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springmvc的第一个程序

2024-07-19 20:46:04   223人阅读

文中用的框架版本：spring 3,hibernate 3,没有的，自己上网下。

web.xml配置：

 1 <?xml version="1.0" encoding="UTF-8"?>    2 <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">    3   <display-name>s3h3</display-name>    4    <context-param>      5      <param-name>contextConfigLocation</param-name>      6      <param-value>classpath:applicationContext*.xml</param-value>      7  </context-param>      8   <listener>      9      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>     10  </listener>     11   12  <servlet>     13      <servlet-name>spring</servlet-name>     14      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     15      <load-on-startup>1</load-on-startup>     16  </servlet>     17  <servlet-mapping>     18      <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 -->   19      <url-pattern>*.do</url-pattern>     20  </servlet-mapping>     21   <welcome-file-list>   22     <welcome-file>index.jsp</welcome-file>   23   </welcome-file-list>   24 </web-app>

spring-servlet.xml 

 1 <?xml version="1.0" encoding="UTF-8"?>    2   <beans xmlns="http://www.springframework.org/schema/beans"      3        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"      4         xmlns:context="http://www.springframework.org/schema/context"      5    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    6        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd    7        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd    8        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">    9      10   <context:annotation-config />   11        <!-- 把标记了@Controller注解的类转换为bean -->     12       <context:component-scan base-package="com.mvc.controller" />     13       <!-- 启动Spring MVC的注解功能，完成请求和注解POJO的映射 -->     14       <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />     15         16        <!-- 对模型视图名称的解析，即在模型视图名称添加前后缀 -->     17        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"   18           p:prefix="/WEB-INF/view/" p:suffix=".jsp" />     19            20        <bean id="multipartResolver"     21           class="org.springframework.web.multipart.commons.CommonsMultipartResolver"     22           p:defaultEncoding="utf-8" />     23  </beans>

applicationContext.xml

 1 <?xml version="1.0" encoding="UTF-8"?>    2 <beans xmlns="http://www.springframework.org/schema/beans"   3  xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"   4  xmlns:p="http://www.springframework.org/schema/p" xmlns:tx="http://www.springframework.org/schema/tx"   5  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   6  xsi:schemaLocation="    7          http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd    8    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd    9    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd   10    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">   11   12  <context:annotation-config />   13  <context:component-scan base-package="com.mvc" />  <!-- 自动扫描所有注解该路径 -->   14   15  <context:property-placeholder location="classpath:/hibernate.properties" />   16   17  <bean id="sessionFactory"  18   class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">   19   <property name="dataSource" ref="dataSource" />   20   <property name="hibernateProperties">   21    <props>   22     <prop key="hibernate.dialect">${dataSource.dialect}</prop>   23     <prop key="hibernate.hbm2ddl.auto">${dataSource.hbm2ddl.auto}</prop>   24     <prop key="hibernate.hbm2ddl.auto">update</prop>   25    </props>   26   </property>   27   <property name="packagesToScan">   28    <list>   29     <value>com.mvc.entity</value><!-- 扫描实体类，也就是平时所说的model -->   30    </list>   31     </property>   32  </bean>   33   34  <bean id="transactionManager"  35   class="org.springframework.orm.hibernate3.HibernateTransactionManager">   36   <property name="sessionFactory" ref="sessionFactory" />   37   <property name="dataSource" ref="dataSource" />   38  </bean>   39   40  <bean id="dataSource"  41   class="org.springframework.jdbc.datasource.DriverManagerDataSource">   42   <property name="driverClassName" value="http://www.mamicode.com/${dataSource.driverClassName}" />   43   <property name="url" value="http://www.mamicode.com/${dataSource.url}" />   44   <property name="username" value="http://www.mamicode.com/${dataSource.username}" />   45   <property name="password" value="http://www.mamicode.com/${dataSource.password}" />   46  </bean>   47  <!-- Dao的实现 -->   48  <bean id="entityDao" class="com.mvc.dao.EntityDaoImpl">     49   <property name="sessionFactory" ref="sessionFactory" />   50  </bean>   51  <tx:annotation-driven transaction-manager="transactionManager" />   52  <tx:annotation-driven mode="aspectj"/>   53      54     <aop:aspectj-autoproxy/>     55 </beans>

hibernate.properties    数据库连接配置

1 dataSource.password=123  2 dataSource.username=root   3 dataSource.databaseName=test   4 dataSource.driverClassName=com.mysql.jdbc.Driver   5 dataSource.dialect=org.hibernate.dialect.MySQL5Dialect   6 dataSource.serverName=localhost:3306  7 dataSource.url=jdbc:mysql://localhost:3306/test   8 dataSource.properties=user=${dataSource.username};databaseName=${dataSource.databaseName};serverName=${dataSource.serverName};password=${dataSource.password}   9 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);   }

 DAO实现层：

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="http://www.mamicode.com/