目录
该文详细的通过Spring IOC、MyBatis、Servlet、Maven及Spring整合MyBatis的等技术完成一个简单的图书管理功能,实现图书列表、删除、多删除、编辑、新增功能。梳理前面学习的内容《Spring整合MyBatis(Maven+MySQL)一》与《Spring整合MyBatis(Maven+MySQL)二》,做一个完整的示例完成一个简单的图书管理功能,主要使用到的技术包含Spring、MyBatis、Maven、MySQL及简单MVC等。最后的运行效果如下所示:
项目结构如下:
1.1、创建一个简单的Maven项目,项目信息如下:
1.2、修改层面信息,在项目上右键选择属性,再选择“Project Facets”,先设置java运行环境为1.7,先去掉"Dynamic Web Module"前的勾,然后保存关闭;再打开勾选上"Dynamic Web Module",版本选择“3.0”;这里在左下解会出现一个超链接,创建“Web Content”,完成关闭。
1.3、修改项目的部署内容。项目上右键属性,选择“Deplyment Assembly”,删除不需要发布的内容如:带“test”的两个目录,WebContent目录,再添加一个main下的webapp目录。
修改后的结果如下所示:
1.4、修改项目内容。将WebContent下的内容复制到/src/main/webapp下,再删除WebContent目录,修改后的结果如下所示:
1.5、添加“服务器运行时(Server Runtime)”,添加后的结果如下:
启动MySQL,创建数据库,新建表books,插入测试数据,完成后的表如下所示:
创建表的sql脚本如下:
/*
Navicat MySQL Data Transfer
Source Server : localhost
Source Server Version : 50536
Source Host : localhost:3306
Source Database : db1
Target Server Type : MYSQL
Target Server Version : 50536
File Encoding : 65001
Date: 2016-07-06 22:05:07
*/
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `books`
-- ----------------------------
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books` (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT '编号',
`title` varchar(100) NOT NULL COMMENT '书名',
`price` decimal(10,2) DEFAULT NULL COMMENT '价格',
`publishDate` timestamp NULL DEFAULT CURRENT_TIMESTAMP COMMENT '出版日期',
PRIMARY KEY (`id`),
UNIQUE KEY `title` (`title`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of books
-- ----------------------------
INSERT INTO `books` VALUES ('1', 'Java编程思想', '98.50', '2005-01-02 00:00:00');
INSERT INTO `books` VALUES ('2', 'HeadFirst设计模式', '55.70', '2010-11-09 00:00:00');
INSERT INTO `books` VALUES ('3', '第一行Android代码', '69.90', '2015-06-23 00:00:00');
INSERT INTO `books` VALUES ('4', 'C++编程思想', '88.50', '2004-01-09 00:00:00');
INSERT INTO `books` VALUES ('5', 'HeadFirst Java', '55.70', '2013-12-17 00:00:00');
INSERT INTO `books` VALUES ('6', '疯狂Android', '19.50', '2014-07-31 00:00:00');
需特别注意的是书名是唯一键。
项目主要依赖的jar包有Spring核心包、Spring AOP包、MyBatis ORM包、MyBatis-Spring适配包、JSTL、JUnit、Log4j2等,具体的pom.xml文件如下:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.zhangguo</groupId>
<artifactId>BookStore</artifactId>
<version>0.0.1</version>
<packaging>war</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<spring.version>4.3.0.RELEASE</spring.version>
</properties>
<dependencies>
<!--Spring框架核心库 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- aspectJ AOP 织入器 -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.9</version>
</dependency>
<!-- Spring Web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!--mybatis-spring适配器 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!--Spring java数据库访问包,在本例中主要用于提供数据源 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--mysql数据库驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!--log4j日志包 -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.6.1</version>
</dependency>
<!-- mybatis ORM框架 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.1</version>
</dependency>
<!-- JUnit单元测试工具 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
</dependency>
<!--c3p0 连接池 -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<!-- jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
</project>
如果是第一次依赖相关的包,则需要下载时间,请耐心等待,如果下载失败请手动下载后复制到本地的资源库中。依赖后的项目结果如下:
为了实现与数据库中的books表进行关系映射新建一个Book类,具体代码如下:
package com.zhangguo.bookstore.entities;
import java.util.Date;
/**
* 图书实体
*/
public class Book {
/**
* 编号
*/
private int id;
