【maven + hibernate(注解) +spring +springMVC】 使用maven搭建项目

研究，百度，查资料+好友帮助，使用MyEcplise2015工具，通过maven搭建hibernate+springMVC+spring的项目，数据库采用MySql5.5 不过使用的版本会在项目搭建过程中介绍。

大概就是下面的几个步骤：

1. 设计数据库，得到数据库

2.使用maven搭建项目，导入包的依赖

3.引入spring的配置信息，放在资源文件中

4.引入Log4j日志文件配置

5.配置hibernate

6.配置ehcache.xml

7.使用hibernate  tools生成实体

8.创建Dao层、service层

9.配置spring-mvc.xml

10.配置web.xml容器

11.创建Controller层

12.创建view层

13.打包，部署，运行项目

1.设计数据库，并创建数据库

1.1 使用powerDesigner,设计数据表，生成cdm

设计三个数据表分别为角色表，权限表以及用户表，三张表之间分别是多对多的关系。三个实体的主键均使用UUID，因此设计主键长度为varchar(36)

1.2 继续生成pdm

由于三张表之间是多对多，生成两张中间表，分别是角色权限表和用户角色表

这个怎么用就不介绍了，总而言之，最后生成SQL语句，然后在MySQL运行，创建一个新的数据库，生成如下的数据库：

2.创建maven项目，导入项目所需依赖架包

2.1创建maven项目

新创建成的maven项目结构如下，我们将这个项目结构完善

首先将这个项目转化为web项目，项目右键-->properties，在设置过程中，注意Web版本与jave版本的相互支持

项目转成web项目之后，会生成下面的这个目录

我们要做的就是把这个WebRoot目录下的东西放到src下的webapp下，让它符合maven项目的结构标准.然后，删除WebRoot目录即可。

2.2 调一下项目中的小错误

首先双击pom.xml文件，设置web版本

双击Inxde.jsp文件，发现没有httpservlet架包，那我们就进入build path，给项目添加所支持架包

既然改到这里了，我们的JRE版本太低了，把它替换成高的版本，顺便把J2EE的架包也搞进来，以备不时之需

搞进来J2EE的lib

搞进来JRE的lib

此时，小错误全部消除完成，现在的项目结构如下所示：

2.3 现在配置pom.xml。导入项目依赖架包

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.it</groupId>
   <artifactId>mySecond</artifactId>
   <version>0.0.1-SNAPSHOT</version>
   <packaging>war</packaging>
   <build>
       <plugins>
           <plugin>
               <artifactId>maven-war-plugin</artifactId>
               <configuration>
                   <version>3.0</version>
               </configuration>
           </plugin>
       </plugins>
   </build>

       <name>myAgen</name>
     <url>http://maven.apache.org</url>

     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <spring.version>4.1.4.RELEASE</spring.version>
         <hibernate.version>4.3.8.Final</hibernate.version>
         <jackson.version>2.5.0</jackson.version>

     </properties>

     <dependencies>

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

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

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

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

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

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

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

         <!-- 使用SpringMVC需配置 -->
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
             <version>${spring.version}</version>
         </dependency>
         <!-- spring  cglib 代理 -->
         <dependency>
             <groupId>cglib</groupId>
             <artifactId>cglib</artifactId>
             <version>2.2.2</version>
         </dependency>
         <!-- 关系型数据库整合时需配置 如hibernate jpa等 -->
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-orm</artifactId>
             <version>${spring.version}</version>
         </dependency>

         <!-- hibernate -->
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-core</artifactId>
             <version>${hibernate.version}</version>
         </dependency>

         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-ehcache</artifactId>
             <version>${hibernate.version}</version>
         </dependency>

         <!-- 二级缓存ehcache -->
         <dependency>
             <groupId>net.sf.ehcache</groupId>
             <artifactId>ehcache</artifactId>
             <version>2.9.0</version>
         </dependency>

         <!-- log4j -->
         <dependency>
             <groupId>log4j</groupId>
             <artifactId>log4j</artifactId>
             <version>1.2.17</version>
         </dependency>

         <!-- mysql连接 -->
         <dependency>
             <groupId>mysql</groupId>
             <artifactId>mysql-connector-java</artifactId>
             <version>5.1.34</version>
         </dependency>

         <!-- c3p0数据源 -->
         <dependency>
             <groupId>com.mchange</groupId>
             <artifactId>c3p0</artifactId>
             <version>0.9.5-pre10</version>
         </dependency>

