SSM配置傻瓜式讲解

一直以来配置项目都没有太过认真的总结过, 这段时间一直在整理知识点, 趁着这个机会把SSM的配置认真的总结一次

配置pom.xml文件

  <?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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com</groupId>
    <artifactId>rui</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>rui Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
      <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
      <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
      <maven.compiler.encoding>UTF-8</maven.compiler.encoding>

      <org.springframework.version>4.0.0.RELEASE</org.springframework.version>
      <org.mybatis.version>3.4.1</org.mybatis.version>
      <org.mybatis.spring.version>1.3.0</org.mybatis.spring.version>
    </properties>

    <dependencies>
      <!--servlet-->
      <dependency>
        <groupId>org.apache.tomcat</groupId>
        <artifactId>tomcat-servlet-api</artifactId>
        <version>7.0.64</version>
      </dependency>
      <!--springmvc-->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${org.springframework.version}</version>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-oxm</artifactId>
        <version>${org.springframework.version}</version>
      </dependency>
      <!--jdbc-->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${org.springframework.version}</version>
      </dependency>
      <!--事务-->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${org.springframework.version}</version>
      </dependency>
      <!--测试-->
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${org.springframework.version}</version>
      </dependency>

      <!--aspectj切面-->
      <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjweaver</artifactId>
        <version>1.7.3</version>
      </dependency>
      <dependency>
        <groupId>org.aspectj</groupId>
        <artifactId>aspectjrt</artifactId>
        <version>1.6.11</version>
      </dependency>
      <!--mybatis-->
      <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>${org.mybatis.spring.version}</version>
      </dependency>
      <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>${org.mybatis.version}</version>
      </dependency>


      <!--json序列化-->
      <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.12</version>
      </dependency>
      <!--连接池-->
      <dependency>
        <groupId>commons-dbcp</groupId>
        <artifactId>commons-dbcp</artifactId>
        <version>1.4</version>
        <!--<scope>runtime</scope>-->
      </dependency>

      <!--日志-->
      <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-classic</artifactId>
        <version>1.1.2</version>
        <scope>compile</scope>
      </dependency>

      <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>1.1.2</version>
        <scope>compile</scope>
      </dependency>

      <!--mysql驱动-->
      <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.6</version>
      </dependency>

      <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
        <scope>test</scope>
      </dependency>

      <dependency>
        <groupId>org.hashids</groupId>
        <artifactId>hashids</artifactId>
        <version>1.0.1</version>
      </dependency>

      <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.3</version>
      </dependency>

      <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>1.2.2</version>
      </dependency>

      <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.0.1</version>
      </dependency>

      <!-- mybatis pager -->
      <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>4.1.0</version>
      </dependency>

      <dependency>
        <groupId>com.github.miemiedev</groupId>
        <artifactId>mybatis-paginator</artifactId>
        <version>1.2.17</version>
      </dependency>

      <dependency>
        <groupId>com.github.jsqlparser</groupId>
        <artifactId>jsqlparser</artifactId>
        <version>0.9.4</version>
      </dependency>

      <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>2.0.1</version>
      </dependency>

      <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.9.0</version>
      </dependency>
      <dependency>
        <groupId>redis.clients</groupId>
        <artifactId>jedis</artifactId>
        <version>2.9.0</version>
      </dependencies>
      <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>20.0</version>
      </dependency>


      <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>3.5</version>
      </dependency>


      <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2.1</version>
      </dependency>
    </dependencies>
    <!--自动生成dao pojo mapper的mybatis插件-->
    <build>
      <finalName>rui</finalName>
      <plugins>
        <plugin>
          <groupId>org.mybatis.generator</groupId>
          <artifactId>mybatis-generator-maven-plugin</artifactId>
          <version>1.3.2</version>
          <configuration>
            <verbose>true</verbose>
            <overwrite>true</overwrite>
          </configuration>
        </plugin>

