SSM框架集成(附源碼)

簡述

SSM框架的集成主要是Spring和MyBatis的集成,SpringMVC和Spring自然集成。html

1.在IDEA新建一個Maven項目

建立maven項目

圖1. 建立web-app

1.2 建立確實的文件夾,結構以下
目錄結構
java

圖2.文件夾結構

2.添加相關依賴

2.1 配置pom.xmlmysql

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <!--自定義一個版本變量,方便更新版本-->
    <spring.version>5.1.5.RELEASE</spring.version>
    <mybatis.version>3.4.6</mybatis.version>
    <c3p0.version>0.9.5.4</c3p0.version>
</properties>
<dependencies>
    <!-- 默認的idea建立的依賴版本是4.11,後續集成測試時,提示Junit的版本太低,至少須要4.12 -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
    </dependency>
    <!--Spring核心包-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</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>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <!--Spring的依賴添加結束,若有其餘需求請自行添加-->
    <!--MyBatis核心包-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>${mybatis.version}</version>
    </dependency>
    <!--MyBatis依賴包到此結束-->
    <!--Spring-Mybatis集成的依賴-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.2</version>
    </dependency>
    <!--Spring集成Mybatis的依賴結束-->
    <!--用於鏈接數據庫的依賴,這裏來鏈接MySQL,其餘數據庫自行更換包-->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.15</version>
    </dependency>
    <!--數據鏈接池選擇c3p0-->
    <dependency>
        <groupId>com.mchange</groupId>
        <artifactId>c3p0</artifactId>
        <version>${c3p0.version}</version>
    </dependency>
    <!--數據庫相關到此結束-->
    <!--JavaWeb須要的-->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.1.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>
    <!--簡化代碼的依賴-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.8</version>
        <scope>provided</scope>
    </dependency>
    <!--Spring的測試包-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
        <scope>test</scope>
    </dependency>
</dependencies>
圖3.pom.xml

2.2 建立數據庫git

CREATE DATABASE `test`;
USE `test`;
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(10) NOT NULL AUTO_INCREMENT,
  `name` varchar(20) NOT NULL,
  `password` varchar(20) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=latin1;
圖4.test數據庫的建立sql

3.Spring與Mybatis集成

3.1 在resources/spring下建立一個applicationContext.xml並配置以下web

<?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 http://www.springframework.org/schema/context/spring-context.xsd">
    <!--配置自動掃描-->
    <!--
        context:component-scan 會自動掃描當前包及其子包,
        而且每個context:componment-scan都會生成一個bean,
        當在後續的SpringMVC中須要配置控制器,因此不排除Controller和RestController註解,
        就會掃描到兩個同類型的bean,致使Spring不知道要裝配那個bean。
    -->
    <context:component-scan base-package="cn.edu.nit">
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:exclude-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController"/>
    </context:component-scan>
    <!--用於管理整個Spring上下文-->
    <import resource="classpath:spring/spring-*.xml"/>
</beans>
圖5. applicationContext.xml

3.2 在resources下建立一個jdbc.properties並配置以下(user和password根據本身數據庫而定)spring

jdbc.url=jdbc:mysql://localhost:3306/test?useSSL=true&serverTimezone=GMT%2B8
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.user=developer
jdbc.password=123456
圖6.jdbc.properties

3.3 在resources/spring下建立一個spring-mybatis.xml並配置以下sql

<?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 http://www.springframework.org/schema/context/spring-context.xsd">
    <!--配置數據源-->
    <!--1. 先加載數據庫的配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--2.配置DataSource,採用c3p0的-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.url}"/>
        <property name="driverClass" value="${jdbc.driver}"/>
        <property name="user" value="${jdbc.user}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>
    <!--配置Spring事務用於管理Mybatis的DataSource-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!--配置MyBatis-->
    <!--1. 自動掃描mapper.xml文件和會話工廠,配置mapper是操做那個數據源-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--注意:這裏是Mapperlocations,不是configLocation-->
        <property name="mapperLocations" value="classpath:cn/edu/nit/mapper/*.xml"/>
    </bean>
    <!--2.自動掃描Mapper層的接口-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="basePackage" value="cn.edu.nit.mapper"/>
    </bean>
</beans>
圖7.spring-mybatis.xml