         <!-- json -->
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
             <version>1.2.3</version>
         </dependency>

         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-annotations</artifactId>
             <version>${jackson.version}</version>
         </dependency>

         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-core</artifactId>
             <version>${jackson.version}</version>
         </dependency>

         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>

         <!-- aop -->
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjweaver</artifactId>
             <version>1.8.4</version>
         </dependency>

         <!-- servlet -->
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>servlet-api</artifactId>
             <version>3.0-alpha-1</version>
             <scope>provided</scope>
         </dependency>

         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>jstl</artifactId>
             <version>1.2</version>
         </dependency>

     </dependencies>
 </project>    

3.引入spring的配置信息，放在资源文件中

在路径下创建config.properties文件,这里面存放的就是一堆的变量，有关hibernate配置的变量

 #application configs

 #jdbc c3p0 config
 jdbc.driver = com.mysql.jdbc.Driver
 jdbc.url = jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=utf-8
 jdbc.username = root
 jdbc.password = root

 #hibernate config
 hibernate.dialect = org.hibernate.dialect.MySQLDialect
 hibernate.show_sql = true
 hibernate.format_sql = false
 hibernate.hbm2ddl.auto = update
 hibernate.cache.use_second_level_cache = true
 hibernate.cache.use_query_cache = true
 hibernate.cache.region.factory_class = org.hibernate.cache.ehcache.EhCacheRegionFactory
 hibernate.cache.provider_configuration_file_resource_path =ehcache.xml

4.引入Log4j日志文件配置

在下创建log4j.properties,

 ### set log levels ###
 log4j.rootLogger = INFO , C , D , E 

 ### console ###
 log4j.appender.C = org.apache.log4j.ConsoleAppender
 log4j.appender.C.Target = System.out
 log4j.appender.C.layout = org.apache.log4j.PatternLayout
 log4j.appender.C.layout.ConversionPattern = [springmvc_hibernate_demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

 ### log file ###
 log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
 log4j.appender.D.File = ../logs/springmvc_hibernate_demo.log
 log4j.appender.D.Append = true
 log4j.appender.D.Threshold = INFO
 log4j.appender.D.layout = org.apache.log4j.PatternLayout
 log4j.appender.D.layout.ConversionPattern = [springmvc_hibernate_demo][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

 ### exception ###
 log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
 log4j.appender.E.File = ../logs/springmvc_hibernate_demo_error.log
 log4j.appender.E.Append = true
 log4j.appender.E.Threshold = ERROR
 log4j.appender.E.layout = org.apache.log4j.PatternLayout
 log4j.appender.E.layout.ConversionPattern =[sspringmvc_hibernate_demo][%p] [%-d{yyyy-MM-dd HH\:mm\:ss}] %C.%M(%L) | %m%n

5.配置hibernate

在下创建spring-hibernate.xml，其中配置了数据源dataSource,配置sessionFactory，配置事务管理器。【如果需要连接多干服务器上的多个数据库，那就可以再多配一份同样的dataSource,sessionFacrory，事务管理器，在注入的时候，在Controller中，@Resource（注明是哪个sessionFactory即可）这里可能有误，之后再说】

 <?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:tx="http://www.springframework.org/schema/tx"
     xmlns:aop="http://www.springframework.org/schema/aop"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd
         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">

     <!-- 自动扫描@Controller注入为bean -->
     <context:property-placeholder location="classpath:config.properties"/>

     <!-- 配置数据源 c3p0 -->
     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"
         destroy-method="close">
         <property name="driverClass" value="${jdbc.driver}" />
         <property name="jdbcUrl" value="${jdbc.url}" />
         <property name="user" value="${jdbc.username}" />
         <property name="password" value="${jdbc.password}" />

         <!-- 请求超时时间 -->
         <property name="checkoutTimeout" value="30000" />
         <!-- 每60秒检查所有连接池中的空闲连接。默认值: 0，不检查 -->
         <property name="idleConnectionTestPeriod" value="30" />
         <!-- 连接数据库连接池最大空闲时间 -->
         <property name="maxIdleTime" value="30" />
         <!-- 连接池初始化连接数 -->
         <property name="initialPoolSize" value="5" />
         <property name="minPoolSize" value="5" />
         <property name="maxPoolSize" value="20" />
         <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。默认值: 3 -->
         <property name="acquireIncrement" value="5" />
     </bean>

