最优雅地整合 Spring & Spring MVC & MyBatis 搭建 Java 企业级应用(附源码)

Posted by 暮夏有五 on 2021-01-19
Estimated Reading Time 23 Minutes
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这里使用 Maven 项目管理工具构建项目

初始化项目


打开 Intellij IDEA,点击 Create New Project,使用 Maven 构建项目,选择 JDK 版本和 maven-archetype-webapp 模板(Java Web 项目)

填写项目在 Maven 仓库中的坐标

选择 Maven 安装路径和 Maven 配置文件路径以及 Maven 本地仓库路径

填写项目名,选择工作目录

创建目录


src > main 目录下分别新建 java 源码目录 和 resource 配置文件目录

java 目录下创建基本的源码目录结构

webapp 目录下创建 static 目录,用于存放静态资源文件(css, js, img 等)

webapp > WEB-INF 目录下创建 views 目录,用于存放视图页面(jsp, html 等)

pom.xml


完整的 pom.xml 配置如下

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<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.antoniopeng</groupId>
<artifactId>ssm-example</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>

<name>hello-ssm Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>https://antoniopeng.com</url>

<properties>
<!-- 环境配置 -->
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>

<!-- 统一的依赖管理 -->
<alibaba-druid.version>1.1.6</alibaba-druid.version>
<apache-httpclient.version>4.5.5</apache-httpclient.version>
<commons-email.version>1.5</commons-email.version>
<commons-fileupload.version>1.3.2</commons-fileupload.version>
<commons-lang3.version>3.5</commons-lang3.version>
<hibernate-validator.version>5.3.4.Final</hibernate-validator.version>
<jackson.version>2.9.5</jackson.version>
<jstl.version>1.2</jstl.version>
<junit.version>4.12</junit.version>
<kaptcha.version>2.3</kaptcha.version>
<log4j.version>1.2.17</log4j.version>
<lombok.version>1.16.18</lombok.version>
<mybaits-spring.version>1.3.1</mybaits-spring.version>
<mybatis.version>3.2.8</mybatis.version>
<mysql.version>5.1.46</mysql.version>
<servlet-api.version>3.1.0</servlet-api.version>
<slf4j.version>1.7.25</slf4j.version>
<spring.version>4.3.17.RELEASE</spring.version>
</properties>

<dependencies>
<!-- Test Begin -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
</dependency>
<!-- Test Begin -->

<!-- Spring Begin -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</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-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Spring End -->

<!-- Servlet Begin -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<!-- Servlet End -->

<!-- Log Begin -->
<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>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jul-to-slf4j</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<!-- Log End -->

<!-- Commons Begin -->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons-fileupload.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-email</artifactId>
<version>${commons-email.version}</version>
</dependency>
<!-- Commons End -->

<!-- Database Begin -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${alibaba-druid.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybaits-spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate-validator.version}</version>
</dependency>
<!-- Database End -->

<!-- Json Begin -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- Json End -->

<!-- Apache Http Begin -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${apache-httpclient.version}</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>fluent-hc</artifactId>
<version>${apache-httpclient.version}</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpmime</artifactId>
<version>${apache-httpclient.version}</version>
</dependency>
<!-- Apache Http End -->

<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
</dependency>
</dependencies>

<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
</plugins>
</pluginManagement>

<plugins>
<!-- Compiler 插件, 设定 JDK 版本 -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.7.0</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<encoding>${project.build.sourceEncoding}</encoding>
<showWarnings>true</showWarnings>
</configuration>
</plugin>
</plugins>

<!-- 资源文件配置 -->
<resources>
<resource>
<directory>src/main/java</directory>
<excludes>
<exclude>**/*.java</exclude>
</excludes>
</resource>
<resource>
<directory>src/main/resources</directory>
</resource>
</resources>
</build>
</project>

全局配置文件


resources 目录下创建 ssm.properties 全局配置文件,供后续调用

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# JDBC
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.connectionURL=jdbc:mysql://localhost:3306/ssm?useUnicode=true&characterEncoding=utf-8&useSSL=false
jdbc.username=root
jdbc.password=123456