        <!-- maven的核心插件之-complier插件默认只支持编译Java 1.4，因此需要加上支持高版本jre的配置，在pom.xml里面加上 增加编译插件 -->
        <plugin>
          <groupId>org.apache.maven.plugins</groupId>
          <artifactId>maven-compiler-plugin</artifactId>
          <configuration>
            <source>1.8</source>
            <target>1.8</target>
            <encoding>UTF-8</encoding>
            <compilerArguments>
              <extdirs>${project.basedir}/src/main/webapp/lib</extdirs>
            </compilerArguments>
          </configuration>
        </plugin>
      </plugins>
    </build>
  </project>

Mybatis配置文件

在resources下创建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>
    <!--配置全局属性-->
    <settings>
        <!--使用jdbc的getGeneratedKeys获取数据库自增长主见-->
        <setting name="useGeneratedKeys" value="true"/>
        <!--使用列标签替换列别名 默认为true, 列标签是数据库字段的标签, 列别名是传入的参数-->
        <setting name="useColumnLabel" value="true" />
        <!--开启驼峰命名转换 Table{create_time}=>Entity{creatTime}-->
        <setting name="mapUnderscoreToCamelCase" value="true" />
    </settings>
</configuration>

配置Spring

• 在resources下创建datasource.properties文件, 用户设置数据库参数

# driverLocation是用于mybatis自动生成pojo, dao和mapper文件的
db.driverLocation=j:/mysql-connector/mysql-connector-java-5.0.8-bin.jar
db.driverClassName=com.mysql.jdbc.Driver
db.url=jdbc:mysql://localhost:3306/bos?characterEncoding=utf-8
db.username=root
db.password=root

db.initialSize = 20
db.maxActive = 50
db.maxIdle = 20
db.minIdle = 10
db.maxWait = 10
db.defaultAutoCommit = true
db.minEvictableIdleTimeMillis = 3600000

• 由于Spring的配置太多, 一般将其分为2个文件

在resources下创建两个spring的配置文件, 命名为applicationContext.xml和applicationContext-datasource.xml

• applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     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
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--扫描文件注解-->
    <context:component-scan base-package="com.rui" annotation-config="true">
        <context:exclude-filter type="annotation"
                                expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    <!--配置@Aspectj切面-->
    <aop:aspectj-autoproxy/>
    <!--分离出一个applicationContext-datasource.xml-->
    <import resource="applicationContext-datasource.xml"/>
</beans>

• applicationContext-datasource.xml

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
     http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
     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
     http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--    引入数据库配置文件-->
    <bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="order" value="2"/>
        <property name="ignoreUnresolvablePlaceholders" value="true"/>
        <property name="locations">
            <list>
                <!--配置属性文件-->
                <value>classpath:datasource.properties</value>
            </list>
        </property>
        <property name="fileEncoding" value="utf-8"/>
    </bean>
    <!--    或者-->
    <!--<context:property-placeholder location="classpath:datasource.properties"/>-->

    <!--配置连接池-->
    <!--或者org.apache.commons.dbcp.BasicDataSource 但是需要在maven引入对应的jar包-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${db.driverClassName}"/>
        <property name="url" value="${db.url}"/>
        <property name="username" value="${db.username}"/>
        <property name="password" value="${db.password}"/>
        <!-- 连接池启动时的初始值 -->
        <property name="initialSize" value="${db.initialSize}"/>
        <!-- 连接池的最大值 -->
        <property name="maxActive" value="${db.maxActive}"/>
        <!-- 最大空闲值.当经过一个高峰时间后，连接池可以慢慢将已经用不到的连接慢慢释放一部分，一直减少到maxIdle为止 -->
        <property name="maxIdle" value="${db.maxIdle}"/>
        <!-- 最小空闲值.当空闲的连接数少于阀值时，连接池就会预申请去一些连接，以免洪峰来时来不及申请 -->
        <property name="minIdle" value="${db.minIdle}"/>
        <!-- 最大建立连接等待时间。如果超过此时间将接到异常。设为－1表示无限制 -->
        <property name="maxWait" value="${db.maxWait}"/>
        <!--#给出一条简单的sql语句进行验证 -->
        <!--<property name="validationQuery" value="select getdate()" />-->
        <property name="defaultAutoCommit" value="${db.defaultAutoCommit}"/>
        <!-- 回收被遗弃的（一般是忘了释放的）数据库连接到连接池中 -->
        <!--<property name="removeAbandoned" value="true" />-->
        <!-- 数据库连接过多长时间不用将被视为被遗弃而收回连接池中 -->
        <!--<property name="removeAbandonedTimeout" value="120" />-->
        <!-- #连接的超时时间，默认为半小时。 -->
        <property name="minEvictableIdleTimeMillis" value="${db.minEvictableIdleTimeMillis}"/>