     <!-- 配置hibernate的SessionFactory -->
     <bean id="sessionFactory"
         class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
         <!-- 注入数据源 相关信息看源码 -->
         <property name="dataSource" ref="dataSource" />
         <!-- hibernate配置信息 -->
         <property name="hibernateProperties">
             <props>
                 <prop key="hibernate.dialect">${hibernate.dialect}</prop>
                 <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
                 <prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
                 <prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>

                 <!-- 开启二级缓存 ehcache -->
                 <prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>
                 <prop key="hibernate.cache.use_query_cache">${hibernate.cache.use_query_cache}</prop>
                 <prop key="hibernate.cache.region.factory_class">${hibernate.cache.region.factory_class}</prop>
                 <prop key="hibernate.cache.provider_configuration_file_resource_path">${hibernate.cache.provider_configuration_file_resource_path}
                 </prop>
             </props>
         </property>
         <!-- 扫描hibernate注解配置的entity -->
         <property name="packagesToScan" value="com.it.entity" />
     </bean>

     <!-- 配置事务管理器 -->
     <bean id="transactionManager"
         class="org.springframework.orm.hibernate4.HibernateTransactionManager">
         <property name="sessionFactory" ref="sessionFactory" />
     </bean>

 </beans>

6.配置ehcache.xml

在下创建ehcache.xml，配置的二级缓存

 <?xml version="1.0" encoding="UTF-8"?>
 <ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../config/ehcache.xsd">
     <diskStore path="D:/ehcache" />
     <!-- DefaultCache setting. -->
      <defaultCache
             maxElementsInMemory="1000"
             eternal="false"
             timeToIdleSeconds="120"
             timeToLiveSeconds="120"
             maxElementsOnDisk="1000000"
             overflowToDisk="true"
             memoryStoreEvictionPolicy="LRU">

     </defaultCache>

     <!-- Special objects setting. -->

     <cache
          name="org.andy.work.entity.AcctUser"
          maxElementsInMemory="2"
          memoryStoreEvictionPolicy="LRU"
          eternal="true"
          diskPersistent="false"
          overflowToDisk="false"
          maxElementsOnDisk="1000000" /> 

 </ehcache>

7.使用hibernate  tools生成实体

在MyEcplise右上角，点击【如果没有，就点击MyEcplise Java Enterprise 左边的小图标】MyEcplise  Hibernate，进入

在这里，New一个新的连接。连接到指定的数据库上

编辑新的连接，下面的这些，必须完全一致，除了账号密码和驱动的路径，但是选择了驱动之后，Driver ClassName必须得是com.mysql.jdbc.Driver【如果是MySQL数据库的话】.

编辑完成之后可以Test Driver一下看看是否可以连接成功。

连接成功之后如下，我们就开始选择所有数据表，点击hibernate反转，生成entity

但是此刻发现我们要选择的folder中不能指定到我们的项目中，我们的项目没有被识别出来。

因此需要点击MyEcplise Jave Enterprise，回去设置我们的项目，让项目支持hibernate，或者说让项目变成hibernate项目

右键项目 --->properties--->Project Facets

完了之后会有两个自动生成的文件，看看是否需要留着，或者删除

然后再回到hibernate tools下面

这次就可以看到本项目了

因为要使用注解的形式，所以，按照下面的选择，

主键使用UUID,注意hibernate的版本的问题，需要注意选择的主键生成策略

包下生成的实体如下：

下面贴出来生成实体的代码：

Authority.java

 package com.it.entity;

 import java.util.HashSet;
 import java.util.Set;
 import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 import javax.persistence.ManyToMany;
 import javax.persistence.Table;
 import org.hibernate.annotations.GenericGenerator;

 /**
  * Authority entity. @author MyEclipse Persistence Tools
  */
 @Entity
 @Table(name = "authority", catalog = "testdb")
 public class Authority implements java.io.Serializable {

     // Fields

     private String authorityId;
     private String authorityName;
     private Set<Role> roles = new HashSet<Role>(0);

     // Constructors

     /** default constructor */
     public Authority() {
     }

     /** full constructor */
     public Authority(String authorityName, Set<Role> roles) {
         this.authorityName = authorityName;
         this.roles = roles;
     }

