springmvc + mybatis + maven 项目整合

1：创建maven项目

2： pom.xml 引入相应的maven依赖

<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.nobug.cn</groupId>
   <artifactId>nobug</artifactId>
   <packaging>war</packaging>
   <version>0.0.1-SNAPSHOT</version>
   <name>nobug Maven Webapp</name>
   <url>http://maven.apache.org</url>


<!-- 配置通用的版本号 -->
   <properties>
      <!-- spring版本号 -->
      <spring.version>4.0.2.RELEASE</spring.version>
      <!-- mybatis版本号 -->
      <mybatis.version>3.2.6</mybatis.version>
      <!-- log4j日志文件管理包版本 -->
      <slf4j.version>1.7.7</slf4j.version>
      <log4j.version>1.2.17</log4j.version>
   </properties>

   <dependencies>
      <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>3.8.1</version>
         <scope>test</scope>
      </dependency>

      <dependency>
         <groupId>javax.servlet</groupId>
         <artifactId>javax.servlet-api</artifactId>
         <version>3.1.0</version>
      </dependency>

      <!-- spring核心包 -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-beans</artifactId>
             <version>${spring.version}</version>
      </dependency>
      <!-- 上下文 -->
      <dependency>
          <groupId>org.springframework</groupId>
          <artifactId>spring-context</artifactId>
             <version>${spring.version}</version>
      </dependency>
      
      <!-- spring mvc  -->
      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-webmvc</artifactId>
         <version>${spring.version}</version>
      </dependency>
      <!-- spring web -->
      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-web</artifactId>
         <version>${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-oxm</artifactId>
         <version>${spring.version}</version>
      </dependency>
      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-tx</artifactId>
         <version>${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>

      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-context-support</artifactId>
         <version>${spring.version}</version>
      </dependency>

      <dependency>
         <groupId>org.springframework</groupId>
         <artifactId>spring-test</artifactId>
         <version>${spring.version}</version>
      </dependency>
      <!-- mybatis核心包 -->
      <dependency>
         <groupId>org.mybatis</groupId>
         <artifactId>mybatis</artifactId>
         <version>${mybatis.version}</version>
      </dependency>
      <!-- mybatis/spring包 -->
      <dependency>
         <groupId>org.mybatis</groupId>
         <artifactId>mybatis-spring</artifactId>
         <version>1.2.2</version>
      </dependency>
      <!-- 导入java ee jar 包 -->
      <dependency>
         <groupId>javax</groupId>
         <artifactId>javaee-api</artifactId>
         <version>7.0</version>
      </dependency>
      <!-- 导入Mysql数据库链接jar包 -->
      <dependency>
         <groupId>mysql</groupId>
         <artifactId>mysql-connector-java</artifactId>
         <version>5.1.30</version>
      </dependency>
      <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 -->
      <dependency>
         <groupId>commons-dbcp</groupId>
         <artifactId>commons-dbcp</artifactId>
         <version>1.2.2</version>
      </dependency>
      <!-- JSTL标签类 -->
      <dependency>
         <groupId>jstl</groupId>
         <artifactId>jstl</artifactId>
         <version>1.2</version>
      </dependency>
      <!-- 日志文件管理包 -->
      <!-- log start -->
      <dependency>
         <groupId>log4j</groupId>
         <artifactId>log4j</artifactId>
         <version>${log4j.version}</version>
      </dependency>


      <!-- 格式化对象，方便输出日志 -->
      <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>fastjson</artifactId>
         <version>1.1.41</version>
      </dependency>

       <!-- logback -->
       <dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-core</artifactId>
          <version>1.1.7</version>
      </dependency>
        
       <dependency>
          <groupId>ch.qos.logback</groupId>
          <artifactId>logback-classic</artifactId>
          <version>1.1.7</version>
       </dependency>
  
