• 多数据源切换(拦截器)


    参考博客: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 版本号 -->
        <druid.version>1.0.29</druid.version>
        <dbcp.version>1.2.2</dbcp.version>
        <c3p0.version>0.9.1.2</c3p0.version>
        <!--日志 s-->
        <logback.version>1.2.3</logback.version>
        <slf4j.version>1.7.7</slf4j.version>
        <!--日志 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织入-->
        <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-->
    
        <!-- 整合数据库连接池 s-->
    
        <!--druid 连接池-->
        <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>
        <!-- 整合数据库连接池 e-->
    
    
        <!-- 数据库驱动 -->
        <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>
    
        <!-- 第三方常用jar包 -->
        <!--日志 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 -->
        <!--解决数据量大的问题-->
    
        <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>
        <!--解决数据量大的问题-->
        <!--报表-->
        <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>
    
        <!--文件上传-->
        <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冲突 -->
        <!--<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
    #监控统计用的filter:stat
    #日志用的filter:log4j
    #防御sql注入的filter:wal
    
    maxActive:20
    initialSize:1
    maxWait:60000
    minIdle:10
    #maxIdle:15
    
    timeBetweenEvictionRunsMillis:60000
    minEvictableIdleTimeMillis:300000
    maxPoolPreparedStatementPerConnectionSize:20
    #用来检测连接是否有效的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">
    
    
        <!-- 加载配置文件 -->
        <!--<context:property-placeholder location="classpath:jdbc.properties"/>-->
        <!--<context:property-placeholder location="classpath:druid.properties"/>-->
        <!--  jdbc数据库连接池
         <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}"/>–>
             <!– 开发阶段建议最大连接数据尽量少,够用即可 –>
             <property name="maxActive" value="${jdbc.maxActive}"/>
             <property name="maxIdle" value="${jdbc.maxIdle}"/>
         </bean>-->
    
    
        <!-- 1. 加载数据库配置的属性文件 -->
    
        <bean id="propertyConfigurer"
              class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
            <property name="locations">
                <list>
                    <value>classpath:/druid.properties</value>
                </list>
            </property>
        </bean>
        <!--2. 数据源dataSource-->
        <bean id="parentDataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"
              init-method="init">
            <!-- 数据库基本信息配置 -->
            <property name="url" value="${url}"/>
            <property name="username" value="${username}"/>
            <property name="password" value="${password}"/>
            <property name="driverClassName" value="${driverClassName}"/>
    
            <!-- 最大并发连接数 -->
            <property name="maxActive" value="${maxActive}"/>
            <!-- 初始化连接数量 -->
            <property name="initialSize" value="${initialSize}"/>
            <!-- 配置获取连接等待超时的时间 -->
            <property name="maxWait" value="${maxWait}"/>
            <!-- 最小空闲连接数 -->
            <property name="minIdle" value="${minIdle}"/>
            <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->
            <property name="timeBetweenEvictionRunsMillis" value="${timeBetweenEvictionRunsMillis}"/>
            <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->
            <property name="minEvictableIdleTimeMillis" value="${minEvictableIdleTimeMillis}"/>
            <property name="validationQuery" value="${validationQuery}"/>
            <property name="testWhileIdle" value="${testWhileIdle}"/>
            <property name="testOnBorrow" value="${testOnBorrow}"/>
            <property name="testOnReturn" value="${testOnReturn}"/>
    
            <!-- 打开PSCache,并且指定每个连接上PSCache的大小 -->
            <property name="poolPreparedStatements" value="${poolPreparedStatements}"/>
            <property name="maxOpenPreparedStatements" value="${maxOpenPreparedStatements}"/>
    
            <!-- 打开 removeAbandoned 功能 -->
            <property name="removeAbandoned" value="${removeAbandoned}"/>
            <!-- 1800 秒,也就是 30 分钟 -->
            <property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}"/>
            <!-- 关闭 abanded 连接时输出错误日志 -->
            <property name="logAbandoned" value="${logAbandoned}"/>
    
            <property name="filters" value="${filters}"/>
            <!-- 解密密码必须要配置的项 -->
            <!--<property name="filters" value="config" />-->
            <!--<property name="connectionProperties" value="config.decrypt=true;config.decrypt.key=${publicKey}" />-->
    
            <!-- 这里配置提交方式,默认就是TRUE,可以不用配置 -->
            <property name="defaultAutoCommit" value="true"/>
            <!-- 验证连接有效与否的SQL,不同的数据配置不同 -->
            <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
          从spring和mybatis的整合包中获取
           -->
        <!-- 3. SessionFactory -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!-- 加载数据源 -->
            <property name="dataSource" ref="dataSource"/>
            <!-- 整合mybatis,包扫描 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的代理对象
            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自动扫描器
       bean名称就是mapper类型(首字母小写)
       -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <!-- 配置扫描包路径 ,如果扫描多个包路径,中间使用半角逗号分隔,不能用* 通配符-->
            <property name="basePackage" value="cn.lpj.dao"/>
            <!-- 配置SqlSessionFactory -->
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        </bean>
    
