第一个Spring demo

参考Spring3.x企业实战

1.新建web工程chapter5，导入jar包。注意：cglib和commons-dbcp这两个包

2.设计数据库

t_login_log表结构（存放日志信息），主键递增

t_user表结构（存放用户信息），主键递增

3.设计包结构

4.domain对象

User.java

package com.baobaotao.domain;

import java.io.Serializable;

import java.util.Date;

public class User implements Serializable {

    private static final long serialVersionUID = 1L;

    private int userId;

    private String userName;

    private String password;

    private int credits;

    private String lastIp;

    private Date lastVisit;

    public int getUserId() {

        return userId;

    }

    public void setUserId(int userId) {

        this.userId = userId;

    }

    public String getUserName() {

        return userName;

    }

    public void setUserName(String userName) {

        this.userName = userName;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

    public int getCredits() {

        return credits;

    }

    public void setCredits(int credits) {

        this.credits = credits;

    }

    public String getLastIp() {

        return lastIp;

    }

    public void setLastIp(String lastIp) {

        this.lastIp = lastIp;

    }

    public Date getLastVisit() {

        return lastVisit;

    }

    public void setLastVisit(Date lastVisit) {

        this.lastVisit = lastVisit;

    }

    public static long getSerialversionuid() {

        return serialVersionUID;

    }

    @Override

    public String toString() {

        return "User [userId=" + userId + ", userName=" + userName

                + ", password=" + password + ", credits=" + credits

                + ", lastIp=" + lastIp + ", lastVisit=" + lastVisit + "]";

    }

}

LoginLog.java

package com.baobaotao.domain;

import java.io.Serializable;

import java.util.Date;

public class LoginLog implements Serializable {

    private static final long serialVersionUID = 1L;

    private int loginLogId;

    private int userId;

    private String ip;

    private Date loginDate;

    public int getLoginLogId() {

        return loginLogId;

    }

    public void setLoginLogId(int loginLogId) {

        this.loginLogId = loginLogId;

    }

    public int getUserId() {

        return userId;

    }

    public void setUserId(int userId) {

        this.userId = userId;

    }

    public String getIp() {

        return ip;

    }

    public void setIp(String ip) {

        this.ip = ip;

    }

    public Date getLoginDate() {

        return loginDate;

    }

    public void setLoginDate(Date loginDate) {

        this.loginDate = loginDate;

    }

    public static long getSerialversionuid() {

        return serialVersionUID;

    }

    @Override

    public String toString() {

        return "LoginLog [loginLogId=" + loginLogId + ", userId=" + userId

                + ", ip=" + ip + ", loginDate=" + loginDate + "]";

    }

}

5.dao层（访问数据库相关操作）

UserDao.java

package com.baobaotao.dao;

import java.sql.ResultSet;

import java.sql.SQLException;

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

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.jdbc.core.RowCallbackHandler;

import org.springframework.stereotype.Repository;

import com.baobaotao.domain.User;

@Repository

public class UserDao {

    @Autowired

    private JdbcTemplate jdbcTemplate;

    public int getMatchCount(String userName,String password){

        String sqlStr="select count(*) from t_user where user_name=? and password=?";

        return jdbcTemplate.queryForInt(sqlStr,new Object[]{userName,password});

    }

    public User findUserByUserName(final String userName){

        String sqlStr="select user_id,user_name,credits from t_user where user_name=?";

        final User user=new User();

        jdbcTemplate.query(sqlStr,new Object[]{userName},

                new RowCallbackHandler(){

                    public void processRow(ResultSet rs) throws SQLException {

                        user.setUserId(rs.getInt("user_id"));

                        user.setUserName(userName);

                        user.setCredits(rs.getInt("credits"));

                    }

        } );

        return user;

    }

    public void updateLoginInfo(User user){

        String sqlStr=" update t_user set last_visit=?,last_ip=?,credits=? where user_id=?";

        jdbcTemplate.update(sqlStr, new Object[]{user.getLastVisit(),user.getLastIp(),user.getCredits(),user.getUserId()});

    }

}

LoginLogDao.java

package com.baobaotao.dao;

