IDEA:maven+springMVC+Tomcat搭建web项目
自安装了IDEA后，想要通过maven+springMVC搭建一个web项目
准备：IDEA、Tomcat、JDK、maven，Chrome浏览器
我使用的是apache-tomcat-8.0.41
1、首先新建project，选择maven，打勾“create from archetype”选项，**选择“maven-archetype-webapp”**然后进入Next
如图：
2、进入下一步后，设置项目名和存储位置。如图
3、进入下一步后，设置本地Maven路径、配置文件和本地库。
我这里是自己下载的maven，也可以使用自带的，就啥也不用改。
具体操作：https://blog.csdn.net/weixin_44756334/article/details/105716064
操作完之后设置如图：
3-1后面更新：
第二次新建项目之后发现没有src目录，太尴尬了，上网查了一下，我就在这一步多加了一步：添加archetypeCatalog=internal，这个需要每次都去添加，可以去网上找其他方法。然后finish之后目录就正常了。
4、完成后界面如图：
5、开始编写pom.xml文件，导入常规Jar包
具体代码：
<?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>org.example</groupId>
<artifactId>test</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>test Maven Webapp</name>
<!-- FIXME change it to the project's website -->
<url>http://www.example.com</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
<maven.compiler.encoding>UTF-8</maven.compiler.encoding>
</properties>
<dependencies>
<dependency>
<groupId>dom4j</groupId>
<artifactId>dom4j</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.8</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.9.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>commons-pool</groupId>
<artifactId>commons-pool</artifactId>
<version>1.6</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.18.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>5.1.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.0.1</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.0.2</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<dependency>
<groupId>com.aliyun.oss</groupId>
<artifactId>aliyun-sdk-oss</artifactId>
<version>3.4.2</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.1</version>
</dependency>
<dependency>
<groupId>org.hibernate.validator</groupId>
<artifactId>hibernate-validator</artifactId>
<version>6.0.13.Final</version>
</dependency>
<dependency>
<groupId>com.microsoft.sqlserver</groupId>
<artifactId>mssql-jdbc</artifactId>
<version>6.1.0.jre8</version>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.6.0</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.3</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>test</finalName>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
输入完成后，点击项目右键-maven-Reimport
（如果在前面maven配置中已下载Jar包，则可继续下一步，否则等他慢慢下载，直至pom.xml没有爆红现象）
完成以上配置，则maven配置完成，下面开始SpringMVC配置
1、点击项目右键-Add Frameworks Support
发现里面没有SpringMVC，关闭，打开project structure。在界面右上角
2、打开后，选择Modules,点击右侧Spring，再点击移除
3、移除后点击右下角OK关闭。
然后重新打开Add Frameworks Support，里面就有springMVC了。
选择它，点击OK。
完成之后会发现目录下多了两个文件。
4、在main目录下新建java和resources文件夹，并在project structure里更改文件夹属性。
设置完成后如图(第4步先分别点击文件，再分别点击上排的Sources和Resources）
5、如图新建以下文件：（SpringMVC目录结构）
db.proerties文件代码：（我这里使用的是sqlserver，用户名和密码要改成自己的，DatabaseName要改成自己的数据库）
username=knott
password=knott
dburl=jdbc\:sqlserver\://localhost\:1433;DatabaseName\=school
driverclass=com.microsoft.sqlserver.jdbc.SQLServerDriver
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#最大空闲
maxIdle=20
#最小空闲
minIdle=1
#最长等待时间
maxWait=60000
log4j.proerties文件代码：
log4j.rootLogger = DEBUG,systemOut,logDailyFile
log4j.logger.org.apache=DEBUG
#输出到控制台
log4j.appender.systemOut = org.apache.log4j.ConsoleAppender
log4j.appender.systemOut.layout = org.apache.log4j.PatternLayout
log4j.appender.systemOut.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n
log4j.appender.systemOut.Threshold = ERROR
log4j.appender.systemOut.ImmediateFlush = TRUE
log4j.appender.systemOut.Target = System.out
#按DatePattern输出到文件
log4j.appender.logDailyFile = org.apache.log4j.DailyRollingFileAppender
log4j.appender.logDailyFile.layout = org.apache.log4j.PatternLayout
log4j.appender.logDailyFile.layout.ConversionPattern = %d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n
#指定日志消息的输出最低层次
log4j.appender.logDailyFile.Threshold = DEBUG
#默认值是true,所有的消息都会被立即输出
log4j.appender.logDailyFile.ImmediateFlush = TRUE
#默认值true,将消息追加到指定文件中，false指将消息覆盖指定的文件内容
log4j.appender.logDailyFile.Append = TRUE
log4j.appender.logDailyFile.File = ../logs/prg.log
log4j.appender.logDailyFile.DatePattern = '.'yyyy-MM-dd
log4j.appender.logDailyFile.Encoding = UTF-8
SpringMVC.xml文件代码：
<?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"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:task="http://www.springframework.org/schema/task"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/task
http://www.springframework.org/schema/task/spring-task.xsd">
<task:annotation-driven /> <!-- 扫描包 -->
<context:component-scan base-package="com"/> <!-- 针对返回的JSON做转码 -->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter" >
<property name="messageConverters">
<list>
<bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter" />
<bean class="org.springframework.http.converter.StringHttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/plain;charset=utf-8</value>
<value>text/html;charset=UTF-8</value>
<value>text/json;charset=UTF-8</value>
</list>
</property>
</bean>
</list>
</property>
</bean> <!-- 默认的注解映射的支持 -->
<mvc:annotation-driven /> <!-- 支持文件上传-->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="maxInMemorySize" value="2048" />
</bean> <!-- 指定spring读取db.properties数据库配置 -->
<context:property-placeholder location="classpath:db.properties" />
<bean id="datasource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" /> <!-- 初始化连接大小 -->
<property name="initialSize" value="${jdbc.initialSize}" /> <!-- 连接池最大数量 -->
<property name="maxActive" value="${jdbc.maxActive}" /> <!-- 连接池最大空闲 -->
<property name="maxIdle" value="${jdbc.maxIdle}" /> <!-- 连接池最小空闲 -->
<property name="minIdle" value="${jdbc.minIdle}" /> <!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${jdbc.maxWait}" /> <!-- 设置自动回收超时连接 -->
<property name="removeAbandoned" value="true" /> <!-- 自动回收超时时间(以秒数为单位) -->
<property name="removeAbandonedTimeout" value="${jdbc.abandTime}" /> <!-- 设置在自动回收超时连接的时候打印连接的超时错误 -->
<property name="logAbandoned" value="true" />
</bean> <!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager" p:dataSource-ref="datasource" /> <!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 -->
<aop:config proxy-target-class="true">
<aop:pointcut id="serviceMethod" expression=" execution(* com.service.*.*(..))" />
<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
</aop:config>
<tx:advice id="txAdvice">
<tx:attributes>
<tx:method name="*" />
</tx:attributes>
</tx:advice> <!-- 注入JDBC -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="datasource"/>
</bean>
</beans>
test.java测试代码如下：
package com.controller;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
class HelloWorldController {
@RequestMapping("/hello")
public String hello(Model model){
model.addAttribute("greeting","Hello Spring MVC");
return "helloworld";
}
}下面就进行Tomcat配置
点击右上角Add Configuration
如图点击左上角+号，下拉选择Tomcat Server-Local
设置这两项
然后发现下面有个Warning，点击“Fix”
在右侧点击+号，选择“Artifact”，选择“test:war”，点击ok。
Tomcat配置完成，点击运行
运行成功。
…………可累死我了。