4.applicationContext-ioc.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"
           xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context-4.0.xsd
       http://www.springframework.org/schema/aop
       http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">
    
        
        <context:component-scan base-package="com.test" />
    
        
        <context:property-placeholder location="classpath:db.properties" />
    
       
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
              <property name="driverClass" value="${db.driverClass}" />
              <property name="jdbcUrl" value="${db.url}" />
              <property name="user" value="${db.user}" />
              <property name="password" value="${db.password}" />
        </bean>
    
        
         <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
             <property name="dataSource" ref="dataSource" />
             <property name="configLocation" value="classpath:mybatis.xml" />
         </bean>
    
        
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.test.mapper" />
        </bean>
    
    
    
    
    </beans>

#### 5.springmvc.xml ####