      <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>
      <!-- log end -->
      <!-- 映入JSON -->
      <dependency>
         <groupId>org.codehaus.jackson</groupId>
         <artifactId>jackson-mapper-asl</artifactId>
         <version>1.9.13</version>
      </dependency>
      <!-- 上传组件包 -->
      <dependency>
         <groupId>commons-fileupload</groupId>
         <artifactId>commons-fileupload</artifactId>
         <version>1.3.1</version>
      </dependency>
      <dependency>
         <groupId>commons-io</groupId>
         <artifactId>commons-io</artifactId>
         <version>2.4</version>
      </dependency>
      <dependency>
         <groupId>commons-codec</groupId>
         <artifactId>commons-codec</artifactId>
         <version>1.9</version>
      </dependency>
      <!-- gson依赖 -->
      <dependency>
         <groupId>com.google.code.gson</groupId>
         <artifactId>gson</artifactId>
         <version>2.3.1</version>
      </dependency>
        <!-- druid 用户做数据源的管理 -->
      <dependency>
         <groupId>com.alibaba</groupId>
         <artifactId>druid</artifactId>
         <version>1.0.13</version>
      </dependency>

      <!-- https://mvnrepository.com/artifact/org.projectlombok/lombok
        得到注解 如   get set toString方法
       -->
      <dependency>
         <groupId>org.projectlombok</groupId>
         <artifactId>lombok</artifactId>
         <version>1.16.18</version>
         <scope>provided</scope>
      </dependency>
      
       <!-- Jackson -->
       <dependency>
          <groupId>com.fasterxml.jackson.datatype</groupId>
          <artifactId>jackson-datatype-guava</artifactId>
          <version>2.5.3</version>
       </dependency>
       
       <dependency>  
          <groupId>com.fasterxml.jackson.core</groupId>  
          <artifactId>jackson-core</artifactId>  
          <version>2.5.3</version>  
      </dependency> 
      
      <dependency>  
          <groupId>com.fasterxml.jackson.core</groupId>  
          <artifactId>jackson-annotations</artifactId>  
          <version>2.5.3</version>  
      </dependency> 
      
        <dependency>
            <groupId>org.apache.tomcat</groupId>
            <artifactId>tomcat-jsp-api</artifactId>
            <version>8.0.28</version>
        </dependency>
        <!-- validator 校验工具 -->
         <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.1.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.2.4.Final</version>
        </dependency>
        
        <!-- tools 工具包 -->
         <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.2</version>
        </dependency>
         <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.10</version>
        </dependency>
        
        <!-- jackson  工具类-->
        <dependency>
           <groupId>org.codehaus.jackson</groupId>
           <artifactId>jackson-core-asl</artifactId>
           <version>1.9.13</version>
        </dependency>
        
          <dependency>
           <groupId>org.codehaus.jackson</groupId>
           <artifactId>jackson-mapper-asl</artifactId>
           <version>1.9.13</version>
        </dependency>
        
        <!-- StrigUtils 工具类 -->
         <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-lang3</artifactId>
           <version>3.5</version>
        </dependency>
        
        <!-- 邮箱发送 -->
        <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-email</artifactId>
           <version>1.4</version>
        </dependency>

      <!--redis -->
      <dependency>
         <groupId>redis.clients</groupId>
         <artifactId>jedis</artifactId>
         <version>2.8.1</version>
         <type>jar</type>
      </dependency>
   </dependencies>
   <build>
      <finalName>nobug</finalName>
      <plugins>
         <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.3</version>
            <configuration>
               <!-- 指定source和target的版本 -->
               <source>1.7</source>
               <target>1.7</target>
            </configuration>
         </plugin>
      </plugins>
   </build>
</project>

3：applicationContetext.xml文件编写

<?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:p="http://www.springframework.org/schema/p"  
    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-3.1.xsd    
                        http://www.springframework.org/schema/context    
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd    
                        http://www.springframework.org/schema/mvc    
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  
    <!-- 自动扫描 -->  
    <context:component-scan base-package="com.nobug.cn" />  
   <!-- 可以用list 配置多个数据源
      <list>
         <value>classpath:jdbc.properties</value>
      </list>
     -->
    <!-- 引入配置文件 -->  
    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:jdbc.properties</value>
                <value>classpath:redis.properties</value>
            </list>
        </property>
    </bean>  



