《Spring3.0就这么简单》第1章快速入门

问题

如何将jsp中传递到HttpServletRequest的参数,自动装配到Java对象中
【成功】
public void setUsernAme(String username)
<input type="text" name="UsernAme">
【成功】
public void setUsernAme(String username)
<input type="text" name="usernAme">
【成功】
public void setusernAme(String username)
<input type="text" name="UsernAme">
【成功】
public void setusernAme(String username)
<input type="text" name="usernAme">
 
《Spring3.0就这么简单》第1章快速入门
 
【访问远程数据库】
【ApplicationContext.xml中】
p:url="jdbc:mysql://125.216.243.231:3306/sampledb31"

【问题】java.lang.ClassNotFoundException: org.objectweb.asm.Type
添加依赖:
<dependency>
<groupId>asm</groupId>
<artifactId>asm</artifactId>
<version>3.3.1</version>
</dependency>

代码路径

第一章成功运行工作区:笔记本:D:\Workspaces\SpringIsSimple_20141118\actionSpring\chapter1
台式机:E:\Workspaces\DeveloperStudio_workspace\actionSpring\chapter1
        遇到两个jar包找不到的问题,手动通过everything添加到C:\Users\Administrator\.m2\repository\...
http://125.216.243.231:8080/chapter1/admin/loginCheck.html
 
 

创建库表

DROP DATABASE IF EXISTS sampledb31;

CREATE DATABASE sampledb31 DEFAULT CHARACTER SET utf8;

USE sampledb31;

##创建用户表

CREATE TABLE t_user (

user_id   INT AUTO_INCREMENT PRIMARY KEY,

user_name VARCHAR(30),

password  VARCHAR(32),

last_visit datetime,

last_ip  VARCHAR(23)

)ENGINE=InnoDB;

##创建用户登录日志表

CREATE TABLE t_login_log (

login_log_id  INT AUTO_INCREMENT PRIMARY KEY,

user_id   INT,

ip  VARCHAR(23),

login_datetime datetime

)ENGINE=InnoDB;

##插入初始化数据

INSERT INTO t_user (user_name,password)

VALUES('admin','123456');

COMMIT;

##查询

select * from t_user;

select * from t_login_log;

pom.xml

<dependency><!--①依赖的Spring模块类库 -->

<groupId>org.springframework</groupId>

<artifactId>spring-beans</artifactId>

<version>${org.springframework.version}</version>

</dependency>

Maven仓库规则

<dependency>下面这个是hibernate的Dependency配置

<groupId>org.hibernate</groupId>
    <artifactId>hibernate</artifactId>
    <version>3.2.6.ga</version>
</dependency>

它被下载后将会被存放至

%repository%\org\hibernate\hibernate\3.2.6.ga\hibernate-3.2.6.ga.jar

其中%repository%就是你本地的repository目录!

不知大家看出来了没有,它是按你的Dependency的groupid + artifactid + version,然后以点号作分隔,来建立文件夹的,最后建立的文件夹如下

|--org

|--hibernate

|--hibernate

|--3.2.6.ga

|--hibernate-3.2.6.ga.jar

可能会有些人会问那个jar包的名字是怎么来的,细心的人或许早己观察出来了,没错,就是artifactId + "-" + version + ".jar"。

好了,下面我们按这个规则去找一下另外一个Dependency放在哪吧

<dependency>

<groupId>com.google.gwt</groupId>

<artifactId>gwt-servlet</artifactId>

<version>1.4.61</version>

</dependency>

持久层领域对象:User.java + LoginLog.java

package com.smart.domain;

import java.io.Serializable;

import java.util.Date;

public class User implements Serializable {

private int userId;

private String userName;

private String password;

private String lastIp;

private Date lastVisit;

//省略一系列set/get方法

}

UserDao

import java.sql.ResultSet;package com.smart.dao;

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.smart.domain.User;

//通过Spring注解定义一个DAO

@Repository

public class UserDao {

//自动注入JdbcTemplate的Bean

@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 "

+ " 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);

}

});

return user;

}

public void updateLoginInfo(User user) {

String sqlStr = " UPDATE t_user SET last_visit=?,last_ip=?"

