(一)整合入门基础
前言:整合的思路
- 整合说明:SSM整合可以使用多种方式,咱们会选择XML + 注解的方式
- 整合的思路
- 先搭建整合的环境
- 先把Spring的配置搭建完成
- 再使用Spring整合SpringMVC框架
- 最后使用Spring整合MyBatis框架
一、搭建环境
创建数据库和表
create database ssm;
use ssm;
create table account(
id int primary key auto_increment,
name varchar(20),
money double
);
创建maven的工程导入依赖
(今天会使用到工程的聚合和拆分的概念,这个技术maven高级会讲)
- 创建ssm_parent父工程(打包方式选择pom,必须的)
- 创建ssm_web子模块(打包方式是war包)
- 创建ssm_service子模块(打包方式是jar包)
- 创建ssm_dao子模块(打包方式是jar包)
- 创建ssm_domain子模块(打包方式是jar包)
- web依赖于service,service依赖于dao,dao依赖于domain
- 在ssm_parent的pom.xml文件中引入坐标依赖
<properties>
<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>
<!-- spring -->
<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>${spring.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${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>
工程目录
实体类domain
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 +
'}';
}
}
持久层AccountDao
持久层只写接口
/**
* 账户dao接口
*/
public interface AccountDao {
/**
* 查询所有
*/
List<Account> findAll();
/**
* 保存账户
*/
void saveAccount(Account account);
}
业务层AccountService
public interface AccountService {
/**
* 查询所有
*/
List<Account> findAll();
/**
* 保存账户
*/
void saveAccount(Account account);
}
@Service("accountService")
public class AccountServiceImpl implements AccountService {
public List<Account> findAll() {
System.out.println("业务层,查询所有账户...");
return null;
}
public void saveAccount(Account account) {
System.out.println("业务层,保存账户...");
}
}
表项层controller
在controller包下创建类AccountController,以后待用
Spring框架代码的编写
二、Spring框架测试
1. 搭建和测试Spring的开发环境
在resources
资源目录下创建ApplicationContext.xml
配置文件,用来进行spring
的配置.
<?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,要扫描的是service和dao层的注解,要忽略web层注解,因为web层让SpringMVC框架
去管理 -->
<context:component-scan base-package="code">
<!-- 配置要忽略的注解 -->
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
</beans>
2. 编写测试方法,进行测试
public class TestSpring {
@Test
public void run1(){
// 1.加载 spring 的配置文件
ApplicationContext ac =new ClassPathXmlApplicationContext("classpath:ApplicationContext.xml");
// 2.获取对象
AccountService as = (AccountService) ac.getBean("accountService");
//3.调用方法
as.findAll();
}
}
二、SpringMVC框架测试
1. 在web.xml中配置前端控制器
<web-app>
<display-name>Archetype Created Web Application</display-name>
<!-- 配置前端控制器-->
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 加载 springmvc 配置文件-->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
<!--启动服务器,创建该servlet-->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 解决中文乱码的过滤器-->
<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>
</web-app>
2. springmvc.xml配置文件
在resources资源包下创建springmvc进行配置
<?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">
<!--开启注解扫描,只扫描 Controller 注解-->
<context:component-scan base-package="code">
<!-- 只扫描Controller注解-->
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!-- 配置的视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<!-- 过滤静态资源-->
<!-- 设置静态资源不过滤 -->
<mvc:resources mapping="/css/" location="/css/**" ></mvc:resources>
<mvc:resources mapping="/js/" location="/js/**" ></mvc:resources>
<mvc:resources mapping="/images/" location="/images/**" ></mvc:resources>
<!-- 开启SpringMVC 注解的支持-->
<mvc:annotation-driven />
</beans>
3. 测试springmvc单独的正确性
index.jsp
<a href="account/findAll">查询所有</a>
controller控制器方法
/**
* 账户 web
*/
@Controller
@RequestMapping(path = "/account")
public class AccountController {
@RequestMapping(path = "/findAll")
public String findAll(){
System.out.println("表项层,查询所有账户...");
return "list";
}
}
三、Spring整合SpringMVC的框架
1. 整合原理:
### 2.让web加载spring配置文件applicationContext.xml 1. 目的:在controller中能成功的调用service对象中的方法 2. 让springmvc在服务器启动时加载applicationContext.xml 在web.xml中配置监听器,让监听器在监听到服务器启动时就加载applicationContext.xmlContextLoaderListener监听器(该监听器只能加载WEB-INF目录下的applicationContext.xml的配文件)
<!-- 配置spring的监听器,默认只加载WEB-INF目录下的ApplicationContext文件-->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:ApplicationContext.xml</param-value>