/**
* 书名
*/
private String title;
/**
* 价格
*/
private double price;
/**
* 出版日期
*/
private Date publishDate;
public Book(int id, String title, double price, Date publishDate) {
this.id = id;
this.title = title;
this.price = price;
this.publishDate = publishDate;
}
public Book() {
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public double getPrice() {
return price;
}
public void setPrice(double price) {
this.price = price;
}
public Date getPublishDate() {
return publishDate;
}
public void setPublishDate(Date publishDate) {
this.publishDate = publishDate;
}
}
这个项目中我们采用接口与xml结束的形式完成关系与对象间的映射,在接口中定义一些数据访问的方法,在xml文件中定义实现数据访问需要的sql脚本。图书数据访问映射接口如下:
package com.zhangguo.bookstore.mapper;
import java.util.List;
import org.apache.ibatis.annotations.Param;
import com.zhangguo.bookstore.entities.Book;
/**
* 图书数据访问接口
*/
public interface BookDAO {
/**
* 获得所有图书
*/
public List<Book> getAllBooks();
/**
* 根据图书编号获得图书对象
*/
public Book getBookById(@Param("id") int id);
/**
* 添加图书
*/
public int add(Book entity);
/**
* 根据图书编号删除图书
*/
public int delete(int id);
/**
* 更新图书
*/
public int update(Book entity);
}
为MyBatis ORM创建的映射文件BookMapper.xml(命名尽量都遵循一个规则,便于扫描,这里约定以实体名+Mapper)如下:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--命名空间应该是对应接口的包名+接口名 -->
<mapper namespace="com.zhangguo.bookstore.mapper.BookDAO">
<!--id应该是接口中的方法,结果类型如没有配置别名则应该使用全名称 -->
<!--获得所有图书 -->
<select id="getAllBooks" resultType="Book">
select id,title,price,publishDate from books
</select>
<!--获得图书对象通过编号 -->
<select id="getBookById" resultType="Book">
select id,title,price,publishDate from books where id=#{id}
</select>
<!-- 增加 -->
<insert id="add">
insert into books(title,price,publishDate)
values(#{title},#{price},#{publishDate})
</insert>
<!-- 删除 -->
<delete id="delete">
delete from books where id=#{id}
</delete>
<!-- 更新 -->
<update id="update">
update books set title=#{title},price=#{price},publishDate=#{publishDate}
where id=#{id}
</update>
</mapper>
6.1、在源代码的根目录下新建 db.properties文件,用于存放数据库连接信息,文件内容如下:
#mysql jdbc
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db1?useUnicode=true&characterEncoding=UTF-8
jdbc.uid=root
jdbc.pwd=root
6.2、在源代码的根目录下新建 applicationContext.xml文件,用于整合MyBatis与Spring,该文件是整个项目的控制中心,非常关键,具体的内容如下:
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd">
<!--1 引入属性文件,在配置中占位使用 -->
<context:property-placeholder location="classpath*:db.properties" />
<!--2 配置C3P0数据源 -->
<bean id="datasource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<!--驱动类名 -->
<property name="driverClass" value="${jdbc.driver}" />
<!-- url -->
<property name="jdbcUrl" value="${jdbc.url}" />
<!-- 用户名 -->
<property name="user" value="${jdbc.uid}" />
<!-- 密码 -->
<property name="password" value="${jdbc.pwd}" />
<!-- 当连接池中的连接耗尽的时候c3p0一次同时获取的连接数 -->
<property name="acquireIncrement" value="5"></property>
<!-- 初始连接池大小 -->
<property name="initialPoolSize" value="10"></property>
<!-- 连接池中连接最小个数 -->
<property name="minPoolSize" value="5"></property>
<!-- 连接池中连接最大个数 -->
<property name="maxPoolSize" value="20"></property>
</bean>
<!--3 会话工厂bean sqlSessionFactoryBean -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据源 -->
<property name="dataSource" ref="datasource"></property>
<!-- 别名 -->
<property name="typeAliasesPackage" value="com.zhangguo.bookstore.entities"></property>
<!-- sql映射文件路径 -->
<property name="mapperLocations" value="classpath*:com/zhangguo/bookstore/mapper/*Mapper.xml"></property>
</bean>
<!--4 自动扫描对象关系映射 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!--指定会话工厂,如果当前上下文中只定义了一个则该属性可省去 -->