+ " WHERE user_id =?";

jdbcTemplate.update(sqlStr, new Object[]{user.getLastVisit(),

user.getLastIp(), user.getUserId()});

}

}

LoginLogDao

package com.smart.dao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
import com.smart.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);
    }

在Spring中装配DAO: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:context="http://www.springframework.org/schema/context
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-3.1.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.1.xsd 
http://www.springframework.org/schema/tx 
http://www.springframework.org/schema/tx/spring-tx-3.1.xsd 
http://www.springframework.org/schema/aop 
http://www.springframework.org/schema/aop/spring-aop-3.1.xsd">

<!-- 扫描类包,将标注Spring注解的类自动转化Bean,同时完成Bean的注入 --> 
<context:component-scan base-package="com.smart.dao"/> 
<context:component-scan base-package="com.smart.service"/>

<!-- 配置数据源 --> 
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 
destroy-method="close" 
p:driverClassName="com.mysql.jdbc.Driver" 
p:url="jdbc:mysql://localhost:3306/sampledb31" 
p:username="root" 
p:password="123" />

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

<!-- 配置事务管理器 --> 
<bean id="transactionManager" 
class="org.springframework.jdbc.datasource.DataSourceTransactionManager" 
p:dataSource-ref="dataSource" />

<!-- 通过AOP配置提供事务增强,让service包下所有Bean的所有方法拥有事务 --> 
<aop:config proxy-target-class="true"> 
<aop:pointcut id="serviceMethod" 
        expression=" execution(* com.smart.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>

业务层:UserService

《Spring3.0就这么简单》第1章快速入门
import org.springframework.beans.factory.annotation.Autowired;package com.smart.service;

import org.springframework.stereotype.Service;

import com.smart.dao.LoginLogDao;

import com.smart.dao.UserDao;

import com.smart.domain.LoginLog;

import com.smart.domain.User;

//将一个UserService标注为一个服务层的Bean。

@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) {

LoginLog loginLog = new LoginLog();

loginLog.setUserId(user.getUserId());

loginLog.setIp(user.getLastIp());

loginLog.setLoginDate(user.getLastVisit());

loginLogDao.insertLoginLog(loginLog);

}

}

展现层(Spring MVC配置)

自动启动Spring容器的配置: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">

从类路径下加载Spring配置文件
<context-param> 
<param-name>contextConfigLocation</param-name> 
<param-value>classpath:applicationContext.xml</param-value> 
</context-param>

负责启动Spring监听器
<listener> 
<listener-class> 
org.springframework.web.context.ContextLoaderListener 
</listener-class> 
</listener>

Spring MVC地址映射:web.xml(servlet截获URL请求)

<servlet>

<servlet-name>viewspace</servlet-name>

<servlet-class>

org.springframework.web.servlet.DispatcherServlet

</servlet-class>

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

</servlet>

<servlet-mapping>

<servlet-name>viewspace</servlet-name>

<url-pattern>*.html</url-pattern> 让所有以.html为后缀的URL都能被viewspace Servlet截获。转由Spring MVC框架进行处理。

</servlet-mapping>

</web-app>
请求被Spring MVC截获后,首先根据请求的URL查找目标的处理控制器。

并将请求参数封装成一个“命令”对象一起传给控制器处理。

控制器调用Spring容器中的业务Bean完成业务处理工作并返回结果视图。

LoginController 处理登陆请求

1.6.2  处理控制器

package com.smart.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.smart.domain.User;

import com.smart.service.UserService;

//标记为Spring MVC的控制器

@Controller

@RequestMapping(value = "/admin") 【指定方法如何映射请求路径】

public class LoginController {

@Autowired

private UserService userService;

//负责处理/login.html请求

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

public String loginPage() {

//System.out.println("LoginController loginPage()");

return "login";

}

//负责处理/loginCheck.html请求

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

public ModelAndView loginCheck(HttpServletRequest request, LoginCommand loginCommand) {//自动配置到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.getLocalAddr());

user.setLastVisit(new Date());

userService.loginSuccess(user);

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

return new ModelAndView("main");

}

}

}

viewspace-servlet.xml

Spring MVC配置文件

在viewspace-servlet.xml中声明LoginCommand控制器

<?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-3.1.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.1.xsd"> 
<!-- 扫描web包,应用Spring的注解 --> 
<context:component-scan base-package="com.smart.web"/>

<bean id="defaultAnnotationHandlerMapping" 
class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> 
<bean id="annotationMethodHandlerAdapter" 
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

<!-- 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>

ModelAndView的解析配置 - viewspace-servlet.xml

第二个和第三个参数分别为数据模型名称,数据模型对象。
ModelAndView第一个参数代表视图的逻辑名。(login....main...)

数据模型对象将以数据模型名称为参数名,放置到request的属性中。

定义解析规则的bean,将视图逻辑名解析为具体的视图页面

<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>

【视图逻辑名mian解析为:/WEB-INF/jsp/main.jsp】

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>景区网站管理员登录</title> 
</head>

<body>

//JSTL标签库对登陆错误返回的信息进行处理。

引用的error变量。这个变量是            return new ModelAndView("login", "error", "用户名或密码错误"); 中的error参数。
<c:if test="${!empty error}"> 
<font color="red"><c:out value="${error}"/></font>

</c:if>

<form action="<c:url value="/admin/loginCheck.html"/>" method="post"> 自动加上应用程序部署根目录。<c:url>标签将输出/admin/loginController.html。
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>

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