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:
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Spring公共配置
org.hibernate.cfg.ImprovedNamingStrategy
true
update
定义实体类：User.java
Java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
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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@PersistenceContext
Java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
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<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
Insert title here
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:
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<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
Insert title here
${user.username },你好！
http://ll-feng.iteye.com/blog/1908511