最近应公司要求，用了2天时间学了springmvc的搭建，就简单总结一下：
springmvc和struts2的比较，因为我是学过struts的，它们都是基于mvc模式而设计的web层框架
它们最大的区别：
1、入口
spring mvc的入口是servlet，而struts2是filter
（这里要指出，filter和servlet是不同的。以前认为filter是servlet的一种特殊），
这样就导致了二者的机制不同，这里就牵涉到servlet和filter的区别了。
2、主要机制
springmvc是方法级别的拦截，一个方法对应一个request上下文，而方法同时又跟一个url对应,参数的传递是直接注入到方法中的，是该方法独有的。
struts2是类级别的拦截， 一个类对应一个request上下文， struts是在接受参数的时候，可以用属性来接受参数， 这就说明参数是让多个方法共享的,
这也就无法用注解或其他方式标识所属方法了
intercepter的实现机制。struts有以自己的interceptor机制，spring mvc 用的是独立的AOP方式。这样导致struts的配置文件量还是比spring mvc大，
虽然struts的配置能继承，spring mvc使用更加简洁。
springmvc环境的搭建：
建立一个web项目：
首先在目录/WEB-INF/web.xml配置如下内容：
<?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">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- 配置前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 服务器开启的时候，SpringMVC也开启 -->
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<!-- mvc的名称可以随便取, 这样前台可以通过 /项目名/mvc/控制器指定的name名称访问 -->
<url-pattern>/mvc/*</url-pattern>
</servlet-mapping>
</web-app>
然后还是/WEB-INF/springmvc-servlet.xml(注：该文件名是[servletname]-servlet.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<!-- 配置controller，由spring来管理controller，前台通过name指定的值来获取访问相应的controller，
因为ID不支持，后面action要和servlet中配置的后置相同 -->
<bean class="com.controller.UserController" name="/list.action"></bean>
<!-- 配置框架提供的视图解析器，通过配置前缀和后缀规则来解析,ModelAndView -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
</beans>
Controller层
/**
* 基于注解的SpringMVC+Hibernate3.6的CRUD
* @author Saiteam
*
*/
@Controller
public class UserController { private UserDaoImpl userDao=new UserDaoImpl(); @RequestMapping(value="/list.action")
public String list(HttpServletRequest request){
List<User> user = userDao.list();
request.setAttribute("users", user);
return "list";
}
@RequestMapping(value="/saveForward.action")
public String saveForward(HttpServletRequest request){
return "add";
}
@RequestMapping(value="/add.action")
public String add(HttpServletRequest request) throws Exception{
request.setCharacterEncoding("UTF-8");
User user = new User();
user.setName(request.getParameter("name"));
user.setPassword(request.getParameter("password"));
user.setSex(request.getParameter("sex"));
user.setAddress(request.getParameter("address"));
user.setPhone(request.getParameter("phone"));
user.setEmail(request.getParameter("email"));
userDao.save(user);
request.setAttribute("users", userDao.list());
return "list";
} @RequestMapping(value="/delete.action")
public String delete(HttpServletRequest request){
int id = Integer.parseInt(request.getParameter("id"));
userDao.delete(id);
request.setAttribute("users", userDao.list());
return "list";
} @RequestMapping(value="/update.action")
public String update(HttpServletRequest request) throws Exception{
request.setCharacterEncoding("UTF-8");
User user = new User();
user.setId(Integer.parseInt(request.getParameter("id")));
user.setName(request.getParameter("name"));
user.setPassword(request.getParameter("password"));
user.setSex(request.getParameter("sex"));
user.setAddress(request.getParameter("address"));
user.setPhone(request.getParameter("phone"));
user.setEmail(request.getParameter("email"));
userDao.update(user);
request.setAttribute("users", userDao.list());
return "list";
} @RequestMapping(value="/get.action")
public String get(HttpServletRequest request){
int id = Integer.parseInt(request.getParameter("id"));
request.setAttribute("user", userDao.get(id));
return "update";
}
/**
* 登陆功能
* @param request
* @return
* @throws Exception
*/
@RequestMapping(value="login.action")
public String login(HttpServletRequest request) throws Exception{
request.setCharacterEncoding("UTF-8");
String name = request.getParameter("name");
String password = request.getParameter("password"); //测试
System.out.println("-------name-----------"+name);
System.out.println("-------password-----------"+password); if(name != null && !name.equals("")){
if(password != null && !password.equals("")){
User model = userDao.login(name, password);
//测试
System.out.println("-------------model--------"+model); if(model != null && !model.equals("")){
request.setAttribute("users", userDao.list());
return "list";
}else{
request.setAttribute("error", "用户或密码错误！");
return "forward:/login.jsp";
}
}else{
request.setAttribute("error", "密码不能为空！");
return "forward:/login.jsp";
}
}else{
request.setAttribute("error", "用户名不能为空！");
return "forward:/login.jsp";
} } //实现注册功能
@RequestMapping(value="register.action")
public String register(HttpServletRequest request) throws Exception{
request.setCharacterEncoding("UTF-8");
User user = new User();
user.setName(request.getParameter("name"));
user.setPassword(request.getParameter("password"));
user.setSex(request.getParameter("sex"));
user.setAddress(request.getParameter("address"));
user.setPhone(request.getParameter("phone"));
user.setEmail(request.getParameter("email"));
userDao.save(user);
return "forward:/index.jsp";
} /**
* 跳转到登陆页面
* @param request
* @return
*/
@RequestMapping(value="loginForward.action")
public String loginForwad(HttpServletRequest request){
return "forward:/login.jsp";
}
/**
* 转发到注册页面
* @param request
* @return
*/
@RequestMapping(value="rgf.action")
public String registerForwad(HttpServletRequest request){
return "forward:/register.jsp";
} }
service层
public class UserDaoImpl implements UserDao {
public void save(User user) {
Session session = HibernateSessionFactory.getSession();
Transaction tx = session.getTransaction();
try {
tx.begin();
session.save(user);
tx.commit();
} catch (HibernateException e) {
if (tx != null) { // 如果存在事务，则回滚
tx.rollback();
}
throw e; // 抛出异常
} finally {
if (session != null) // 如果session存在，则关闭
session.close();
}
}
public void delete(int id) {
Session session = HibernateSessionFactory.getSession();
String hql = "DELETE User u WHERE u.id=:id";
session.createQuery(hql).setInteger("id", id).executeUpdate();
}
public void update(User user){
Session session = HibernateSessionFactory.getSession();
Transaction tx = session.getTransaction();
try {
tx.begin();
session.update(user);
tx.commit();
} catch (HibernateException e) {
if (tx != null) { // 如果存在事务，则回滚
tx.rollback();
}
throw e; // 抛出异常
} finally {
if (session != null) // 如果session存在，则关闭
session.close();
}
}
public User get(int id) {
Session session = HibernateSessionFactory.getSession();
try {
User user = (User) session.get(User.class, id);
return user;
} finally {
if (session != null) {
session.close();
}
}
}
public List<User> list(){
Session session = HibernateSessionFactory.getSession();
String hql = "FROM User";
return session.createQuery(hql).list();
}
//登陆功能
public User login(String name,String password){
Session session = HibernateSessionFactory.getSession();
String hql = "FROM User u WHERE u.name=:name AND u.password=:password";
return (User) session.createQuery(hql).setString("name", name).setString("password", password).uniqueResult();
}
}
jsp页面自己写