SSM整合经验

SSM项目整合经验

spring整合springweb mvc

因为springwebmvc是spring的一个模块，所以整合起来无缝衔接，只需要在spring配置文件中

需要导入的基本依赖

<!--        导入spring-webmvc-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.23</version>
        </dependency>
<!--        导入spring的核心依赖包-->
        <!-- https://mvnrepository.com/artifact/org.springframework/spring-context -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.3.20</version>
        </dependency>

在spring配置文件中的配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:p="http://www.springframework.org/schema/p" xmlns:util="http://www.springframework.org/schema/util"
       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/mvc
	   http://www.springframework.org/schema/mvc/spring-mvc.xsd
	    http://www.springframework.org/schema/p
	   http://www.springframework.org/schema/p/spring-p.xsd
	   http://www.springframework.org/schema/aop
   	   http://www.springframework.org/schema/aop/spring-aop.xsd

	    http://www.springframework.org/schema/util https://www.springframework.org/schema/util/spring-util.xsd">

    <context:component-scan base-package="com.chen.controller"/>
    <context:component-scan base-package="com.chen.MyCharset"/>

    <mvc:annotation-driven>
        //这个是解决乱码的
<!--        <mvc:message-converters>-->
<!--            <bean class="org.springframework.http.converter.StringHttpMessageConverter">-->
<!--                <property name="defaultCharset" value="UTF-8"/>-->

<!--            </bean>-->
<!--        </mvc:message-converters>-->
    </mvc:annotation-driven>
    <mvc:default-servlet-handler/>
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
        <property name="prefix" value="/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

在web.xml中配置dispatcherservlet

<?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">
    
    
    <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:ApplicationContext.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>
    
    
    
</web-app>

spring整合mybatis

需要导入的基本依赖

<!--        mysql驱动-->
        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.31</version>
        </dependency>
<!--        导入mybatis-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.9</version>
        </dependency>
<!--        导入mybatis-spring的整合包-->
        <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
<!--        导入druid数据池-->
        <!-- https://mvnrepository.com/artifact/com.alibaba/druid -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.8</version>
        </dependency>

在spring配置文件中的基本配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       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/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
		">
    <context:component-scan base-package="com.chen.dao"/>
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <bean class="com.alibaba.druid.pool.DruidDataSource" id="dataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>

    <bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
        <property name="dataSource" ref="dataSource"/>
        <property name="mapperLocations" value="classpath:com/chen/dao/BlogMapper.xml"/>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="com.chen.dao"/>
    </bean>


</beans>

jdbc的配置文件

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/clt?characterEncoding=UTF-8&useSSL=false&serverTimezone=UTC
jdbc.username=root
jdbc.password=7536951

解决乱码的几种方式

在每一个处理方法上加上 produces = "text/html;charset=UTF-8"

直接在StringHttpMessageConverter设置defaultcharset=UTF-8，默认为ISO..

    <mvc:annotation-driven>
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="defaultCharset" value="UTF-8"/>

            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

利用BeanPostProcessor在StringHttpMessageConverter这个bean实例化之后改变defaultCharset,并注入到IOC容器中覆盖默认的StringHttpMessageConverter

package com.chen.MyCharset;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.http.MediaType;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.stereotype.Component;

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.List;

@Component
public class CharsetUTF8 implements BeanPostProcessor {

    @Override
    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
        return BeanPostProcessor.super.postProcessBeforeInitialization(bean, beanName);
    }

    @Override
    public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {

        if (bean instanceof StringHttpMessageConverter){

            System.err.println("=========================================");
            List<MediaType> mediaTypes = new ArrayList<>();
            mediaTypes.add(new MediaType("application","json", Charset.forName("UTF-8")));
            ((StringHttpMessageConverter) bean).setSupportedMediaTypes(mediaTypes);

        }

        return bean;
    }
}

posted @ 2023-02-25 16:42 在赶路的我阅读(4) 评论(0) 编辑收藏举报

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