20 SSM三大框架的整合

1.SSM整合的相关概念

(1)整合说明：SSM整合可以使用多种方式，优先使用XML + 注解的方式
(2)整合的思路
　　1.先搭建整合的环境
　　2.先把Spring的配置搭建完成
　　3.再使用Spring整合SpringMVC框架
　　4.最后使用Spring整合MyBatis框架

2.SSM环境搭建

(1)利用骨架创建一个webapp的maven项目

(2)修改pom文件，引入坐标依赖

<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>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.version>3.4.5</mybatis.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.6.8</version>
    </dependency>

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

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

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

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>compile</scope>
    </dependency>

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

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <!-- log start -->
    <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>${slf4j.version}</version>
    </dependency>
    <!-- log end -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>

    </dependency>

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>

    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>

  </dependencies>

(3)完善项目目录结构，编写实体类

<1>domain包中编写Account.java

package lucky.domain;

import java.io.Serializable;

/**
 * 账户实体类
 */
public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double money;

    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;
    }

    public Double getMoney() {
        return money;
    }

    public void setMoney(Double money) {
        this.money = money;
    }

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

<2>dao包下编写AccountDao接口

package lucky.dao;

import lucky.domain.Account;

import java.util.List;

/**
 * 账户dao接口
 * 注意：mybatis框架会帮我们生成代理对象，我们不必再编写其实现类
 */
public interface AccountDao {
    /**
     * 查询所有账户信息
     * @return
     */
    public List<Account> findAll();

    /**
     * 保存账户信息
     * @param account
     */
    public void saveAccount(Account account);
}

<3>service包下创建AccountService.java接口及其实现类AccountServiceImpl.java

AccountService.java接口

package lucky.service;

import lucky.domain.Account;

import java.util.List;

public interface AccountService {
    /**
     * 查询所有账户信息
     * @return
     */
    public List<Account> findAll();

    /**
     * 保存账户信息
     * @param account
     */
    public void saveAccount(Account account);
}

AccountServiceImpl.java

package lucky.service.impl;

import lucky.domain.Account;
import lucky.service.AccountService;

import java.util.List;

public class AccountServiceImpl implements AccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层查询所有账户");
        return null;
    }

    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层：保存账户");
    }
}

(4)搭建和测试Spring的开发环境

<1>在ssm项目中的resources包下创建applicationContext.xml的配置文件，编写具体的配置信息。

<?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">

    <!--开启注解扫描,希望处理service和dao,controller不需要Spring框架去处理-->
    <context:component-scan base-package="lucky">
        <!--配置哪些注解不扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

</beans>

<2>对AccountServiceImpl.java文件添加spring注解

package lucky.service.impl;

import lucky.domain.Account;
import lucky.service.AccountService;
import org.springframework.stereotype.Service;

import java.util.List;

@Service("accountService")
public class AccountServiceImpl implements AccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("业务层查询所有账户");
        return null;
    }

    @Override
    public void saveAccount(Account account) {
        System.out.println("业务层：保存账户");
    }
}

<3>在ssm_web项目中编写测试方法，进行测试

package lucky.test;

import lucky.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring {
    @Test
    public void testRun1(){
        //加载配置文件
        ApplicationContext ac=new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        //根据AccountServiceImpl注解配置的id(accountService),获取对象
        AccountService accountService = (AccountService) ac.getBean("accountService");
        //调用方法
        accountService.findAll();
    }
}

20 SSM三大框架的整合

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