MVC——08 菜单小项目

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#菜单小项目

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菜单小项目

1.创建数据库表

create table menu(
id int(10) primary key auto_increment,
name varchar(20),
pid int(10)
);

insert into menu values(default,'系统设置',0);
insert into menu values(default,'销售管理',0);
insert into menu values(default,'修改密码',1);
insert into menu values(default,'添加用户',1);
insert into menu values(default,'销售人员新增',2);
insert into menu values(default,'删除销售人员',2);

2.新建项目Web Project，取名为menu

3.导入jar包

在这里插入图片描述

4.配置WEB-INF下的web.xml

有四个标签

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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_3_0.xsd">
	<!-- 上下文参数 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:applicationContext.xml</param-value>
	</context-param>
	<!-- 监听器 -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- SpringMVC前端控制器 -->
	<servlet>
		<servlet-name>springmvc</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<param-name>contextConfigLocation</param-name>
			<param-value>classpath:springmvc.xml</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springmvc</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<!-- 字符编码过滤器 -->
	<filter>
		<filter-name>encoding</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>utf-8</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>encoding</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>

5.配置src下的全局配置文件spring和springmvc

spring的配置文件applicationContext.xml
注：spring扫描service，而springmvc扫描控制器
property name=“typeAliasesPackage” value="com.youdian.pojo"加载类型别名

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx" 
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd" default-autowire="byName">
    <!-- 注解扫描 -->
    <context:component-scan base-package="com.youdian.service.impl"></context:component-scan>
    <!-- 加载属性文件 -->
    <context:property-placeholder location="classpath:db.properties"/>
    <!-- 数据源 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    	<property name="driverClassName" value="${jdbc.driver}"></property>
    	<property name="url" value="${jdbc.url}"></property>
    	<property name="username" value="${jdbc.username}"></property>
    	<property name="password" value="${jdbc.password}"></property>
    </bean>
    <!-- SqlSessionFactory -->
    <bean id="factory" class="org.mybatis.spring.SqlSessionFactoryBean">
    	<property name="dataSource" ref="dataSource"></property>
    	<property name="typeAliasesPackage" value="com.youdian.pojo"></property>
    </bean>
    <!-- 扫描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    	<property name="basePackage" value="com.youdian.mapper"></property>
    	<property name="sqlSessionFactoryBeanName" value="factory"></property>
    </bean>
    <!-- 事务管理器 -->
    <bean id="txManage" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    	<property name="dataSource" ref="dataSource"></property>
    </bean>
    <!-- 声明式事务 -->
    <tx:advice id="txAdvice" transaction-manager="txManage">
    	<tx:attributes>
    		<tx:method name="ins*"/>
    		<tx:method name="del*"/>
    		<tx:method name="upd*"/>
    		<tx:method name="*" read-only="true"/>
    	</tx:attributes>
    </tx:advice>
    <!-- 配置aop -->
    <aop:config>
    	<aop:pointcut expression="execution(* com.youdian.service.impl.*.*(..))" id="mypoint"/>
    	<aop:advisor advice-ref="txAdvice" pointcut-ref="mypoint"/>
    </aop:config>
</beans>

注：基于通知需要配置AOP
其中需要加载属性文件db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url = jdbc:mysql://localhost:3306/sum
jdbc.username = root
jdbc.password =root

springmvc的配置文件springmvc.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:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	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.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!-- 扫描直接,只扫描controller包 -->
    <context:component-scan base-package="com.youdian.controller"></context:component-scan>
    <!-- 注解驱动,注册HandlerMapping和HandlerAdapter -->
    <mvc:annotation-driven></mvc:annotation-driven>
    <!-- 设置静态资源 -->
    <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>
    <mvc:resources location="/css/" mapping="/css/**"></mvc:resources>
    <mvc:resources location="/images/" mapping="/images/**"></mvc:resources>
    <!-- 视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    	<property name="prefix" value="/"></property>
    	<property name="suffix" value=".jsp"></property>
    </bean>
</beans>

至此环境搭建完成

6.新建实体类

com.youdian.pojo包下的菜单类中生成get和set方法

public class Menu {
	private int id;
	private String name;
	private int pid;
	private List<Menu> children;
}

7.新建mapper层

public interface MenuMapper {
	List<Menu> selByPid(int pid);
}

ResultMap需要用注解或者配置文件方式
配置文件MenuMapper.xml

<?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">
<mapper namespace="com.youdian.mapper.MenuMapper">
	<resultMap type="menu" id="mymap">
		<id property="id" column="id"/>
		<collection property="children" select="com.youdian.mapper.MenuMapper.selByPid" column="id"></collection>
	</resultMap>
	<select id="selByPid" parameterType="int" resultMap="mymap">
		select * from menu where pid=#{0}
	</select>
</mapper>

8.新建service接口

public interface MenuService {
	List<Menu> show();
}

9.新建service接口实现类

开发用注解开发，最上面加入@Service

@Service
public class MenuServiceImpl implements MenuService {
	@Resource
	private MenuMapper menuMapper;

	@Override
	public List<Menu> show() {
		return menuMapper.selByPid(0);
	}
}

10.新建controller类

@Controller表示把当前类交给springmvc管理
@Resource默认ByName进行注入

MenuServiceImpl和MenuController
springmvc容器调用spring容器中内容

@Controller
public class MenuController {
	/**
	 * springmvc容器调用spring容器中内容
	 */
	@Resource
	private MenuService menuServiceImpl;
	
	@RequestMapping("show")
	@ResponseBody
	public List<Menu> show(){
		return menuServiceImpl.show();
	}
}

11.新建WebContent下的jsp

新建一个js文件夹，放入jquery库
jquery1.7中有效果
cursor有多种值

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!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>Insert title here</title>
<script type="text/javascript" src="js/jquery-1.7.2.js"></script>
<script type="text/javascript">
$(function(){
	$.post("show",function(data){
		var result ="";
		for(var i=0;i<data.length;i++){
			result+="<dl>";
			result+="<dt style='cursor:pointer'>"+data[i].name+"</dt>";
			for(var j=0;j<data[i].children.length;j++){
				result+="<dd>"+data[i].children[j].name+"</dd>";
			}
			result+="</dl>";
		}
		$("body").html(result);
	});
	
	//对所有父菜单添加点击事件 
	//live("事件名,多个事件使用空格分割",function(){})
	$("dt").live("click",function(){
		//slow normal fast 数值
		$(this).siblings().slideToggle(1000);
	});
	
})
</script>
</head>
<body>

</body>
</html>