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spring+springMVC+JPA配置详解(使用缓存框架ehcache)

时间:2016-05-24 18:47:54      阅读:662      评论:0      收藏:0      [点我收藏+]

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SpringMVC是越来越火,自己也弄一个Spring+SpringMVC+JPA的简单框架。

  1、搭建环境。

    1)下载Spring3.1.2的发布包;Hibernate4.1.7的发布包(没有使用hibernate的API,只是使用了它对JPA的实现);下载 BoneCP 连接池框架及其依赖的jar,下载缓存框架ehcache,全部所用到的jar包如下:  

?

antlr-2.7.7.jar

bonecp-0.7.1.RELEASE.jar

bonecp-provider-0.7.1-rc2.jar

bonecp-spring-0.7.1-rc1.jar

com.springsource.net.sf.cglib-2.2.0.jar

com.springsource.org.aopalliance-1.0.0.jar

com.springsource.org.apache.commons.logging-1.1.1.jar

com.springsource.org.aspectj.weaver-1.6.12.RELEASE.jar

dom4j-1.6.1.jar

ehcache-core-2.5.2.jar<br>ehcache-spring-annotations-1.2.0.jar

guava-12.0.jar

hibernate-commons-annotations-4.0.1.Final.jar

hibernate-core-4.1.7.Final.jar

hibernate-entitymanager-4.1.7.Final.jar

hibernate-jpa-2.0-api-1.0.1.Final.jar

javassist-3.15.0-GA.jar

jboss-logging-3.1.0.GA.jar

jboss-transaction-api_1.1_spec-1.0.0.Final.jar

log4j-1.2.17.jar

mysql-connector-java-5.1.6-bin.jar

org.springframework.aop-3.1.2.RELEASE.jar

org.springframework.asm-3.1.2.RELEASE.jar

org.springframework.aspects-3.1.2.RELEASE.jar

org.springframework.beans-3.1.2.RELEASE.jar

org.springframework.context-3.1.2.RELEASE.jar

org.springframework.context.support-3.1.2.RELEASE.jar

org.springframework.core-3.1.2.RELEASE.jar

org.springframework.expression-3.1.2.RELEASE.jar

org.springframework.instrument-3.1.2.RELEASE.jar

org.springframework.instrument.tomcat-3.1.2.RELEASE.jar

org.springframework.jdbc-3.1.2.RELEASE.jar

org.springframework.jms-3.1.2.RELEASE.jar

org.springframework.orm-3.1.2.RELEASE.jar

org.springframework.oxm-3.1.2.RELEASE.jar

org.springframework.test-3.1.2.RELEASE.jar

org.springframework.transaction-3.1.2.RELEASE.jar

org.springframework.web-3.1.2.RELEASE.jar

org.springframework.web.portlet-3.1.2.RELEASE.jar

org.springframework.web.servlet-3.1.2.RELEASE.jar

slf4j-api-1.6.1.jar

slf4j-nop-1.6.1.jar

   2)建立一个Web Project,引入上述jar包

    2.1)web.xml配置如下:

 

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

   

    <!-- 配置Log4j -->

    <context-param>

          <param-name>webAppRootKey</param-name>

          <param-value>spring_springmvc_jpa.root</param-value>

    </context-param>

    <context-param>

          <param-name>log4jConfigLocation</param-name>

          <param-value>classpath:log4j.properties</param-value>

    </context-param>

    <listener>

          <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>

    </listener>

   

    <!-- 配置编码过滤器 -->

    <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>

    </filter>

    <filter-mapping>

          <filter-name>characterEncodingFilter</filter-name>

          <url-pattern>/*</url-pattern>

    </filter-mapping>

   

    <!-- 配置Spring监听器 -->

    <listener>

        <listener-class>

            org.springframework.web.context.ContextLoaderListener

        </listener-class>

    </listener>

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>/WEB-INF/applicationContext.xml</param-value>

    </context-param>

 

    <!-- Spring 刷新Introspector防止内存泄露 -->

    <listener>

        <listener-class>

            org.springframework.web.util.IntrospectorCleanupListener

        </listener-class>

    </listener>

 

   

    <!-- SpringMVC核心分发器 -->

    <servlet>

          <servlet-name>dispatcherServlet</servlet-name>

          <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

          <init-param>

                  <param-name>contextConfigLocation</param-name>

                  <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>

          </init-param>

          <load-on-startup>1</load-on-startup>

     </servlet>

     <!-- 映射*.do的请求 -->

     <servlet-mapping>

             <servlet-name>dispatcherServlet</servlet-name>

             <url-pattern>*.do</url-pattern>

     </servlet-mapping>

 