     // Property accessors
     @GenericGenerator(name = "generator", strategy = "uuid.hex")
     @Id
     @GeneratedValue(generator = "generator")
     @Column(name = "authorityId", unique = true, nullable = false, length = 36)
     public String getAuthorityId() {
         return this.authorityId;
     }

     public void setAuthorityId(String authorityId) {
         this.authorityId = authorityId;
     }

     @Column(name = "authorityName", length = 50)
     public String getAuthorityName() {
         return this.authorityName;
     }

     public void setAuthorityName(String authorityName) {
         this.authorityName = authorityName;
     }

     @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "authorities")
     public Set<Role> getRoles() {
         return this.roles;
     }

     public void setRoles(Set<Role> roles) {
         this.roles = roles;
     }

 }

Myuser.java

 package com.it.entity;

 import java.sql.Timestamp;
 import java.util.HashSet;
 import java.util.Set;
 import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 import javax.persistence.ManyToMany;
 import javax.persistence.Table;
 import org.hibernate.annotations.GenericGenerator;

 /**
  * Myuser entity. @author MyEclipse Persistence Tools
  */
 @Entity
 @Table(name = "myuser", catalog = "testdb")
 public class Myuser implements java.io.Serializable {

     // Fields

     private String myUserId;
     private String myUserName;
     private String myUserPhone;
     private Timestamp myUserTime;
     private Set<Role> roles = new HashSet<Role>(0);

     // Constructors

     /** default constructor */
     public Myuser() {
     }

     /** minimal constructor */
     public Myuser(Timestamp myUserTime) {
         this.myUserTime = myUserTime;
     }

     /** full constructor */
     public Myuser(String myUserName, String myUserPhone, Timestamp myUserTime,
             Set<Role> roles) {
         this.myUserName = myUserName;
         this.myUserPhone = myUserPhone;
         this.myUserTime = myUserTime;
         this.roles = roles;
     }

     // Property accessors
     @GenericGenerator(name = "generator", strategy = "uuid.hex")
     @Id
     @GeneratedValue(generator = "generator")
     @Column(name = "myUserId", unique = true, nullable = false, length = 36)
     public String getMyUserId() {
         return this.myUserId;
     }

     public void setMyUserId(String myUserId) {
         this.myUserId = myUserId;
     }

     @Column(name = "myUserName", length = 20)
     public String getMyUserName() {
         return this.myUserName;
     }

     public void setMyUserName(String myUserName) {
         this.myUserName = myUserName;
     }

     @Column(name = "myUserPhone", length = 11)
     public String getMyUserPhone() {
         return this.myUserPhone;
     }

     public void setMyUserPhone(String myUserPhone) {
         this.myUserPhone = myUserPhone;
     }

     @Column(name = "myUserTime", nullable = false, length = 19)
     public Timestamp getMyUserTime() {
         return this.myUserTime;
     }

     public void setMyUserTime(Timestamp myUserTime) {
         this.myUserTime = myUserTime;
     }

     @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "myusers")
     public Set<Role> getRoles() {
         return this.roles;
     }

     public void setRoles(Set<Role> roles) {
         this.roles = roles;
     }

 }

Role.java

 package com.it.entity;

 import java.util.HashSet;
 import java.util.Set;
 import javax.persistence.CascadeType;
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.JoinTable;
 import javax.persistence.ManyToMany;
 import javax.persistence.Table;
 import org.hibernate.annotations.GenericGenerator;

 /**
  * Role entity. @author MyEclipse Persistence Tools
  */
 @Entity
 @Table(name = "role", catalog = "testdb")
 public class Role implements java.io.Serializable {

     // Fields

     private String roleId;
     private String roleName;
     private Set<Myuser> myusers = new HashSet<Myuser>(0);
     private Set<Authority> authorities = new HashSet<Authority>(0);

     // Constructors

     /** default constructor */
     public Role() {
     }

     /** full constructor */
     public Role(String roleName, Set<Myuser> myusers, Set<Authority> authorities) {
         this.roleName = roleName;
         this.myusers = myusers;
         this.authorities = authorities;
     }

     // Property accessors
     @GenericGenerator(name = "generator", strategy = "uuid.hex")
     @Id
     @GeneratedValue(generator = "generator")
     @Column(name = "roleId", unique = true, nullable = false, length = 36)
     public String getRoleId() {
         return this.roleId;
     }

     public void setRoleId(String roleId) {
         this.roleId = roleId;
     }

     @Column(name = "roleName", length = 20)
     public String getRoleName() {
         return this.roleName;
     }

     public void setRoleName(String roleName) {
         this.roleName = roleName;
     }