        <!-- 5 事务管理器 -->
        <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>
                <!-- 传播行为 -->
                <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">
    
        <!-- 组件扫描 扫描所有标记@Controller类,由于使用自动扫描所以Controller类不用在spring配置文件中配置 -->
        <context:component-scan base-package="cn.lpj.controller"/>
    
        <!-- 处理器映射器和适配器,可以使用mvc注解驱动 -->
        <mvc:annotation-driven/>
    
        <!-- 视图解析器 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!-- 将jstl的jar包加入工程,默认支持jstl -->
            <!-- 前缀和后缀可以去掉的,为了方便开发才加的 -->
            <property name="prefix" value="/WEB-INF/views/"/>
            <property name="suffix" value=".jsp"/>
        </bean>
        <!--进行静态资源的访问 -->
        <mvc:resources location="/static/" mapping="/static/**"/>
        <!-- 配置资源文件,防止被拦截 -->
        <!-- <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/**"/> -->
    
    
        <!--拦截器-->
        <mvc:interceptors>
            <!--多个拦截器,顺序执行-->
            <!--登陆认证拦截器-->
            <mvc:interceptor>
                <mvc:mapping path="/**"/>
                <bean class="cn.lpj.interceptor.HandlerInterceptorAdapter"></bean>
            </mvc:interceptor>
            <!--<mvc:interceptor>-->
                <!--<!– /**表示所有url包括子url路径 –>-->
                <!--<mvc:mapping path="/**"/>-->
                <!--<bean class="cn.lpj.interceptor.HandlerInterceptorAdapter1"></bean>-->
            <!--</mvc:interceptor>-->
        </mvc:interceptors>
    
        <!-- 拦截器 -->
        <!--<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"/>-->
    
        <!--<!– 二级目录 –>-->
        <!--<mvc:mapping path="/*/*.do"/>-->
        <!--<mvc:mapping path="/*/*.ajax"/>-->
        <!--<mvc:mapping path="/*/*.jsp"/>-->
        <!--<mvc:mapping path="/*/*.html"/>-->
    
        <!--<!– 需排除拦截的地址 –>-->
        <!--<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方法是进行处理器拦截用的,顾名思义,该方法将在Controller处理之前进
    
         行调用,SpringMVC中的Interceptor拦截器是链式的,可以同时存在
         * 多个Interceptor,然后SpringMVC会根据声明的前后顺序一个接一个的执行,而且所有
    
         的Interceptor中的preHandle方法都会在
         * Controller方法调用之前调用。SpringMVC的这种Interceptor链式结构也是可以进行中
    
         断的,这种中断方式是令preHandle的返
         * 回值为false,当preHandle的返回值为false的时候整个请求就结束了。
         */
    
        // 在业务处理器处理请求之前被调用
        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("----------------我被执行了---------------------");
    
            return true;
        }
        /**
         * 这个方法只会在当前这个Interceptor的preHandle方法返回值为true的时候才会执行。
    
         postHandle是进行处理器拦截用的,它的执行时间是在处理器进行处理之
         * 后,也就是在Controller的方法调用之后执行,但是它会在DispatcherServlet进行视
    
         图的渲染之前执行,也就是说在这个方法中你可以对ModelAndView进行操
         * 作。这个方法的链式结构跟正常访问的方向是相反的,也就是说先声明的Interceptor
    
         拦截器该方法反而会后调用,这跟Struts2里面的拦截器的执行过程有点像,
         * 只是Struts2里面的intercept方法中要手动的调用ActionInvocation的invoke方法,
    
         Struts2中调用ActionInvocation的invoke方法就是调用下一个Interceptor
         * 或者是调用action,然后要在Interceptor之前调用的内容都写在调用invoke之前,要
    
         在Interceptor之后调用的内容都写在调用invoke方法之后。
         */
        // 在业务处理器处理请求完成之后,生成视图之前执行
        public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
                throws Exception {
            System.out.println("----在Action方法执行完毕之后,执行(没有抛异常的话)----------");
        }
        /**
         * 该方法也是需要当前对应的Interceptor的preHandle方法的返回值为true时才会执行。
    
         该方法将在整个请求完成之后,也就是DispatcherServlet渲染了视图执行,
         * 这个方法的主要作用是用于清理资源的,当然这个方法也只能在当前这个Interceptor
    
         的preHandle方法的返回值为true时才会执行。
         */
        // 在DispatcherServlet完全处理完请求之后被调用,可用于清理资源
        public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
                throws Exception {
    
            System.out.println("----在Action 方法执行完毕之后,无论是否抛出异常,通常用来进行异常处理----------");
    
    
        }
    
    }
    

      

    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 加载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 载入 -->
      <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>
      <!-- 解决post乱码 -->
      <!-- 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>
    
      <!-- 连接池 启用 Web 监控统计功能    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>
    
      <!-- 连接池 启用 Web 监控统计功能    end-->
    </web-app>
    

      常见问题:

    开始用的时候经常出现的问题,以为是密码账户错误,后来检查多遍,发现是在配置文件中多了几个空格的原因;注意

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  • 原文地址:https://www.cnblogs.com/jwlfpzj/p/6874347.html
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