    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" 
        destroy-method="close">  
        <property name="driverClassName" value="${driver}" />  
        <property name="url" value="${url}" />  
        <property name="username" value="${username}" />  
        <property name="password" value="${password}" />  
        <!-- 初始化连接大小 -->  
        <property name="initialSize" value="${initialSize}"></property>  
        <!-- 连接池最大数量 -->  
        <property name="maxActive" value="${maxActive}"></property>  
        <!-- 连接池最大空闲 -->  
        <property name="maxIdle" value="${maxIdle}"></property>  
        <!-- 连接池最小空闲 -->  
        <property name="minIdle" value="${minIdle}"></property>  
        <!-- 获取连接最大等待时间 -->  
        <property name="maxWait" value="${maxWait}"></property>  
        <property name="filters" value="stat,wall" ></property>
    </bean>  
  
    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件  classpath是resources文件下下面的-->  
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
        <property name="dataSource" ref="dataSource" />  
        <!-- 自动扫描mapping.xml文件 -->  
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <property name="mapperLocations" value="classpath*:sqlMap/*.xml"></property>
    </bean>  
  
    <!-- DAO接口所在包名，Spring会自动查找其下的类 -->  
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
        <property name="basePackage" value="com.nobug.cn.dao" />  
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>  
    </bean>  
  
    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->  
    <bean id="transactionManager"  
        class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
        <property name="dataSource" ref="dataSource" />  
    </bean>  
    <!-- <tx:annotation-driven trasaction-manager="transactionManager"/> -->
    <!-- druid -->
    <bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
         <!-- 如果超过3000毫秒说明是慢sql -->
         <property name="slowSqlMillis" value="3000"></property>
         <!-- 发现慢sql并打印 -->
         <property name="logSlowSql" value="true"></property>
         <!-- sql默认成一行 -->
         <property name="mergeSql" value="true"></property>
    </bean>
    <bean id="wall-filter" class="com.alibaba.druid.wall.WallFilter">
    <!-- 监控的数据库是mysql -->
         <property name="dbType" value="mysql"></property>
    </bean>

    <!--引入 redis.xml -->
    <import resource="redis.xml"></import>
</beans> 

4:spring-servlet.xml文件编写:

<?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:p="http://www.springframework.org/schema/p"  
    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-3.1.xsd    
                        http://www.springframework.org/schema/context    
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd    
                        http://www.springframework.org/schema/mvc    
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  
       <!-- 开启注解模式，不然请求不到控制器 -->
   <mvc:annotation-driven />
   <!-- 配置前后台的监听 -->
   <mvc:interceptors>
     <bean class="com.nobug.cn.commons.HttpInterceptor"></bean>
   </mvc:interceptors>
    <!-- 自动扫描该包，使SpringMVC认为包下用了@controller注解的类是控制器 -->  
    <context:component-scan base-package="com.nobug.cn.controller" />  
    <!--避免IE执行AJAX时，返回JSON出现下载文件 -->  
    <bean id="mappingJacksonHttpMessageConverter"  
        class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">  
        <property name="supportedMediaTypes">  
            <list>  
                <value>text/html;charset=UTF-8</value>
                <value>application/json;charset=UTF-8</value>
            </list>  
        </property>  
    </bean>  
    <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->  
    <bean  
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
        <property name="messageConverters">  
            <list>  
                <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON转换器 -->  
            </list>  
        </property>  
    </bean>
    <!-- 管理全局的异常 --> 
    <bean class="com.nobug.cn.exception.SpringEceptionResolver"></bean>
   
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>
    <!--  -->
    <bean class="org.springframework.web.servlet.view.BeanNameViewResolver"></bean>
                               