     @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     @JoinTable(name = "userrole", catalog = "testdb", joinColumns = { @JoinColumn(name = "roleId", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "myUserId", nullable = false, updatable = false) })
     public Set<Myuser> getMyusers() {
         return this.myusers;
     }

     public void setMyusers(Set<Myuser> myusers) {
         this.myusers = myusers;
     }

     @ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
     @JoinTable(name = "roleauthor", catalog = "testdb", joinColumns = { @JoinColumn(name = "roleId", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "authorityId", nullable = false, updatable = false) })
     public Set<Authority> getAuthorities() {
         return this.authorities;
     }

     public void setAuthorities(Set<Authority> authorities) {
         this.authorities = authorities;
     }

 }

上面有几个需要注意的：

上面大多数都是Hibernate tools自动生成的，但是有几个需要手动添加：

1、如果这个实体使用二级缓存的话，需要添加@cache注解；

2、如果该实体里面还有集合元素（set， map，list），如果实体要采用二级缓存，那么这些集合元素必须也添加@cache注解。

3、@JsonIgnoreProperties注解是为了防止SpringMVC在json返回时产生循环输出使用，如果不配置的话就会出现json死循环（还有多对多，一对多的属性时）。

4、@JsonIgnore这个是在转换成json是忽略该属性，而@JsonIgnoreProperties(value={"acctUsers", "acctAuthorities"})则是忽略acctRoles里面的acctUsers和acctAuthorites属性。

8.创建Dao层、service层

8.1 创建Dao层，面向接口的思想创建

8.1.1  先要创建一个基础Dao

 package com.it.dao;

 import java.io.Serializable;
 import java.util.List;

 public interface GenericDao<T, PK extends Serializable> {

     T load(PK id);

     T get(PK id);

     List<T> findAll();

     void persist(T entity);

     PK save(T entity);

     void saveOrUpdate(T entity);

     void delete(PK id);

     void flush();
 }

8.1.2 再定义具体的接口,继承基础的Dao

 package com.it.dao;

 import com.it.entity.Myuser;

 /**
  * MyUser的Dao
  * @author Administrator
  *
  */
 public interface MyUserDao extends GenericDao<Myuser, String> {

 }

8.1.3 接着定义具体的DaoImpl的实现类

 package com.it.dao.Impl;

 import java.util.List;

 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Repository;

 import com.it.dao.MyUserDao;
 import com.it.entity.Myuser;

 @Repository("myUserDao")
 public class MyUserDaoImpl implements MyUserDao {

     @Autowired
     private SessionFactory sessionFactory;

     private Session getCurrentSession() {
         return this.sessionFactory.getCurrentSession();
     }

     public Myuser load(String id) {
         // TODO Auto-generated method stub
         return (Myuser) this.getCurrentSession().load(Myuser.class, id);
     }

     public Myuser get(String id) {
         // TODO Auto-generated method stub
         return (Myuser) this.getCurrentSession().get(Myuser.class, id);
     }

     public List<Myuser> findAll() {
         @SuppressWarnings("unchecked")
         List<Myuser> allUser = this.getCurrentSession().createQuery("from Myuser").list();
         return allUser;
     }

     public void persist(Myuser entity) {
         this.getCurrentSession().persist(entity);
     }

     /**
      * 可以选择手动控制事务的提交，也可以交给spring自动去提交
      */
     public String save(Myuser entity) {
         // TODO Auto-generated method stub
 //        Session session = sessionFactory.openSession();
 //        session.getTransaction().begin();
 //        session.;
 //        session.getTransaction().commit();
 //        session.flush();
 //        session.close();
         return (String) this.getCurrentSession().save(entity);
     }

     public void saveOrUpdate(Myuser entity) {
         // TODO Auto-generated method stub
          this.getCurrentSession().saveOrUpdate(entity);
     }

     public void delete(String id) {
         // TODO Auto-generated method stub
         Myuser myuser=this.load(id);
         this.getCurrentSession().delete(myuser);
     }

     public void flush() {
         this.getCurrentSession().flush();
     }

 }

8.2 创建service层，也是面向接口的思想创建

8.2.1 创建一个基础Service

 package com.it.service;

 import java.io.Serializable;
 import java.util.List;

 public interface GenericService<T, PK extends Serializable> {

     T load(PK id);