   

  <welcome-file-list>

    <welcome-file>index.jsp</welcome-file>

  </welcome-file-list>

</web-app>

 

    2.2)在src目录下建立log4j.properties日志配置文件,内容如下:

 

log4j.rootLogger=INFO,stdout,file

 

#应用于控制台

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

log4j.appender.stdout.Target=System.out

log4j.appender.stdout.layout.ConversionPattern=%-d{yyyy-MM-dd HH\:mm\:ss,SSS} [%c]-[%p] %m%n

#应用于文件

log4j.appender.file=org.apache.log4j.DailyRollingFileAppender

log4j.appender.file.File=${spring_springmvc_jpa.root}/app.log

log4j.appender.file.layout=org.apache.log4j.PatternLayout

log4j.appender.R.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] [%c] [%p] - %m%n

 

 

log4j.logger.org.hibernate.tool.hbm2ddl=debug

 

    2.3)在src目录下建立缓存的配置文件ehcache.xml,内容如下:

 

<?xml version="1.0" encoding="UTF-8"?>

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

         xsi:noNamespaceSchemaLocation="ehcache.xsd"

         updateCheck="true" monitoring="autodetect"

         dynamicConfig="true">

 

   <!--  <diskStore path="java.io.tmpdir"/> -->

  

   <!-- 配置缓存文件存放路径 -->

   <diskStore path="E:/CacheTmpDir" />

 

   <!--  

       

        1.必须要有的属性:  

       

        name: cache的名字,用来识别不同的cache,必须惟一。  

       

        maxElementsInMemory: 内存管理的缓存元素数量最大限值。  

       

        maxElementsOnDisk: 硬盘管理的缓存元素数量最大限值。默认值为0,就是没有限制。  

       

        eternal: 设定元素是否持久话。若设为true,则缓存元素不会过期。  

       

        overflowToDisk: 设定是否在内存填满的时候把数据转到磁盘上。  

       

        2.下面是一些可选属性:  

       

        timeToIdleSeconds: 设定元素在过期前空闲状态的时间,只对非持久性缓存对象有效。默认值为0,值为0意味着元素可以闲置至无限长时间。  

       

        timeToLiveSeconds: 设定元素从创建到过期的时间。其他与timeToIdleSeconds类似。  

       

        diskPersistent: 设定在虚拟机重启时是否进行磁盘存储,默认为false.(我的直觉,对于安全小型应用,宜设为true)。  

       

        diskExpiryThreadIntervalSeconds: 访问磁盘线程活动时间。  

       

        diskSpoolBufferSizeMB: 存入磁盘时的缓冲区大小,默认30MB,每个缓存都有自己的缓冲区。  

       

        memoryStoreEvictionPolicy: 元素逐出缓存规则。共有三种,Recently Used (LRU)最近最少使用,为默认。

        First In First Out (FIFO),先进先出。Less Frequently Used(specified as LFU)最少使用 

       

    -->

  

  <defaultCache maxElementsInMemory="10000"

                    eternal="false"

                    timeToIdleSeconds="120"

                    timeToLiveSeconds="120"

                    overflowToDisk="true"

                    maxElementsOnDisk="10000000"

                    diskPersistent="false"

                    diskExpiryThreadIntervalSeconds="120"

                    memoryStoreEvictionPolicy="LRU" />

                   

    <!-- User cache -->

    <cache name="userCache"

          maxElementsInMemory="10000"

          maxElementsOnDisk="1000"

          eternal="false"

          overflowToDisk="true"

          diskSpoolBufferSizeMB="20"

          timeToIdleSeconds="300"

          timeToLiveSeconds="600"

          memoryStoreEvictionPolicy="LFU" />

         

</ehcache>

 

    2.4)在src目录下建立数据库连接属性配置文件jdbc.properties,内容如下:

 

#mysql数据库用

jdbc.driverClassName=com.mysql.jdbc.Driver

jdbc.url=jdbc:mysql://localhost:3306/spring_springmvc_jpa?useUnicode=true&amp;characterEncoding=UTF-8

jdbc.username=root

jdbc.password=root

 

 

##===============BoneCP配置==============##

 

#检查数据库连接池中空闲连接的间隔时间,单位是分,默认值:240,如果要取消则设置为0#

BoneCP.idleConnectionTestPeriod=60

 

#连接池中未使用的链接最大存活时间,单位是分,默认值:60,如果要永远存活设置为0#

BoneCP.idleMaxAge=60

 