    <bean id="jsonView" class="org.springframework.web.servlet.view.json.MappingJackson2JsonView"></bean>
    <!-- 定义跳转的文件的前后缀 ，视图模式配置-->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
      <!--   这里的配置我的理解是自动给后面action的方法return的字符串加上前缀和后缀，变成一个 可用的url地址   -->
        <property name="prefix" value="/WEB-INF/views/" /> 
        <property name="suffix" value=".jsp" /> 
         
    </bean>
    <!-- spring上下文  lazy-init="false"开始巨加载 -->
    <bean class="com.nobug.cn.commons.ApplicatonContextHelper" lazy-init="false"></bean>
    <!-- 配置多个视图解析器 -->
   <!--  <bean id="viewResolver" class="org.springframework.web.servlet.view.velocity.VelocityViewResolver">  
          <property name="cache" value="false"/>  
          <property name="prefix" value="/WEB-INF/houtai/"/>  
          <property name="suffix" value=".jsp"/>  
          <property name="contentType"><value>text/html;charset=UTF-8</value></property>  
          <property name="exposeSpringMacroHelpers" value="true"/>  
          <property name="order"><value>1</value></property>  
    </bean>  
     <bean id="JSPviewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
          <property name="cache" value="false"/>  
          <property name="prefix" value="/WEB-INF/jsp/"/>  
          <property name="suffix" value=".jsp"/>  
          <property name="contentType"><value>text/html;charset=UTF-8</value></property>  
          <property name="order"><value>0</value></property>  
    </bean>  -->
      
    <!-- 配置文件上传，如果没有使用文件上传可以不用配置，当然如果不配，那么配置文件中也不必引入上传组件包 -->  
    <bean id="multipartResolver"    
        class="org.springframework.web.multipart.commons.CommonsMultipartResolver">    
        <!-- 默认编码 -->  
        <property name="defaultEncoding" value="utf-8" />    
        <!-- 文件大小最大值 -->  
        <property name="maxUploadSize" value="10485760000" />    
        <!-- 内存中的最大值 -->  
        <property name="maxInMemorySize" value="40960" />    
    </bean> 
    <!-- 设置js css的 访问 -->
    <mvc:resources location="/js/" mapping="/js/**"/>
    <mvc:resources location="/css/" mapping="/css/**"/>
    <mvc:resources location="/bootstrap/" mapping="/bootstrap/**"/>
    <mvc:resources location="/assets/" mapping="/assets/**"/>
    <mvc:resources location="/ztree/" mapping="/ztree/**"/>
   <!-- <mvc:resources location="/WEB-INF/jsp/js/" mapping="/js/**"/> -->
    <mvc:resources mapping="/WEB-INF/index.jsp" location="/" />

</beans>  

5：jdbc.properties文件

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/nobug?useUnicode=true&characterEncoding=UTF-8
username=root
password=admin
#\u5B9A\u4E49\u521D\u59CB\u8FDE\u63A5\u6570
initialSize=0
#\u5B9A\u4E49\u6700\u5927\u8FDE\u63A5\u6570
maxActive=20
#\u5B9A\u4E49\u6700\u5927\u7A7A\u95F2
maxIdle=20
#\u5B9A\u4E49\u6700\u5C0F\u7A7A\u95F2
minIdle=1
#\u5B9A\u4E49\u6700\u957F\u7B49\u5F85\u65F6\u95F4
maxWait=60000