     T get(PK id);

     List<T> findAll();

     void persist(T entity);

     PK save(T entity);

     void saveOrUpdate(T entity);

     void delete(PK id);

     void flush();
 }

8.2.2 创建service继承基础的Service

 package com.it.service;

 import com.it.entity.Myuser;

 public interface MyUserService extends GenericService<Myuser, String> {

 }

8.2.3 创建serviceImpl

 package com.it.service.Impl;

 import java.util.List;

 import javax.annotation.Resource;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;

 import com.it.dao.MyUserDao;
 import com.it.entity.Myuser;
 import com.it.service.GenericService;
 import com.it.service.MyUserService;

 @Service("myUserService")
 @Transactional
 public class MyUserServiceImpl implements MyUserService {

     @Resource(name = "myUserDao")
     private MyUserDao myUserDao;

     public Myuser load(String id) {
         // TODO Auto-generated method stub
         return myUserDao.load(id);
     }

     public Myuser get(String id) {
         // TODO Auto-generated method stub
         return myUserDao.get(id);
     }

     public List<Myuser> findAll() {
         // TODO Auto-generated method stub
         return myUserDao.findAll();
     }

     public void persist(Myuser entity) {
         // TODO Auto-generated method stub
         myUserDao.persist(entity);
     }

     public String save(Myuser entity) {
         // TODO Auto-generated method stub
         return myUserDao.save(entity);
     }

     public void saveOrUpdate(Myuser entity) {
         // TODO Auto-generated method stub
         myUserDao.saveOrUpdate(entity);
     }

     public void delete(String id) {
         // TODO Auto-generated method stub
         myUserDao.delete(id);
     }

     public void flush() {
         // TODO Auto-generated method stub
         myUserDao.flush();
     }

 }

9.配置spring-mvc.xml

spring-mvc.xml中配置了自动扫描Controller层注解+视图解析器

 <?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:p="http://www.springframework.org/schema/p"
     xmlns:context="http://www.springframework.org/schema/context"
     xmlns:tx="http://www.springframework.org/schema/tx"
     xmlns:aop="http://www.springframework.org/schema/aop"
     xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.1.xsd
         http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd
         http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
         http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.1.xsd
         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">

     <!-- 自动扫描@Controller注入为bean -->
     <context:component-scan base-package="com.it" >

     </context:component-scan>
     <!-- 标明注解事务 -->
     <tx:annotation-driven transaction-manager="transactionManager" />

     <!-- 以下为SpringMVC配置 -->
     <mvc:annotation-driven>
         <!-- 返回json数据，@response使用 -->
         <mvc:message-converters register-defaults="true">
             <bean
                 class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
                 <property name="supportedMediaTypes">
                     <list>
                         <value>text/html;charset=UTF-8</value>
                         <value>application/json;charset=UTF-8</value>
                     </list>
                 </property>

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

     <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->
     <bean
         class="org.springframework.web.servlet.view.InternalResourceViewResolver">
         <property name="viewClass"
             value="org.springframework.web.servlet.view.JstlView" />
         <property name="prefix" value="/WEB-INF/views" />
         <property name="suffix" value=".jsp" />
     </bean>

     <!-- 下面设置配置事物以及事务管理，是一种事务的处理方式，还可以有另一种 就是不写下面这一大块，直接在service层添加@Transactional
     解释一下这两种的区别：
     1.@Transactional  在serviceImpl层使用这个注解，表示默认的事务都是propagation="REQUIRED"，这样不会有下面read-only这一项了，那么比如在查询的时候只要保证这个查询是在一个事务中，将结果查询出来，对这个对象进行修改，不用调用save等方法，事务会自动帮你进行持久化的操作，会将你这个操作保存在数据库中
     2.使用下面的这两个事务管理，可以自己配置什么方法什么操作【insert、get】，可以自己设置事务的类型，也可以设置read-only。设置了read-only的话，在从数据库中查询出一条记录，对对象进行更改，那就必须调用save或者update方法才能进行保存

