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:
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<?xml version="1.0" encoding="UTF-8"?>
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<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">
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<display-name>s3h3</display-name>
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<context-param>
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<param-name>contextConfigLocation</param-name>
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<param-value>classpath:applicationContext*.xml</param-value>
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</context-param>
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<listener>
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<listener-
class>org.springframework.web.context.ContextLoaderListener</listener-
class>
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</listener>
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<servlet>
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<servlet-name>spring</servlet-name>
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<servlet-
class>org.springframework.web.servlet.DispatcherServlet</servlet-
class>
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<load-on-startup>1</load-on-startup>
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</servlet>
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<servlet-mapping>
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<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 -->
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<url-pattern>*.
do</url-pattern>
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</servlet-mapping>
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<welcome-file-list>
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<welcome-file>index.jsp</welcome-file>
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</welcome-file-list>
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</web-app>
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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> ![](http://www.blogjava.net/Images/OutliningIndicators/None.gif)
applicationContext.xml代码
hibernate.properties数据库连接配置
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dataSource.password=123
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dataSource.username=root
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dataSource.databaseName=test
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dataSource.driverClassName=com.mysql.jdbc.Driver
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dataSource.dialect=org.hibernate.dialect.MySQL5Dialect
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dataSource.serverName=localhost:3306
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dataSource.url=jdbc:mysql://localhost:3306/test
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dataSource.properties=user=${dataSource.username};databaseName=${dataSource.databaseName};serverName=${dataSource.serverName};password=${dataSource.password}
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dataSource.hbm2ddl.auto=update
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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
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CREATE TABLE `test`.`student` (
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`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
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`name` varchar(45) NOT NULL,
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`psw` varchar(45) NOT NULL,
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PRIMARY KEY (`id`)
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)
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建好表后,生成实体类
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package com.mvc.entity;
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import java.io.Serializable;
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import javax.persistence.Basic;
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import javax.persistence.Column;
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import javax.persistence.Entity;
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import javax.persistence.GeneratedValue;
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import javax.persistence.GenerationType;
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import javax.persistence.Id;
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import javax.persistence.Table;
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@Entity
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@Table(name = "student")
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public class Student implements Serializable {
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private static final long serialVersionUID = 1L;
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@Id
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@Basic(optional = false)
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@GeneratedValue(strategy = GenerationType.IDENTITY)
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@Column(name = "id", nullable = false)
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private Integer id;
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@Column(name = "name")
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private String user;
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@Column(name = "psw")
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private String psw;
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public Integer getId() {
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return id;
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}
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public void setId(Integer id) {
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this.id = id;
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}
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public String getUser() {
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return user;
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}
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public void setUser(String user) {
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this.user = user;
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}
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public String getPsw() {
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return psw;
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}
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public void setPsw(String psw) {
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this.psw = psw;
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}
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}
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Dao层实现
Dao在applicationContext.xml注入
<bean id="entityDao" class="com.mvc.dao.EntityDaoImpl">
<property name="sessionFactory" ref="sessionFactory" />
</bean>![](http://www.blogjava.net/Images/OutliningIndicators/None.gif)
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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
student_add.jsp
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。
service类实现