基于annotation的springmvc小实例

数据库的表结构：

View Code

DROP TABLE IF EXISTS `user`;

CREATE TABLE `user` (
  `id` bigint(10) NOT NULL auto_increment,
  `username` varchar(20) default NULL,
  `password` varchar(20) default NULL,
  `age` int(4) default NULL,
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gbk;

java：

User

package com.medol;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

/**
 * 实体类
 * */
@Entity
@Table(name="user")
public class User {
    private long id;
    private String username;
    private String password;
    private int age;
    @Id 
    @GeneratedValue(strategy=GenerationType.IDENTITY)
    public long getId() {
        return id;
    }
    public void setId(long id) {
        this.id = id;
    }
    @Column(name="username", length=20)
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    @Column(name="password", length=20)
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Column(name="age", length=4)
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
}

MyHibernateDaoSupport

package com.dao;

import javax.annotation.Resource;

import org.hibernate.SessionFactory;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

public class MyHibernateDaoSupport extends HibernateDaoSupport {

    @Resource(name = "sessionFactory")
    // 为父类 HibernateDaoSupport 注入 sessionFactory
    public void setSuperSessionFactory(SessionFactory sessionFactory) {
        super.setSessionFactory(sessionFactory);
    }
}

BaseDao

package com.dao;

import java.util.List;

public interface BaseDao {
    public List getModel(String hql);
    public void saveModel(Object model);
    public List search(String hql, Object paramValue);
    public List search(String hql, Object[] paramValue);
    public Object getModelDetail(Class cl, Long id);
    public void deModel(Class cl, Long id);
}

BaseDaoImpl

package com.dao;

import java.util.List;

import org.springframework.stereotype.Repository;

@Repository
public class BaseDaoImpl extends MyHibernateDaoSupport implements BaseDao{

    public List getModel(String hql) {
        // TODO Auto-generated method stub
        return super.getHibernateTemplate().find(hql);
    }

    public void saveModel(Object model) {
        // TODO Auto-generated method stub
        super.getHibernateTemplate().save(model);
    }

    public List search(String hql, Object paramValue) {
        // TODO Auto-generated method stub
        return super.getHibernateTemplate().find(hql,paramValue);
    }

    public List search(String hql, Object[] paramValue) {
        // TODO Auto-generated method stub
        return super.getHibernateTemplate().find(hql, paramValue);
    }

    public void deModel(Class cl, Long id) {
        // TODO Auto-generated method stub
        super.getHibernateTemplate().delete(getModelDetail(cl, id));
    }

    public Object getModelDetail(Class cl, Long id) {
        // TODO Auto-generated method stub
        return super.getHibernateTemplate().get(cl, id);
    }
    

}

UserServie

package com.service;

import java.util.List;

import com.medol.User;

public interface UserServie {
    public List getUser();
    public void saveUser(User user);
    public List searchById(long id);
    public List searchByNameandId(Object[] paramValue);
    public void delUserById(Class cl,long id);
}

UserServiceImpl

package com.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.dao.BaseDao;
import com.medol.User;

@Service("userService")
public class UserServiceImpl implements UserServie {
    
    @Autowired
    private BaseDao baseDao;

    public List getUser() {
        // TODO Auto-generated method stub
        String hql = "from com.medol.User user";
        return baseDao.getModel(hql);
    }

    public void saveUser(User user) {
        // TODO Auto-generated method stub
        baseDao.saveModel(user);
    }

    public List searchById(long id) {
        // TODO Auto-generated method stub
        String hql = "from com.medol.User user where id=?";
        return baseDao.search(hql,id);
    }

    public List searchByNameandId(Object[] paramValue) {
        // TODO Auto-generated method stub
        String hql = "from com.medol.User user where username = ? or age = ?";
        return baseDao.search(hql, paramValue);
    }

    public void delUserById(Class cl,long id) {
        // TODO Auto-generated method stub
        baseDao.deModel(cl, id);
    }


}

UserController

package com.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.medol.User;
import com.service.UserServie;

@Controller
public class UserController {
    @Autowired
    private UserServie userServie;
    
    /**
     * @ModelAttribute 此注解可以用于web请求参数和方法参数的绑定，也可用于方法的返回值作为模型数据
     * （这种模型数据在类中全局有效，比如这里initUser方法绑定的模型数据在此类的任何方法中都能访问到这种模型数据）。
     * */
    
    @RequestMapping("/save.do")
    public ModelAndView addUser(@ModelAttribute User user){
        //保存User
        userServie.saveUser(user);
        //获取User
        return getUserList();
    }
    
    @RequestMapping("/delete.do")
    public ModelAndView delUserById(@RequestParam("id")long id){
        userServie.delUserById(User.class, id);
        return getUserList();
    }
    @RequestMapping("/search.do")
    public ModelAndView getUserByNameAndAge(@RequestParam("username")String username,@RequestParam("age")int age){
        Object[] objects = new Object[2];
        objects[0] = username;
        objects[1] = age;
        List users = userServie.searchByNameandId(objects);
        return new ModelAndView("users").addObject("users", users);
    }
    
    @RequestMapping("/list.do")
    public ModelAndView getUserList(){
        List<User> users = userServie.getUser();
        return new ModelAndView("users").addObject("users", users);
    }
}

jsp:

users.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!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>注册用户信息</title>
</head>
<body>
注册用户信息：
    <form action="<%=request.getContextPath() %>/save.do" method="post">
    <table width="50%" border="1px">
    <tr><td width="10%">username:</td><td><input type="text" name="username"></td></tr>
    <tr><td>password:</td><td><input type="text" name="password"></td></tr>
    <tr><td>age:</td><td><input type="text" name="age"></td></tr>
    <tr><td></td><td><input type="submit" value="submit"><input type="reset" value="reset"></td></tr>
    </table>
    </form>
    <br/>
    <br/>
查找用户信息：
    <form action="<%=request.getContextPath() %>/search.do" method="post">
    <table width="50%" border="1px">
    <tr><td width="10%">username:</td><td><input type="text" name="username"></td></tr>
    <tr><td>age:</td><td><input type="text" name="age"></td></tr>
    <tr><td></td><td><input type="submit" value="submit"><input type="reset" value="reset"></td></tr>
    </table>
    </form>
    <br/>
    <br/>
显示用户列表：<br/>
    <!-- requestScope是el表达式的隐含对象，${requestScope.name}和request.getAttribute("name")是一样的  -->
    <c:if test="${empty requestScope.users}">
        对不起,没有要显示的记录!!!!
    </c:if>
    <c:if test="${!empty requestScope.users}">
        <c:forEach items="${requestScope.users}" var="s">
            <c:out value="${s.id}"/>
            <c:out value="${s.username}"/>
            <c:out value="${s.password}"/>
            <c:out value="${s.age}"/>
               <a href="<%=request.getContextPath() %>/delete.do?id=${s.id}"><c:out value="delete"/></a>
            <br/>
        </c:forEach>
    </c:if>
</body>
</html>

配置文件：

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <!--  Spring 服务层的配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <!-- spring 容器启动监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--  Spring MVC 的Servlet，它将加载WEB-INF/annomvc-servlet.xml 的
　　　    配置文件，以启动Spring MVC模块-->
    <servlet>
        <servlet-name>annomvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/annomvc-servlet.xml</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>annomvc</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

annomvc-servlet.xml

<?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"
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/mvc              
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd ">

    <!-- ①：对web包中的所有类进行扫描，以完成Bean创建和自动依赖注入的功能 -->
    <context:component-scan base-package="com.controller" />
    <!-- ②：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" />
    <!--  ③：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="/jsp/" p:suffix=".jsp" />
</beans>

applicationContext.xml

<?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">
    <!-- 自动扫描所有注解该路径 -->
    <context:annotation-config />
    <context:component-scan base-package="com" />
    
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" >
        <property name="driverClassName">
            <value>com.mysql.jdbc.Driver</value>
        </property>
        <property name="url">
            <value>jdbc:mysql://localhost:3306/mvctest</value>
        </property>
        <property name="username">
            <value>root</value>
        </property>
        <property name="password">
            <value>root</value>
        </property>
    </bean> 
    <!-- 配置 SessionFactory,由 Spring 容器来管理 Hibernate -->
    <!-- 非 Annotation 时,使用 org.springframework.orm.hibernate3.LocalSessionFactoryBean, 
        它注入实体类的方式是 setMappingResources(),而 Hibernate Annotation 所用的 映射方式 不是 mapping resource,
        而是 mapping class,这就要用到 LocalSessionFactoryBe an 的子类 AnnotationSessionFactoryBean 了.因为 
        AnnotationSessionFactoryBean 它支持 实体的注入 方式 setAnnotatedClasses,即对应 Hibernate 中的 mapping
         class.参见这两个类的 源代码. --> 
     <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="dataSource">
            <ref local="dataSource" />
        </property>
        <property name="annotatedClasses">
            <list>
                <value>com.medol.User</value>
            </list>
        </property>
       <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <!-- prop key="hibernate.dialect"> org.hibernate.dialect.Oracle9Dialect </prop> -->
                <prop key="hibernate.show_sql"> true </prop>
                <!--<prop key="hibernate.hbm2ddl.auto">update</prop>-->
                <!-- prop key="hibernate.default_schema"> xdb </prop-->
                <!-- 主要设置hibernate 缓存和批处理的大-->
                <prop key="hibernate.jdbc.batch_versioned_data">true</prop>
                 <!-- <prop key="hibernate.connection.provider_class">net.sf.hibernate.connection.DatasourceConnectionProvider</prop>
                 <prop key="hibernate.cache.provider_class">net.sf.hibernate.cache.EhCacheProvider</prop> -->
                <prop key="hibernate.jdbc.fetch_size">50</prop>
                
                <!-- 自动增加新表，重新启动服务时执行该命令，应用时务必注释此句（本机使用） -->
                <!--prop key="hibernate.hbm2ddl.auto">update</prop-->
                
                <prop key="hibernate.jdbc.batch_size">20</prop>
            </props>
        </property>
    </bean>

    <!-- 配置事务管理 -->
    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory">
            <ref local="sessionFactory"></ref>
        </property>
    </bean>
    
</beans>

访问地址：http://localhost:8080/springmvc/users.jsp