6：mybatis-config.xml文件

<?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>
       
<!--      <settings>
        <setting name="safeRowBoundsEnabled" value="true"/>
        <setting name="cacheEnabled" value="false"/>
        sql自动生成主键
        <setting name="useGeneratedKeys" value="true"/>
     </settings> -->
    <typeAliases>
       <!-- 部门 -->
       <typeAlias alias="SysDept" type="com.nobug.cn.dto.SysDeptDto"/>
       <!-- 用户 -->
       <typeAlias alias="SysUser" type="com.nobug.cn.dto.SysUserDto"/>
       <!-- 菜单 -->
       <typeAlias alias="SysMenu" type="com.nobug.cn.dto.SysMenuDto"/>
       <!-- 菜单模块 -->
       <typeAlias alias="SysMenuModule" type="com.nobug.cn.dto.SysMenuModuleDto"/>
       <!-- 角色模块  -->
       <typeAlias alias="SysRole" type="com.nobug.cn.dto.SysRoleDto"/>
       <!-- 日志模块  -->
       <typeAlias alias="SysLog" type="com.nobug.cn.dto.SysLogDto"/>
       <!-- 角色菜单模块  -->
       <typeAlias alias="SysRoleMenu" type="com.nobug.cn.dto.SysRoleMenuDto"/>
       <!-- 角色用户模块  -->
       <typeAlias alias="SysRoleUser" type="com.nobug.cn.dto.SysRoleUserDto"/>
    </typeAliases>
    
   <!--  <typeHandlers>
      <typeHandler handler=""/>
    </typeHandlers> -->
    
</configuration>

7 : web.xml

<?xml version="1.0" encoding="UTF-8"?>  
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
    xmlns="http://java.sun.com/xml/ns/javaee"  
    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>
  <!-- 编码过滤器 -->  
    <filter> 
    <!-- spring的监听器，监听上下文 -->
        <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>
        <init-param>  
            <param-name>forceEncoding</param-name>  
            <param-value>true</param-value>  
        </init-param>
    </filter> 
    
     <!-- Spring和mybatis的配置文件  配置beans目录-->  
    <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <!-- 配置spring beans的加载文件 -->
        <param-value>classpath:applicationContext.xml</param-value>  
    </context-param>  
 
    <filter-mapping>  
        <filter-name>encodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>  
    <!-- Spring监听器 -->  
    <listener>  
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  
    </listener>
    <!-- 防止Spring内存溢出监听器 -->  
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>  
    </listener>
  
    <!-- Spring MVC servlet  前端控制器-->  
    <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:spring-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>  
    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <!-- 此处可以可以配置成*.do，对应struts的后缀习惯 -->  
        <url-pattern>*.htm</url-pattern>
        <url-pattern>*.json</url-pattern>
    </servlet-mapping>
    <welcome-file-list>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>
     
     <!-- druid -->
    <servlet>
       <servlet-name>DruidStatServlet</servlet-name>
       <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>   
       <init-param>
         <param-name>LoginUsername</param-name>
         <param-value>druid</param-value>
       </init-param> 
        <init-param>
         <param-name>LoginPassword</param-name>
         <param-value>druid</param-value>
       </init-param>
    </servlet>
     <servlet-mapping>
       <servlet-name>DruidStatServlet</servlet-name>
       <!-- druid  请求路径 -->
       <url-pattern>/sys/druid/*</url-pattern>
     </servlet-mapping>
     <!-- druid监听器  拦截哪些请求-->
     <filter>
       <filter-name>DruidWebStatFilter</filter-name>
       <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
       <!-- 初始化参数 -->
       <init-param>
        <param-name>exclusions</param-name>
        <!-- 过滤的请求 -->
        <param-value>*.js,*.css,*.jpg,*.ico,*.gif,/sys/druid/*</param-value>
       </init-param>
     </filter>
    <filter-mapping>
        <filter-name>DruidWebStatFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- 登录拦截器 -->
     <filter>
       <filter-name>LoginFilter</filter-name>
       <filter-class>com.nobug.cn.filter.LoginFilter</filter-class>
     </filter>
     <filter-mapping>
        <filter-name>LoginFilter</filter-name>
        <!-- 需要拦截的请求 -->
        <url-pattern>/sys*/*</url-pattern>
        <url-pattern>/admin/*</url-pattern>
     </filter-mapping>
</web-app>

项目结构图如下: