转自：http://www.blogjava.net/pengo/archive/2010/11/28/339229.html
弃用了struts，用spring mvc框架做了几个项目，感觉都不错，而且使用了注解方式，可以省掉一大堆配置文件。本文主要介绍使用注解方式配置的spring mvc，之前写的spring3.0 mvc和rest小例子没有介绍到数据层的内容，现在这一篇补上。下面开始贴代码。
文中用的框架版本：spring 3,hibernate 3,没有的，自己上网下。
web.xml配置：
<?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"> 
<display-name>s3h3</display-name> 
<context-param> 
<param-name>contextConfigLocation</param-name> 
<param-value>classpath:applicationContext*.xml</param-value> 
</context-param> 
<listener> 
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
</listener> 
<servlet> 
<servlet-name>spring</servlet-name> 
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
<load-on-startup>1</load-on-startup> 
</servlet> 
<servlet-mapping> 
<servlet-name>spring</servlet-name> <!-- 这里在配成spring,下边也要写一个名为spring-servlet.xml的文件，主要用来配置它的controller --> 
<url-pattern>*.do</url-pattern> 
</servlet-mapping> 
<welcome-file-list> 
<welcome-file>index.jsp</welcome-file> 
</welcome-file-list> 
</web-app> 
spring-servlet,主要配置controller的信息
<?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:p="http://www.springframework.org/schema/p" 
xmlns:context="http://www.springframework.org/schema/context" 
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd 
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
<context:annotation-config /> 
<!-- 把标记了@Controller注解的类转换为bean --> 
<context:component-scan base-package="com.mvc.controller" /> 
<!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 --> 
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" /> 
<!-- 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" 
p:prefix="/WEB-INF/view/" p:suffix=".jsp" /> 
<bean id="multipartResolver" 
class="org.springframework.web.multipart.commons.CommonsMultipartResolver" 
p:defaultEncoding="utf-8" /> 
</beans> 
applicationContext.xml代码
<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" 
xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation=" 
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd 
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> 
<context:annotation-config /> 
<context:component-scan base-package="com.mvc" /> <!-- 自动扫描所有注解该路径 --> 
<context:property-placeholder location="classpath:/hibernate.properties" /> 
<bean id="sessionFactory" 
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
<property name="dataSource" ref="dataSource" /> 
<property name="hibernateProperties"> 
<props> 
<prop key="hibernate.dialect">${dataSource.dialect}</prop> 
<prop key="hibernate.hbm2ddl.auto">${dataSource.hbm2ddl.auto}</prop> 
<prop key="hibernate.hbm2ddl.auto">update</prop> 
</props> 
</property> 
<property name="packagesToScan"> 
<list> 
<value>com.mvc.entity</value><!-- 扫描实体类，也就是平时所说的model --> 
</list> 
</property> 
</bean> 
<bean id="transactionManager" 
class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
<property name="sessionFactory" ref="sessionFactory" /> 
<property name="dataSource" ref="dataSource" /> 
</bean> 
<bean id="dataSource" 
class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
<property name="driverClassName" value="${dataSource.driverClassName}" /> 
<property name="url" value="${dataSource.url}" /> 
<property name="username" value="${dataSource.username}" /> 
<property name="password" value="${dataSource.password}" /> 
</bean> 
<!-- Dao的实现 --> 
<bean id="entityDao" class="com.mvc.dao.EntityDaoImpl"> 
<property name="sessionFactory" ref="sessionFactory" /> 
</bean> 
<tx:annotation-driven transaction-manager="transactionManager" /> 
<tx:annotation-driven mode="aspectj"/> 
<aop:aspectj-autoproxy/> 
</beans> 
hibernate.properties数据库连接配置
dataSource.password=123 
dataSource.username=root 
dataSource.databaseName=test 
dataSource.driverClassName=com.mysql.jdbc.Driver 
dataSource.dialect=org.hibernate.dialect.MySQL5Dialect 
dataSource.serverName=localhost:3306 
dataSource.url=jdbc:mysql://localhost:3306/test 
dataSource.properties=user=${dataSource.username};databaseName=${dataSource.databaseName};serverName=${dataSource.serverName};password=${dataSource.password} 
dataSource.hbm2ddl.auto=update 
配置已经完成，下面开始例子
先在数据库建表，例子用的是mysql数据库
CREATE TABLE `test`.`student` ( 
`id` int(10) unsigned NOT NULL AUTO_INCREMENT, 
`name` varchar(45) NOT NULL, 
`psw` varchar(45) NOT NULL, 
PRIMARY KEY (`id`) 
) 
建好表后，生成实体类
package com.mvc.entity; 
import java.io.Serializable; 
import javax.persistence.Basic; 
import javax.persistence.Column; 
import javax.persistence.Entity; 
import javax.persistence.GeneratedValue; 
import javax.persistence.GenerationType; 
import javax.persistence.Id; 
import javax.persistence.Table; 
@Entity 
@Table(name = "student") 
public class Student implements Serializable { 
private static final long serialVersionUID = 1L; 
@Id 
@Basic(optional = false) 
@GeneratedValue(strategy = GenerationType.IDENTITY) 
@Column(name = "id", nullable = false) 
private Integer id; 
@Column(name = "name") 
private String user; 
@Column(name = "psw") 
private String psw; 
public Integer getId() { 
return id; 
} 
public void setId(Integer id) { 
this.id = id; 
} 
public String getUser() { 
return user; 
} 
public void setUser(String user) { 
this.user = user; 
} 
public String getPsw() { 
return psw; 
} 
public void setPsw(String psw) { 
this.psw = psw; 
} 
} 
Dao层实现
package com.mvc.dao; 
import java.util.List; 
public interface EntityDao { 
public List<Object> createQuery(final String queryString); 
public Object save(final Object model); 
public void update(final Object model); 
public void delete(final Object model); 
} 
package com.mvc.dao; 
import java.util.List; 
import org.hibernate.Query; 
import org.springframework.orm.hibernate3.HibernateCallback; 
import org.springframework.orm.hibernate3.support.HibernateDaoSupport; 
public class EntityDaoImpl extends HibernateDaoSupport implements EntityDao{ 
public List<Object> createQuery(final String queryString) { 
return (List<Object>) getHibernateTemplate().execute( 
new HibernateCallback<Object>() { 
public Object doInHibernate(org.hibernate.Session session) 
throws org.hibernate.HibernateException { 
Query query = session.createQuery(queryString); 
List<Object> rows = query.list(); 
return rows; 
} 
}); 
} 
public Object save(final Object model) { 
return getHibernateTemplate().execute( 
new HibernateCallback<Object>() { 
public Object doInHibernate(org.hibernate.Session session) 
throws org.hibernate.HibernateException { 
session.save(model); 
return null; 
} 
}); 
} 
public void update(final Object model) { 
getHibernateTemplate().execute(new HibernateCallback<Object>() { 
public Object doInHibernate(org.hibernate.Session session) 
throws org.hibernate.HibernateException { 
session.update(model); 
return null; 
} 
}); 
} 
public void delete(final Object model) { 
getHibernateTemplate().execute(new HibernateCallback<Object>() { 
public Object doInHibernate(org.hibernate.Session session) 
throws org.hibernate.HibernateException { 
session.delete(model); 
return null; 
} 
}); 
} 
} 
Dao在applicationContext.xml注入
<bean id="entityDao" class="com.mvc.dao.EntityDaoImpl"> 
<property name="sessionFactory" ref="sessionFactory" />
</bean>
Dao只有一个类的实现，直接供其它service层调用，如果你想更换为其它的Dao实现，也只需修改这里的配置就行了。
开始写view页面，WEB-INF/view下新建页面student.jsp，WEB-INF/view这路径是在spring-servlet.xml文件配置的，你可以配置成其它，也可以多个路径。student.jsp代码
<%@ page language="java" contentType="text/html; charset=UTF-8" 
pageEncoding="UTF-8"%> 
<%@ include file="/include/head.jsp"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<title>添加</title> 
<script language="javascript" src="<%=request.getContextPath()%><!-- 
/script/jquery.min.js"> 
// --></script> 
<style><!-- 
table{ border-collapse:collapse; } 
td{ border:1px solid #f00; } 
--></style><style mce_bogus="1">table{ border-collapse:collapse; } 
td{ border:1px solid #f00; }</style> 
<script type="text/javascript"><!-- 
function add(){ 
window.location.href="<%=request.getContextPath() %>/student.do?method=add"; 
} 
function del(id){ 
$.ajax( { 
type : "POST", 
url : "<%=request.getContextPath()%>/student.do?method=del&id=" + id, 
dataType: "json", 
success : function(data) { 
if(data.del == "true"){ 
