SSM整合

依赖

<?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>
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    <groupId>org.example</groupId>
    <artifactId>ssm</artifactId>
    <version>1.0-SNAPSHOT</version>
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    <dependencies>
        <!--        spring相关-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.6</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.3</version>
        </dependency>
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        <!--        servlet和jsp-->
        <!--        注意tomcat10 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
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        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.2</version>
        </dependency>
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        <!--        mybatis相关-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.6</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.6</version>
        </dependency>
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        <!--        <dependency>-->
        <!--            <groupId>c3p0</groupId>-->
        <!--            <artifactId>c3p0</artifactId>-->
        <!--            <version>0.9.1.1</version>-->
        <!--        </dependency>-->
        <!--      处理c3p0版本不兼容问题  -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>
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        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13</version>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
    </dependencies>
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</project>

实体类

package com.cyz.domain;
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import java.math.BigDecimal;
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public class Account {
    private Integer id;
    private String name;
    private BigDecimal money;
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    public Integer getId() {
        return id;
    }
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    public void setId(Integer id) {
        this.id = id;
    }
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    public String getName() {
        return name;
    }
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    public void setName(String name) {
        this.name = name;
    } 
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    public BigDecimal getMoney() {
        return money;
    }
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    public void setMoney(BigDecimal money) {
        this.money = money;
    }
}
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Mapper

package com.cyz.mapper;
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import com.cyz.domain.Account;
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import java.util.List;
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public interface AccountMapper {
    public void save(Account account);
    
    public List<Account> findAll();
}

Service

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

package com.cyz.service.impl;
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import com.cyz.domain.Account;
import com.cyz.mapper.AccountMapper;
import com.cyz.service.AccountService;
import com.sun.org.apache.bcel.internal.generic.NEW;
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;
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import java.io.IOException;
import java.io.InputStream;
import java.util.List;
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@Service("accountService")
public class AccountServiceImpl implements AccountService {
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    @Override
    public void save(Account account) {
        try {
            InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
            SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
            SqlSession sqlSession = sessionFactory.openSession(true);
            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
            mapper.save(account);
            sqlSession.commit();
            sqlSession.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
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    @Override
    public List<Account> findAll() {
        try {
            InputStream resourceAsStream = Resources.getResourceAsStream("sqlMapConfig.xml");
            SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(resourceAsStream);
            SqlSession sqlSession = sessionFactory.openSession(true);
            AccountMapper mapper = sqlSession.getMapper(AccountMapper.class);
            List<Account> accountList = mapper.findAll();
            sqlSession.close();
            return accountList;
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

页面

save.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>添加页面</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>

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>账户列表页面</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>
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配置文件

jdbc.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/jdbc_test
jdbc.username=root
jdbc.password=123456

log4j.properties

#console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.err
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
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#file
#log4j.appender.file=org.apache.log4j.FileAppender
#log4j.appender.file.File=e:/mylog.log
#log4j.appender.file.layout=org.apache.log4j.PatternLayout
#log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
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log4j.rootLogger=all,stdout

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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/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
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        ">
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<!--    组件扫描 扫描 service 和 mapper -->
        <context:component-scan base-package="com.cyz">
<!--            排除 controller 的扫描-->
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
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</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: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
">
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<!--    组件扫描 主要扫描 controller -->
    <context:component-scan base-package="com.cyz.controller"/>
<!--    配置mvc 注解驱动-->
    <mvc:annotation-driven/>
<!--  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>
<!--    开放静态资源的访问权限-->
    <mvc:default-servlet-handler/>
</beans>

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>
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<!--    加载properties文件-->
    <properties resource="jdbc.properties"/>
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<!--    定义别名-->
    <typeAliases>
<!--        <typeAlias type="com.cyz.domain.Account" alias="account"/>-->
<!--    扫包    默认为当前实体名称 或 首字母小写-->
        <package name="com.cyz.domain"/>
    </typeAliases>
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<!--    配置环境-->
    <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>
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<!--    加载映射-->
    <mappers>
<!--        <mapper resource="com/cyz/mapper/AccountMapper.xml"/>-->
<!--        扫描包-->
        <package name="com.cyz.mapper"/>
    </mappers>
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</configuration>