# JDBC Pool
jdbc.pool.init=1
jdbc.pool.minIdle=3
jdbc.pool.maxActive=20

# Web View Location
web.view.prefix=/WEB-INF/views/
web.view.suffix=.jsp

# Upload Size
web.maxUploadSize=10485760

Spring 核心配置


resources 目录下创建 spring-context.xml

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<?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: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/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<!-- 开启 Spring 相关注解 -->
<context:annotation-config />

<!-- 使用 Annotation 自动注册 Bean, 并且只扫描 @Controller -->
<context:component-scan base-package="com.antoniopeng.hello.ssm">
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
</context:component-scan>

<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>

<!-- 开启事务注解驱动 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

整合 Spring MVC


创建 spring-mvc.xml

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<?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:mvc="http://www.springframework.org/schema/mvc"
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">

<!-- 加载配置属性文件 -->
<context:property-placeholder ignore-unresolvable="true" location="classpath:ssm.properties"/>

<!-- 使用 Annotation 自动注册 Bean,只扫描 @Controller -->
<context:component-scan base-package="com.antoniopeng.hello.ssm.controller" use-default-filters="false">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>

<!-- 默认的注解映射的支持 -->
<mvc:annotation-driven />

<!-- 定义视图文件解析 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="${web.view.prefix}"/>
<property name="suffix" value="${web.view.suffix}"/>
</bean>

<!-- 静态资源映射 -->
<mvc:resources mapping="/static/**" location="/static/" cache-period="31536000"/>

<!-- 拦截器配置 -->
<mvc:interceptors>
<!-- 拦截登录 -->
<mvc:interceptor>
<mvc:mapping path="/**"/>
<mvc:exclude-mapping path="/login" />
<mvc:exclude-mapping path="/static/**" />
<bean class="com.antoniopeng.hello.ssm.interceptor.LoginInterceptor" />
</mvc:interceptor>
</mvc:interceptors>

<!-- 上传文件拦截,设置最大上传文件大小 10M = 10*1024*1024(B) = 10485760 bytes -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxUploadSize" value="${web.maxUploadSize}"/>
</bean>

</beans>

MyBatis 配置


创建 mybatis-config.xml

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<?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>
<!-- 全局参数 -->
<settings>
<!-- 打印 SQL 语句 -->
<setting name="logImpl" value="STDOUT_LOGGING" />

<!-- 使全局的映射器启用或禁用缓存。 -->
<setting name="cacheEnabled" value="false"/>

<!-- 全局启用或禁用延迟加载。当禁用时,所有关联对象都会即时加载。 -->
<setting name="lazyLoadingEnabled" value="true"/>

<!-- 当启用时,有延迟加载属性的对象在被调用时将会完全加载任意属性。否则,每种属性将会按需要加载。 -->
<setting name="aggressiveLazyLoading" value="true"/>

<!-- 是否允许单条 SQL 返回多个数据集 (取决于驱动的兼容性) default:true -->
<setting name="multipleResultSetsEnabled" value="true"/>

<!-- 是否可以使用列的别名 (取决于驱动的兼容性) default:true -->
<setting name="useColumnLabel" value="true"/>

<!-- 允许 JDBC 生成主键。需要驱动器支持。如果设为了 true,这个设置将强制使用被生成的主键,有一些驱动器不兼容不过仍然可以执行。 default:false -->
<setting name="useGeneratedKeys" value="false"/>

<!-- 指定 MyBatis 如何自动映射 数据基表的列 NONE:不映射 PARTIAL:部分 FULL:全部 -->
<setting name="autoMappingBehavior" value="PARTIAL"/>

<!-- 这是默认的执行类型 (SIMPLE: 简单; REUSE: 执行器可能重复使用prepared statements语句;BATCH: 执行器可以重复执行语句和批量更新) -->
<setting name="defaultExecutorType" value="SIMPLE"/>

