一、首先通过maven加入spring、jpa和hibernate相关的jar包。如pom.xml:Java代码  收藏代码    
            
      
       4.0.0
             
      
        cn.ibeans
             
      
       ibeans
             
      
       war
             
      
       0.0.1-SNAPSHOT
             
      
       myweb Maven Webapp
             
      
       http://maven.apache.org
                                
             
               
       
        1.6
                
       
        4.11
                
       
        3.2.2.RELEASE
              
                                
             
               
                
                    
        
         org.springframework
                     
        
         spring-core
                     
        
         ${spring-version}
                 
                
                    
        
         org.springframework
                     
        
         spring-beans
                     
        
         ${spring-version}
                 
                
                    
        
         org.springframework
                     
        
         spring-web
                     
        
         ${spring-version}
                 
                
                    
        
         org.springframework
                     
        
         spring-webmvc
                     
        
         ${spring-version}
                 
                
                    
        
         org.springframework
                     
        
         spring-context
                     
        
         ${spring-version}
                 
                
                    
        
         org.springframework.data
                     
        
         spring-data-jpa
                     
        
         1.3.2.RELEASE
                 
                
                                                          
                
                    
        
         javax.servlet
                     
        
         servlet-api
                     
        
         3.0-alpha-1
                     
        
         provided
                 
                
                                                          
                
                    
        
         junit
                     
        
         junit
                     
        
         ${junit-version}
                     
        
         test
                 
                
                                                          
                
                    
        
         org.hibernate
                     
        
         hibernate-core
                     
        
         4.2.1.Final
                 
                    
                    
        
         org.hibernate
                     
        
         hibernate-entitymanager
                     
        
         4.2.1.Final
                 
                
                    
        
         org.hibernate.common
                     
        
         hibernate-commons-annotations
                     
        
         4.0.1.Final
                 
                
                    
        
         org.hibernate
                     
        
         hibernate-validator
                     
        
         5.0.0.Final
                 
                
                                                          
                
                    
        
         org.slf4j
                     
        
         slf4j-api
                     
        
         1.7.5
                 
                
                    
        
         org.slf4j
                     
        
         jcl-over-slf4j
                     
        
         1.7.5
                 
                
                    
        
         org.slf4j
                     
        
         slf4j-log4j12
                     
        
         1.7.5
                 
                
                                                          
                
                    
        
         mysql
                     
        
         mysql-connector-java
                     
        
         5.1.25
                 
                
                                                          
                
                    
        
         commons-dbcp
                     
        
         commons-dbcp
                     
        
         20030825.184428
                 
                
                    
        
         commons-pool
                     
        
         commons-pool
                     
        
         20030825.183949
                 
                
                    
        
         commons-collections
                     
        
         commons-collections
                     
        
         2.1
                 
                
              
                                
             
               
       
        ibeans
              
           
      2、配置applicationContext.xml中的实体管理工厂和事务机制:Java代码  收藏代码    
          
                               
      
       Spring公共配置 
                                
               
                   
                
                                
               
                    
                    
                    
       
                    
                        
                             
         
          org.hibernate.cfg.ImprovedNamingStrategy
                              
         
          true
                              
         
          update
                          
                     
                
                                    
               
                   
                
                                    
               
                   
                
                                    
               
               
               
                                
               
                                    
               
                   
                                               
                    
                        
                         
                         
                         
                         
                                                  
                         
                         
                         
                         
                         
                         
                     
                                             
                    
                
                                    
               
                   
                                       
                    
                        
                         
                         
                         
                         
                     
                
                                    
               
                   
                                              
                    
                        
                         
                         
                         
                     
                                     
                    
                        
                         
                     
                
           
