SSM整合(spring+springMVC+mybatis)
SSM整合
什么是SSM
即Spring，SpringMVC，Mybatis三大框架整合在一起的技术。
整合的思路
- 搭建整合的环境
- 先把spring的配置搭建好
- 再使用spring整合SpringMVC框架
- 最后再使用Spring整合Mybatis框架
整合步骤
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创建一个Maven工程，导入需要的坐标依赖（版本和连接池因人而异）
<dependencies> <dependency> <groupId>junitgroupId> <artifactId>junitartifactId> <version>4.12version> <scope>compilescope> dependency> <dependency> <groupId>mysqlgroupId> <artifactId>mysql-connector-javaartifactId> <version>8.0.18version> dependency> <dependency> <groupId>org.aspectjgroupId> <artifactId>aspectjweaverartifactId> <version>1.8.14version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-webmvcartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-webartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-contextartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-aopartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-jdbcartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-txartifactId> <version>${spring.version}version> dependency> <dependency> <groupId>org.springframeworkgroupId> <artifactId>spring-testartifactId> <version>5.1.5.RELEASEversion> dependency> <dependency> <groupId>javax.servlet.jspgroupId> <artifactId>javax.servlet.jsp-apiartifactId> <version>2.3.3version> <scope>providedscope> dependency> <dependency> <groupId>javax.servlet.jsp.jstlgroupId> <artifactId>jstlartifactId> <version>1.2version> dependency> <dependency> <groupId>taglibsgroupId> <artifactId>standardartifactId> <version>1.1.2version> dependency> <dependency> <groupId>org.mybatisgroupId> <artifactId>mybatisartifactId> <version>3.5.4version> dependency> <dependency> <groupId>org.mybatisgroupId> <artifactId>mybatis-springartifactId> <version>2.0.3version> dependency> <dependency> <groupId>log4jgroupId> <artifactId>log4jartifactId> <version>1.2.17version> dependency> <dependency> <groupId>org.slf4jgroupId> <artifactId>slf4j-log4j12artifactId> <version>1.7.30version> dependency> <dependency> <groupId>org.slf4jgroupId> <artifactId>slf4j-apiartifactId> <version>1.7.30version> dependency> <dependency> <groupId>com.alibabagroupId> <artifactId>druidartifactId> <version>1.1.21version> dependency> <dependency> <groupId>org.junit.jupitergroupId> <artifactId>junit-jupiterartifactId> <version>RELEASEversion> <scope>compilescope> dependency> <dependency> <groupId>javax.servletgroupId> <artifactId>javax.servlet-apiartifactId> <version>3.0.1version> <scope>providedscope> dependency> dependencies> -
编写spring的配置文件
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 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/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd" > <context:component-scan base-package="cn.okt"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> context:component-scan> beans> -
编写java代码
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业务层
public interface AccountService { // 查询所有账户信息 List<Account> findAll(); // 保存账户信息 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：保存帐户..."); } } -
持久层
/** * 帐户dao接口 */ public interface AccountDao { // 查询所有账户 public List<Account> findAll(); // 保存帐户信息 public void saveAccount(Account account); } -
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 + '}'; } }
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编写测试类，测试spring环境是否搭建成功
public class TestSpring { @Test public void run1(){ ApplicationContext ac=new ClassPathXmlApplicationContext("classpath:spring的配置文件名称"); AccountService service=(AccountService) ac.getBean("accountService"); service.findAll(); service.saveAccount(new Account()); } } -
Spring整合springMVC，编写web.xml，配置前端控制器，中文乱码，Spring监听器
<web-app> <display-name>Archetype Created Web Applicationdisplay-name> <listener> <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class> listener> <context-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:spring配置名称param-value> context-param> <servlet> <servlet-name>dispatcherServletservlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class> <init-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:springmvc配置名称param-value> init-param> <load-on-startup>1load-on-startup> servlet> <servlet-mapping> <servlet-name>dispatcherServletservlet-name> <url-pattern>/url-pattern> servlet-mapping> <filter> <filter-name>characterEncodingFilterfilter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class> <init-param> <param-name>encodingparam-name> <param-value>UTF-8param-value> init-param> filter> <filter-mapping> <filter-name>characterEncodingFilterfilter-name> <url-pattern>/*url-pattern> filter-mapping> web-app> -
编写SpringMVC配置文件
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编写控制层代码
/** * 帐户web */ @Controller @RequestMapping("/account") public class AccountController { @Autowired private AccountService accountService; @RequestMapping("/findAll") public String findAll(Model model){ System.out.println("表现层：查询所有账户..."); // 调用service的方法 List<Account> list = accountService.findAll(); model.addAttribute("list",list); return "list"; } } -
编写前端页面，并开启tomcat测试
<index页面> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Titletitle> head> <body> <h3>测试h3> <a href="account/findAll">测试a> <form action="account/save" method="post"> 姓名：<input type="text" name="name"><br> 金额：<input type="text" name="money"><br> <input type="submit" value="保存"> form> body> html><%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%> Title 已成功查询
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Spring整合Mybatis,修改持久层和业务层代码
@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..."); return accountDao.findAll(); } public void saveAccount(Account account) { System.out.println("业务层：保存帐户..."); accountDao.saveAccount(account); } }/** * 帐户dao接口 */ @Repository public interface AccountDao { // 查询所有账户 @Select("select * from account") public List<Account> findAll(); // 保存帐户信息 @Insert("insert into account (name,money) values (#{name},#{money})") public void saveAccount(Account account); } -
在spring配置文件中配置mybatis
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 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/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd" > <context:component-scan base-package="cn.okt"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> context:component-scan> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="com.mysql.cj.jdbc.Driver">property> <property name="url" value="jdbc:mysql:///ssm?serverTimezone=UTC">property> <property name="username" value="root">property> <property name="password" value="19970930">property> bean> <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource">property> bean> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.okt.dao">property> bean> beans> -
修改前端页面list.jsp，并打开Tomcat进行测试
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>Title 已成功查询
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Spring配置事务，在spring配置文件中添加如下
<tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="find*" read-only="true"/> <tx:method name="*" isolation="DEFAULT">tx:method> tx:attributes> tx:advice> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.okt.service.impl.*ServiceImpl.*(..))">aop:advisor> aop:config> -
在控制层添加save方法
@RequestMapping("/save") public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException { System.out.println("表现层：增加账户..."); // 调用service的方法 accountService.saveAccount(account); //重定向 response.sendRedirect(request.getContextPath()+"/account/findAll"); } -
修改前端页面，并开启Tomcat测试
<%@ page contentType="text/html;charset=UTF-8" language="java" %>Title 测试
测试
总结
归根到底我们要以Spring为核心对其他两个框架进行集成，如若上述测试都通过则代表你已经成功的整合了SSM环境，这时就可以进行项目的开发了。在此处我曾发生了一个让我抓狂的问题，就是在web.xml中将监听类写错了，导致我开启Tomcat时无法加载我的spring的配置文件，从而无法创建所有bean对象，所以一旦发生错误一定要好好看清配置文件是否有配错类，注解是否有漏加，这是典型的错误，毕竟人无完人，总有走神的时候，多加注意就好。