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

import org.springframework.jdbc.core.JdbcTemplate;

import org.springframework.stereotype.Repository;

import com.baobaotao.domain.LoginLog;

@Repository

public class LoginLogDao {

    @Autowired

    private JdbcTemplate jdbcTemplate;

    public void insertLoginLog(LoginLog loginLog){

        String sqlStr="insert into t_login_log(user_id,ip,login_datetime) values(?,?,?)";

        Object[] args={loginLog.getUserId(),loginLog.getIp(),loginLog.getLoginDate()};

        jdbcTemplate.update(sqlStr, args);

    }

}

6.service层（调用dao层操作）

UserService.java

package com.baobaotao.service;

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

import org.springframework.stereotype.Service;

import com.baobaotao.dao.LoginLogDao;

import com.baobaotao.dao.UserDao;

import com.baobaotao.domain.LoginLog;

import com.baobaotao.domain.User;

@Service

public class UserService {

    @Autowired

    private UserDao userDao;

    @Autowired

    private LoginLogDao loginLogDao;

    public boolean hasMatchUser(String userName,String password){

        int matchCount=userDao.getMatchCount(userName, password);

        return matchCount >0;

    }

    public User findUserByUserName(String userName){

        return userDao.findUserByUserName(userName);

    }

    public void loginSuccess(User user){

        user.setCredits(5+user.getCredits());

        LoginLog loginLog=new LoginLog();

        loginLog.setUserId(user.getUserId());

        loginLog.setIp(user.getLastIp());

        loginLog.setLoginDate(user.getLastVisit());

        userDao.updateLoginInfo(user);

        loginLogDao.insertLoginLog(loginLog);

    }

}

7.applicationContext.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:mvc="http://www.springframework.org/schema/mvc"

    xmlns:context="http://www.springframework.org/schema/context"

    xmlns:util="http://www.springframework.org/schema/util"

    xmlns:aop="http://www.springframework.org/schema/aop"

    xmlns:tx="http://www.springframework.org/schema/tx"

    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/context http://www.springframework.org/schema/context/spring-context-3.0.xsd

    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd

    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd

    http://www.springframework.org/schema/tx

    http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">

    <context:component-scan base-package="com.baobaotao.dao"/>

    <context:component-scan base-package="com.baobaotao.service"/> 

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"

           destroy-method="close"  p:driverClassName="com.mysql.jdbc.Driver"

           p:url="jdbc:mysql://localhost/sampledb"

           p:username="root"

           p:password="123456"/>

     <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" p:dataSource-ref="dataSource"/>

     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"

           p:dataSource-ref="dataSource"/>

     <aop:config proxy-target-class="true">

         <aop:pointcut id="serviceMethod" expression=" execution(* com.baobaotao.service..*(..))"/>

         <aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice"/>

     </aop:config>

     <tx:advice id="txAdvice" transaction-manager="transactionManager">

         <tx:attributes>

             <tx:method name="*"/>

         </tx:attributes>

     </tx:advice>

</beans>

8.测试

package com.baobaotao.service;

import org.junit.runner.RunWith;

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

import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import org.springframework.test.context.ContextConfiguration;

import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.baobaotao.domain.User;

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(locations={"/applicationContext.xml"})

public class TestUserService {

    @Autowired

    private UserService userService;

    public static void main(String[] args) {

        ApplicationContext atx=new ClassPathXmlApplicationContext("applicationContext.xml");

        UserService userService=(UserService) atx.getBean("userService");

        User user=userService.findUserByUserName("admin");

        System.out.println(user);

    }

}

一个小问题：如果不写 private UserService userService; 也能运行,不是没有注入bean吗？怎么能获得bean?

