多數據源切換（攔截器）

參考博客：http://blog.csdn.net/wp1603710463/article/details/50839036

http://sunney2010.iteye.com/blog/1404729

 

pom

  <properties>
    <spring.version>4.3.5.RELEASE</spring.version>
    <mybatis.version>3.4.1</mybatis.version>
    <mybatis-spring.version>1.3.1</mybatis-spring.version>
    <oracle.version>11.1.0.7.0</oracle.version>
    <mysql.version>5.1.10</mysql.version>
    <!-- druid 版本號 -->
    <druid.version>1.0.29</druid.version>
    <dbcp.version>1.2.2</dbcp.version>
    <c3p0.version>0.9.1.2</c3p0.version>
    <!--日誌 s-->
    <logback.version>1.2.3</logback.version>
    <slf4j.version>1.7.7</slf4j.version>
    <!--日誌 s-->
  </properties>
  <dependencies>
    <!--整合spring框架s-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</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-test</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!--spring織入-->
    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.7.2</version>
    </dependency>

    <!--整合spring框架s-->
    <!-- 整合mybatis和mybatis和spring整合包 s-->

    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>${mybatis-spring.version}</version>
    </dependency>
    <!-- 整合mybatis和mybatis和spring整合包 s-->

    <!-- 整合數據庫鏈接池 s-->

    <!--druid 鏈接池-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>${druid.version}</version>
    </dependency>
    <!-- dbcp -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>${dbcp.version}</version>
    </dependency>

    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>${c3p0.version}</version>
    </dependency>
    <!-- 整合數據庫鏈接池 e-->


    <!-- 數據庫驅動 -->
    <dependency>-->
      <groupId>com.oracle</groupId>
      <artifactId>ojdbc6</artifactId>
      <version>${oracle.version}</version>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql.version}</version>
    </dependency>

    <!-- 第三方經常使用jar包 -->
    <!--日誌 logback + slf4j start-->
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
      <scope>compile</scope>
    </dependency>

    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
      <version>${logback.version}</version>
    </dependency>

    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>${logback.version}</version>
    </dependency>
    <!-- logback + slf4j end -->
    <!--解決數據量大的問題-->

    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi</artifactId>
      <version>3.9</version>
    </dependency>
    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi-ooxml</artifactId>
      <version>3.9</version>
    </dependency>
    <!--解決數據量大的問題-->
    <!--報表-->
    <dependency>
      <groupId>jfree</groupId>
      <artifactId>jfreechart</artifactId>
      <version>1.0.13</version>
    </dependency>

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

    <!--文件上傳-->
    <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>

    <dependency>
      <groupId>javax.servlet.jsp.jstl</groupId>
      <artifactId>jstl-api</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>org.glassfish.web</groupId>
      <artifactId>jstl-impl</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>jexcelapi</groupId>
      <artifactId>jxl</artifactId>
      <version>2.4.2</version>
    </dependency>

    <!-- 防止和tomcat中的jar衝突 -->
    <!--<dependency>-->
      <!--<groupId>org.apache.tomcat</groupId>-->
      <!--<artifactId>servlet-api</artifactId>-->
      <!--<version>6.0.33</version>-->
      <!--<scope>provided</scope>-->
    <!--</dependency>-->

    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>servlet-api</artifactId>
      <version>2.5</version>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.1</version>
      <scope>provided</scope>
    </dependency>

    <dependency>
      <groupId>org.apache.geronimo.specs</groupId>
      <artifactId>geronimo-servlet_3.0_spec</artifactId>
      <version>1.0</version>
      <scope>provided</scope>
    </dependency>
  </dependencies>
  <build>
    <finalName>ssm2017</finalName>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.7</source>
          <target>1.7</target>
        </configuration>
      </plugin>
    </plugins>
  </build>