</context-param>
3. 在controller中注入service对象,调用service的方法
/**
* 账户 web
*/
@Controller
@RequestMapping(path = "/account")
public class AccountController {
@Autowired
private AccountService accountService;
@RequestMapping(path = "/findAll")
public String findAll(){
System.out.println("表项层,查询所有账户...");
// 调用service方法
accountService.findAll();
return "list";
}
}
四、MyBatis框架测试
1. 使用注解方式编写sql语句
/**
* 账户dao接口
*/
public interface AccountDao {
/**
* 查询所有
*/
@Select("select * from account")
List<Account> findAll();
/**
* 保存账户
*/
@Insert("insert into account (name,money) values(#{name},#{money})")
void saveAccount(Account account);
}
2. 编写SqlMapConfig.xml的配置文件
在resources资源包下创建
<?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>
<!-- 配置环境-->
<environments default="mysql">
<environment id="mysql">
<transactionManager type="JDBC"></transactionManager>
<dataSource type="POOLED">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql:///ssm"/>
<property name="username" value="root"/>
<property name="password" value="root"/>
</dataSource>
</environment>
</environments>
<!-- 引入映射的配置文件-->
<mappers>
<!-- <mapper class="code.dao.AccountDao"></mapper>-->
<package name="code.dao"/>
</mappers>
</configuration>
3. 测试能否操作数据库
public class TestMyBatis {
@Test
public void run2() throws IOException {
//1.加载配置文件
InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
//2.构建者模式创建工厂
SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
//3.工厂模式生成session
SqlSession session = factory.openSession();
//4.代理模式得到dao对象
AccountDao dao = session.getMapper(AccountDao.class);
//5.调用dao方法
List<Account> accouts = dao.findAll();
for (Account account:accouts){
System.out.println(account);
}
//6.关闭资源
session.close();
in.close();
}
}
五、Spring整合MyBatis框架
目的:
把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中。
因为我们的AccounService已经让spring容器替我们管理了,需要使用时随时注入。
因此我们也希望AccountDao
也被spring
容器管理,不需要再通过读取配置文件流使用工厂去手动创建。
这样在AccountServiceImpl类中直接使用AccountDao为业务层服务。
1. 在ApplicationContex.xml中编写spring的MyBatis配置
<!-- spring整合MyBatis框架-->
<!-- 配置连接池-->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
<property name="user" value="root"/>
<property name="password" value="root"/>
</bean>
<!-- 配置SqlSessionFactory工厂-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
</bean>
<!-- 配置AccountDao接口所在包-->
<bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="code.dao"></property>
</bean>
2. 在AccountDao接口中添加@Repository注解
3. 在service中注入dao对象,进行测试
4. 代码如下
- AccountService层使用注解注入方式创建AccountDao
@Service("accountService")
public class AccountServiceImpl implements AccountService {
@Autowired
private AccountDao accountDao;
public List<Account> findAll() {
System.out.println("业务层,查询所有账户...");
List<Account> list = accountDao.findAll();
return list;
}
public void saveAccount(Account account) {
System.out.println("业务层,保存账户...");
accountDao.saveAccount(account);
}
}
- AcoountController表现层发出查询命令,并将结果展示到跳转的页面上
/**
* 账户 web
*/
@Controller
@RequestMapping(path = "/account")
public class AccountController {
@Autowired
private AccountService accountService;
@RequestMapping(path = "/findAll")
public String findAll(Model model){
System.out.println("表项层,查询所有账户...");
// 调用service方法
List<Account> list = accountService.findAll();
model.addAttribute("list",list);
return "list";
}
}
- 跳转目的页面 list.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>查询所有</title>
</head>
<body>
<h3>已经查询了所有账户信息</h3>
<%--遍历结果集--%>
<c:forEach items="${list}" var="account">
${account.name}
</c:forEach>
</body>
</html>
六、总结概览,整合的思路
最后运行结果,在页面上点击连接首先传到 UserConteoller类中,执行里面的代码。