9.使用springmvc 配置web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5"

    xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

  <display-name></display-name>

  <context-param>

      <param-name>contextConfigLocation</param-name>

      <param-value>/WEB-INF/classes/applicationContext.xml </param-value>

  </context-param>

  <listener>

      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

  </listener>

  <servlet>

      <servlet-name>baobaotao</servlet-name>

      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

    <load-on-startup>2</load-on-startup>

  </servlet>

  <servlet-mapping>

      <servlet-name>baobaotao</servlet-name>

      <url-pattern>*.html</url-pattern>

  </servlet-mapping>

</web-app>

10.web层的控制器

package com.baobaotao.web;

import java.util.Date;

import javax.servlet.http.HttpServletRequest;

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

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.servlet.ModelAndView;

import com.baobaotao.domain.User;

import com.baobaotao.service.UserService;

@Controller

public class LoginController{

    @Autowired

    private UserService userService;

    @RequestMapping(value = "/index.html")

    public String loginPage(){

        return "login";

    }

    @RequestMapping(value = "/loginCheck.html")

    public ModelAndView loginCheck(HttpServletRequest request,LoginCommand loginCommand){

        boolean isValidUser=

            userService.hasMatchUser(loginCommand.getUserName(),

                                     loginCommand.getPassword());

         if(!isValidUser){

             return new ModelAndView("login","error","用户名或密码错误。");

         }else{

             User user=userService.findUserByUserName(loginCommand.getUserName());

             user.setLastIp(request.getRemoteAddr());

             user.setLastVisit(new Date());

             userService.loginSuccess(user);

             request.getSession().setAttribute("user", user);

             return new ModelAndView("main");

         }

    }

}

package com.baobaotao.web;

public class LoginCommand {

    private String userName;

    private String password;

    public String getUserName() {

        return userName;

    }

    public void setUserName(String userName) {

        this.userName = userName;

    }

    public String getPassword() {

        return password;

    }

    public void setPassword(String password) {

        this.password = password;

    }

}

11.配置springmvc的xml文件 baobaotao-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"

    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">

    <!-- 扫描web包，应用Spring的注解 -->

    <context:component-scan base-package="com.baobaotao.web"/>

    <!-- 配置视图解析器，将ModelAndView及字符串解析为具体的页面 -->

    <bean

        class="org.springframework.web.servlet.view.InternalResourceViewResolver"

        p:viewClass="org.springframework.web.servlet.view.JstlView"

        p:prefix="/WEB-INF/jsp/"

        p:suffix=".jsp" />

</beans>

12.在WEB-INF下建立jsp文件夹

login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>

<html>

    <head>

        <title>宝宝淘论坛登录</title>

    </head>

    <body>

        <c:if test="${!empty error}">

            <font color="red"><c:out value="${error}" /></font>

        </c:if>

        <form action="<c:url value="loginCheck.html"/>" method="post">

            用户名：

            <input type="text" name="userName">

            <br>

            密 码：

            <input type="password" name="password">

            <br>

            <input type="submit" value="登录" />

            <input type="reset" value="重置" />

        </form>

    </body>

</html>

main.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">

<title>宝宝淘论坛</title>

</head>

<body>

    ${user.userName},欢迎您进入宝宝淘论坛，您当前积分为${user.credits};

</body>

</html>

13.发布启动tomcat 输入 http://localhost:8080/chapter5/index.html即可进入登录界面

遇到的一些问题：

1.使用mysql数据库，我没设置密码，一直报Access denied for user 'root'@'localhost' (using password: YES)解决方法这个错误