alert("删除成功！"); 
$("#" + id).remove(); 
} 
else{ 
alert("删除失败！"); 
} 
}, 
error :function(){ 
alert("网络连接出错！"); 
} 
}); 
} 
// --></script> 
</head> 
<body> 
<input id="add" type="button" onclick="add()" value="添加"/> 
<table > 
<tr> 
<td>序号</td> 
<td>姓名</td> 
<td>密码</td> 
<td>操作</td> 
</tr> 
<c:forEach items="${list}" var="student"> 
<tr id="<c:out value="${student.id}"/>"> 
<td><c:out value="${student.id}"/></td> 
<td><c:out value="${student.user}"/></td> 
<td><c:out value="${student.psw}"/></td> 
<td> 
<input type="button" value="编辑"/> 
<input type="button" onclick="del('<c:out value="${student.id}"/>')" value="删除"/> 
</td> 
</tr> 
</c:forEach> 
</table> 
</body> 
</html> 
student_add.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" 
pageEncoding="UTF-8"%> 
<%@ include file="/include/head.jsp"%> 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<title>学生添加</title> 
<mce:script type="text/javascript"><!-- 
function turnback(){ 
window.location.href="<%=request.getContextPath() %>/student.do"; 
} 
// --></mce:script> 
</head> 
<body> 
<form method="post" action="<%=request.getContextPath() %>/student.do?method=save"> 
<div><c:out value="${addstate}"></c:out></div> 
<table> 
<tr><td>姓名</td><td><input id="user" name="user" type="text" /></td></tr> 
<tr><td>密码</td><td><input id="psw" name="psw" type="text" /></td></tr> 
<tr><td colSpan="2" align="center"><input type="submit" value="提交"/><input type="button" onclick="turnback()" value="返回" /> </td></tr> 
</table> 
</form> 
</body> 
</html> 
controller类实现，只需把注解写上，spring就会自动帮你找到相应的bean，相应的注解标记意义，不明白的，可以自己查下@Service，@Controller，@Entity等等的内容。
package com.mvc.controller; 
import java.util.List; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
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.RequestMethod; 
import org.springframework.web.bind.annotation.RequestParam; 
import org.springframework.web.servlet.ModelAndView; 
import com.mvc.entity.Student; 
import com.mvc.service.StudentService; 
@Controller 
@RequestMapping("/student.do") 
public class StudentController { 
protected final transient Log log = LogFactory 
.getLog(StudentController.class); 
@Autowired 
private StudentService studentService; 
public StudentController(){ 
} 
@RequestMapping 
public String load(ModelMap modelMap){ 
List<Object> list = studentService.getStudentList(); 
modelMap.put("list", list); 
return "student"; 
} 
@RequestMapping(params = "method=add") 
public String add(HttpServletRequest request, ModelMap modelMap) throws Exception{ 
return "student_add"; 
} 
@RequestMapping(params = "method=save") 
public String save(HttpServletRequest request, ModelMap modelMap){ 
String user = request.getParameter("user"); 
String psw = request.getParameter("psw"); 
Student st = new Student(); 
st.setUser(user); 
st.setPsw(psw); 
try{ 
studentService.save(st); 
modelMap.put("addstate", "添加成功"); 
} 
catch(Exception e){ 
log.error(e.getMessage()); 
modelMap.put("addstate", "添加失败"); 
} 
return "student_add"; 
} 
@RequestMapping(params = "method=del") 
public void del(@RequestParam("id") String id, HttpServletResponse response){ 
try{ 
Student st = new Student(); 
st.setId(Integer.valueOf(id)); 
studentService.delete(st); 
response.getWriter().print("{\"del\":\"true\"}"); 
} 
catch(Exception e){ 
log.error(e.getMessage()); 
e.printStackTrace(); 
} 
} 
} 
service类实现
package com.mvc.service; 
import java.util.List; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Service; 
import org.springframework.transaction.annotation.Transactional; 
import com.mvc.dao.EntityDao; 
import com.mvc.entity.Student; 
@Service 
public class StudentService { 
@Autowired 
private EntityDao entityDao; 
@Transactional 
public List<Object> getStudentList(){ 
StringBuffer sff = new StringBuffer(); 
sff.append("select a from ").append(Student.class.getSimpleName()).append(" a "); 
List<Object> list = entityDao.createQuery(sff.toString()); 
return list; 
} 
public void save(Student st){ 
entityDao.save(st); 
} 
public void delete(Object obj){ 
entityDao.delete(obj); 
} 
}