ssm整合

Husp0707
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引言

主要通过配置ssm的框架熟悉并完成一次简单的前后端交互。

一、原始的ssm完成前后端的数据交互

  1. pom.xml中引入相关的依赖：
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.aspectj</groupId>
    <artifactId>aspectjweaver</artifactId>
    <version>1.8.7</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-jdbc</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-tx</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-test</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>5.2.6.RELEASE</version>
</dependency>
<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.1.0</version>
</dependency>
<dependency>
    <groupId>javax.servlet.jsp</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.2.1-b03</version>
</dependency>
<dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</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>2.0.4</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.20</version>
</dependency>
<dependency>
    <groupId>c3p0</groupId>
    <artifactId>c3p0</artifactId>
    <version>0.9.1.2</version>
</dependency>

<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
    <version>4.10</version>
    <scope>test</scope>
</dependency>
  1. 配置mybatis的相关文件

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_test?serverTimezone=Asia/Shanghai
jdbc.username=root
jdbc.password=root

log4j.properties

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
# log4j.appender.LOGFILE=org.apache.log4j.FileAppender
# log4j.appender.LOGFILE.File=d:\axis.log
# log4j.appender.LOGFILE.Append=true
# log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
# log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

mybatis核心配置文件mybatis-config.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>
    <!--通过properties标签加载外部properties文件-->
    <properties resource="jdbc.properties"></properties>

    <!--自定义配置别名-->
    <typeAliases>
        <typeAlias type="cn.hfnu.domain.Account" alias="account"></typeAlias>
    </typeAliases>

    <!--配置数据源环境-->
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
    </environments>

    <!--加载映射文件-->
    <mappers>
        <mapper resource="cn/hfnu/mapper/AccountMapper.xml"></mapper>
    </mappers>
</configuration>
  1. 配置spring和springmvc的相关文件：

applicationContext.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"
       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">

    <!--配置组件扫描service和mapper-->
    <context:component-scan base-package="cn.hfnu">
        <!--排除controller扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

spring-mvc.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"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!--组件扫描：主要扫描controller层-->
    <context:component-scan base-package="cn.hfnu.controller"></context:component-scan>
    <!--配置mvc配置注解驱动-->
    <mvc:annotation-driven />
    <!--内部资源视图解析器-->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- /jsp/success.jsp -->
        <property name="prefix" value="/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!--开启静态资源的访问权限-->
    <mvc:default-servlet-handler />
</beans>

web.xml的配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">

    <!--配置spring的监听器-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--配置spring mvc的前端控制器-->
    <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:spring-mvc.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>
    <!--解决中文乱码问题-->
    <!--配置全局过滤器filter-->
    <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>

二、准备前端页面

表单页面add.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加账户信息</title>
</head>
<body>
<h1>添加用户账户信息表单</h1>
<br>
<form name="accountForm" action="/account/add" method="post">
    账户名称:<input type="text" name="name">
    账户余额:<input type="text" name="money">
    <input type="submit" value="确认添加">
</form>
</body>
</html>

/jsp/accountList.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
    <title>账户列表</title>
</head>
<body>
<h1>展示账户数据列表</h1>
<table border="1">
    <tr>
        <td>账户编号</td>
        <td>账户名称</td>
        <td>账户金额</td>
    </tr>
    <c:forEach items="${accountList}" var="account">
        <tr>
            <td>${account.id}</td>
            <td>${account.name}</td>
            <td>${account.money}</td>
        </tr>
    </c:forEach>
</table>
</body>
</html>

三、编写逻辑代码

controller层：

@Controller
@RequestMapping(value = "/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    @RequestMapping(value = "/findAll")
    public ModelAndView findAll(ModelAndView modelAndView){
        List<Account> accountList = accountService.findAll();
        //设置模型数据
        modelAndView.addObject("accountList", accountList);
        //设置视图名称
        modelAndView.setViewName("accountList");
        return modelAndView;
    }

    @RequestMapping(value = "/add", produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String add(Account account){
        try {
            accountService.add(account);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "添加成功";
    }
}

service层：

@Service("accountService")
public class AccounServiceImpl implements AccountService {

    @Override
    public List<Account> findAll() {
        try {
            //加载核心配置文件
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            //获取sqlSession工厂对象
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            SqlSession sqlSession = sqlSessionFactory.openSession();
            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
            List<Account> accountList = mapper.findAll();
            for (Account account : accountList) {
                System.out.println("======account=========>"+account);
            }
            sqlSession.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    @Override
    public void add(Account account) {
        try {
            //加载核心配置文件
            String resource = "mybatis-config.xml";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            //获取sqlSession工厂对象
            SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
            SqlSession sqlSession = sqlSessionFactory.openSession();
            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
            mapper.add(account);
            sqlSession.commit();
            sqlSession.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

mapper层：

public interface AccountMapper {

    public List<Account> findAll();

    public void add(Account account);
}

接口对应的映射文件AccountMapper.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<!--映射文件DTD的约束头-->
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--根标签的命名空间属性与下面的id组成查询的标识-->
<mapper namespace="cn.hfnu.mapper.AccountMapper">
    <select id="findAll" resultType="account">
        select * from t_account
    </select>

    <insert id="add" parameterType="account">
        insert into t_account (id, name, money) values (#{id}, #{name}, #{money})
    </insert>
</mapper>

测试效果图:

image.png

image.png

image.png

四、spring整合mybatis

  1. 将session工厂交给spring容器管理，从容器中获得执行操作的mappper实例。
  2. 将事务的控制交给spring容器进行声明式事务控制。

applicationContext.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"
       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">

    <!--配置组件扫描service和mapper-->
    <context:component-scan base-package="cn.hfnu">
        <!--排除controller扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--加载properties-->
    <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

    <!--配置数据源信息-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${jdbc.driver}"></property>
        <property name="jdbcUrl" value="${jdbc.url}"></property>
        <property name="user" value="${jdbc.username}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--配置sqlsessionfactory-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <!--加载mybatis核心文件-->
        <property name="configLocation" value="classpath:mybatis-config-spring.xml"></property>
    </bean>

    <!--扫描mapper的映射文件-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="cn.hfnu.mapper"></property>
    </bean>

</beans>

service层:

@Service("accountService")
public class AccounServiceImpl implements AccountService {

    @Autowired
    private AccountMapper accountMapper;

    @Override
    public List<Account> findAll() {
        return accountMapper.findAll();
    }

    @Override
    public void add(Account account) {
        accountMapper.add(account);
    }
}

配置spring的声明式事务控制

<!--配置声明式事务控制-->
<!--平台事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>

<!--配置事务增强-->
<tx:advice id="txAdvice">
    <tx:attributes>
        <tx:method name="*"/>
    </tx:attributes>
</tx:advice>

<!--事务aop的织入-->
<aop:config>
    <aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.hfnu.service.impl.*.*(..))"></aop:advisor>
</aop:config>

service层：

@Service("accountService")
public class AccounServiceImpl implements AccountService {

    @Autowired
    private AccountMapper accountMapper;

    @Override
    public List<Account> findAll() {
        return accountMapper.findAll();
    }

    @Override
    public void add(Account account) {
        accountMapper.add(account);
    }
}

测试效果图：

image.png

本期的通过一个小小案例对之前的spring容器的管理权配置做一个小总结。以上步骤跟着做一遍第一熟悉spring对管理对象的依赖注入和配置。以上的内容是个人的学习记录。不是什么教学哦~~~ 如果觉得有帮助就进来点个赞，点个在看，点个关注。点在看你会变好看，我们的目标和人民日报站在一起！有什么问题在评论区留言，大家相互学习哦

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