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
<!-- 指定要自动扫描接口的基础包,实现接口 -->
<property name="basePackage" value="com.zhangguo.bookstore.mapper"></property>
</bean>
<!--5 声明式事务管理 -->
<!--定义事物管理器,由spring管理事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="datasource"></property>
</bean>
<!--支持注解驱动的事务管理,指定事务管理器 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!--6 容器自动扫描IOC组件 -->
<context:component-scan base-package="com.zhangguo.bookstore"></context:component-scan>
<!--7 aspectj支持自动代理实现AOP功能 -->
<aop:aspectj-autoproxy proxy-target-class="true"></aop:aspectj-autoproxy>
</beans>
共有7处配置,第7处配置非必要,另外关于事务管理可以选择AOP拦截式事务管理。
创建BookService服务类,完成图书管理业务,有些项目中也叫业务层,这里我们叫服务层,具体实现如下:
package com.zhangguo.bookstore.service;
import java.util.List;
import javax.annotation.Resource;
import org.apache.ibatis.annotations.Param;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.zhangguo.bookstore.entities.Book;
import com.zhangguo.bookstore.mapper.BookDAO;
@Service
public class BookService{
@Resource
BookDAO bookdao;
public List<Book> getAllBooks() {
return bookdao.getAllBooks();
}
public Book getBookById(int id){
return bookdao.getBookById(id);
}
public int add(Book entity) throws Exception {
if(entity.getTitle()==null||entity.getTitle().equals("")){
throw new Exception("书名必须不为空");
}
return bookdao.add(entity);
}
@Transactional
public int add(Book entity1,Book entityBak){
int rows=0;
rows=bookdao.add(entity1);
rows=bookdao.add(entityBak);
return rows;
}
public int delete(int id) {
return bookdao.delete(id);
}
/**
* 多删除
*/
public int delete(String[] ids){
int rows=0;
for (String idStr : ids) {
int id=Integer.parseInt(idStr);
rows+=delete(id);
}
return rows;
}
public int update(Book entity) {
return bookdao.update(entity);
}
}
服务层不只是一个dao的接力棒,认为他可有可无,其实是因为我们现在的的示例中没有涉及到更多的复杂业务,所以显得比较空,实现开发可能有更多的业务逻辑要在这里处理。另外给bookdao成员变量注解为自动装配,service类注解为IOC组件。
为了确保服务类中的每个方法正确,先使用JUnit进行单元测试,测试代码如下:
package com.zhangguo.bookstore.test;
import static org.junit.Assert.*;
import java.util.Date;
import java.util.List;
import org.junit.BeforeClass;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.zhangguo.bookstore.entities.Book;
import com.zhangguo.bookstore.service.BookService;
public class TestBookService {
static BookService bookservice;
@BeforeClass
public static void before(){
ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
bookservice=ctx.getBean(BookService.class);
}
@Test
public void testGetAllBooks() {
List<Book> books=bookservice.getAllBooks();
assertNotNull(books);
}
@Test
public void testAdd() {
Book entity=new Book(0, "Hibernate 第七版", 78.1, new Date());
try {
assertEquals(1, bookservice.add(entity));
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void testDeleteInt() {
assertEquals(1, bookservice.delete(9));
}
@Test
public void testDeleteStringArray() {
String[] ids={"7","11","12"};
assertEquals(3, bookservice.delete(ids));
}
@Test
public void testUpdate() {
Book entity=new Book(7, "Hibernate 第二版", 79.1, new Date());
try {
assertEquals(1, bookservice.update(entity));
} catch (Exception e) {
e.printStackTrace();
}
}
@Test
public void testGetBookById()
{
assertNotNull(bookservice.getBookById(1));
}
@Test
public void testAddDouble(){
//因为书名相同,添加第二本会失败,用于测试事务
Book entity1=new Book(0, "Hibernate 第八版", 78.1, new Date());
Book entity2=new Book(0, "Hibernate 第八版", 78.1, new Date());
assertEquals(2, bookservice.add(entity1, entity2));
}
}
所有的测试均通过,有一个想法就是能否测试完成后数据库还原,如删除的数据在测试后不被真正删除。