　　2.druid.properties

driverClassName:com.mysql.jdbc.Driver

db-key-170=dataSource-170
db-key-236=dataSource-236
db-key-225=dataSource-225

url:jdbc:mysql://192.168.20.170:3306/s?characterEncoding=utf-8
username:root
password:qqqqq

170.url:jdbc:mysql://192.168.20.170:3306/s?characterEncoding=utf-8
170.username:root
170.password:cccccc

225.url:jdbc:mysql://192.168.20.225:3306/s2017?characterEncoding=utf-8
225.username:root
225.password:bbbbbbb

236.url:jdbc:mysql://192.168.20.236:3306/s?characterEncoding=utf-8
236.username:root
236.password:123456

filters:stat
#監控統計用的filter:stat
#日誌用的filter:log4j
#防護sql注入的filter:wal

maxActive:20
initialSize:1
maxWait:60000
minIdle:10
#maxIdle:15

timeBetweenEvictionRunsMillis:60000
minEvictableIdleTimeMillis:300000
maxPoolPreparedStatementPerConnectionSize:20
#用來檢測鏈接是否有效的sql
validationQuery:SELECT 'x'
#validationQuery:select 1 from dual
testWhileIdle:true
testOnBorrow:false
testOnReturn:false
poolPreparedStatements:true
maxOpenPreparedStatements:20
removeAbandoned:true
removeAbandonedTimeout:1800
logAbandoned:false

　　3.logback.xml

     4.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:jee="http://www.springframework.org/schema/jee"
       xmlns:lang="http://www.springframework.org/schema/lang"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="
     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
     http://www.springframework.org/schema/jee
     http://www.springframework.org/schema/jee/spring-jee.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context.xsd
     http://www.springframework.org/schema/lang
     http://www.springframework.org/schema/lang/spring-lang.xsd">


    <!-- 加載配置文件 -->
    <!--<context:property-placeholder location="classpath:jdbc.properties"/>-->
    <!--<context:property-placeholder location="classpath:druid.properties"/>-->
    <!--  jdbc數據庫鏈接池
     <bean id="parentDataSource" class="org.apache.commons.dbcp.BasicDataSource">
         <property name="driverClassName" value="${jdbc.driverClassName}"/>
         <!–<property name="url" value="${170.jdbc.url}"/>–>
         <!–<property name="username" value="${170.jdbc.username}"/>–>
         <!–<property name="password" value="${170.jdbc.password}"/>–>
         <!– 開發階段建議最大鏈接數據儘可能少，夠用便可 –>
         <property name="maxActive" value="${jdbc.maxActive}"/>
         <property name="maxIdle" value="${jdbc.maxIdle}"/>
     </bean>-->


    <!-- 1. 加載數據庫配置的屬性文件 -->

    <bean id="propertyConfigurer"
          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:/druid.properties</value>
            </list>
        </property>
    </bean>
    <!--2. 數據源dataSource-->
    <bean id="parentDataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"
          init-method="init">
        <!-- 數據庫基本信息配置 -->
        <property name="url" value="${url}"/>
        <property name="username" value="${username}"/>
        <property name="password" value="${password}"/>
        <property name="driverClassName" value="${driverClassName}"/>

        <!-- 最大併發鏈接數 -->
        <property name="maxActive" value="${maxActive}"/>
        <!-- 初始化鏈接數量 -->
        <property name="initialSize" value="${initialSize}"/>
        <!-- 配置獲取鏈接等待超時的時間 -->
        <property name="maxWait" value="${maxWait}"/>
        <!-- 最小空閒鏈接數 -->
        <property name="minIdle" value="${minIdle}"/>
        <!-- 配置間隔多久才進行一次檢測，檢測須要關閉的空閒鏈接，單位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis}"/>
        <!-- 配置一個鏈接在池中最小生存的時間，單位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis}"/>
        <property name="validationQuery" value="${validationQuery}"/>
        <property name="testWhileIdle" value="${testWhileIdle}"/>
        <property name="testOnBorrow" value="${testOnBorrow}"/>
        <property name="testOnReturn" value="${testOnReturn}"/>

