Java ssm框架整合

时间:2022-06-02 仰望星空的快乐人气:0

1.springmvc

和只有spring-mvc时一样，web.xml spring-mvc.xml

spring-mvc.xml

<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/cache"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
<!--    注解驱动-->
    <mvc:annotation-driven/>
<!--    静态资源过滤-->
<!--    开启jsp专用的视图控制器 internalresourceresoler-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--    设置前缀-->
        <property name="prefix" value="/WEB-INF/templates/"></property>
        <!--    设置后缀-->
        <property name="suffix" value=".jsp"></property>
    </bean>
<!--    扫描 controller注解-->
    <context:component-scan base-package="com.hxut.rj1192.zyk.Controller"></context:component-scan>
</beans>

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">
<!--    设置拦截器，解决参数乱码，一定要在设置HiddenHttpMethodFilter请求前，要在其他拦截器和servlet执行前设置编码-->
    <filter>
        <filter-name>paramencoding</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>
<!--        解决返回的请求数乱码  response-->
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
<!--拦截所有页面-->
    <filter-mapping>
        <filter-name>paramencoding</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
<!--servlet 将所有除了jsp的页面拦截，交给dispatcherservlet视图控制器，并设置dispatcherservlet的xml文件的位置-->
    <servlet-mapping>
        <servlet-name>all</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <servlet>
        <servlet-name>all</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:Spring-springmvc.xml</param-value>
        </init-param>
    </servlet>
<!-- 拦截所有请求，并交给hiddenhttpmethodfilter 检测否是post请求，且_method不为空，如果是，就将请求类型改为_method的值-->
    <filter>
        <filter-name>hiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>hiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

2.spring-dao.xml与mybatis-config.xml

主要就是spring整合mybatis

spring整合mybatis

在上面的基础上，去掉成接口的实现类了，需要配置dao接口扫描包，我的理解是这个dao接口扫描包中有datasource，有mapper的扫描范围, 它会自动生成这些接口对应的mapper,并将接口的mapper放到xml文件中，所以在spring-service中，直接

<property name="bookmapper" ref="bookmapper"></property>

引用即可

<?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
       https://www.springframwork.org/schema/context/spring-context.xsd">
    <!-- 读取数据库配置文件-->
    <context:property-placeholder location="classpath:database.properties"></context:property-placeholder>
    <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}"/>
        <property name="maxPoolSize" value="30"/>
        <property name="minPoolSize" value="10"/>
        <!-- 关闭连接后不自动commit -->
        <property name="autoCommitOnClose" value="false"/>
        <!-- 获取连接超时时间 -->
        <property name="checkoutTimeout" value="10000"/>
        <!-- 当获取连接失败重试次数 -->
        <property name="acquireRetryAttempts" value="2"/>
    </bean>
    <bean id="sqlsessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
    </bean>
<!--配置dao接口扫描包 ，动态的实现了dao接口可以注入到spring容器中
  就是用来代替BookMapperImpl类 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--        注入sqlsessionfactory-->
<!--个人理解,这个dao接口扫描包中有datasource，有mapper的扫描范围,
它会自动生成这些接口对应的mapper,并将接口的mapper放到xml文件中，所以在spring-service中，直接
   <property name="bookmapper" ref="bookmapper"></property> 引用即可-->
        <property name="sqlSessionFactoryBeanName" value="sqlsessionFactory"></property>
<!--        要扫描的dao包, 会自动生成包下的类的接口的实现类-->
        <property name="basePackage" value="com.hxut.rj1192.zyk"></property>
    </bean>
</beans>

mybatis-config.xml 详细在上面的mybatis整合spring的文章中，它做两件事，配置映射文件路径，配置接口扫描范围，它被import到 spring-dao.xml中。

<?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>
<!--    配置数据源交给spring了-->
    <!--    给类起别名-->
    <typeAliases>
        <package name="com.hxut.rj1192.zyk.mapper"/>
    </typeAliases>
    <!--    设置映射文件路径-->
    <mappers>
        <mapper resource="com/hxut/rj1192/zyk/mapper/Bookmapper.xml"></mapper>
    </mappers>
</configuration>

3.spring-service.xml

在这个文件中要进行事务的处理（事务本来就应该是在service层），要将service层的类全部放到ioc容器中，然后这些类中因为调用了dao层的类，然后因为刚才第二部配置了接口扫描包，直接ref获取mapper即可

<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
       https://www.springframwork.org/schema/context/spring-context.xsd">
<!--    开启注解驱动-->
    <context:component-scan base-package="com.hxut.rj1192.zyk.service"></context:component-scan>
    <bean id="booksServiceimpl" class="com.hxut.rj1192.zyk.service.BooksServiceimpl">
        <property name="bookmapper" ref="bookmapper"></property>
    </bean>
<!--    声明式事务-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--       注入数据源 -->
        <property name="dataSource" ref="dataSource"></property>
    </bean>
</beans>

4.引用

将这些文件的引用放到一个大的xml文件中，这个文件只放引用，这样就很容易看

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       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">
    <import resource="applicationContext.xml"></import>
    <import resource="spring-dao.xml"></import>
    <import resource="Spring-Service.xml"></import>
    <import resource="Spring-springmvc.xml"></import>
</beans>

或者在project structure中设置 spring application context，效果是一样的

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