#每个分区最大的连接数# 

BoneCP.maxConnectionsPerPartition=5

 

#每个分区最小的连接数# 

BoneCP.minConnectionsPerPartition=1

 

#分区数 ,默认值2,最小1,推荐3-4,视应用而定# 

BoneCP.partitionCount=3

 

#每次去拿数据库连接的时候一次性要拿几个,默认值:2# 

BoneCP.acquireIncrement=2 

 

#缓存prepared statements的大小,默认值:0# 

BoneCP.statementsCacheSize=0

 

#每个分区释放链接助理进程的数量,默认值:3,除非你的一个数据库连接的时间内做了很多工作,不然过多的助理进程会影响你的性能# 

BoneCP.releaseHelperThreads=3

 

    2.5)在WEB-INF目录下建立Spring的配置文件applicationContext.xml,内容如下:<?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:context="http://www.springframework.org/schema/context"

               xmlns:p="http://www.springframework.org/schema/p" 

               xmlns:cache="http://www.springframework.org/schema/cache" 

         xmlns:ehcache="http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring"  

               xsi:schemaLocation="

                    http://www.springframework.org/schema/beans

                    http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

                    http://www.springframework.org/schema/tx

                    http://www.springframework.org/schema/tx/spring-tx-3.1.xsd

                    http://www.springframework.org/schema/aop

                    http://www.springframework.org/schema/aop/spring-aop-3.1.xsd

                    http://www.springframework.org/schema/context     

                    http://www.springframework.org/schema/context/spring-context-3.1.xsd

                    http://www.springframework.org/schema/cache

                     http://www.springframework.org/schema/cache/spring-cache-3.1.xsd

            http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring

            http://ehcache-spring-annotations.googlecode.com/svn/schema/ehcache-spring/ehcache-spring-1.1.xsd">

 

   

 

       

        <!-- 注解支持 -->

        <context:annotation-config />

       

        <!-- 启动组件扫描,排除@Controller组件,该组件由SpringMVC配置文件扫描 -->

        <context:component-scan base-package="cn.luxh.app">

            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> 

        </context:component-scan>

   

        <!-- 属性文件位置 -->

        <context:property-placeholder location="classpath:jdbc.properties" />

       

        <!-- 数据源 -->

        <bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">

            <!-- 数据库驱动 -->

            <property name="driverClass" value="${jdbc.driverClassName}" />

            <!-- 相应驱动的jdbcUrl-->

            <property name="jdbcUrl" value="${jdbc.url}" />

            <!-- 数据库的用户名 -->

            <property name="username" value="${jdbc.username}" />

            <!-- 数据库的密码 -->

            <property name="password" value="${jdbc.password}" />

            <!-- 检查数据库连接池中空闲连接的间隔时间,单位是分,默认值:240,如果要取消则设置为0 -->

            <property name="idleConnectionTestPeriod" value="${BoneCP.idleConnectionTestPeriod}" />

            <!-- 连接池中未使用的链接最大存活时间,单位是分,默认值:60,如果要永远存活设置为0 -->

            <property name="idleMaxAge" value="${BoneCP.idleMaxAge}" />

            <!-- 每个分区最大的连接数 -->

            <property name="maxConnectionsPerPartition" value="${BoneCP.maxConnectionsPerPartition}" />

            <!-- 每个分区最小的连接数 -->

            <property name="minConnectionsPerPartition" value="${BoneCP.minConnectionsPerPartition}" />

            <!-- 分区数 ,默认值2,最小1,推荐3-4,视应用而定 -->

            <property name="partitionCount" value="${BoneCP.partitionCount}" />

            <!-- 每次去拿数据库连接的时候一次性要拿几个,默认值:2 -->

            <property name="acquireIncrement" value="${BoneCP.acquireIncrement}" />

            <!-- 缓存prepared statements的大小,默认值:0 -->

            <property name="statementsCacheSize" value="${BoneCP.statementsCacheSize}" />

            <!-- 每个分区释放链接助理进程的数量,默认值:3,除非你的一个数据库连接的时间内做了很多工作,不然过多的助理进程会影响你的性能 -->

            <property name="releaseHelperThreads" value="${BoneCP.releaseHelperThreads}" />

       </bean>

      

     <!-- JPA实体管理器工厂 -->

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 

           <property name="dataSource" ref="dataSource"/>

           <property name="persistenceProvider" ref="persistenceProvider"/>

           <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/> 

      <property name="jpaDialect" ref="jpaDialect"/> 

          

           <property name="packagesToScan" value="cn.luxh.app.entity"/>

          