        <!-- 打開PSCache，而且指定每一個鏈接上PSCache的大小 -->
        <property name="poolPreparedStatements" value="${poolPreparedStatements}"/>
        <property name="maxOpenPreparedStatements" value="${maxOpenPreparedStatements}"/>

        <!-- 打開 removeAbandoned 功能 -->
        <property name="removeAbandoned" value="${removeAbandoned}"/>
        <!-- 1800 秒，也就是 30 分鐘 -->
        <property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}"/>
        <!-- 關閉 abanded 鏈接時輸出錯誤日誌 -->
        <property name="logAbandoned" value="${logAbandoned}"/>

        <property name="filters" value="${filters}"/>
        <!-- 解密密碼必需要配置的項 -->
        <!--<property name="filters" value="config" />-->
        <!--<property name="connectionProperties" value="config.decrypt=true;config.decrypt.key=${publicKey}" />-->

        <!-- 這裏配置提交方式，默認就是TRUE，能夠不用配置 -->
        <property name="defaultAutoCommit" value="true"/>
        <!-- 驗證鏈接有效與否的SQL，不一樣的數據配置不一樣 -->
        <property name="proxyFilters">
            <list>
                <ref bean="logFilter"/>
            </list>
        </property>
    </bean>
    <bean id="logFilter" class="com.alibaba.druid.filter.logging.Slf4jLogFilter">
        <property name="statementExecutableSqlLogEnable" value="false"/>
    </bean>


    <bean id="170dataSource" parent="parentDataSource">
        <property name="url" value="${170.url}"/>
        <property name="username" value="${170.username}"/>
        <property name="password" value="${170.password}"/>
    </bean>
    <bean id="236dataSource" parent="parentDataSource">
        <property name="url" value="${236.url}"/>
        <property name="username" value="${236.username}"/>
        <property name="password" value="${236.password}"/>
    </bean>
    <bean id="225dataSource" parent="parentDataSource">
        <property name="url" value="${225.url}"/>
        <property name="username" value="${225.username}"/>
        <property name="password" value="${225.password}"/>
    </bean>

    <bean id="dataSource" class="cn.lpj.utils.DynamicDataSource">
        <property name="targetDataSources">
            <map key-type="java.lang.String">
                <entry key="${db-key-170}" value-ref="170dataSource"/>
                <entry key="${db-key-236}" value-ref="236dataSource"/>
                <entry key="${db-key-225}" value-ref="225dataSource"/>
            </map>
        </property>
    </bean>

    <!--<bean id="parentDataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"-->
    <!--destroy-method="close">-->
    <!--<property name="url" value="${225.url}"/>-->
    <!--<property name="username" value="${225.username}"/>-->
    <!--<property name="password" value="${225.password}"/>-->
    <!--<property name="driverClassName" value="${driverClassName}"/>-->
    <!--<property name="filters" value="${filters}"/>-->

    <!--<property name="maxActive" value="${maxActive}"/>-->
    <!--<property name="initialSize" value="${initialSize}"/>-->
    <!--<property name="maxWait" value="${maxWait}"/>-->
    <!--<property name="minIdle" value="${minIdle}"/>-->

    <!--<property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis}"/>-->
    <!--<property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis}"/>-->

    <!--<property name="validationQuery" value="${validationQuery}"/>-->

    <!--<property name="maxOpenPreparedStatements" value="${maxOpenPreparedStatements}"/>-->
    <!--<property name="maxPoolPreparedStatementPerConnectionSize"-->
    <!--value="${maxPoolPreparedStatementPerConnectionSize}"/>-->

    <!--<property name="testWhileIdle" value="true"/>-->
    <!--<property name="testOnBorrow" value="false"/>-->
    <!--<property name="testOnReturn" value="false"/>-->

