SSM 框架整合

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SSM 框架整合

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原始整合方式

  • 数据表
    create database ssm character set utf8;
    use ssm;
    create table account(
    	id int primary key auto_increment,
    	name varchar(100),
    	money double(7,2)
    );
    复制代码
  • 创建 Maven 工程
  • 导入 Maven 坐标
    <?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>com.ruochen</groupId>
        <artifactId>ssm</artifactId>
        <version>1.0-SNAPSHOT</version>
        <packaging>war</packaging>
    
        <properties>
            <maven.compiler.source>8</maven.compiler.source>
            <maven.compiler.target>8</maven.compiler.target>
        </properties>
    
        <dependencies>
            <!--spring相关-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.0.5.RELEASE</version>
            </dependency>
            <!--aop织入-->
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.8.8</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
                <version>5.0.5.RELEASE</version>
            </dependency>
            <!--事务相关-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-tx</artifactId>
                <version>5.0.5.RELEASE</version>
            </dependency>
            <!--测试相关-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>5.0.5.RELEASE</version>
            </dependency>
            <!--springmvc相关-->
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>5.0.5.RELEASE</version>
            </dependency>
    
            <!--servlet 和 jsp-->
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.5</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.0</version>
            </dependency>
    
            <!--mybatis 相关-->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>3.5.5</version>
            </dependency>
            <!--spring 整合 mybatis -->
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>1.3.1</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>5.1.46</version>
            </dependency>
            <!--数据源-->
            <dependency>
                <groupId>c3p0</groupId>
                <artifactId>c3p0</artifactId>
                <version>0.9.1.2</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.13</version>
                <scope>test</scope>
            </dependency>
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
        </dependencies>
    
    </project>
    复制代码
  • 编写实体类 Account.java
    package com.ruochen.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 +
                    '}';
        }
    }
    复制代码
  • 编写 Mapper 接口
    package com.ruochen.mapper;
    
    import com.ruochen.domain.Account;
    
    import java.util.List;
    
    public interface AccountMapper {
    
        void save(Account account);
    
        List<Account> findAll();
    }
    复制代码
  • 编写 Service 接口
    package com.ruochen.service;
    
    import com.ruochen.domain.Account;
    
    import java.util.List;
    
    public interface AccountService {
        void save(Account account);
    
        List<Account> findAll();
    
    }
    复制代码
  • 编写 Service 接口实现
    package com.ruochen.service.impl;
    
    import com.ruochen.domain.Account;
    import com.ruochen.mapper.AccountMapper;
    import com.ruochen.service.AccountService;
    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.springframework.stereotype.Service;
    
    import java.io.IOException;
    import java.io.InputStream;
    import java.util.List;
    
    @Service("accountService")
    public class AccountServiceImpl implements AccountService {
        @Override
        public void save(Account account) {
            try {
                InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
                SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
                SqlSession sqlSession = sqlSessionFactory.openSession();
                AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
                mapper.save(account);
                sqlSession.commit();
                sqlSession.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    
        @Override
        public List<Account> findAll() {
            try {
                InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
                SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
                SqlSession sqlSession = sqlSessionFactory.openSession();
                AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
                List<Account> accountList = mapper.findAll();
                sqlSession.close();
                return accountList;
            } catch (IOException e) {
                e.printStackTrace();
            }
            return null;
        }
    }
    复制代码
  • 编写 Controller
    package com.ruochen.controller;
    
    import com.ruochen.domain.Account;
    import com.ruochen.service.AccountService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.servlet.ModelAndView;
    
    import java.util.List;
    
    @Controller
    @RequestMapping("/account")
    public class AccountController {
    
        @Autowired
        private AccountService accountService;
    
        // 保存
        @RequestMapping(value = "/save", produces = "text/html;charset=UTF-8")
        @ResponseBody
        public String save(Account account) {
            accountService.save(account);
            return "保存成功";
        }
    
        // 查询
        @RequestMapping("/findAll")
        public ModelAndView findAll() {
            List<Account> accountList = accountService.findAll();
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.addObject("accountList", accountList);
            modelAndView.setViewName("accountList");
            return modelAndView;
        }
    }
    复制代码
  • 编写添加页面
    <%--
      Created by IntelliJ IDEA.
      User: ruochen
      Date: 2022/3/12
      Time: 21:31
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
        <head>
            <title>Title</title>
        </head>
        <body>
            <h1>添加账户信息表单</h1>
            <form name="accountForm" action="${pageContext.request.contextPath}/account/save" method="post">
                账户名称:<input type="text" name="name"><br/>
                账户金额:<input type="text" name="money"><br/>
                <input type="submit" value="保存"><br/>
            </form>
        </body>
    </html>
    
    复制代码
  • 编写列表页面
    <%--
      Created by IntelliJ IDEA.
      User: ruochen
      Date: 2022/3/12
      Time: 21:34
      To change this template use File | Settings | File Templates.
    --%>
    <%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <html>
        <head>
            <title>Title</title>
        </head>
        <body>
            <h1>展示账户数据列表</h1>
            <table border="1">
                <tr>
                    <th>账户ID</th>
                    <th>账户名称</th>
                    <th>账户金额</th>
                </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>
    复制代码
  • 编写相应配置文件
    • Spring 配置文件: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"
           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
    ">
    
