MyEclipse2018 利用maven搭建SSM项目（二）
接上文搭建SSM项目（一），已经搭建好了maven项目，没有的同学请去
https://blog.csdn.net/heheyixiao233/article/details/82809623
配置文件真的很让人头疼，所以我会直接贴出代码以供复制粘贴，原则上没有顺序，但如果你是第一次配置，还是跟我一起配置吧
以下内容会有我个人理解，由于我也初学，以前都是用servlet-jdbc编程，所以我在理解的过程中会相互类比，如有错误，请指正
首先先设置pom文件，引入必要的jar包，版本都比较新
<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>4.0.0modelVersion>
<groupId>com.wanmaitgroupId>
<artifactId>testssmartifactId>
<version>0.0.1-SNAPSHOTversion>
<packaging>warpackaging>
<properties>
<webVersion>4.0webVersion>
<spring.version>5.0.8.RELEASEspring.version>
<mybatis.version>3.4.6mybatis.version>
<jackson.version>2.9.6jackson.version>
properties>
<dependencies>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>4.0.1version>
<scope>providedscope>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
<scope>testscope>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-coreartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-annotationsartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>${jackson.version}version>
dependency>
<dependency>
<groupId>commons-dbcpgroupId>
<artifactId>commons-dbcpartifactId>
<version>1.4version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.12version>
dependency>
<dependency>
<groupId>org.apache.logging.log4jgroupId>
<artifactId>log4j-apiartifactId>
<version>2.11.0version>
dependency>
<dependency>
<groupId>org.apache.logging.log4jgroupId>
<artifactId>log4j-coreartifactId>
<version>2.11.0version>
dependency>
<dependency>
<groupId>org.apache.logging.log4jgroupId>
<artifactId>log4j-webartifactId>
<version>2.11.0version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-coreartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-beansartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-context-supportartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-oxmartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-txartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjrtartifactId>
<version>1.9.1version>
dependency>
<dependency>
<groupId>org.aspectjgroupId>
<artifactId>aspectjweaverartifactId>
<version>1.9.1version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>${mybatis.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>1.3.2version>
dependency>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelperartifactId>
<version>4.2.1version>
dependency>
<dependency>
<groupId>commons-fileuploadgroupId>
<artifactId>commons-fileuploadartifactId>
<version>1.3.3version>
dependency>
<dependency>
<groupId>commons-iogroupId>
<artifactId>commons-ioartifactId>
<version>2.6version>
dependency>
<dependency>
<groupId>commons-codecgroupId>
<artifactId>commons-codecartifactId>
<version>1.11version>
dependency>
<dependency>
<groupId>org.apache.commonsgroupId>
<artifactId>commons-lang3artifactId>
<version>3.8version>
dependency>
dependencies>
<build/>
project>
配置好了ctrl+s保存，会自动下载依赖的jar包
这部分注意两点
1.首先由于我使用spring5.0.8（现在的最新版），所以没有使用log4j，而使用lo4j2，反正我用log4j配置会过期，详细信息看
https://blog.csdn.net/hlx20080808/article/details/81062084
2.我的数据库连接的jar包mysql-connector是8.0.12而不是5.*的版本，所以后面连接数据库的写法不一样，要注意（很多人写法对应不上版本，明明连接不上数据库这不误导新人吗）
配置好了pom文件我们再在src/main/java下建几个包
- controller控制器包，相当于JDBC编程中的servlet包
- entity对象包，相当于vo包，也有地方叫pojo，如果是新手不建议一上来用MyBatis逆向工程生成，反正我生成失败了
- mapper包，映射包，放Mybatis映射接口的，我写MyBatis用注解（主要是看到的教程用注解，而写我觉得注解是趋势，xml有点麻烦）
- service包，放service接口
- service下的impl包，service的实体包，
个人理解：上面三个包才相当于以前的Dao，service和impl两个包就相当于以前的单一实例，不会new新的对象，因为接口对应只有一个实体对象
说这些是为了大家能看懂注释的地方，将相应的包改成自己项目的包
包，建好的目录结构如下
注意：service包和service.impl合并了，但实际上是两个包，建立对象的时候我会建在两个包中，这个MyEclipse可以设置成不合并，但我没找到
然后在下面src/main/resources文件中建立配置文件，你可以一个一个配置，也可以先建好，再往里配置内容
首先设置jdbc.properties
driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/wetalk?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT%2B8&useSSL=false
username=root
password=123456
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
注释的很清楚，注意driver和url，刚才我说连接数据库的jar包，以上是8.0.12的写法，如果是5.*的，应该是
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/wetalk?useUnicode=true&characterEncoding=UTF-8
看清楚差别，否则连接数据库会有问题，另外别忘了修改用户名密码以及库名
然后是spring-mvc.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xsi:schemaLocation="http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
<context:component-scan base-package="com.wanmait.wetalk.controller" />