    <!--</bean>-->

    <!--<bean id="dataSource" parent="parentDataSource">-->
    <!--<property name="url" value="${170.url}"/>-->
    <!--<property name="username" value="${170.username}"/>-->
    <!--<property name="password" value="${170.password}"/>-->
    <!--</bean>-->
    <!--<bean id="dataSource225" parent="parentDataSource">-->
    <!--<property name="url" value="${225.url}"/>-->
    <!--<property name="username" value="${225.username}"/>-->
    <!--<property name="password" value="${225.password}"/>-->
    <!--</bean>-->
    <!--<bean id="dataSource236" parent="parentDataSource">-->
    <!--<property name="url" value="${236.url}"/>-->
    <!--<property name="username" value="${236.username}"/>-->
    <!--<property name="password" value="${236.password}"/>-->
    <!--</bean>-->

    <!-- 配置SqlSessionFactory
      從spring和mybatis的整合包中獲取
       -->
    <!-- 3. SessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 加載數據源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 整合mybatis，包掃描 mapper文件 -->
        <property name="configLocation" value="classpath:/mybatis/sqlMapConfig.xml"/>

        <property name="mapperLocations" value="classpath:/cn/lpj/dao/*Mapper.xml"/>
    </bean>

    <!--4-->
    <!-- 使用MapperFactoryBean 生成mapper的代理對象
        在mybatis和spring的整合包中
        -->

    <!-- <bean id="sysuserCustomMapper" class="org.mybatis.sprdaopper.MapperFactoryBean">
      配置mapper接口
      <property name="mapperInterface" value="yycg.base.daopper.SysuserCustomMapper"/>
      配置sqlSessionFactory
      <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean> -->


    <!--配置 mapper自動掃描器
   bean名稱就是mapper類型（首字母小寫）
   -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 配置掃描包路徑 ，若是掃描多個包路徑，中間使用半角逗號分隔,不能用* 通配符-->
        <property name="basePackage" value="cn.lpj.dao"/>
        <!-- 配置SqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <!-- 5 事務管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--6 通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 傳播行爲 -->
            <tx:method name="save*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="insert*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="delete*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="update*" propagation="REQUIRED" rollback-for="java.lang.Exception"/>
            <tx:method name="select*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="search*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
            <tx:method name="*" propagation="SUPPORTS"/>
        </tx:attributes>
    </tx:advice>

    <!-- 切面 -->
    <aop:config proxy-target-class="true">
        <aop:advisor advice-ref="txAdvice"
                     pointcut="execution(* cn.lpj.service.impl.*.*(..))"/>
    </aop:config>
</beans>

　　5.springmvc.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:jee="http://www.springframework.org/schema/jee"
       xmlns:lang="http://www.springframework.org/schema/lang"
       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.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
     http://www.springframework.org/schema/jee
     http://www.springframework.org/schema/jee/spring-jee.xsd
     http://www.springframework.org/schema/context
     http://www.springframework.org/schema/context/spring-context.xsd
     http://www.springframework.org/schema/lang
     http://www.springframework.org/schema/lang/spring-lang.xsd
      http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 組件掃描 掃描全部標記@Controller類，因爲使用自動掃描因此Controller類不用在spring配置文件中配置 -->
    <context:component-scan base-package="cn.lpj.controller"/>

    <!-- 處理器映射器和適配器，可使用mvc註解驅動 -->
    <mvc:annotation-driven/>

    <!-- 視圖解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 將jstl的jar包加入工程，默認支持jstl -->
        <!-- 前綴和後綴能夠去掉的，爲了方便開發才加的 -->
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
    <!--進行靜態資源的訪問 -->
    <mvc:resources location="/static/" mapping="/static/**"/>
    <!-- 配置資源文件,防止被攔截 -->
    <!-- <mvc:resources location="/WEB-INF/view/image/" mapping="/image/**"/>
        <mvc:resources location="/WEB-INF/view/js/" mapping="/js/**"/>
<mvc:resources
        location="/WEB-INF/view/css/" mapping="/css/**"/> -->


