#极简的SSM小项目：超容易上手(附源码) @FDDLC

【写完博客后的补充：这里一次性给出全部依赖】

pom.xml的内容：

<?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>org.example</groupId> <artifactId>SSM</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>SSM 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>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>8.0.16</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.5</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.1</version> </dependency> <dependency> <groupId>com.mchange</groupId> <artifactId>c3p0</artifactId> <version>0.9.5.2</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>taglibs</groupId> <artifactId>standard</artifactId> <version>1.1.2</version> </dependency> </dependencies> <build> <finalName>SSM</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <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>

 

一、创建项目

1、使用Web模板，新建Maven项目：

 

2、导包，即添加Maven依赖：spring-webmvc、junit

<dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> </dependencies>

导包结果：

从上面这张依赖图可以看出，咱们明面上只导了两个包，实际上却有这么多包进来了，其中包括Spring、SpringMVC！

 

3、建好项目的结构：在main文件夹下新建java文件夹(要标记为Sources Root)和resources文件夹(要标记为Resources Root)，然后在java文件夹下新建csdn.domain、csdn.dao、csdn.service、csdn.controller这几个包，建好后长这样：

 

 

二、搭建Spring的环境

1、在csdn.domain下新建Account类：

package csdn.domain; public class Account { 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、在csdn.dao下新建AccountDao接口：

package csdn.dao; import csdn.domain.Account; import java.util.List; public interface AccountDao { List<Account> findAll(); void save(Account account); }

 

3、在csdn.dao下新建impl子包，再在impl子包下新建AccountDaoImpl类(两步可合并为一步，即直接在csdn.dao下新建impl.AccountDaoImpl类；后面也有类似的操作，不再赘述！)：

package csdn.dao.impl; import csdn.dao.AccountDao; import csdn.domain.Account; import org.springframework.stereotype.Repository; import java.util.List; @Repository("accountDao") public class AccountDaoImpl implements AccountDao { @Override public List<Account> findAll() { System.out.println("AccountDao实现类中的findAll方法到此一游~"); return null; } @Override public void save(Account account) { System.out.println("AccountDao实现类中的save方法到此一游~"); } }

 

4、在csdn.service下新建AccountService接口：

package csdn.service; import csdn.domain.Account; import java.util.List; public interface AccountService { List<Account> findAll(); void save(Account account); }

 

5、在csdn.service下新建impl子包，再在impl子包下新建AccountServiceImpl类：

package csdn.service.impl; import csdn.dao.AccountDao; import csdn.domain.Account; import csdn.service.AccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service("accountService") public class AccountServiceImpl implements AccountService { @Autowired private AccountDao accountDao; @Override public List<Account> findAll() { accountDao.findAll(); System.out.println("我是AccountService实现类，我刚刚调用了dao~"); return null; } @Override public void save(Account account) { accountDao.save(account); System.out.println("我是AccountService实现类，我刚刚调用了dao~"); } }

 

6、在resources下新建spring.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="csdn"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>

 

7.1、在main文件夹下新建test文件夹，并标记为Test Sources Root：

7.2、在pom.xml中新增spring-test依赖(开头有完整版pom.xml)

 

7.3、在test文件夹下新建SpringTest类：

import csdn.domain.Account; import csdn.service.AccountService; 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; @ContextConfiguration(locations = "classpath:spring.xml") @RunWith(SpringJUnit4ClassRunner.class) public class SpringTest { @Autowired private AccountService accountService; @Test public void test() { accountService.findAll(); //accountService.save(new Account()); } }

经测试，Spring没毛病！

 

三、搭建SpringMVC的环境

1、在webapp下新建css、js、image文件夹，在WEB-INF下新建pages文件夹：

2、在resources下新建springmvc.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:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="csdn"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <mvc:annotation-driven /> <mvc:resources mapping="/css/**" location="/css/" /> <mvc:resources mapping="/js/**" location="/js/" /> <mvc:resources mapping="/image/**" location="/image/" /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver"> <property name="prefix" value="/WEB-INF/pages/" /> <property name="suffix" value=".jsp" /> </bean> </beans>

3、修改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> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <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>

 

4、删除index.jsp，再新建index.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h3><a href="hello">toHello</a></h3> </body> </html>

5、在pages下新建hello.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h3>hello</h3> </body> </html>

6、在controller包下新建HelloController类：

package csdn.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class HelloController { @RequestMapping("/hello") public String hello() { return "hello"; } }

7、添加Tomcat，并关联项目：

 

8、启动Web项目，经测试，SpringMVC没毛病！

 

四、Spring与SpringMVC的整合

1、修改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> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring.xml</param-value> </context-param> <filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <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>

2、修改HelloController：

package csdn.controller; import csdn.service.AccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; @Controller public class HelloController { @Autowired private AccountService accountService; @RequestMapping("/hello") public String hello() { accountService.findAll(); System.out.println("我是HelloController，我刚刚调用了accountService~"); return "hello"; } }

3、重启Tomcat，点击超链接，页面成功跳转，控制台输出：

Spring和SpringMVC整合成功！

 