           <property name="jpaProperties">

            <props>

             <prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>

             <prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driver</prop>

             <prop key="hibernate.max_fetch_depth">3</prop>

             <prop key="hibernate.jdbc.fetch_size">18</prop>

             <prop key="hibernate.jdbc.batch_size">10</prop>

             <prop key="hibernate.hbm2ddl.auto">update</prop>

             <prop key="hibernate.show_sql">true</prop>

             <prop key="hibernate.format_sql">true</prop>

             <prop key="javax.persistence.validation.mode">none</prop>

            </props>

           </property>

       </bean>

       <!-- 用于指定持久化实现厂商类 -->

       <bean id="persistenceProvider" class="org.hibernate.ejb.HibernatePersistence"/>

       <!-- 用于设置JPA实现厂商的特定属性 -->

       <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 

     <property name="database" value="MYSQL"/> 

    </bean> 

    <!-- 用于指定一些高级特性 -->

    <bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/> 

             

       <!-- 事务管理器 --> 

       <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 

           <property name="entityManagerFactory" ref="entityManagerFactory" /> 

       </bean>

       

       <!-- 注解式事务 -->

       <tx:annotation-driven transaction-manager="txManager"/>

      

        <!-- 启用缓存注解功能 -->

       <ehcache:annotation-driven cache-manager="ehCacheManager" />  

    

      

       <!-- cacheManager工厂类,指定ehcache.xml的位置 -->   

       <bean id="ehCacheManager" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean"

              p:configLocation="classpath:/ehcache.xml"/>

 

</beans>

 

 

    2.6)在WEB-INF目录下建立SpringMVC的配置文件dispatcher-servlet.xml,内容如下:

 

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

             xmlns:mvc="http://www.springframework.org/schema/mvc"

             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

             xmlns:context="http://www.springframework.org/schema/context"

             xsi:schemaLocation="

                http://www.springframework.org/schema/beans

                http://www.springframework.org/schema/beans/spring-beans-3.1.xsd

                http://www.springframework.org/schema/context

                http://www.springframework.org/schema/context/spring-context-3.1.xsd

                http://www.springframework.org/schema/mvc

                http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd">

 

      

 

 

        <mvc:annotation-driven/>

        <context:component-scan base-package="cn.luxh.app.controller"/>

 

       

        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

                <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>

                <property name="prefix" value="/WEB-INF/jsp/"/>

                <property name="suffix" value=".jsp"/>

        </bean>

 

</beans>

 

  2、编写代码

    1)在WEB-INF目录下建立名叫jsp的文件夹,用于放置jsp页面,和SpringMVC配置文件中的<property name="prefix" value="/WEB-INF/jsp/"/>相对应。

    2)创建一个实体。  

 

package cn.luxh.app.entity.privilege;

 

import java.io.Serializable;

 

import javax.persistence.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.Id;

import javax.persistence.Table;

 

 

/**

 * 用户信息

 * @author Luxh

 */

 

@Entity

@Table(name="t_user_info")

public class UserInfo implements Serializable{

 

    private static final long serialVersionUID = -3838732995856086555L;

   

    @Id

    @GeneratedValue

    private Long id;

   

    //账号

    @Column(length=20,nullable=false)

    private String account;

    //密码

    @Column(length=20,nullable=false)

    private String password;

    //姓名

    @Column(length=32,nullable=false)

    private String name;

   

    //getter、setter

    //......

   

 

}

 

    3)通用DAO,用于其他DAO继承,

      3.1)接口

 

package cn.luxh.app.dao.base;

 

/**

 * 通用的DAO

 * @author Luxh

 */

public interface BaseDao {

   

    /**

     * 持久化实体

     * @param entity

     */

    void save(Object entity);

   

    /**

     * 根据主键查询实体

     * @param <T>

     * @param clazz  实体类

     * @param id     主键

     * @return

     */

    <T> T getById(Class<T> clazz,Object id);

}

 

      3.2)实现

 

package cn.luxh.app.dao.base;

 

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

 

import org.springframework.stereotype.Repository;

 

/**

 * 通用DAO实现

 * @author Luxh

 */

 

@Repository

public class BaseDaoImpl implements BaseDao{

   

    //注入实体管理器

    @PersistenceContext

    protected EntityManager em;

   

    public <T> T getById(Class<T> clazz, Object id) {

        return em.find(clazz, id);

    }

   

    public void save(Object entity) {

        em.persist(entity);

    }

   

}

 

    4)UserDao,继承于通用DAO

      4.1)接口  

 

package cn.luxh.app.dao.privilege;

