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);
}
}
OK,例子写完。有其它业务内容,只需直接新建view,并实现相应comtroller和service就行了,配置和dao层的内容基本不变,也就是每次只需写jsp(view),controller和service调用dao就行了。
怎样,看了这个,spring mvc是不是比ssh实现更方便灵活。
http://www.blogjava.net/pengo/archive/2010/11/28/339229.html