    
        <!--组件扫描 扫描 service 和 mapper-->
        <context:component-scan base-package="com.ruochen">
            <!--排除controller的扫描-->
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
    </beans>
    复制代码
    • SpringMVC 配置文件: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: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 http://www.springframework.org/schema/mvc/spring-mvc.xsd
                               http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
    
        <!--组件扫描 主要扫描 controller-->
        <context:component-scan base-package="com.ruochen.controller"/>
    
        <!--配置 mvc 注解驱动-->
        <mvc:annotation-driven/>
    
        <!--配置内部资源视图解析器-->
        <bean id="resourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/pages/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
    
        <!--开放静态资源访问权限-->
        <mvc:default-servlet-handler/>
    </beans>
    复制代码
    • MyBatis 映射文件:AccountMapper.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="com.ruochen.mapper.AccountMapper">
        <insert id="save" parameterType="account">
            insert into account
            values (#{id}, #{name}, #{money})
        </insert>
    
        <select id="findAll" resultType="account">
            select *
            from account
        </select>
    </mapper>
    复制代码
    • MyBatis 核心文件:sqlMapConfig.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>
    
        <!--加载 properties文件-->
        <properties resource="jdbc.properties"/>
    
        <!--定义别名-->
        <typeAliases>
            <!--<typeAlias type="com.ruochen.domain.Account" alias="account"/>-->
            <!--扫包-->
            <package name="com.ruochen.domain"/>
        </typeAliases>
    
        <!--环境-->
        <environments default="development">
            <environment id="development">
                <transactionManager type="JDBC"/>
                <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-->
        <mappers>
            <!--<mapper resource="com.ruochen.mapper.AccountMapper"/>-->
            <package name="com.ruochen.mapper"/>
        </mappers>
    </configuration>
    复制代码
    • 数据库连接信息文件:jdbc.properties
    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/ssm?useSSL=false&useServerPrepStmts=true&useUnicode=true&characterEncoding=UTF-8
    jdbc.username=root
    jdbc.password=ruochen666
    复制代码
    • Web.xml 文件:web.xml
    <?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_4_0.xsd"
             version="4.0">
    
        <!--spring 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>
    
        <!--springmvc 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>
    
        <!--乱码过滤器-->
        <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>
    复制代码
    • 日志文件:log4j.xml
    ### direct log messages to stdout ###
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.Target=System.out
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
    log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
    
    ### direct messages to file mylog.log ###
    log4j.appender.file=org.apache.log4j.FileAppender
    log4j.appender.file.File=c:/mylog.log
    log4j.appender.file.layout=org.apache.log4j.PatternLayout
    log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
    
    ### set log levels - for more verbose logging change 'info' to 'debug' ###
    
    log4j.rootLogger=debug, stdout
    
    复制代码

MyBatis 整合 Spring 实现

  • sqlMapConfig.xml 修改如下
    <?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>
    
        <!--定义别名-->
        <typeAliases>
            <package name="com.ruochen.domain"/>
        </typeAliases>
    
    </configuration>
    复制代码
  • applicationContext.xml 修改如下
    <?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:tx="http://www.springframework.org/schema/tx"
           xmlns:aop="http://www.springframework.org/schema/aop"
           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/tx http://www.springframework.org/schema/tx/spring-tx.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
    ">
    
        <!--组件扫描 扫描 service 和 mapper-->
        <context:component-scan base-package="com.ruochen">
            <!--排除controller的扫描-->
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
    
        <!--加载 properties 文件-->
        <context:property-placeholder location="classpath:jdbc.properties"/>
    
        <!--配置数据源-->
        <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
            <property name="driverClass" value="${jdbc.driver}"/>
            <property name="jdbcUrl" value="${jdbc.url}"/>
            <property name="user" value="${jdbc.username}"/>
            <property name="password" value="${jdbc.password}"/>
        </bean>
    
        <!--配置 sessionFactory-->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            <!--加载 mybatis 核心文件-->
            <property name="configLocation" value="classpath:sqlMapConfig.xml"/>
        </bean>
    
        <!--扫描 mapper 所在的包,为 mapper 创建实现类-->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.ruochen.mapper"/>
        </bean>
    
        <!--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"/>
        </bean>
    
        <!--配置事务增强-->
        <tx:advice id="txAdvice">
            <tx:attributes>
                <tx:method name="*"/>
            </tx:attributes>
        </tx:advice>
    
        <!--事务的aop织入-->
        <aop:config>
            <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.ruochen.service.impl.*.*(..))"/>
        </aop:config>
    </beans>
    复制代码
  • AccountServiceImpl.java 修改如下
    package com.ruochen.service.impl;
    
    import com.ruochen.domain.Account;
    import com.ruochen.mapper.AccountMapper;
    import com.ruochen.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 AccountMapper accountMapper;
    
        @Override
        public void save(Account account) {
            accountMapper.save(account);
        }
    
        @Override
        public List<Account> findAll() {
            return accountMapper.findAll();
        }
    }
    复制代码

报错:Method com/mchange/v2/c3p0/impl/NewProxyResultSet.isClosed()Z is abstract 解决方法 在 pom.xml 文件中修改C3P0的依赖包

<dependency>
   <groupId>com.mchange</groupId>
   <artifactId>c3p0</artifactId>
   <version>0.9.5.2</version>
</dependency>
复制代码
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