4
回答
使用spring+mybatis第一次请求特别慢主要是因为什么(配置文件如题)
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springMVC-servlet.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: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">

    <context:component-scan base-package="com.king.controller" annotation-config="true"/>


    <mvc:annotation-driven>
        <mvc:message-converters>
            <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>
            <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>

    <!--&lt;!&ndash; 视图解析器 &ndash;&gt;-->
    <!--<bean-->
            <!--class="org.springframework.web.servlet.view.InternalResourceViewResolver">-->
        <!--<property name="prefix" value="/WEB-INF/jsp/" />-->
        <!--<property name="suffix" value=".jsp" />-->
    <!--</bean>-->

    <!--&lt;!&ndash; 静态资源映射 &ndash;&gt;-->
    <!--<mvc:resources location="/js/" mapping="/js/**"/>-->
    <!--<mvc:resources location="/css/" mapping="/css/**"/>-->



    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="10485760000"/>
        <property name="maxInMemorySize" value="4096" />
        <property name="defaultEncoding" value="UTF-8"></property>
    </bean>


</beans>

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">

  <context:component-scan base-package="com.king" annotation-config="true"/>


  <aop:aspectj-autoproxy/>


  <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="order" value="2"/>
    <property name="ignoreUnresolvablePlaceholders" value="true"/>
    <property name="locations">
      <list>
        <value>classpath:db.properties</value>
      </list>
    </property>
    <property name="fileEncoding" value="utf-8"/>
  </bean>


  <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}"/>
    <property name="initialSize" value="${db.initialSize}"/>
    <property name="maxActive" value="${db.maxActive}"/>
    <property name="maxIdle" value="${db.maxIdle}"/>
    <property name="minIdle" value="${db.minIdle}"/>
    <property name="maxWait" value="${db.maxWait}"/>
    <property name="defaultAutoCommit" value="${db.defaultAutoCommit}"/>
    <property name="minEvictableIdleTimeMillis" value="${db.minEvictableIdleTimeMillis}"/>
    <property name="timeBetweenEvictionRunsMillis" value="40000"/>
    <property name="testWhileIdle" value="true"/>
    <property name="validationQuery" value="SELECT 1 FROM dual"/>
  </bean>

  <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="mapperLocations" value="classpath*:mappers/*Mapper.xml"></property>

    <!-- 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>

  <bean name="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.king.dao"/>
  </bean>

  <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />

  <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
    <property name="rollbackOnCommitFailure" value="true"/>
  </bean>


</beans>

db.propeties(部分)

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

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>bin</groupId>
  <artifactId>King</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>King 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>

    <!-- 富文本编辑器 -->
    <dependency>
      <groupId>com.baidu</groupId>
      <artifactId>ueditor</artifactId>
      <version>1.1.2</version>
    </dependency>

    <dependency>
      <groupId>cn.songxinqiang</groupId>
      <artifactId>com.baidu.ueditor</artifactId>
      <version>1.1.2-offical</version>
    </dependency>

    <dependency>
      <groupId>org.apache.tomcat</groupId>
      <artifactId>tomcat-servlet-api</artifactId>
      <version>7.0.64</version>
    </dependency>

    <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>

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

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

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


    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.7.3</version>
    </dependency>

    <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>

    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.6.11</version>
    </dependency>

    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.12</version>
    </dependency>

    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.4</version>
      <!--<scope>runtime</scope>-->
    </dependency>


    <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>

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

    <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>


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

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


    <!-- id加密解密 -->
    <dependency>
      <groupId>org.hashids</groupId>
      <artifactId>hashids</artifactId>
      <version>1.0.1</version>
    </dependency>


    <!-- ftpclient -->
    <dependency>
      <groupId>commons-net</groupId>
      <artifactId>commons-net</artifactId>
      <version>3.1</version>
    </dependency>

    <!-- file upload -->

    <!-- https://mvnrepository.com/artifact/commons-fileupload/commons-fileupload -->
    <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>


    <!-- alipay -->
    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.10</version>
    </dependency>
    <dependency>
      <groupId>commons-configuration</groupId>
      <artifactId>commons-configuration</artifactId>
      <version>1.10</version>
    </dependency>
    <dependency>
      <groupId>commons-lang</groupId>
      <artifactId>commons-lang</artifactId>
      <version>2.6</version>
    </dependency>
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.1.1</version>
    </dependency>
    <dependency>
      <groupId>com.google.zxing</groupId>
      <artifactId>core</artifactId>
      <version>2.1</version>
    </dependency>

    <dependency>
      <groupId>org.hamcrest</groupId>
      <artifactId>hamcrest-core</artifactId>
      <version>1.3</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>
    </dependency>

    <dependency>
      <groupId>javax.mail</groupId>
      <artifactId>mail</artifactId>
      <version>1.5.0-b01</version>
    </dependency>

    <!-- 七牛云存储 -->
    <dependency>
      <groupId>com.qiniu</groupId>
      <artifactId>qiniu-java-sdk</artifactId>
      <version>[7.2.0, 7.2.99]</version>
    </dependency>

    <dependency>
      <groupId>com.squareup.okhttp3</groupId>
      <artifactId>okhttp</artifactId>
      <version>3.3.1</version>
      <scope>compile</scope>
    </dependency>

    <dependency>
      <groupId>com.google.code.gson</groupId>
      <artifactId>gson</artifactId>
      <version>2.6.2</version>
      <scope>compile</scope>
    </dependency>

    <dependency>
      <groupId>com.qiniu</groupId>
      <artifactId>happy-dns-java</artifactId>
      <version>0.1.4</version>
      <scope>compile</scope>
    </dependency>

  </dependencies>
  <build>
    <finalName>King</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>

      <!-- geelynote 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>1.7</source>
          <target>1.7</target>
          <encoding>UTF-8</encoding>
          <compilerArguments>
            <extdirs>${project.basedir}/src/main/webapp/WEB-INF/lib</extdirs>
          </compilerArguments>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

 

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