        <!--# 失效检查线程运行时间间隔，要小于MySQL默认-->
        <property name="timeBetweenEvictionRunsMillis" value="40000"/>
        <!--# 检查连接是否有效-->
        <property name="testWhileIdle" value="true"/>
        <!--# 检查连接有效性的SQL语句-->
        <property name="validationQuery" value="SELECT 1 FROM dual"/>
    </bean>
    <!-- 配置SqlSessionFactory对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
<!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
        <property name="configLocation" value="classpath:mybatis-config.xml" />
        <!-- 扫描entity包 使用别名 -->
        <property name="typeAliasesPackage" value="com.rui.entity" />
        <!-- 扫描sql配置文件:mapper需要的xml文件 -->
        <property name="mapperLocations"
                  value="classpath*:mappers/*Mapper.xml" />
        <!-- 分页插件 -->
        <property name="plugins">
            <array>
                <bean class="com.github.pagehelper.PageHelper">
                    <property name="properties">
                        <value>
                            dialect=mysql
                        </value>
                    </property>
                </bean>
            </array>
        </property>

    </bean>
    <!-- 配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean name="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.rui.dao"/>
    </bean>

    <!-- 使用@Transactional进行声明式事务管理需要声明下面这行 -->
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
    <!-- 事务管理 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
        <property name="rollbackOnCommitFailure" value="true"/>
    </bean>
</beans>

SpringMVC的配置

• 使用默认配置:
  • 如果使用默认配置, 那么需要在WEB-INF下创建一个dispatcher-servlet.xml的文件
• 使用自定义配置
  • 需要在web.xml里指定配置文件的位置

<?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" xmlns:aop="http://www.springframework.org/schema/aop"
       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">
    <!--  自动扫描 启动注解 -->
    <context:component-scan base-package="com.rui.controller"
                            use-default-filters="false"
                            annotation-config="true">
        <context:include-filter type="annotation"
                                expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    <mvc:annotation-driven>
        <mvc:message-converters>
            <!--编码的配置-->
            <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>
                    </list>
                </property>
            </bean>
            <!--自动反序列化用的配置类-->
            <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">
                <property name="supportedMediaTypes">
                    <list>
                        <value>application/json;charset=UTF-8</value>
                    </list>
                </property>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>
    <!-- 文件上传 用到了就配置. 没用到就不用配置 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760"/> <!-- 10m -->
        <property name="maxInMemorySize" value="4096" />
        <property name="defaultEncoding" value="UTF-8" />
    </bean>
</beans>

web.xml引入Spring和SpringMVC的配置文件

<?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_2_5.xsd"
         id="WebApp_ID" version="2.5">