3.4 測試一下Spring和MyBatis的集成環境數據庫

package cn.edu.nit.test;

import cn.edu.nit.pojo.User;
import cn.edu.nit.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@ContextConfiguration(locations = {"classpath:spring/applicationContext.xml"})
@RunWith(SpringJUnit4ClassRunner.class)
public class SpringMyBatisTest {
    @Autowired
    private UserService userService;
    @Test
    public void t1(){
        User user = new User();
        user.setName("developer");
        user.setPassword("123456");
        userService.insertUser(user);
    }
}
圖8.測試Spring和MyBatis的集成類
  • 文檔結構均出現變化,測試結果如圖9。

圖9.SpringMybatis集成測試結果圖

4.配置SpringMVC和Tomcat

4.1配置SpringMVCexpress

  • 在resources文件夾下建立springmvc.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: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 http://www.springframework.org/schema/context/spring-context.xsd">
    <!--1.掃描控制層的控制器-->
    <context:component-scan base-package="cn.edu.nit">
        <!--include-filter是隻掃描有這個註解的-->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
        <context:include-filter type="annotation" expression="org.springframework.web.bind.annotation.RestController"/>
    </context:component-scan>
    <!--2.配置內部視圖解析器-->
    <!--轉發的時候會通過,重定向不會-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>
圖10. springmvc.xml
  • 向resources/spring/applicationContext.xml添加一下配置
<import resource="classpath:springmvc.xml"/>
圖11.向resources/spring/applicationContext.xml添加的代碼
  • 在WEB-INF/web.xml中配置springmvc
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
         version="3.0">
    <display-name>Archetype Created Web Application</display-name>
    <!--配置上下文配置文件地址-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext.xml</param-value>
    </context-param>
    <!--配置Spring上下文加載監聽器,-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--配置springmvc攔截器-->
    <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!--如下的是一些優化的不是必要的的,視狀況而定-->
    <!--編碼過濾器-->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>utf-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--配置Spring內存溢出監聽器-->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>
圖12.WEB-INF/web.xml

4.2.配置運行時環境(容器)
配置Tomcat
api

圖13.配置Tomcat

5.測試運行結果

5.1測試結果

圖14./user/query viewName = "show" 的結果


圖15./user/query viewName="redirect:/jsp/show.jsp"的結果

注:圖14中是請求轉發,因此瀏覽器的地址欄是 http://localhost:8080/user/query ,而圖15中是重定向,地址欄是http://localhost:8080/jsp/show.jsp,而且數據在第二次發起請求時丟失了。

6.相關 Exception & Error 提示

  • 6.1 . org.springframework.beans.factory.BeanCreationException
    提示 1: ,每一個component-scan會掃描一遍Spring上下文,並建立一個Bean,若是有多個component-scan掃描,那麼這些component-scan掃描到的交集 中就會出現多個相同類型的Bean,最後致使Spring不知道怎麼注入,故拋出異常。
    提示 2 : web.xml 中 applicationContext.xml沒有掃描到全部的註解,最後也會拋出BeanCreationException,springmvc.xml中配置@Controller和@RestController纔會生效。也能夠所有配置在一個spring文件中,只要能解決問題就行,愛怎麼配就怎麼配
<context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring/applicationContext.xml</param-value>
    </context-param>
  • 6.2 jstl相關 打不出來的問題
    提示:檢查一下uri <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

7.完整代碼

8.參考文檔及其餘

9.其餘

  • 轉載在參考文檔中代表便可。
  • 相關問題能夠在源碼地址中反應。
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