项目实战三：ssh实现无限分类
本文实现了递归思路的无限分类，虽然递归效率比较低，但是应付一般的项目还是可以的，这里我直接贴代码说明
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"> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/beans.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>struts.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.devMode" value="true" />
<constant name="struts.multipart.maxSize" value="2147483648"/>
<constant name="struts.objectFactory" value="spring" />
<package name="index" namespace="/" extends="struts-default,json-default">
<action name="index" class="com.schoolaround.action.IndexAction" method="index">
<result>/admin/index.jsp</result>
</action>
</package>
<package name="shop" namespace="/" extends="struts-default,json-default">
<action name="shopcategory" class="com.schoolaround.action.ShopControlAction" method="shopcategory">
<result>/admin/shopcategory.jsp</result>
</action>
</package>
</struts>beasns.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: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-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<context:component-scan base-package="com.schoolaround.*"/>
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/schoolaround?useUnicode=true&characterEncoding=UTF-8"/>
<property name="user" value="root"/>
<property name="password" value="root"/>
<property name="initialPoolSize" value="3"/>
<property name="minPoolSize" value="5"/>
<property name="maxPoolSize" value="20"/>
<property name="maxIdleTime" value="120"/>
<property name="acquireIncrement" value="2"/>
<property name="idleConnectionTestPeriod" value="60"/>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<value>com/schoolaround/pojo/ShopCategory.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.hbm2ddl.auto=update
hibernate.show_sql=true
hibernate.format_sql=false
</value>
</property>
</bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<tx:annotation-driven transaction-manager="txManager"/>
</beans>
pojo
ShopCategory.hbm.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="com.schoolaround.pojo">
<class name="ShopCategory" table="shopcategory">
<id name="shopcategoryid" type="int">
<column name="shopcategoryid"/>
<generator class="increment" />
</id>
<property name="shopcategory" length="10"></property>
<property name="pid" length="10"></property>
</class>
</hibernate-mapping>
ShopCategory.java
package com.schoolaround.pojo;
public class ShopCategory {
private int shopcategoryid;
private String shopcategory;
private int pid;
public int getShopcategoryid() {
return shopcategoryid;
}
public void setShopcategoryid(int shopcategoryid) {
this.shopcategoryid = shopcategoryid;
}
public String getShopcategory() {
return shopcategory;
}
public void setShopcategory(String shopcategory) {
this.shopcategory = shopcategory;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
}
下面dao层和service层的代码就不贴出来了，我直接贴Action中是如何实现的
ShopControlAction.java
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.json.annotations.JSON;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import com.schoolaround.pojo.ShopCategory;
import com.schoolaround.service.ShopCategoryService;
@Controller
@Scope(value = "prototype")
public class ShopControlAction extends ActionSupport{
private String result = null;
private int shopcategoryid;
private String shopcategory;
private int pid;
private List categoryList = new ArrayList();
private List category = new ArrayList();
private ShopCategoryService shopcategoryService;
private List<ShopCategory> resultlist = new ArrayList<ShopCategory>();
public int getShopcategoryid() {
return shopcategoryid;
}
public void setShopcategoryid(int shopcategoryid) {
this.shopcategoryid = shopcategoryid;
}
public String getShopcategory() {
return shopcategory;
}
public void setShopcategory(String shopcategory) {
this.shopcategory = shopcategory;
}
public int getPid() {
return pid;
}
public void setPid(int pid) {
this.pid = pid;
}
public List<ShopCategory> getCategoryList() {
return categoryList;
}
public void setCategoryList(List<ShopCategory> categoryList) {
this.categoryList = categoryList;
}
public List getCategory() {
return category;
}
public void setCategory(List category) {
this.category = category;
}
public ShopCategoryService getShopcategoryService() {
return shopcategoryService;
}
@Resource
public void setShopcategoryService(ShopCategoryService shopcategoryService) {
this.shopcategoryService = shopcategoryService;
}
public String shopcategory() throws Exception{
List<ShopCategory> list = this.shopcategoryService.categoryList();//这里categoryList()为从数据库取出的分类表所有数据的list
this.category = genCate(list,0,0,"shopcategory");
return SUCCESS;
}
//这里是递归部分的实现，pid是上级分类，list是要递归的数据list，level是遍历的层级,keyword主要用于输出树状的格式，主要在分类名前面连接树状符号
public List<ShopCategory> genCate(List<ShopCategory> list, int pid, int level,String keyword)
{
if(level==10) return resultlist;
String l = "";
for(int i=0;i<level;i++){
l+=" ";
}
l=l+"└";
for(ShopCategory categorylist : list)
{
if(categorylist.getPid()==pid)
{
ShopCategory cate = new ShopCategory();
cate.setPid(categorylist.getPid());
cate.setShopcategoryid(categorylist.getShopcategoryid());
cate.setShopcategory(l+categorylist.getShopcategory());
resultlist.add(cate);
genCate(list,categorylist.getShopcategoryid(), level+1,keyword);
}
}
return resultlist;
}
}
shopcategory.jsp主要代码
<%@ page language="java" pageEncoding="utf-8"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<s:select list="category" name="pid" listKey="shopcategoryid" listValue="shopcategory"></s:select>
<form id="fm_shopcategory" method="post" novalidate>
<div class="fitem">
<label>上级分类:</label>
<s:select list="category" name="pid" listKey="shopcategoryid" listValue="shopcategory"></s:select>
</div>
<div class="fitem">
<label>类别名:</label>
<input name="shopcategory" class="easyui-validatebox" required="true">
</div>
</form>
这里我用到了easyui，可以自行更改成一般的form表单，那么基本上就大功告成了
虽然代码拙劣，但是却付出了心血，如果有转载的童鞋，请附上转载信息
作者：Hunter_first
本作品由Hunter_first创作。 欢迎转载，但任何转载必须保留完整文章，在显要地方显示署名以及原文链接。如您有任何疑问，请给我留言