解决：参考 http://blog.csdn.net/skywalker_leo/article/details/47274441

2.把一些其他的web程序要先关掉，不然启动的时候很有可能报错。

3.注意一些jar包的引入和jar包之间的冲突问题。

第一个Spring demo的更多相关文章

【Java】 Spring依赖注入小试牛刀：编写第一个Spring ApplicationContext Demo
0 Spring的依赖注入大致是这样工作的: 将对象如何构造(ID是什么?是什么类型?给属性设置什么值?给构造函数传入什么值?)写入外部XML文件里.在调用者需要调用某个类时,不自行构造该类的对象, ...
用idea 创建一个spring小demo，基于xml文件配置
1.首先,File->new->project ,进入新增项目页面或者在 2.勾选spring,然后点击下一步 3.修改项目名称和项目位置进入页面后 5.创建一个spring配置文件 ...
自定义模拟一个Spring IOC容器
一.模拟一个IOC容器: 介绍:现在,我们准备使用一个java project来模拟一个spring的IOC容器创建对象的方法,也就是不使用spring的jar自动帮助我们创建对象,而是通过自己手动书 ...
搭建第一个spring boot项目
一.开发工具建议使用Spring Tool Suite 下载地址:http://spring.io/tools/sts/all/ 点击versions选择相应的版本下载,解压后直接运行即可. 二.创建 ...
只需两步！Eclipse+Maven快速构建第一个Spring Boot项目
随着使用Spring进行开发的个人和企业越来越多,Spring从一个单一简介的框架变成了一个大而全的开源软件,最直观的变化就是Spring需要引入的配置也越来越多.配置繁琐,容易出错,让人无比头疼, ...
一个数据源demo
前言我们重复造轮子,不是为了证明我们比那些造轮子的人牛逼,而是明白那些造轮子的人有多牛逼. JDBC介绍在JDBC中,我们可以通过DriverManager.getConnection()创建(而 ...
第一个Spring Boot程序
Windows 10家庭中文版,java version "1.8.0_152", Eclipse Oxygen.1a Release (4.7.1a),Spring Tools ...
Sprint Boot入门（1）：创建第一个Spring Boot应用
搭建工程注:建议使用eclipse的STS插件创建Spring项目,而不是下面的Gradle项目,否则会导致有一些Spring文件不存在. new Gradle Project,如下点next,如 ...
使用IDEA结合MAVEN创建一个Spring Java Web项目
前言如今的Java项目,如果还使用传统的把jar包复制到目录下这种原始的方式,对于依赖管理来说实在是灾难.对某个功能需要引入某种技术包,但是你不确定是否已存在,如果分类好的话还好找,若是杂在一堆不仅 ...

随机推荐

OpenCV GPU CUDA OpenCL 配置
首先,正确安装OpenCV,并且通过测试. 我理解GPU的环境配置由3个主要步骤构成. 1. 生成关联文件,即makefile或工程文件 2. 编译生成与使用硬件相关的库文件,包括动态.静态库文件. ...
springfox.documentation.service.ApiInfo配置示例
Java Code Examples for springfox.documentation.service.ApiInfo The following are top voted examples ...
Intellij Idea系列之JavaSE项目的创建（一）
Intellij Idea系列之JavaSE项目的创建(一) 一.Intellij Idea于 Intellij Idea是捷克的Jetbrain公司的一款优秀的针对Java程序员的IDE,其自从问世 ...
Js 扩展
计算字符串的字节长度 String.prototype.len = function () { return this.replace(/[^\x00-\xff]/g, 'xx').length; } ...
56. Edit Distance && Simplify Path
Edit Distance Given two words word1 and word2, find the minimum number of steps required to convert ...
OS X 禁止Android File Transfer自动启动
操作步骤关闭Android File Manager 在Activity Manager中退出Android File Manager Agent进程在Applications中,将Android ...
网站接入QQ登录的两种方法
第一种使用系统自带按钮登录,但是这样会弹出新窗口,不喜欢 //调用QC.Login方法,指定btnId参数将按钮绑定在容器节点中 QC.Login({ //btnId:插入按钮的节点id,必选 btn ...
单链表在不知头结点的情况下对第i个元素的删除
一.首先,看看单链表中第i个元素的删除: Status ListDelete_L (LinkList &L,int i,ElemType &e){ //在带头结点的单链表L中,删除第i ...
9.S5PV210的时钟系统
1.时钟域:MSYS.DSYS.PSYS(1)因为S5PV210的时钟体系比较复杂,内部外设模块太多,因此把整个内部的时钟划分为3大块,叫做3个域.(2)MSYS: CPU(Cortex-A8内核). ...
Linux操作系统奥秘02-系统引导(GRUB)
GRUB的加载流程 GRUB是GNU的一款多重引导软件.GRUB包含了3个重要的文件:stage1 ,e2fsstage1_5,stage2.这三个文件分别代表了GRUB运行的3个阶段. 1.stag ...

第一个Spring demo

第一个Spring demo的更多相关文章

随机推荐

热门专题