Spring+SpringMVC+JPA

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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">
    
    
    <context-param>
          <param-name>webAppRootKeyparam-name>
          <param-value>spring_springmvc_jpa.rootparam-value>
    context-param>
    <context-param>
          <param-name>log4jConfigLocationparam-name>
          <param-value>classpath:log4j.propertiesparam-value>
    context-param>
    <listener>
          <listener-class>org.springframework.web.util.Log4jConfigListenerlistener-class>
    listener>
    
    
    <filter>
          <filter-name>characterEncodingFilterfilter-name>
          <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
          <init-param>
                <param-name>encodingparam-name>
                <param-value>UTF-8param-value>
          init-param>
    filter>
    <filter-mapping>
          <filter-name>characterEncodingFilterfilter-name>
          <url-pattern>/*url-pattern>
    filter-mapping>
    
    
    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        listener-class>
    listener>
    <context-param>
        <param-name>contextConfigLocationparam-name>
        <param-value>/WEB-INF/applicationContext.xmlparam-value>
    context-param>

    
    <listener>
        <listener-class>
            org.springframework.web.util.IntrospectorCleanupListener
        listener-class>
    listener>

    
    
    <servlet> 
          <servlet-name>dispatcherServletservlet-name> 
          <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class> 
          <init-param> 
                  <param-name>contextConfigLocationparam-name> 
                  <param-value>/WEB-INF/dispatcher-servlet.xmlparam-value> 
          init-param> 
          <load-on-startup>1load-on-startup> 
     servlet> 
     
     <servlet-mapping> 
             <servlet-name>dispatcherServletservlet-name> 
             <url-pattern>*.dourl-pattern> 
     servlet-mapping> 

    
  <welcome-file-list>
    <welcome-file>index.jspwelcome-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="E:/CacheTmpDir" />

   
   
  <defaultCache maxElementsInMemory="10000"
                    eternal="false"
                    timeToIdleSeconds="120" 
                    timeToLiveSeconds="120" 
                    overflowToDisk="true"
                    maxElementsOnDisk="10000000" 
                    diskPersistent="false"
                    diskExpiryThreadIntervalSeconds="120" 
                    memoryStoreEvictionPolicy="LRU" />
                    
    
    <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&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">

    

        
        
        <context:annotation-config />
        
        
        <context:component-scan base-package="cn.luxh.app">
            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>  
        context:component-scan> 
    
        
        <context:property-placeholder location="classpath:jdbc.properties" /> 
        
        
        <bean id="dataSource" class="com.jolbox.bonecp.BoneCPDataSource" destroy-method="close">
            
            <property name="driverClass" value="${jdbc.driverClassName}" />
            
            <property name="jdbcUrl" value="${jdbc.url}" />
            
            <property name="username" value="${jdbc.username}" />
            
            <property name="password" value="${jdbc.password}" />
            
            <property name="idleConnectionTestPeriod" value="${BoneCP.idleConnectionTestPeriod}" />
            
            <property name="idleMaxAge" value="${BoneCP.idleMaxAge}" />
            
            <property name="maxConnectionsPerPartition" value="${BoneCP.maxConnectionsPerPartition}" />
            
            <property name="minConnectionsPerPartition" value="${BoneCP.minConnectionsPerPartition}" />
            
            <property name="partitionCount" value="${BoneCP.partitionCount}" />
            
            <property name="acquireIncrement" value="${BoneCP.acquireIncrement}" />
            
            <property name="statementsCacheSize" value="${BoneCP.statementsCacheSize}" />
            
            <property name="releaseHelperThreads" value="${BoneCP.releaseHelperThreads}" />
       bean>
       
     
    <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.MySQL5Dialectprop>
             <prop key="hibernate.connection.driver_class">com.mysql.jdbc.Driverprop>
             <prop key="hibernate.max_fetch_depth">3prop>
             <prop key="hibernate.jdbc.fetch_size">18prop>
             <prop key="hibernate.jdbc.batch_size">10prop>
             <prop key="hibernate.hbm2ddl.auto">updateprop>
             <prop key="hibernate.show_sql">trueprop>
             <prop key="hibernate.format_sql">trueprop>
             <prop key="javax.persistence.validation.mode">noneprop>
            props>
           property>
       bean>
       
       <bean id="persistenceProvider" class="org.hibernate.ejb.HibernatePersistence"/>
       
       <bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">  
     <property name="database" value="MYSQL"/>  
    bean>  
    
    <bean id="jpaDialect" class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>  
              
         
       <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager">  
           <property name="entityManagerFactory" ref="entityManagerFactory" />  
       bean> 
        
        
       <tx:annotation-driven transaction-manager="txManager"/>
       
        
         
     
       
           
       <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 
     * @param clazz  实体类
     * @param id     主键
     * @return
     */
     T getById(Class 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 getById(Class 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 
     * @param clazz 实体类
     * @param id    主键
     * @return
     */
     T getById(Class 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 getById(Class 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
    }
    

}

　　　

　　　　　　访问用户列表就是：http://localhost:8080/APP/user/userList.do

　　　　　　根据主键查找用户：http://localhost:8080/APP/user/getUserById.do?id=1

　　　　　　保存用户：http://localhost:8080/APP/user/saveUser.do

　　　　　　APP是我的应用名称。

　

 

 

分类:  SpringMVC,  框架整合,  Spring