    <!--攔截器-->
    <mvc:interceptors>
        <!--多個攔截器,順序執行-->
        <!--登錄認證攔截器-->
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <bean class="cn.lpj.interceptor.HandlerInterceptorAdapter"></bean>
        </mvc:interceptor>
        <!--<mvc:interceptor>-->
            <!--<!– /**表示全部url包括子url路徑 –>-->
            <!--<mvc:mapping path="/**"/>-->
            <!--<bean class="cn.lpj.interceptor.HandlerInterceptorAdapter1"></bean>-->
        <!--</mvc:interceptor>-->
    </mvc:interceptors>

    <!-- 攔截器 -->
    <!--<mvc:interceptors>-->
    <!--<bean-->

    <!--class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">-->
    <!--<property name="paramName" value="lang"></property>-->
    <!--</bean>-->
    <!--</mvc:interceptors>-->

    <!--<mvc:interceptors>-->
    <!--<mvc:interceptor>-->
    <!--<mvc:mapping path="/*.do"/>-->
    <!--<mvc:mapping path="/*.ajax"/>-->
    <!--<mvc:mapping path="/*.jsp"/>-->
    <!--<mvc:mapping path="/*.html"/>-->

    <!--<!– 二級目錄 –>-->
    <!--<mvc:mapping path="/*/*.do"/>-->
    <!--<mvc:mapping path="/*/*.ajax"/>-->
    <!--<mvc:mapping path="/*/*.jsp"/>-->
    <!--<mvc:mapping path="/*/*.html"/>-->

    <!--<!– 需排除攔截的地址 –>-->
    <!--<mvc:exclude-mapping path="/login.jsp"/>-->
    <!--<mvc:exclude-mapping path="/login.do"/>-->
    <!--<mvc:exclude-mapping path="/getUserLoginInfo.do"/>-->

    <!--<bean-->

    <!--class="com.ouc.ulab.interceptor.UserSecurityInterceptor"></bean>-->
    <!--</mvc:interceptor>-->
    <!--</mvc:interceptors>-->

    <!--<mvc:interceptors>-->
    <!--<mvc:interceptor>-->
    <!--<mvc:mapping path="/*.do"/>-->
    <!--<mvc:mapping path="/*.ajax"/>-->
    <!--<mvc:mapping path="/*.jsp"/>-->
    <!--<mvc:mapping path="/*.html"/>-->

    <!--<mvc:mapping path="/*/*.do"/>-->
    <!--<mvc:mapping path="/*/*.ajax"/>-->
    <!--<mvc:mapping path="/*/*.jsp"/>-->
    <!--<mvc:mapping path="/*/*.html"/>-->

    <!--<mvc:exclude-mapping path="/login.jsp"/>-->
    <!--<mvc:exclude-mapping path="/login.do"/>-->
    <!--<mvc:exclude-mapping path="/loadHome.do"/>-->
    <!--<mvc:exclude-mapping path="/getUserLoginInfo.do"/>-->

    <!--<bean-->

    <!--class="com.ouc.ulab.interceptor.AuthoritySecurityInterceptor">-->
    <!--</bean>-->
    <!--</mvc:interceptor>-->
    <!--</mvc:interceptors>-->

</beans>

　　7.

package cn.lpj.utils;

/**
 * Created by Administrator on 2017/5/18.
 */
public class CustomerContextHolder {
    public static final String DATA_SOURCE_170 = "dataSource-170";
    public static final String DATA_SOURCE_236 = "dataSource-236";
    public static final String DATA_SOURCE_225 = "dataSource-225";
    private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();

    public static void setCustomerType(String customerType) {
        contextHolder.set(customerType);
    }
    public static String getCustomerType() {
        return contextHolder.get();
    }
//    public static void clearCustomerType() {
//        contextHolder.remove();
//    }

    public CustomerContextHolder() {
        contextHolder.remove();
    }
}

/**
 * Created by Administrator on 2017/5/18.
 */
public class DynamicDataSource extends AbstractRoutingDataSource {
    @Override
    protected Object determineCurrentLookupKey() {
        return CustomerContextHolder.getCustomerType();
    }
}

