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(); } }