轉自：http://www.blogjava.net/pengo/archive/2010/11/28/339229.html

棄用了struts，用spring mvc框架做了幾個項目，感覺都不錯，而且使用了注解方式，可以省掉一大堆配置文件。本文主要介紹使用注解方式配置的spring mvc，之前寫的spring3.0 mvc和rest小例子沒有介紹到數據層的內容，現在這一篇補上。下面開始貼代碼。

文中用的框架版本：spring 3,hibernate 3,沒有的，自己上網下。

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>??<!--?這里在配成spring,下邊也要寫一個名為spring-servlet.xml的文件，主要用來配置它的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?/>???
???????<!--把標記了@Controller注解的類轉換為bean?-->?????
??????<context:component-scan?base-package="com.mvc.controller"/>?????
??<!--啟動Spring?MVC的注解功能，完成請求和注解POJO的映射?-->?????
??????<bean?class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>?????
????????
???????<!--對模型視圖名稱的解析，即在模型視圖名稱添加前后綴?-->?????
???????<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代碼

<?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"/>??<!--自動掃描所有注解該路徑?-->???
??
?<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><!--掃描實體類，也就是平時所說的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的實現?-->???
?<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數據庫連接配置

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??

?

配置已經完成，下面開始例子
先在數據庫建表，例子用的是mysql數據庫

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，生成實體類

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層實現

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只有一個類的實現，直接供其它service層調用，如果你想更換為其它的Dao實現，也只需修改這里的配置就行了。
開始寫view頁面，WEB-INF/view下新建頁面student.jsp，WEB-INF/view這路徑是在spring-servlet.xml文件配置的，你可以配置成其它，也可以多個路徑。student.jsp代碼

<%@?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){???
$.ajax(?{???
????type?:?"POST",???
????url?:?"<%=request.getContextPath()%>/student.do?method=del&id="?+?id,???
????dataType:?"json",???
????success?:?function(data)?{???
????????if(data.del?==?"true"){???
????????????alert("刪除成功！");???
????????????$("#"?+?id).remove();???
????????}???
????????else{???
????????????alert("刪除失敗！");???
????????}???
????},???
????error?:function(){???
????????alert("網絡連接出錯！");???
????}???
});???
}???
//?--></script>??
</head>??
<body>??
??
<input?id="add"?type="button"?onclick="add()"?value="添加"/>??
<table?>??
????<tr>??
????????<td>序號</td>??
????????<td>姓名</td>??
????????<td>密碼</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="${student.psw}"/></td>??
????????<td>??
????????????<input?type="button"?value="編輯"/>????????
????????????<input?type="button"?onclick="del('<c:out?value="${student.id}"/>')"?value="刪除"/>??
????????</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>學生添加</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>密碼</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類實現，只需把注解寫上，spring就會自動幫你找到相應的bean，相應的注解標記意義，不明白的，可以自己查下@Service，@Controller，@Entity等等的內容。

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",?"添加失敗");???
????????}???
???????????
????????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類實現

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);???
?}???
}?

轉載于:https://www.cnblogs.com/summer520/p/3432748.html

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