　　

package cn.lpj.interceptor;

import cn.lpj.utils.CustomerContextHolder;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Created by Administrator on 2017/5/18.
 */

public class HandlerInterceptorAdapter implements HandlerInterceptor {
    /**
     * preHandle方法是進行處理器攔截用的，顧名思義，該方法將在Controller處理以前進

     行調用，SpringMVC中的Interceptor攔截器是鏈式的，能夠同時存在
     * 多個Interceptor，而後SpringMVC會根據聲明的先後順序一個接一個的執行，並且全部

     的Interceptor中的preHandle方法都會在
     * Controller方法調用以前調用。SpringMVC的這種Interceptor鏈式結構也是能夠進行中

     斷的，這種中斷方式是令preHandle的返
     * 回值爲false，當preHandle的返回值爲false的時候整個請求就結束了。
     */

    // 在業務處理器處理請求以前被調用
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        CustomerContextHolder customerContextHolder = new CustomerContextHolder();
        customerContextHolder.setCustomerType(CustomerContextHolder.DATA_SOURCE_170);
        System.out.println("-------------------------------------");
        System.out.println("----------------我被執行了---------------------");

        return true;
    }
    /**
     * 這個方法只會在當前這個Interceptor的preHandle方法返回值爲true的時候纔會執行。

     postHandle是進行處理器攔截用的，它的執行時間是在處理器進行處理之
     * 後，也就是在Controller的方法調用以後執行，可是它會在DispatcherServlet進行視

     圖的渲染以前執行，也就是說在這個方法中你能夠對ModelAndView進行操
     * 做。這個方法的鏈式結構跟正常訪問的方向是相反的，也就是說先聲明的Interceptor

     攔截器該方法反而會後調用，這跟Struts2裏面的攔截器的執行過程有點像，
     * 只是Struts2裏面的intercept方法中要手動的調用ActionInvocation的invoke方法，

     Struts2中調用ActionInvocation的invoke方法就是調用下一個Interceptor
     * 或者是調用action，而後要在Interceptor以前調用的內容都寫在調用invoke以前，要

     在Interceptor以後調用的內容都寫在調用invoke方法以後。
     */
    // 在業務處理器處理請求完成以後，生成視圖以前執行
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
            throws Exception {
        System.out.println("----在Action方法執行完畢以後,執行(沒有拋異常的話)----------");
    }
    /**
     * 該方法也是須要當前對應的Interceptor的preHandle方法的返回值爲true時纔會執行。

     該方法將在整個請求完成以後，也就是DispatcherServlet渲染了視圖執行，
     * 這個方法的主要做用是用於清理資源的，固然這個方法也只能在當前這個Interceptor

     的preHandle方法的返回值爲true時纔會執行。
     */
    // 在DispatcherServlet徹底處理完請求以後被調用，可用於清理資源
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {

        System.out.println("----在Action 方法執行完畢以後,不管是否拋出異常,一般用來進行異常處理----------");


    }

}

　　

package cn.lpj.controller;

import cn.lpj.pojo.City;
import cn.lpj.service.CityService;
import cn.lpj.utils.CustomerContextHolder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.annotation.Resource;
import java.util.List;

/**
 * Created by Administrator on 2017/5/4.
 */
@Controller
@RequestMapping(value = "/city")
public class CityController {
    @Resource
    private CityService cityService;
    private final static Logger logger = LoggerFactory.getLogger(CityController.class);

    @RequestMapping(value = "/searchCity")
    public String searchCity(Model model) {
        CustomerContextHolder customerContextHolder = new CustomerContextHolder();
        customerContextHolder.setCustomerType(CustomerContextHolder.DATA_SOURCE_170);