      配置事务增强处理Bean，指定事务管理器   意思是这个id为transactionAdvice的事务(建议)，他的事务管理者是上面指定的id为transactionManager的事务管理器
     <tx:advice id="transactionAdvice" transaction-manager="transactionManager" >
         配置详细事务处理语义
         <tx:attributes>
             在指定的如下的这些操作发生时，例如insert插入数据发生时，事务类型的request ，而get等操作，事务类型是supports，并且是只读
             <tx:method name="insert*" propagation="REQUIRED" />
             <tx:method name="update*" propagation="REQUIRED" />
             <tx:method name="delete*" propagation="REQUIRED" />

             <tx:method name="get*" propagation="SUPPORTS" read-only="true" />
             <tx:method name="find*" propagation="SUPPORTS" read-only="true" />
             <tx:method name="select*" propagation="SUPPORTS" read-only="true" />
             <tx:method name="load*" propagation="SUPPORTS" read-only="true" />

             其他采用默认事务方式
             <tx:method name="*"  propagation="REQUIRED" />

         </tx:attributes>
     </tx:advice>

     Spring aop事务管理
     <aop:config proxy-target-class="true">
         配置切入点    指定这个aop:pointcut去引用上面规定的advice，也就是说规定下面的这个expression指定的路径下的service.impl下的所有的方法，都按照上面advice中的规定去执行，碰上什么操作，事务就是什么类型的，这就是事务管理器的好处了
         解释一下，为什么这个要指定在service层：因为在同一个事务中，可能要对多张表进行多个不同的操作，才是一个完整的逻辑，例如淘宝上买东西，你转账之后你的钱减少了，对方的钱应该增加了，这两个操作在一起才是一个完整的操作，而如果这两个操作不在一个事务中，也就是如果将事务的操作指定在Dao层【MVC的设计模式：Dao层就是对数据库进行最简单的增删改查操作，而service层是进行逻辑处理的，一个完整的逻辑处理就要涉及到多次操作】事务操作失败，发生回滚，那你的帐减少了，对方的帐并没有增加，这样就不美丽的，因此，将事务的管理，指定在了service层
         <aop:pointcut id="transactionPointcut"
             expression="execution(* com.it.service..*Impl.*(..))" />expression中表达式所指意思： 所有的文件下的 com.it.service开头的包，以Impl结尾的类下的所有的方法，都执行上面advice的规定
         指定在txAdvice切入点应用txAdvice事务增强处理
         <aop:advisor pointcut-ref="transactionPointcut"
             advice-ref="transactionAdvice" />
     </aop:config> -->

 </beans>

10.配置web.xml容器

 <?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">
 <!-- web容器是web项目的大脑 -->
 <!-- 在web.xml中，执行顺序是：1.先执行listener 2。再执行filter  3.最后执行servlet 这就是执行顺序
     就像spring-hibernate.xml文件是在执行Listener的时候加载的，那注意这几个配置文件在web.xml中的加载顺序，因为资源文件是在配置文件【xml文件】中加载的，肯定是先加载的资源文件【properties文件】，才能在配置文件中调用资源文件中的变量的值使用

  -->
     <display-name>springmvc_demo</display-name>
 <!-- web容器，首先需要引入spring，让spring管理各个框架，并将其注入为bean -->
 <!-- 这个相当于定一个 变量在web.xml中，在下面的listener  org.springframework.web.context.ContextLoaderListener中，加载这个spring-hibernate.xml文件 -->
     <context-param>
         <param-name>contextConfigLocation</param-name>
         <param-value>classpath:spring-hibernate.xml</param-value>
     </context-param>
 <!-- 配置控制层的filter信息 -->
     <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>
     </filter-mapping>

     <!-- openSessionInView配置 作用是延迟session关闭到view层 -->
     <filter>
         <filter-name>openSessionInViewFilter</filter-name>
         <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
         <init-param>
             <param-name>singleSession</param-name>
             <param-value>true</param-value>
         </init-param>
     </filter>

 <!-- 监听servletContext，启动contextConfigLocation中的spring配置信息 -->
     <listener>
         <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
     </listener>

     <!-- 防止spring内存溢出监听器   可用可不用-->
     <listener>
         <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
     </listener>

