一：介绍
SSM框架是目前比较流行的软件开发使用方案。对于三个框架的整合，主要需要配置web.xml，applicationContext.xml，springmvc.xml
二：web.xml的配置
web.xml的配置主要有四个地方。
1.上下文参数：声明应用范围内的初始化参数。
<!-- 上下文参数 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>2.监听器：支持事件监听程序类。
<!-- 监听器 -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>3.前端控制器：配置springmvc的前段控制器，并配置在初始化参数。
<!-- SpringMVC前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servletclass>
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>4.字符编码过滤器
<!-- 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>下面给出测试项目的完整的web.xml
<?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>三：applicationContext.xml的配置
<?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.bjsxt.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.bjsxt.pojo"></property>
</bean>
<!-- 扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bjsxt.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.bjsxt.service.impl.*.*(..))" id="mypoint"/>
<aop:advisor advice-ref="txAdvice" pointcut-ref="mypoint"/>
</aop:config>
</beans>四：springmvc.xml的配置
<?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.bjsxt.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>五：编写项目demo的代码
1.创建实体类
package com.ustc.pojo;
import java.util.List;
public class Menu {
private int id;
private String name;
private int pid;
private List<Menu> children;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
public List<Menu> getChildren() {
return children;
}
public void setChildren(List<Menu> children) {
this.children = children;
}
}
2.完成对应的mapper类和对应的xml（这里采取配置方法）
package com.ustc.mapper;
import java.util.List;
import com.ustc.pojo.Menu;
public interface MenuMapper {
List<Menu> selByPid(int pid);
}
<?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.ustc.mapper.MenuMapper">
<resultMap type="menu" id="mymap">
<id property="id" column="id"/>
<collection property="children" select="com.ustc.mapper.MenuMapper.selByPid" column="id"></collection>
</resultMap>
<select id="selByPid" parameterType="int" resultMap="mymap">
select *from menu where pid=#{0}
</select>
</mapper>在这里犯了漏写namespace，将resultmap写成了parameterType的错误，注意书写规范，明确各个标签的含义。
3.实现对应的service和其实现
package com.ustc.service;
import java.util.List;
import com.ustc.pojo.Menu;
public interface MenuService {
List<Menu> show();
}
package com.ustc.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.ustc.mapper.MenuMapper;
import com.ustc.pojo.Menu;
import com.ustc.service.MenuService;
@Service
public class MenuServiceImpl implements MenuService{
@Resource
private MenuMapper menuMapper;
@Override
public List<Menu> show() {
// TODO Auto-generated method stub
return menuMapper.selByPid(0);
}
}
这里讲一讲几个注解的意思。
@Service：带了@Service注解，将自动注册到Spring容器，不需要再在applicationContext.xml文件定义bean了。当然这个作用不是这个标签的主要作用。下面拿上面的实例代码来讲解意思，@Service注解是告诉Spring，当Spring要创建MenuServiceImpl的实例时，bean的名字必须叫做MenuService，这样当Action需要使用MenuServiceImpl的的实例时,就可以由Spring创建好的"menuService"，然后注入给Action。
@Resource:@Resource默认按照ByName自动注入，由J2EE提供，需要导入包javax.annotation.Resource。@Resource有两个重要的属性：name和type，而Spring将@Resource注解的name属性解析为bean的名字，而type属性则解析为bean的类型。
4.实现对应的controller
package com.ustc.controller;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.ustc.pojo.Menu;
import com.ustc.service.MenuService;
@Controller
public class MenuController {
@Resource
private MenuService menuServiceImpl;
@RequestMapping("show")
@ResponseBody
public List<Menu> show(){
return menuServiceImpl.show();
}
}
这里也对几个注解作一定的解释：
@Controller：用于标记在一个类上，使用它标记的类就是一个SpringMVC Controller 对象。分发处理器将会扫描使用了该注解的类的方法。通俗来说，被Controller标记的类就是一个控制器，这个类中的方法，就是相应的动作。
@RequestMapping:是一个用来处理请求地址映射的注解，可用于类或方法上。如图中所示配置，若请求为show，则调用该方法。
@ResponseBody：在方法上只有@RequestMapping 时,无论方法返回值是什么认为需要跳转。而在方法上添加 @ResponseBody则恒不跳转
六：创建jsp界面
<%@ 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>七：源码地址
https://download.youkuaiyun.com/download/ly20160520/11014756
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