9.1、修改web.xml文件,添加加载Spring容器用的监听器,修改后的结果如下:
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0" >
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<listener>
<description>Spring容器加载监听器</description>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<description>设置Spring加载时的配置文件位置,默认位置在web-inf/lib下</description>
<param-name>contextConfigLocation</param-name>
<param-value>classpath*:applicationContext.xml</param-value>
</context-param>
</web-app>
类org.springframework.web.context.ContextLoaderListener处在Spring-web.jar包中,要记得在pom.xml中添加依赖,测试是否加载成功的简单办法是:重新启动tomcat查看控制信息。
9.2、为了方便获得Spring容器实例,定义一个CtxUtil工具类,工具类的代码如下:
package com.zhangguo.bookstore.action;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;
/**
* Spring容器上下文工具类,用于获取当前的Spring容器
* 实现了接口ApplicationContextAware且该类被Spring管理
*则会自动调用setApplicationContext方法获取Spring容器对象
*/
@Component
public class CtxUtil implements ApplicationContextAware {
public static ApplicationContext ctx;
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
ctx=applicationContext;
}
/**
* 根据类型获得bean
*/
public static <T> T getBean(Class<T> clazz){
return ctx.getBean(clazz);
}
/**
* 根据名称名称获得bean
*/
public static Object getBean(String name){
return ctx.getBean(name);
}
}
为了实现一个简单的MVC基础控制器,定义了一个叫BaseController的Servlet,可以让其它的Servlet继承该Servlet获得部分MVC功能,具体代码如下:
package com.zhangguo.bookstore.action;
import java.io.IOException;
import java.lang.reflect.*;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet基类
* 自定义控制器基类
*/
public class BaseController extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf-8");
// 获得要执行的方法名
String act = request.getParameter("act");
// 如果用户没有提供方法名
if (act == null || act.equals("")) {
// 默认方法
act = "execute";
}
// 根据方法名获得方法信息获得方法信息
Method method;
try {
// 在对象中获得类型信息,在类型中获得方法通过方法名,与参数类型
method = this.getClass().getMethod(act, HttpServletRequest.class, HttpServletResponse.class);
// 调用方法,在当前对象中调用,传递参数request与response,获得返回结果
String targetUri = method.invoke(this, request, response) + "";
// 如果返回的url是以redirect开始,则是重定向
if (targetUri.startsWith("redirect:")) {
response.sendRedirect(targetUri.substring(9, targetUri.length()));
} else {
// 转发
request.getRequestDispatcher(targetUri).forward(request, response);
}
} catch (Exception e) {
response.sendError(400, e.getMessage());
e.printStackTrace();
}
}
public void execute(HttpServletRequest request, HttpServletResponse response) throws IOException {
response.sendError(400, "请使用参数act指定您要访问的方法");
}
}
该控制器继承BaseController,中间每一个参数为(HttpServletRequest request,HttpServletResponse response)的方法都充当一个Action,代码如下:
package com.zhangguo.bookstore.action;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.zhangguo.bookstore.entities.Book;
import com.zhangguo.bookstore.service.BookService;
@WebServlet("/BookController.do")
public class BookController extends BaseController {
private static final long serialVersionUID = 1L;
BookService bookservice;
@Override
public void init() throws ServletException {
bookservice = CtxUtil.getBean(BookService.class);
}
// 图书列表Action
public String ListBook(HttpServletRequest request, HttpServletResponse response) {
request.setAttribute("books", bookservice.getAllBooks());
return "ListBook.jsp";
}
// 删除图书Action
public String Delete(HttpServletRequest request, HttpServletResponse response) {
int id = Integer.parseInt(request.getParameter("id"));
request.setAttribute("message", bookservice.delete(id) > 0 ? "删除成功!" : "删除失败!");
request.setAttribute("books", bookservice.getAllBooks());