五、搭建MyBatis的环境

1、增加Maven依赖：mysql-connector-java、mybatis(开头有完整版pom.xml)

2、准备好数据库，新建account表(id，name，money)，填充若干条记录。

database：test        port：3306        table：account

 

3、编写account表对应的实体类Account(前面已有)。

4、编写AccountDao接口(前面已有)。

5、在resources下新建csdn文件夹，再在csdn文件下新建dao文件夹，编写AccountDao.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="csdn.dao.AccountDao"> <select id="findAll" resultType="csdn.domain.Account"> select * from account </select> <insert id="save" parameterType="csdn.domain.Account"> insert into account (name, money) values (#{name}, #{money}) </insert> </mapper>

6、在resources下新建mybatis.xml：

<?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> <environments default="mysql"> <environment id="mysql"> <transactionManager type="JDBC"></transactionManager> <dataSource type="POOLED"> <property name="driver" value="com.mysql.cj.jdbc.Driver"/> <property name="url" value="jdbc:mysql://localhost:3306/Test?characterEncoding=UTF8&amp;serverTimezone=Asia/Shanghai"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments> <mappers> <mapper resource="csdn/dao/AccountDao.xml" /> </mappers> </configuration>

7、在test文件夹下新建MyBatisTest类：

import csdn.dao.AccountDao; import csdn.domain.Account; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.junit.Test; import java.io.InputStream; import java.util.List; public class MyBatisTest { @Test public void test() throws Exception { InputStream in = Resources.getResourceAsStream("mybatis.xml"); SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder(); SqlSessionFactory factory = builder.build(in); SqlSession session = factory.openSession(true); AccountDao accountDao = session.getMapper(AccountDao.class); List<Account> accounts = accountDao.findAll(); for(Account account: accounts) { System.out.println(account); } session.close(); in.close(); } }

经测试，MyBatis没毛病！

 

六、整合Spring和MyBatis

1、增加Maven依赖：mybatis-spring、c3p0、spring-tx、spring-jdbc(开头有完整版pom.xml)

2、修改spring.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" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd"> <context:component-scan base-package="csdn"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property> <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/test?characterEncoding=UTF8&amp;serverTimezone=Asia/Shanghai"></property> <property name="user" value="root"></property> <property name="password" value="root"></property> </bean> <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory"> <property name="dataSource" ref="dataSource" /> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer" id="mapperScannerConfigurer"> <property name="basePackage" value="csdn.dao" /> </bean> </beans>

 

3、修改AccountDao接口：

package csdn.dao; import csdn.domain.Account; import org.springframework.stereotype.Repository; import java.util.List; @Repository("accountDaoProxy") public interface AccountDao { List<Account> findAll(); void save(Account account); }

 

4、在test文件夹下新建SpringAndMyBatisTest类：

import csdn.dao.AccountDao; import csdn.domain.Account; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import java.util.List; public class SpringAndMyBatisTest { @Test public void test() { ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml"); AccountDao accountDao = context.getBean("accountDaoProxy", AccountDao.class); List<Account> accounts = accountDao.findAll(); for (Account account : accounts) { System.out.println(account); } } }

经测试，没毛病！

 

七、Spring、SpringMVC、MyBatis三体合一

1、导入依赖：jstl、standard(开头有完整版pom.xml)

2、修改AccountServiceImpl类：

package csdn.service.impl; import csdn.dao.AccountDao; import csdn.domain.Account; import csdn.service.AccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Service; import java.util.List; @Service("accountService") public class AccountServiceImpl implements AccountService { @Autowired @Qualifier("accountDaoProxy") private AccountDao accountDao; @Override public List<Account> findAll() { return accountDao.findAll(); } @Override public void save(Account account) { accountDao.save(account); } }

3、修改index.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <h3><a href="hello">toHello</a></h3> <form method="post" action="save"> name: <input type="text" name="name" /><br /> money: <input type="text" name="money" /><br /> <input type="submit" value="提交" /> </form> </body> </html>

4、修改HelloController类：

package csdn.controller; import csdn.domain.Account; import csdn.service.AccountService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import java.util.List; @Controller public class HelloController { @Autowired private AccountService accountService; @RequestMapping("/hello") public String hello(Model model) { List<Account> accounts = accountService.findAll(); model.addAttribute("accounts", accounts); return "hello"; } @RequestMapping("/save") public String save(Account account) { accountService.save(account); return "forward:/hello"; //会请求上一个方法，hello方法 } }

5、修改hello.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>Title</title> </head> <body> <c:forEach items="${accounts}" var="account"> <c:out value="${account.id}" /> <c:out value="${account.name}" /> <c:out value="${account.money}" /> <br /><br /> </c:forEach> </body> </html>

测试结果：

至此，SSM整合成功！

 

 

 

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测试环境：IDEA 2020.2、MySQL 8.0.16

 

项目结构：

 

 

源码链接: https://pan.baidu.com/s/1jFvIhmCiy-tXhNDG3b_dlg    提取码: z8nb