    <display-name>Archetype Created Web Application</display-name>
    <!-- 设置过滤器防止中文乱码   -->
    <filter>
        <filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 监听web容器的启动和关闭-->
    <listener>
        <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
    </listener>
    <!--将web容器和spring容器进行整合的监听器, 用于加载applicationContext.xml-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
            classpath:applicationContext.xml
        </param-value>
    </context-param>
    <!-- 整合SpringMVC的设置, 所有的请求都会被拦截  -->
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!--配置SpringMVC的配置文件, 如果不写, 那么必须在WEB-INF下, 创建一个dispatcher-servlet.xml
        名字不能变, 默认名为dispatcher-servlet.xml-->
<!--        <init-param>-->
<!--            <param-name>contextConfigLocation</param-name>-->
<!--            <param-value>WEB-INF/dispatcher-servlet.xml</param-value>-->
<!--        </init-param>-->
        <!--load-on-startup>0的时候, 项目初始化的时候就会加载DispatcherServlet-->
        <!--load-on-startup<=0或者不指定的时候, 只有使用的时候才会加载DispatcherServlet-->
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
</web-app>

到这里SSM项目的配置基本完成, 如果想用Mybatis自动生成pojo, dao和mapper文件可以查看Mybatis这篇文章

配置logback.xml

• 在resource下创建一个logback.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<configuration scan="true" scanPeriod="60" debug="false">
    <!--定义常量trace<debug<info<warn<error-->
    <!--日志等级-->
    <property name="log.level" value="debug" />
    <!--日志保存时长-->
    <property name="log.maxHistory" value="30" />
    <!--日志保存文件-->
    <property name="log.filePath" value="${catalina.base}/logs/webapps" />
    <!--日志输出格式-->
    <property name="log.pattern"
              value="%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread]%-5level%logger{50}-%msg%n" />
    <!--console控制台日志的配置-->
    <appender name="consoleAppender"
              class="ch.qos.logback.core.ConsoleAppender">
        <encoding>UTF-8</encoding>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
    </appender>
    <!--DEBUG-->
    <appender name="debugAppender"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${log.filePath}/debug.log</file>
        <rollingPolicy
                class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.filePath/debug/debug
            .%d{yyyy-MM-dd}.log.gz}</fileNamePattern>
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoding>UTF-8</encoding>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>DEBUG</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <!--INFO-->
    <appender name="infoAppender"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <!--日志存放位置-->
        <file>${log.filePath}/info.log</file>
        <!--日志滚动策略, 按照年月日来-->
        <rollingPolicy
                class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <!--文件名称-->
            <fileNamePattern>${log.filePath/info/info
            .%d{yyyy-MM-dd}.log.gz}</fileNamePattern>
            <!--日志保存最长时间-->
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoding>UTF-8</encoding>
        <!--按照定义好的格式, 将日志输出到日志文件里-->
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <!--过滤非level级别的信息-->
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>INFO</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <!--ERROR-->
    <appender name="errorAppender"
              class="ch.qos.logback.core.rolling.RollingFileAppender">
        <file>${log.filePath}/error.log</file>
        <rollingPolicy
                class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
            <fileNamePattern>${log.filePath/error/error
            .%d{yyyy-MM-dd}.log.gz}</fileNamePattern>
            <maxHistory>${log.maxHistory}</maxHistory>
        </rollingPolicy>
        <encoding>UTF-8</encoding>
        <encoder>
            <pattern>${log.pattern}</pattern>
        </encoder>
        <filter class="ch.qos.logback.classic.filter.LevelFilter">
            <level>ERROR</level>
            <onMatch>ACCEPT</onMatch>
            <onMismatch>DENY</onMismatch>
        </filter>
    </appender>
    <logger name="com.rui" level="${log.level}" additity="true">
        <appender-ref ref="debugAppender" />
        <appender-ref ref="infoAppender" />
        <appender-ref ref="errorAppender" />
    </logger>
    <root level="info">
        <appender-ref ref="consoleAppender"/>
    </root>
</configuration>

在控制器中, 创建Logger对象, 输出日志, 即可在tomcat目录logs/webapp/里看到生成的日志.

    Logger logger = LoggerFactory.getLogger(.class);