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>
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<!--     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>

mapper.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.cyz.mapper.AccountMapper">
    <insert id="save" parameterType="account">
        insert into account values(#{id},#{name},#{money})
    </insert>
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    <select id="findAll" resultType="account">
        select * from account
    </select>
</mapper>

Controller

package com.cyz.controller;
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import com.cyz.domain.Account;
import com.cyz.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;
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import java.util.List;
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@Controller
@RequestMapping("/account")
public class AcountController {
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    @Autowired
    private AccountService accountService;
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    /**
     * 保存
     * produces     返回值编码格式
     * @param account 实体对象
     * @return 结果
     */
    @RequestMapping(value = "/save", produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String save(Account account) {
        accountService.save(account);
        return "保存成功";
    }
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    /**
     * 查询
     *
     * @return
     */
    @RequestMapping("/findAll")
    public ModelAndView findAll() {
        List<Account> accountList = accountService.findAll();
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("accountList", accountList);
        modelAndView.setViewName("accountList");
        return modelAndView;
    }
}

测试

• http://localhost:8080/save.jsp

• http://localhost:8080/account/findAll

弊端

• service层中每次执行业务都需要加载配置文件创建sqlSessionFactory工厂

解决

• 将sqlSessionFactory交由spring管理

• 事务使用声明式控制

• 使用时从容器中获取Mapper实例即可

整合

• 将sqlMapConfig.xml改为sqlMapConfig-spring.xml

sqlMapConfig-spring.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>
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<!--    定义别名-->
    <typeAliases>
<!--        <typeAlias type="com.cyz.domain.Account" alias="account"/>-->
<!--    扫包    默认为当前实体名称 或 首字母小写-->
        <package name="com.cyz.domain"/>
    </typeAliases>
</configuration>

修改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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/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
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        ">
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<!--    组件扫描 扫描 service 和 mapper -->
        <context:component-scan base-package="com.cyz">
<!--            排除 controller 的扫描-->
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        </context:component-scan>
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<!--        加载properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
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<!--    配置数据源信息-->
    <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>
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<!--    配置sessionFactory
    <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.5</version>
        </dependency>
        依赖中 提供了一个sqlSessionFactory的实现类
-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
<!--        加载mybatis的核心配置文件-->
        <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"/>
    </bean>
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<!--    扫描mapper所在的包-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.cyz.mapper"/>
    </bean>
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</beans>

修改serviceImpl

package com.cyz.service.impl;
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import com.cyz.domain.Account;
import com.cyz.mapper.AccountMapper;
import com.cyz.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
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import java.util.List;
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@Service("accountService")
public class AccountServiceImpl implements AccountService {
    
    @Autowired
    private AccountMapper accountMapper;
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    @Override
    public void save(Account account) {
        accountMapper.save(account);
    }
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    @Override
    public List<Account> findAll() {
        return accountMapper.findAll();
    }
}

测试

• http://localhost:8080/save.jsp

• http://localhost:8080/account/findAll

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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/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
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
        ">
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    <!--    组件扫描 扫描 service 和 mapper -->
    <context:component-scan base-package="com.cyz">
        <!--            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"/>
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    <!--    配置数据源信息-->
    <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
        <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>2.0.5</version>
            </dependency>
            依赖中 提供了一个sqlSessionFactory的实现类
    -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--        加载mybatis的核心配置文件-->
        <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"/>
    </bean>
?
    <!--    扫描mapper所在的包    为mapper创建实例类-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.cyz.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.cyz.service.impl.*.*(..))"/>
    </aop:config>
</beans>

SSM整合篇

原文：https://www.cnblogs.com/liang-chen-fly/p/14630646.html