SpringMVC_day03_springmvc day03-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_44411701/article/details/108205655

1 搭建整合环境

1.1 整合思路

1.先搭建整合的环境
2. 先把Spring的配置搭建完成
3. 再使用Spring整合SpringMVC框架
4. 最后使用Spring整合MyBatis框架

1.2 建表

create database ssm; 
use ssm; 
create table account( 
id int primary key auto_increment, 
name varchar(20), 
money double 
);

1.3 导入jar包

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <spring.version>5.0.2.RELEASE</spring.version>
    <slf4j.version>1.6.6</slf4j.version>
    <log4j.version>1.2.12</log4j.version>
    <mysql.version>5.1.6</mysql.version>
    <mybatis.version>3.4.5</mybatis.version>
  </properties>

  <dependencies>
    <!-- spring -->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.6.8</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.0</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency> <!-- log start -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency> <!-- log end -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.0</version>
    </dependency>
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
      <type>jar</type>
      <scope>compile</scope>
    </dependency>
  </dependencies>

1.4 具体编码

1.4.1 实体类

public class Account implements Serializable {
    private Integer id;
    private String name;
    private Double money;

    @Override
    public String toString() {
        return "Account{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + 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;
    }
}

1.5 Dao接口

public interface IAccountDao {
    //查询所有
    public List<Account> findAll();
    //保存账户
    public void saveAccount(Account account);
}

1.6 Service接口与实现类

Service接口

public interface IAccountService {
    //查询所有
    public List<Account> findAll();
    //保存账户
    public void saveAccount(Account account);
}

实现类

public class AccountServiceImpl implements IAccountService {
    @Override
    public List<Account> findAll() {
        System.out.println("Service：findAll...");
        return null;
    }

    @Override
    public void saveAccount(Account account) {
        System.out.println("Service：saveAccount...");

    }
}

2 Spring框架的基础搭建

2.1 applicationContext.xml的编写

步骤：

导入相关约束
添加注解扫描

<?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">
<!--    开启注解扫描，spring框架扫描service和dao层，忽略web层-->
    <context:component-scan base-package="com.example">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>
</beans>

3 Spring整合SpringMVC框架

3.1 搭建SpringMVC

步骤

在web.xml配置前端控制器
1. 配置springMVC配置文件
2. 配置随服务器启动创建对象
在web.xml配置解决中文乱码拦截器
创建SpringMVC配置文件
1. 配置注解扫描包
2. 配置视图解析器
3. 过滤静态资源
4. 开启SpringMVC的注解支持

3.1.1 web.xml

<!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>
    <!--  配置中文乱码过滤器-->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--  配置前端控制器-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--    配置springMVC配置文件-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
        <!--    配置随服务器启动创建对象-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

3.1.2 springMVC.xml

<?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-->
    <context:component-scan base-package="com.example">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

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

    <!--过滤静态资源-->
    <!-- 设置静态资源不过滤 -->
    <mvc:resources location="/css/" mapping="/css/**"/> <!-- 样式 -->
    <mvc:resources location="/images/" mapping="/images/**"/> <!-- 图片 -->
    <mvc:resources location="/js/" mapping="/js/**"/> <!-- javascript -->

    <!--    开启SpringMVC的注解支持-->
    <mvc:annotation-driven/>
</beans>

3.2 整合SpringMVC

步骤：
在web.xml中配置ContextLoaderListener监听器，随项目启动加载spring配置文件（该监听器默认加载/WEB-INF/applicationContext.xml）

3.2.1 web.xml

<!--    配置Spring监听器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--    配置加载类路径的配置文件-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

4 Spring整合Mybatis框架

4.1 搭建Mybatis

步骤：

导入约束
配置环境（数据库连接信息）
导入配置文件

4.1.1 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>
    <!--    配置环境-->
    <environments default="mysql">
        <environment id="mysql">
            <transactionManager type="JDBC"></transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///ssm?characterEncoding=UTF-8"/>
                <property name="username" value="root"/>
                <property name="password" value="admin"/>
            </dataSource>
        </environment>
    </environments>
    <!--    导入配置文件-->
    <mappers>
        <!--        配置文件-->
        <!--        <mapper resource="com/example/dao/xxx.xml"/>-->
        <!--        注解-->
        <!--        <mapper class="com.example.dao.IAccountDao"/>-->
        <!--        整包-->
        <package name="com.example.dao"/>
    </mappers>
</configuration>

4.2 整合Mybatis

步骤：

在applicationConfig.xml中加入连接池对象
配置SqlSession工厂对象
配置扫描dao的包

在applicationConfig.xml中添加以下配置

<!--配置C3P0连接池对象-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql:///ssm?characterEncoding=UTF-8"/>
        <property name="username" value="root"/>
        <property name="password" value="admin"/>
    </bean>
    <!--配置SqlSession工厂    -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
<!--配置扫描dao的包    -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.example.dao"></property>
    </bean>

5 配置Spring声明式事务管理

5.1 在applicationConfig.xml加入以下代码：

<!--配置Spring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.example.service.impl.*ServiceImpl.*(..))"/>
    </aop:config>

5.2 事务不会滚解决方法

5.2.1 原因：

xml加载的springmvc配置时扫描了所有的bean文件，其中有springmvc管理的也有spring管理的，而我们通过spring声明事务时，spring没有扫描和管理bean的配置，即没有权利，所以bean文件并不会被spring管理，所以不会错误回滚。配置文件不同管理域也不同，储存不同地方的东西，但是都可以注入文件。

5.2.2 解决方法：

将

<context:component-scan base-package="com.example">

改为

<context:component-scan base-package="com.example.controller">

SpringMVC_day03

文章目录

1 搭建整合环境

1.1 整合思路

1.2 建表

1.3 导入jar包

1.4 具体编码

1.4.1 实体类

1.5 Dao接口

1.6 Service接口与实现类

2 Spring框架的基础搭建

2.1 applicationContext.xml的编写

3 Spring整合SpringMVC框架

3.1 搭建SpringMVC

3.1.1 web.xml

3.1.2 springMVC.xml

3.2 整合SpringMVC

3.2.1 web.xml

4 Spring整合Mybatis框架

4.1 搭建Mybatis

4.1.1 SqlMapConfig.xml

4.2 整合Mybatis

5 配置Spring声明式事务管理

5.1 在applicationConfig.xml加入以下代码：

5.2 事务不会滚解决方法

5.2.1 原因：

5.2.2 解决方法：