<mvc:annotation-driven />
<mvc:default-servlet-handler />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/value>
property>
<property name="suffix">
<value>.jspvalue>
property>
bean>
<bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="defaultEncoding" value="utf-8" />
<property name="maxUploadSize" value="52428800" />
<property name="maxInMemorySize" value="40960" />
<property value="true" name="resolveLazily"/>
bean>
beans>
注意修改扫描包名，这里我上传文件设置的大小是50M
然后是log4j2.xml
<Configuration status="OFF" monitorInterval="1800">
<properties>
<property name="LOG_HOME">/WEB-INF/logsproperty>
<property name="FILE_NAME">finance-payproperty>
properties>
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n" />
Console>
<RollingFile name="running-log" fileName="${LOG_HOME}/${FILE_NAME}.log"
filePattern="${LOG_HOME}/$${date:yyyy-MM}/${FILE_NAME}-%d{yyyy-MM-dd}-%i.log.gz"
immediateFlush="true">
<PatternLayout
pattern="%date{yyyy-MM-dd HH:mm:ss.SSS} %level [%thread][%file:%line] - %msg%n" />
<Policies>
<TimeBasedTriggeringPolicy />
<SizeBasedTriggeringPolicy size="10 MB" />
Policies>
<DefaultRolloverStrategy max="20" />
RollingFile>
Appenders>
<Loggers>
<Root level="info">
<AppenderRef ref="running-log" />
<AppenderRef ref="Console" />
Root>
Loggers>
Configuration>
log4j2是打印日志的，这个我还没学到，原样写总不会错，没啥需要改的，不需要也能启动成功
最后是applicationContext.xml配置上下文环境
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xsi:schemaLocation="http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-4.3.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd">
<mybatis:scan base-package="com.wanmait.wetalk.mapper" />
<context:component-scan base-package="com.wanmait.wetalk" />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="initialSize" value="${initialSize}">property>
<property name="maxActive" value="${maxActive}">property>
<property name="maxIdle" value="${maxIdle}">property>
<property name="minIdle" value="${minIdle}">property>
<property name="maxWait" value="${maxWait}">property>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"
p:dataSource-ref="dataSource" />
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<tx:annotation-driven transaction-manager="transactionManager" />
beans>
注意有两个地方需要修改包名，还有刚才jdbc的设置
最后离成功只有一步了，那就是web.xml的配置
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">
<display-name>wetalkdisplay-name>
<welcome-file-list>
<welcome-file>index.htmlwelcome-file>
<welcome-file>index.htmwelcome-file>
<welcome-file>index.jspwelcome-file>
<welcome-file>default.htmlwelcome-file>
<welcome-file>default.htmwelcome-file>
<welcome-file>default.jspwelcome-file>
welcome-file-list>
<display-name>Archetype Created Web Applicationdisplay-name>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:applicationContext.xmlparam-value>
context-param>
<servlet>
<servlet-name>springmvcservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring-mvc.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>springmvcservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>characterEncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>characterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<listener>
<listener-class>org.apache.logging.log4j.web.Log4jServletContextListenerlistener-class>
listener>
<filter>
<filter-name>log4jServletFilterfilter-name>
<filter-class>org.apache.logging.log4j.web.Log4jServletFilterfilter-class>
filter>
<filter-mapping>
<filter-name>log4jServletFilterfilter-name>
<url-pattern>/*url-pattern>
<dispatcher>REQUESTdispatcher>
<dispatcher>FORWARDdispatcher>
<dispatcher>INCLUDEdispatcher>
<dispatcher>ERRORdispatcher>
filter-mapping>
web-app>
粘贴的注意一下对应配置文件的名字，这个地方我对log4j2还是有些疑惑，感觉其实没有映射上去，暂时先这样写吧，反正影响不大…以后如果学了我会再修改
最后在右键点一下项目，最后properties，选择红色框中所选，点击Add
选择框中所选，点next
点击Maven 点击finish
最后
最后的步骤相当于将maven下载的jar包添加到构建路径
这样理论上就搭建完成了，接下来测试一下能不能成功
先在WEB-INF/jsp下建立一个User文件夹，在建立一个login.jsp
里面写了一句话“测试一下能不能跳转到登陆页面 ”
然后在controller包下建立一个UserController
目录结构如下
Controller写
package com.wanmait.wetalk.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
@RequestMapping("/User")
public class UserController {
@RequestMapping("/login")
public void login(){
}
}
就是一个转发的控制器
保存好然后添加到tomcat中，启动服务器，在地址栏中输入
http://127.0.0.1:8080/wetalk/User/login
如果跳转，则搭建成功，失败的话，再来一次吧…