<!-- 使用驼峰命名法转换字段。 -->
<setting name="mapUnderscoreToCamelCase" value="true"/>

<!-- 设置本地缓存范围 session:就会有数据的共享 statement:语句范围 (这样就不会有数据的共享 ) defalut:session -->
<setting name="localCacheScope" value="SESSION"/>

<!-- 设置 JDBC 类型为空时,某些驱动程序 要指定值, default:OTHER,插入空值时不需要指定类型 -->
<setting name="jdbcTypeForNull" value="NULL"/>
</settings>
</configuration>

整合 Druid


resources 目录下创建 spring-context-druid.xml

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<?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">

<!-- 加载配置属性文件 -->
<context:property-placeholder ignore-unresolvable="true" location="classpath:ssm.properties"/>

<!-- 数据源配置, 使用 Druid 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- 数据源驱动类可不写,Druid默认会自动根据URL识别DriverClass -->
<property name="driverClassName" value="${jdbc.driverClass}"/>

<!-- 基本属性 url、user、password -->
<property name="url" value="${jdbc.connectionURL}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>

<!-- 配置初始化大小、最小、最大 -->
<property name="initialSize" value="${jdbc.pool.init}"/>
<property name="minIdle" value="${jdbc.pool.minIdle}"/>
<property name="maxActive" value="${jdbc.pool.maxActive}"/>

<!-- 配置获取连接等待超时的时间 -->
<property name="maxWait" value="60000"/>

<!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000"/>

<!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="300000"/>

<!-- 配置监控统计拦截的filters -->
<property name="filters" value="stat"/>
</bean>
</beans>

整合 MyBatis


resources 目录下创建 spring-context-mybatis.xml

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<?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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

<!-- 配置 SqlSession -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 用于配置对应实体类所在的包,多个 package 之间可以用 ',' 号分割 -->
<property name="typeAliasesPackage" value="com.antoniopeng.hello.ssm.entity"/>
<!-- 用于配置对象关系映射配置文件所在目录 -->
<property name="mapperLocations" value="classpath*:/mapper/**/*.xml"/>
<property name="configLocation" value="classpath:/mybatis-config.xml"></property>
</bean>

<!-- 扫描 Mapper -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.antoniopeng.hello.ssm.dao" />
</bean>
</beans>

日志配置


创建 log4j.properties 日志配置文件

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log4j.rootLogger=error, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[service] %d - %c -%-4r [%t] %-5p %c %x - %m%n

log4j.logger.com.ibatis = debug
log4j.logger.com.ibatis.common.jdbc.SimpleDataSource = debug
log4j.logger.com.ibatis.common.jdbc.ScriptRunner = debug
log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate = debug
log4j.logger.java.sql.Connection = debug
log4j.logger.java.sql.Statement = debug
log4j.logger.java.sql.PreparedStatement = debug
log4j.logger.java.sql.ResultSet =debug
log4j.logger.com.pro.mapper =debug

web.xml


完整的 web.xml 配置如下:

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<?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_3_1.xsd"
version="3.1">

<welcome-file-list>
<welcome-file>/login</welcome-file>
</welcome-file-list>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-context*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<filter>
<filter-name>encodingFilter</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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<servlet>
<servlet-name>springServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

</web-app>

创建访问视图


webapp > WEB-INF > views 目录下新建 index.jsp

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Index</title>
</head>

<body>
<h1>
Hello SSM
</h1>
</body>
</html>

controller 目录下创建 IndexController

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package com.antoniopeng.hello.ssm.controller;

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

@Controller
public class IndexController {

@RequestMapping(value = "/")
public String index() {
return "index";
}
}

部署到 Tomcat 服务器


点击 Intellij IDEA 右上方 Add Configuration..

添加 Tomcat 本地服务器配置

配置下载好的 Tomcat 服务器

Tomcat8 官网下载地址

设置访问端口号,默认 8080

将项目添加到 Tomcat 服务器

最后运行项目,访问 http://localhost:8080/ 即可。

源码地址:https://github.com/antoniopeng/ssm-example.git

更多干货请移步:https://antoniopeng.com


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