        City city = new City();
        city.setId(1);
        List<City> cityList = cityService.searchCity(city);
        System.out.println(cityList.get(0).getCity());
        logger.info("logback 成功了--------------------------------------");
        logger.error("logback 成功了");
        model.addAttribute("cityList", cityList);
        return "city/city";
    }
}

/**
 * Created by Administrator on 2017/5/4.
 */
@Controller
@RequestMapping(value = "/conf")
public class ConfController {
    @Resource
    private ConfService confService;
    @RequestMapping(value = "/searchConf")
    public String searchConf(Model model){

        Conf conf = new Conf();
        conf.setId(1);
        List<Conf> list = confService.searchConf(conf);
        model.addAttribute("list",list);
        return "conf/conf";
    }


}

/**
 * Created by Administrator on 2017/5/5.
 */
@Controller
@RequestMapping(value = "/menu")
public class MenuController {
    @Resource
    private MenuService menuService;
    @RequestMapping(value = "/searchMenu")
    public String searchMenu(Model model) {


        CustomerContextHolder customerContextHolder = new CustomerContextHolder();
        customerContextHolder.setCustomerType(CustomerContextHolder.DATA_SOURCE_236);

        Menu menu = new Menu();
        menu.setId(2);
        List<Menu> list = menuService.searchMenu(menu);
        System.out.println(list.get(0).getMenu());
        return "menu/menu";
    }


}

　　

 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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         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>simfence</display-name>
  <!-- 1 加載spring容器 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
      classpath:/spring/applicationContext.xml,
      classpath:/spring/applicationContext-*.xml
    </param-value>
  </context-param>
  <!--Spring ApplicationContext 載入 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

  <!--2 springmvc的前端控制器 -->
  <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/springmvc.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
    <!--<url-pattern>/</url-pattern>-->
  </servlet-mapping>
  <!-- 解決post亂碼 -->
  <!-- Character Encoding filter -->
  <filter>
    <filter-name>encodingFilter</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>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
  </filter-mapping>

  <!-- 鏈接池 啓用 Web 監控統計功能    start-->
  <!--<filter>-->
  <!--<filter-name>DruidWebStatFilter</filter-name>-->
  <!--<filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>-->
  <!--<init-param>-->
  <!--<param-name>exclusions</param-name>-->
  <!--<param-value>*. js ,*. gif ,*. jpg ,*. png ,*. css ,*. ico ,/ druid /*</param-value>-->
  <!--</init-param>-->
  <!--</filter>-->
  <!--<filter-mapping>-->
  <!--<filter-name>DruidWebStatFilter</filter-name>-->
  <!--<url-pattern>/*</url-pattern>-->
  <!--</filter-mapping>-->

  <!--<servlet>-->
  <!--<servlet-name>DruidStatView</servlet-name>-->
  <!--<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>-->
  <!--</servlet>-->
  <!--<servlet-mapping>-->
  <!--<servlet-name>DruidStatView</servlet-name>-->
  <!--<url-pattern>/druid/*</url-pattern>-->
  <!--</servlet-mapping>-->
  <servlet>
    <servlet-name>DruidStatView</servlet-name>
    <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>DruidStatView</servlet-name>
    <url-pattern>/druid/*</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>druidWebStatFilter</filter-name>
    <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
    <init-param>
      <param-name>exclusions</param-name>
      <param-value>/public/*,*.js,*.css,/druid*,*.jsp,*.swf</param-value>
    </init-param>
    <init-param>
      <param-name>principalSessionName</param-name>
      <param-value>sessionInfo</param-value>
    </init-param>
    <init-param>
      <param-name>profileEnable</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>druidWebStatFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- 鏈接池 啓用 Web 監控統計功能    end-->
</web-app>

　　常見問題：

開始用的時候常常出現的問題，覺得是密碼帳戶錯誤，後來檢查多遍，發現是在配置文件中多了幾個空格的緣由；注意