 <!-- 类似与servlet 需要在web.xml中都需要配置一样，spring的思想是让这些servlet【controller也是servlet】继承了一个基础的servlet，那就只需在web.xml中配置一个servlet即可。 -->
 <!-- 这个servlet和下面的servlet-mapping相配合使用，注明了所有的以.htmls结尾的请求都被截取到，去到servlet中去找相对应的方法 进行处理 -->
     <servlet>
         <description>spring mvc servlet</description>
         <servlet-name>rest</servlet-name>
         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
         <init-param>
             <param-name>contextConfigLocation</param-name>
             <!-- 此处配置的是SpringMVC的配置文件 -->
             <param-value>classpath:spring-mvc.xml</param-value>
         </init-param>
         <load-on-startup>1</load-on-startup>
     </servlet>
     <!-- 配置了springmvc拦截的url为以.hmls结尾的请求 -->
     <servlet-mapping>
         <servlet-name>rest</servlet-name>
         <url-pattern>*.htmls</url-pattern>
     </servlet-mapping>

     <filter-mapping>
         <filter-name>openSessionInViewFilter</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>

     <!-- 配置session超时时间，单位分钟 -->
     <session-config>
         <session-timeout>30</session-timeout>
     </session-config>
     <!-- 欢迎界面 默认的项目访问界面 -->
     <welcome-file-list>
         <welcome-file>/index.jsp</welcome-file>
     </welcome-file-list>
 </web-app>

11.创建Controller层

 

 package com.it.controller;

 import java.sql.Timestamp;
 import java.util.List;
 import java.util.UUID;

 import javax.annotation.Resource;

 import org.apache.log4j.Logger;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;

 import com.it.entity.Myuser;
 import com.it.service.MyUserService;

 @Controller
 @RequestMapping("/myuser")
 public class MyUserController {

     private static final Logger LOGGER = Logger.getLogger(MyUserController.class);

     @Resource( name = "myUserService")
     private MyUserService  myUserService;

     @RequestMapping("/saveOne")
     public String saveOne(){
         Myuser myuser = new Myuser();
         //myuser.setMyUserId(UUID.randomUUID().toString());
         myuser.setMyUserName("andy");
         myuser.setMyUserPhone("13823237878");
         myuser.setMyUserTime(Timestamp.valueOf("1995-09-15 12:12:12"));
         myUserService.save(myuser);
         return "/user/showInfo";
     }

     @RequestMapping("/showInfo/{userId}")
     public String showUserInfo(ModelMap model, @PathVariable String userId){
         LOGGER.info("查询用户:"+userId);
         Myuser myuser = myUserService.load(userId);
         model.addAttribute("userInfo", myuser);
         return "/user/showInfo";
     }

     @RequestMapping("/showInfos")
     public @ResponseBody List<Myuser> showAllUser(){
         LOGGER.info("查询所有用户");
         List<Myuser> list = myUserService.findAll();
         return list;
     }
 }

12.创建view视图层

在src/main/webapp/WEB-INF/views下 创建user/showInfo.jsp

 <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 <%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
 <%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>

 <%
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://"
             + request.getServerName() + ":" + request.getServerPort()
             + path + "/";
 %>
 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 <html>
 <head>
 <base href="<%=basePath%>" />
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <script type="text/javascript" src="js/jquery-1.9.1.min.js"></script>
 <title>用户信息展示</title>
 </head>
 <body>
     用户信息 昵称： ${userInfo.myUserName} 用户id：${userInfo.myUserId} 用户电话:${userInfo.myUserPhone } 注册时间：
     <fmt:formatDate value="${userInfo.myUserTime }" pattern="yyyy-MM-dd HH:mm:ss" />
     角色：[
     <c:forEach items="${ userInfo.roles}" var="role">
                         ${role.roleName }   权限[
                            <c:forEach items="${ role.authorities}" var="authority">
                              ${authority.authorityName }
                            </c:forEach> ]
                       </c:forEach>
     ]

     <br /> ajax显示全部用户信息：
     <div id="show_all_user"></div>
 </body>
 <script type="text/javascript">
     $.ajax({
         type : "get",
         url : "myuser/showInfos.htmls",
         dataType : "json",
         success : function(data) {
             $(data).each(
                     function(i, user) {
                         var p = "<p>昵称:" + user.myUserName + "    电话:"
                                 + user.myUserPhone + "    注册时间:"
                                 + user.myUserTime + "    id:" + user.myUserId +
                         "</p>";
                         $("#show_all_user").append(p);
                     });
         },
         async : true
     });
 </script>
 </html>

 13. 一切准备就绪，把项目部署到tomcat中，启动即可

可能你会说，那要这个view页面做什么？？因为参考别人的嘛 并且，这个页面比较值得钻研