SpringMVC_SSM整合案例_hehe.employment.over.39.1

39.1 SSM 整合

39.1.1 搭建整合环境

  • 整合说明: SSM整合可以使用多种方式,咱们会选择XML + 注解的方式
  • 整合的思路
    • 先搭建整合的环境
    • 先把Spring的配置搭建完成
    • 再使用Spring整合SpringMVC框架
    • 最后使用Spring整合MyBatis框架
  • 1.创建数据库和表结构
CREATE DATABASE ssm;
USE ssm;
CREATE TABLE account(
	id INT PRIMARY KEY AUTO_INCREMENT,
	NAME VARCHAR(20),
	money DOUBLE
);
  • 2.编写实体类,在domain项目中编写
package com.xww.domain;

import java.io.Serializable;

/**
 * 帐户
 */
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 +
                '}';
    }
}

  • 3.编写dao接口
package com.xww.dao;

import com.xww.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * 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);

}

39.1.2 Spring框架代码的编写

  • 1.项目中创建applicationContext.xml的配置文件,编写具体的配置信息。
<?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">

    <!--开启注解的扫描,希望处理service和dao,controller不需要Spring框架去处理-->
    <context:component-scan base-package="com.xww" >
        <!--配置哪些注解不扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

</beans>
  • 2.在项目中编写测试方法,进行测试
package com.xww.test;

import com.xww.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring {
    
    

    @Test
    public void run1(){
    
    
        // 加载配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        // 获取对象
        AccountService as = (AccountService) ac.getBean("accountService");
        // 调用方法
        as.findAll();
    }

}

39.1.3 Spring整合SpringMVC框架

  • 1.在web.xml中配置DispatcherServlet前端控制器与解决中文乱码
<!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>
  <!--配置前端控制器-->
  <servlet>
    <servlet-name>dispatcherServlet</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <!--加载springmvc.xml配置文件-->
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:springmvc.xml</param-value>
    </init-param>
    <!--启动服务器,创建该servlet-->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!--解决中文乱码的过滤器-->
  <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>

  • 2.创建springmvc.xml的配置文件,编写配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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">

    <!--开启注解扫描,只扫描Controller注解-->
    <context:component-scan base-package="com.xww">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!--配置的视图解析器对象-->
    <bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!--过滤静态资源-->
    <mvc:resources location="/css/" mapping="/css/**" />
    <mvc:resources location="/images/" mapping="/images/**" />
    <mvc:resources location="/js/" mapping="/js/**" />

    <!--开启SpringMVC注解的支持-->
    <mvc:annotation-driven/>

</beans>
  • 3.创建AccountController类,编写方法,进行测试
package com.xww.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/account")
public class AccountController {
    
    
    /**
     * 查询所有的数据
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll() {
    
    
        System.out.println("表现层:查询所有账户...");
        return "list";
    }
}


<a href="account/findAll">测试查询</a>
  • 4.在项目启动的时候,就去加载applicationContext.xml的配置文件,在web.xml中配置
    • ContextLoaderListener监听器(该监听器只能加载WEB-INF目录下的applicationContext.xml的配置文件)。
  <!--配置Spring的监听器,默认只加载WEB-INF目录下的applicationContext.xml配置文件-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!--设置配置文件的路径-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  • 5.在controller中注入service对象,调用service对象的方法进行测试
package com.xww.controller;

import com.xww.service.AccountService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/account")
public class AccountController {
    
    
    @Autowired
    private AccountService accountService;
    /**
     * 查询所有的数据
     * @return
     */
    @RequestMapping("/findAll")
    public String findAll() {
    
    
        System.out.println("表现层:查询所有账户...");
        return "list";
    }
}


39.1.4 Spring整合MyBatis框

  • 1.在项目中编写SqlMapConfig.xml的配置文件,编写核心配置文件
<?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"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///ssm"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>
    <!-- 使用的是注解 -->
    <mappers>
        <!-- <mapper class="cn.itcast.dao.AccountDao"/> -->
        <!-- 该包下所有的dao接口都可以使用 -->
        <package name="cn.itcast.dao"/>
    </mappers>
</configuration>

  • 2.在AccountDao接口的方法上添加注解,编写SQL语句
package com.xww.dao;

import com.xww.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * 帐户dao接口
 */

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);

}

  • 3.编写测试的方法
package com.xww.test;

import com.xww.dao.AccountDao;
import com.xww.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 TestMyBatis {
    
    

    /**
     * 测试查询
     * @throws Exception
     */
    @Test
    public void run1() throws Exception {
    
    
        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建SqlSession对象
        SqlSession session = factory.openSession();
        // 获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);
        
        // 查询所有数据
        List<Account> list = dao.findAll();
        for(Account account : list){
    
    
            System.out.println(account);
        }
        // 关闭资源
        session.close();
        in.close();
    }

    /**
     * 测试保存
     * @throws Exception
     */
    @Test
    public void run2() throws Exception {
    
    
        Account account = new Account();
        account.setName("熊大");
        account.setMoney(400d);

        // 加载配置文件
        InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
        // 创建SqlSessionFactory对象
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
        // 创建SqlSession对象
        SqlSession session = factory.openSession();
        // 获取到代理对象
        AccountDao dao = session.getMapper(AccountDao.class);

        // 保存
        dao.saveAccount(account);

        // 提交事务
        session.commit();

        // 关闭资源
        session.close();
        in.close();
    }

}

39.1.5 Spring整合MyBatis框架

  • 1.把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中
 <!--Spring整合MyBatis框架-->
    <!-- 配置C3P0的连接池对象 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="com.mysql.jdbc.Driver"/>
        <property name="jdbcUrl" value="jdbc:mysql:///ssm"/>
        <property name="user" value="root"/>
        <property name="password" value="root"/>
    </bean>

    <!--配置SqlSessionFactory工厂-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!--配置AccountDao接口所在包-->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.xww.dao"/>
    </bean>
  • 2.在AccountDao接口中添加@Repository注解
package com.xww.dao;

import com.xww.domain.Account;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;

import java.util.List;

/**
 * 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);

}

  • 3.在service中注入dao对象
package com.xww.service.impl;

import com.xww.dao.AccountDao;
import com.xww.domain.Account;
import com.xww.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;

    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);
    }
}

  • 4.测试
package com.xww.test;

import com.xww.service.AccountService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestSpring {
    
    

    @Test
    public void run1(){
    
    
        // 加载配置文件
        ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");
        // 获取对象
        AccountService as = (AccountService) ac.getBean("accountService");
        // 调用方法
        as.findAll();
    }

}

  • 5.在applicationContext.xml中配置Spring的声明式事务管理
    <!--配置Spring框架声明式事务管理-->
    <!--配置事务管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource" />
    </bean>

    <!--配置事务通知-->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="find*" read-only="true"/>
            <tx:method name="*" isolation="DEFAULT"/>
        </tx:attributes>
    </tx:advice>

    <!--配置AOP增强-->
    <aop:config>
        <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xww.service.impl.*ServiceImpl.*(..))"/>
    </aop:config>
  • 6.测试保存帐户的方法
    /**
     * 保存
     * @return
     */
    @RequestMapping("/save")
    public void save(Account account, HttpServletRequest request, HttpServletResponse response) throws IOException {
    
    
        accountService.saveAccount(account);
        response.sendRedirect(request.getContextPath()+"/account/findAll");
        return;
    }

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