开发工具是ECLIPSE，由于是MAVEN WEB项目，不是ECLIPSE项目，测试用的如TOMCAT就不能使用平常的ECLIPSE加TOMCAT的方式了。只能用MAVEN的TOMCAT插件。
MAVEN的这个TOMCAT插件其实就是让MAVEN去启动一个内嵌的TOMCAT服务器，如果项目和这个TOMCAT关联了，项目就可以部署上去。
内嵌的服务器功能扩展，是通过插件的配置进行的。如改端口等，一些复杂的功能如增加数据源，就要配置自定义的server.xml了，但配置了这个后，插件的所有功能都被覆盖了，如context.xml也无效了，代码改变，自动重启TOMCAT等功能也没有了。
数据源只能配在context.xml中，作用范围只在该WEB APP内。
费话不多说，上菜：
pom.xml
<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.freelancerj2ee</groupId>
<artifactId>radar-web</artifactId>
<packaging>war</packaging>
<version>1.0</version>
<name>radar-web Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<hibernate.version>4.0.1.Final</hibernate.version>
<mysql.connector.version>5.1.18</mysql.connector.version>
<slf4j.version>1.6.1</slf4j.version>
<spring.version>3.1.0.RELEASE</spring.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<!-- Spring 3 dependencies -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</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>${spring.version}</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>2.2.2</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Spring Data JPA -->
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.0.2.RELEASE</version>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>${hibernate.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.connector.version}</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>7.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-catalina</artifactId>
<version>7.0.42</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.tomcat</groupId>
<artifactId>tomcat-coyote</artifactId>
<version>7.0.42</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>radar-web</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.1</version>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<mode>context</mode>
<contextFile>src/main/webapp/META-INF/context.xml</contextFile>
<!-- 如果server.xml配了，则其他所有配置都会失效，包括context.xml -->
<!-- <serverXml>src/main/tomcatconf/server.xml</serverXml> -->
<contextReloadable>true</contextReloadable>
<backgroundProcessorDelay>5</backgroundProcessorDelay>
</configuration>
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.connector.version}</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.glassfish.maven.plugin</groupId>
<artifactId>maven-glassfish-plugin</artifactId>
<version>2.1</version>
<configuration>
<glassfishDirectory>D:/PAUL/DOWNLOAD/SOFTWARE/DEVELOP/GLASSFISH4/glassfish</glassfishDirectory>
<user>admin</user>
<passwordFile>pwd</passwordFile>
<autoCreate>true</autoCreate>
<debug>true</debug>
<echo>true</echo>
<terse>true</terse>
<domain>
<name>domain1</name>
<adminPort>4848</adminPort>
<httpPort>8080</httpPort>
<httpsPort>8443</httpsPort>
<iiopPort>3700</iiopPort>
<jmsPort>7676</jmsPort>
<reuse>false</reuse>
</domain>
<components>
<component>
<name>${project.artifactId}</name>
<artifact>
${project.build.directory}/${project.artifactId}.${project.packaging}
</artifact>
</component>
</components>
</configuration>
</plugin>
</plugins>
</build>
</project>
context.xml，src\main\webapp\META-INF\context.xml。这样的配置，各个竞价如JSP、WEB-INF/classes、lib可以在不同的地方，类路径会取MAVEN的类输出路径，lib会取MAVEN引用的lib。
<Context path="/radar-web"
docBase="E:/radar-web/src/main/webapp"
debug="0" privileged="true" reloadbale="true">
<Resource name="jdbc/myds"
auth="Container"
type="javax.sql.DataSource"
factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
testWhileIdle="true"
testOnBorrow="true"
testOnReturn="false"
validationQuery="SELECT 1"
validationInterval="30000"
timeBetweenEvictionRunsMillis="30000"
maxActive="100"
minIdle="10"
maxWait="10000"
initialSize="10"
removeAbandonedTimeout="60"
removeAbandoned="true"
logAbandoned="true"
minEvictableIdleTimeMillis="30000"
jmxEnabled="true"
jdbcInterceptors="org.apache.tomcat.jdbc.pool.interceptor.ConnectionState;
org.apache.tomcat.jdbc.pool.interceptor.StatementFinalizer"
username="root"
password="12345"
driverClassName="com.mysql.jdbc.Driver"
url="jdbc:mysql://localhost:3306/html5canvas"
/>
<Realm className="org.apache.catalina.realm.DataSourceRealm"
userTable="userinfo"
userNameCol="user_name"
userCredCol="password"
userRoleTable="userinfo_roles"
roleNameCol="role_name"
localDataSource="true"
dataSourceName="jdbc/myds"/>
</Context>
src\main\resources\META-INF\persistence.xml
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="SimplePU" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>com.freelancerj2ee.radar.userinfo.valueobject.UserInfo</class>
<class>com.freelancerj2ee.radar.userinfo.valueobject.AccountInfo</class>
<class>com.freelancerj2ee.radar.role.valueobject.Role</class>
<non-jta-data-source>java:comp/env/jdbc/myds</non-jta-data-source>
<properties>
<property name="hibernate.show_sql" value="true"/>
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.use_sql_comments" value="false"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
</properties>
</persistence-unit>
</persistence>
web.xml加上这一段：
<resource-ref>
<description>DB Connection</description>
<res-ref-name>java:comp/env/jdbc/myds</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
这样使用命令
mvn tomcat7:run
即可运行了。