 

import cn.luxh.app.dao.base.BaseDao;

 

/**

 * User Dao Interface

 * @author Luxh

 */

public interface UserDao extends BaseDao{

 

}

 

      4.2)实现

 

package cn.luxh.app.dao.privilege;

 

import org.springframework.stereotype.Repository;

 

import cn.luxh.app.dao.base.BaseDaoImpl;

 

/**

 * User DAO Implement

 * @author Luxh

 */

 

@Repository

public class UserDaoImpl extends BaseDaoImpl implements UserDao{

 

}

 

  5)通用的业务接口

    这里只写一个接口,留给其他Service实现。

 

package cn.luxh.app.service.base;

 

/**

 * 通用业务接口

 * @author Luxh

 */

public interface BaseService {

   

    /**

     * 保存实体

     * @param entity

     */

    void save(Object entity);

   

    /**

     * 根据主键获取对象

     * @param <T>

     * @param clazz 实体类

     * @param id    主键

     * @return

     */

    <T> T getById(Class<T> clazz,Object id);

}

 

    6)用户业务接口UserService,实现通用业务接口的方法,并加上缓存

      6.1)接口

 

package cn.luxh.app.service.privilege;

 

import cn.luxh.app.service.base.BaseService;

 

/**

 * User Service

 * @author Luxh

 */

public interface UserService extends BaseService {

   

}

 

      6.2)实现

 

package cn.luxh.app.service.privilege;

 

import org.springframework.beans.factory.annotation.Autowired;

import com.googlecode.ehcache.annotations.TriggersRemove;

import com.googlecode.ehcache.annotations.Cacheable;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Propagation;

import org.springframework.transaction.annotation.Transactional;

 

import cn.luxh.app.dao.privilege.UserDao;

 

/**

 * User Service Implement

 * @author Luxh

 */

 

@Service

public class UserServiceImpl implements UserService{

   

    @Autowired

    private UserDao userDao;

   

    @Cacheable(cacheName="userCache")//缓存数据

    public <T> T getById(Class<T> clazz, Object id) {

        return userDao.getById(clazz, id);

    }

 

    @Transactional(propagation=Propagation.REQUIRED)

    @TriggersRemove(cacheName="userCache",removeAll=true)//清除缓存

    public void save(Object entity) {

        userDao.save(entity);

    }

   

}

 

    7)控制层,暂时还没有写一个公共的Controller用于被继承,就直接写UserController吧

 

package cn.luxh.app.controller.privilege;

 

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Controller;

import org.springframework.ui.ModelMap;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestParam;

import org.springframework.web.servlet.mvc.support.RedirectAttributes;

 

import cn.luxh.app.entity.privilege.UserInfo;

import cn.luxh.app.service.privilege.UserService;

 

 

/**

 * User Controller

 * @author Luxh

 */

 

@Controller

@RequestMapping(value="/user")

public class UserController {

   

    private static final Log LOG = LogFactory.getLog(UserController.class);

   

   

    @Autowired

    private UserService userService;//注入业务接口

   

    /**

     * 用户列表

     */

    @RequestMapping(value="/userList.do")

    public String userList(ModelMap modelMap) {

        LOG.info("访问用户列表");

        //打印一句话测试,不查数据库了

        return "user/userList"; //根据SpringMVC配置文件配好的前缀和后缀,自动转为:/WEB-INF/jsp/user/userList.jsp

    }

   

    /**

     * 根据主键查找用户

     */

    @RequestMapping(value="/getUserById.do")

    public String getUserById(@RequestParam long id) {

        LOG.info("id is :"+id);

        UserInfo userInfo = userService.getById(UserInfo.class,id);

        LOG.info("user‘s name is :"+userInfo.getName());

        return "user/userList";

    }

   

    /**

     * 保存用户

     */

    @RequestMapping(value="/saveUser.do")

    public String saveUser(UserInfo userInfo,RedirectAttributes redirectAttributes) {

        LOG.info("保存用户");

        userService.save(userInfo);

        //重定向后的提示信息,使用RedirectAttributes传递,在JSP页面可以用${message}获取

        //提示信息只出现一次,刷新也不会重复提示,

        redirectAttributes.addFlashAttribute("message", "操作成功");

       

        //重定向,防止表单重复提交

        return "redirect:userList.do";//相对于当前路径 

        //return "redirect:/user/userList.do";//相对于当前项目根路径

    }

   

 

}

 

spring+springMVC+JPA配置详解(使用缓存框架ehcache)

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原文地址:http://www.cnblogs.com/kms1989/p/5524306.html

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