return "ListBook.jsp";
}
// 多删除图书Action
public String Deletes(HttpServletRequest request, HttpServletResponse response) {
String[] ids = request.getParameterValues("ids");
if (ids!=null&&ids.length > 0) {
request.setAttribute("message", bookservice.delete(ids) > 0 ? "删除成功!" : "删除失败!");
} else {
request.setAttribute("message", "请选择删除项!");
}
request.setAttribute("books", bookservice.getAllBooks());
return "ListBook.jsp";
}
// 添加图书Action
public String AddBook(HttpServletRequest request, HttpServletResponse response) {
return "AddBook.jsp";
}
// 保存添加图书Action
public String AddBookPost(HttpServletRequest request, HttpServletResponse response) {
try {
String title = request.getParameter("title");
double price = Double.parseDouble(request.getParameter("price"));
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date publishDate = simpleDateFormat.parse(request.getParameter("publishDate"));
Book entity = new Book(0, title, price, publishDate);
if (bookservice.add(entity) > 0) {
request.setAttribute("model", new Book());
request.setAttribute("message", "添加成功!");
} else {
request.setAttribute("model", entity);
request.setAttribute("message", "添加失败!");
}
} catch (Exception exp) {
request.setAttribute("message", exp.getMessage());
exp.printStackTrace();
}
return "AddBook.jsp";
}
//编辑图书Action
public String EditBook(HttpServletRequest request, HttpServletResponse response) {
int id = Integer.parseInt(request.getParameter("id"));
Book model=bookservice.getBookById(id);
request.setAttribute("model", model);
return "EditBook.jsp";
}
// 保存编辑图书Action
public String EditBookPost(HttpServletRequest request, HttpServletResponse response) {
try {
int id=Integer.parseInt(request.getParameter("id"));
String title = request.getParameter("title");
double price = Double.parseDouble(request.getParameter("price"));
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date publishDate = simpleDateFormat.parse(request.getParameter("publishDate"));
Book entity = new Book(id, title, price, publishDate);
request.setAttribute("message", bookservice.update(entity) > 0 ? "更新成功!" : "更新失败!");
request.setAttribute("model", entity);
} catch (Exception exp) {
request.setAttribute("message", exp.getMessage());
exp.printStackTrace();
}
return "EditBook.jsp";
}
}
定义视图ListBook.jsp,用于完成图书管理,实现图书的列表、删除与多删除功能,页面脚本如下:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link href="styles/main.css" type="text/css" rel="stylesheet" />
<title>图书管理</title>
</head>
<body>
<div class="main">
<h2 class="title"><span>图书管理</span></h2>
<form action="BookController.do?act=Deletes" method="post">
<table border="1" width="100%" class="tab">
<tr>
<th><input type="checkbox" id="chbAll"></th>
<th>编号</th>
<th>书名</th>
<th>价格</th>
<th>出版日期</th>
<th>操作</th>
</tr>
<c:forEach var="book" items="${books}">
<tr>
<th><input type="checkbox" name="ids" value="${book.id}"></th>
<td>${book.id}</td>
<td>${book.title}</td>
<td>${book.price}</td>
<td><fmt:formatDate value="${book.publishDate}" pattern="yyyy年MM月dd日"/></td>
<td>
<a href="BookController.do?act=Delete&id=${book.id}" class="abtn">删除</a>
<a href="BookController.do?act=EditBook&id=${book.id}" class="abtn">编辑</a>
</td>
</tr>
</c:forEach>
</table>
<p style="color: red">${message}</p>
<p>
<a href="BookController.do?act=AddBook" class="abtn">添加</a>
<input type="submit" value="删除选择项" class="btn"/>
</p>
</form>
</div>
</body>
</html>
运行时效果如下图所示:
定义页面AddBook.jsp完成添加图书功能,在控制器中有两个Action对应新增功能,一个是AddBook,完成页面展示;另一个是AddBookPost处理保存事件,页面脚本如下:
<%@ 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>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link href="styles/main.css" type="text/css" rel="stylesheet" />
<title>新增图书</title>
</head>
<body>
<div class="main">
<h2 class="title"><span>新增图书</span></h2>
<form action="BookController.do?act=AddBookPost" method="post">
<fieldset>
<legend>图书</legend>
<p>
<label for="title">图书名称:</label>
<input type="text" id="title" name="title" value="${model.title}"/>
</p>
<p>
<label for="title">图书价格:</label>
<input type="text" id="price" name="price" value="${model.price}"/>
</p>
<p>
<label for="title">出版日期:</label>
<input type="text" id="publishDate" name="publishDate" value="${model.publishDate}"/>
</p>
<p>
<input type="submit" value="保存" class="btn">
</p>
</fieldset>
</form>
<p style="color: red">${message}</p>
<p>
<a href="BookController.do?act=ListBook" class="abtn">返回列表</a>
</p>
</div>
</body>
</html>
运行成功时的状态如下:
定义页面EditBook.jsp完成更新图书功能,在控制器中有两个Action对应更新功能,一个是EditBook,完成页面展示与加载要编辑图书实体的信息;另一个是EditBookPost处理保存事件,页面脚本如下:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link href="styles/main.css" type="text/css" rel="stylesheet" />
<title>编辑图书</title>
</head>
<body>
<div class="main">
<h2 class="title"><span>编辑图书</span></h2>
<form action="BookController.do?act=EditBookPost" method="post">
<fieldset>
<legend>图书</legend>
<p>
<label for="title">图书名称:</label>
<input type="text" id="title" name="title" value="${model.title}"/>
</p>
<p>
<label for="title">图书价格:</label>
<input type="text" id="price" name="price" value="${model.price}"/>
</p>
<p>
<label for="title">出版日期:</label>
<input type="text" id="publishDate" name="publishDate" value="<fmt:formatDate value="${model.publishDate}" pattern="yyyy-MM-dd"/>"/>
</p>
<p>
<input type="hidden" id="id" name="id" value="${model.id}"/>
<input type="submit" value="保存" class="btn">
</p>
</fieldset>
</form>
<p style="color: red">${message}</p>
<p>
<a href="BookController.do?act=ListBook" class="abtn">返回列表</a>
</p>
</div>
</body>
</html>
运行时的状态如下所示:
定义index.jsp页面,让其转发到指定的控制器(有点类似路由功能了),页面代码如下:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<jsp:forward page="BookController.do?act=ListBook"></jsp:forward>
定义了一个简陋的样式main.css,样式表脚本如下:
@CHARSET "UTF-8";
* {
margin: 0;
padding: 0;
font-family: microsoft yahei;
font-size: 14px;
}
body {
padding-top: 20px;
}
.main {
width: 90%;
margin: 0 auto;
border: 1px solid #777;
padding: 20px;
}
.main .title {
font-size: 20px;
font-weight: normal;
border-bottom: 1px solid #ccc;
margin-bottom: 15px;
padding-bottom: 5px;
color: blue;
}
.main .title span {
display: inline-block;
font-size: 20px;
background : blue;
color: #fff;
padding: 0 8px;
background: blue;
}
a {
color: blue;
text-decoration: none;
}
a:hover {
color: orangered;
}
.tab td, .tab, .tab th {
border: 1px solid #777;
border-collapse: collapse;
}
.tab td, .tab th {
line-height: 26px;
height: 26px;
padding-left: 5px;
}
.abtn {
display: inline-block;
height: 20px;
line-height: 20px;
background: blue;
color: #fff;
padding: 0 5px;
}
.btn {
height: 20px;
line-height: 20px;
background: blue;
color: #fff;
padding: 0 8px;
border:0;
}
.abtn:hover,.btn:hover{
background: orangered;
color: #fff;
}
p{
padding:5px 0;
}
fieldset{
border: 1px solid #ccc;
padding:5px 10px;
}
fieldset legend{
margin-left:10px;
font-size:16px;
}
这个Demo起到了承前启后的作用,通过该示例将前面学习过的Spring IOC、MyBatis、JSP、Servlet、Maven及Spring整合MyBatis的内容进行巩固,也为后面学习Spring MVC作好了铺垫。示例中隐约的实现了一些MVC的功能,这远远不够,在URL的处理、表单验证、自动映射表单等方面还可以完善,只想有一个抛砖引玉的作用就满意了,谢谢您的阅读,谢谢!