      定义实体类：User.javaJava代码  收藏代码    package cn.ibeans.web.model;                      import java.io.Serializable;                      import javax.persistence.Column;     import javax.persistence.Entity;     import javax.persistence.GeneratedValue;     import javax.persistence.Id;     import javax.persistence.Table;                      import org.hibernate.annotations.GenericGenerator;                      @Entity     @Table(name="i_user")     public class User implements Serializable{         private String id;         private String username;         private String password;                              @Id         @GeneratedValue(generator="system-uuid")         @GenericGenerator(name="system-uuid",strategy="uuid")         public String getId() {             return id;         }         public void setId(String id) {             this.id = id;         }                              @Column(name="username")         public String getUsername() {             return username;         }         public void setUsername(String username) {             this.username = username;         }                              @Column(name="password")         public String getPassword() {             return password;         }         public void setPassword(String password) {             this.password = password;         }                          } 3、定义dao接口，只需定义接口方法即可，不用加任何注解Java代码  收藏代码    package cn.ibeans.dao;                      import cn.ibeans.web.model.User;                      public interface UserDao {                          User findByName(String name);                          User findByLoginName(String loginName);                              void saveOrUpdate(User user);     } 4、定义dao实现类。用@Repository注解类，并将EntityManager作为成员变量注入，注入方法是加@PersistenceContextJava代码  收藏代码    package cn.ibeans.dao.impl;                      import javax.persistence.EntityManager;     import javax.persistence.PersistenceContext;                      import org.springframework.stereotype.Repository;                      import cn.ibeans.dao.UserDao;     import cn.ibeans.web.model.User;                      @Repository     public class UserDaoImpl implements UserDao {                              @PersistenceContext         private EntityManager em;                          @Override         public User findByName(String name) {             return null;         }                          @Override         public User findByLoginName(String loginName) {             return null;         }                          @Override         public void saveOrUpdate(User user) {             em.persist(user);         }                      } 5、定义service类。可直接写实现类用@Component或@Service注释类，将dao接口作为成员变量注入，注入方法是加@Autowired如果是写方法，需在方法上加@Transactional(readOnly=false)注解Java代码  收藏代码    package cn.ibeans.service;                      import javax.annotation.Resource;                      import org.apache.log4j.Logger;     import org.springframework.beans.factory.annotation.Autowired;     import org.springframework.stereotype.Component;     import org.springframework.transaction.annotation.Transactional;                      import cn.ibeans.dao.UserDao;     import cn.ibeans.web.model.User;                      @Component     public class UserService {         private static Logger logger = Logger.getLogger(UserService.class);         @Autowired         private UserDao userDao;                              @Transactional(readOnly=false)         public void saveUser(User user){             userDao.saveOrUpdate(user);             logger.debug(user.getUsername()+",保存成功！");         }     } 6、定义action用@Controller注释action类，如果需为该action中所有方法指定一个共用的上层路径名，则需用@RequestMapping(value="/user")注释该类。表示该类下的所有访求均要通过/user/**来访问将service类作为成员变量注入action。注入方法是加@Autowired用@RequestMapping(value="/save")注释action的方法。Java代码  收藏代码    package cn.ibeans.web.controller;                      import javax.servlet.ServletContext;     import javax.servlet.http.HttpServlet;                      import org.apache.log4j.Logger;     import org.springframework.beans.factory.annotation.Autowired;     import org.springframework.stereotype.Controller;     import org.springframework.ui.Model;     import org.springframework.web.bind.annotation.ModelAttribute;     import org.springframework.web.bind.annotation.RequestMapping;     import org.springframework.web.context.ContextLoader;     import org.springframework.web.context.WebApplicationContext;                      import cn.ibeans.service.UserService;     import cn.ibeans.web.model.User;                      @Controller     @RequestMapping(value="/user")     public class LoginController extends HttpServlet{         private static Logger log = Logger.getLogger(LoginController.class);                              @Autowired         private UserService userService;                                               //@RequestMapping(value="/login")   //如果类级别上已有映射地址（/user），此处的完整请求地址是/user/login         public String doLogin(Model model,Object loginForm){             //model.addAttribute("username",username);  //model被用来封装数据，向前台传递             WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext();             ServletContext sc = context.getServletContext();                                      return "/welcome";         }                              @RequestMapping(value="/login")         public String login(@ModelAttribute User user,Model model){             log.info(user.getUsername());             model.addAttribute(user);             return "/welcome";         }                              @RequestMapping(value="/save")         public String save(@ModelAttribute User user,Model model){             log.info(user.getUsername());             userService.saveUser(user);             model.addAttribute(user);             return "/welcome";         }     } 7、发起请示的页面请示的url应该是上下文根路径+action类路径+方法路径Java代码  收藏代码    <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>                        
                                 
     
              
      
                  
                         
                         
                     
      
          
     
             8、转发目的页面可以通过引用action方法里定义的mode属性来获取相关的数据。welcome.jsp:Java代码  收藏代码    <%@ page language="java" contentType="text/html; charset=utf-8"         pageEncoding="utf-8"%>                    
                            ${user.username },你好！           

http://ll-feng.iteye.com/blog/1908511