ztree异步加载
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Ztree异步加载的意思就是: 当点击展开树节点时,才去请求后台action返回点击节点的子节点数据并加载。
直接贴代码(SpringMvc+Mybatis):
前台页面ztreeList.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>Ztree</title> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="this is my page"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" type="text/css" href="<%=request.getContextPath()%>/css/zTreeStyle.css"> <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery-1.9.1.min.js"></script> <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery.ztree.core.js"></script> <script type="text/javascript" src="<%=request.getContextPath()%>/js/jquery.ztree.excheck.min.js"></script> <script type="text/javascript"> /** *异步加载的意思就是: 当点击展开树节点时, *才去请求后台action返回点击节点的子节点 *数据并加载。 */ var setting = { data : { key:{ name:"catalogName" }, simpleData : { enable : true, idKey:"catalogId", pIdKey:"parentId", } }, async : { enable : true, url : "ztree/list.ht", autoParam : [ "catalogId", "catalogName" ], dataFilter : filter //异步返回后经过Filter }, callback : { // beforeAsync: zTreeBeforeAsync, // 异步加载事件之前得到相应信息 OnAsyncSuccess : zTreeOnAsyncSuccess,//异步加载成功的fun aOnAsyncError : zTreeOnAsyncError, //加载错误的fun beforeClick : beforeClick,//捕获单击节点之前的事件回调函数 onRightClick: zTreeOnRightClick } }; //treeId是treeDemo,异步加载完之后走这个方法 function filter(treeId, parentNode, childNodes) { if (!childNodes) return null; childNodes = eval(childNodes); return childNodes; } //点击节点触发事件 function beforeClick(treeId, treeNode) { if (!treeNode.isParent) { alert("请选择父节点"); return false; } else { return true; } } //异步加载失败走该方法 function zTreeOnAsyncError(event, treeId, treeNode) { alert("异步加载失败!"); } //异步加载成功走该方法 function zTreeOnAsyncSuccess(event, treeId, treeNode, msg) { } //右击事件 function zTreeOnRightClick(){ alert("asdas"); } /**********当你点击父节点是,会异步访问controller,把id传过去*************/ var zNodes = []; $(document).ready(function() { $.fn.zTree.init($("#treeDemo"), setting, zNodes); }); </script> </head> <body> <div style="height:600px; width:98%"> <div style="height:600px; width:20%; border:1px solid #999999; float:left"> <ul id="treeDemo" class="ztree"></ul> </div> <div style="height:600px; width:79.5%; border:1px solid #999999; float:left; overflow:auto"> <iframe id="testIframe" name="testIframe" frameborder=0 scrolling=auto width=90% height=580px src="ztree/welcome.ht"></iframe> </div> </div> </body> </html>
后台逻辑处理ZtreeController.java:
package com.henu.controller; import java.io.PrintWriter; import java.util.List; import javax.annotation.Resource; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import net.sf.json.JSONArray; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import com.henu.model.Ztree; import com.henu.service.ZtreeService; @Controller @RequestMapping("/ztree/") public class ZtreeController { @Resource private ZtreeService ztreeService; @RequestMapping("page") public String page(){ return "ztree/ztreeList"; } @RequestMapping("welcome") public String welcome(){ return "ztree/welcome"; } @RequestMapping("list") public void list(HttpServletRequest request, HttpServletResponse response) throws Exception{ String catalogIdParam = request.getParameter("catalogId"); Long catalogId = null; if (catalogIdParam != null) { catalogId = Long.parseLong(catalogIdParam); } String catalogName = request.getParameter("catalogName"); System.out.println(catalogId + "|" + catalogName + "|"); List<Ztree> ztreeList = ztreeService.getZtree(catalogId); PrintWriter out = response.getWriter(); String str = JSONArray.fromObject(ztreeList).toString(); System.out.println(str); out.print(str); } }
Service层ZtreeService.java:
package com.henu.service; import java.util.List; import com.henu.model.Ztree; public interface ZtreeService { List<Ztree> getZtree(Long catalogId); }
ServiceImpl层ZtreeServiceImpl.java:
package com.henu.service.impl; import java.util.List; import javax.annotation.Resource; import org.springframework.stereotype.Service; import com.henu.dao.ZtreeDAO; import com.henu.model.Ztree; import com.henu.service.ZtreeService; @Service public class ZtreeServiceImpl implements ZtreeService{ @Resource private ZtreeDAO ztreeDAO; public List<Ztree> getZtree(Long catalogId) { return ztreeDAO.getZtree(catalogId); } }
持久层ZtreeDAO:
package com.henu.dao; import java.util.List; import javax.annotation.Resource; import org.mybatis.spring.SqlSessionTemplate; import org.springframework.stereotype.Component; import com.henu.model.Ztree; @Component public class ZtreeDAO { @Resource private SqlSessionTemplate sqlSessionTemplate; public List<Ztree> getZtree(Long catalogId) { List<Ztree> ztreeList = sqlSessionTemplate.selectList("com.henu.model.Ztree.getZtree",catalogId); return ztreeList; } }
Ztree.map.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"> <!-- 为这个mapper指定一个唯一的namespace,namespace的值习惯上设置成包名+sql映射文件名,这样就能够保证namespace的值是唯一的 例如namespace="com.henu.mapping.userMapper"就是com.henu.mapping(包名)+userMapper(userMapper.xml文件去除后缀) --> <mapper namespace="com.henu.model.Ztree"> <select id="getZtree" resultType="com.henu.model.Ztree"> select * from henu_catalog where 1=1 <if test="_parameter!=null and _parameter!=‘‘ "> and parentId = #{_parameter,jdbcType=NUMERIC} </if> <if test="_parameter == null "> and parentId = 1 </if> order by catalogId </select> </mapper>
application-context.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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:mvc="http://www.springframework.org/schema/mvc" 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-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd"> <context:property-placeholder location="classpath:*.properties"/> <!-- 注解扫描包 --> <context:component-scan base-package="com.henu" /> <!-- 开启注解 --> <mvc:annotation-driven /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driverClassName}"/> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="maxActive" value="20" /> <property name="initialSize" value="5" /> <property name="maxWait" value="60000" /> <property name="maxIdle" value="14"/> <property name="minIdle" value="5" /> </bean> <!-- spring和MyBatis完美整合,不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 自动扫描mapping.xml文件 --> <property name="mapperLocations" value="classpath:com/henu/mapping/*.xml"></property> </bean> <!-- 配置sqlsession 产生这个实例就是通过 sqlsessionTemplate来实现的 --> <bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate"> <constructor-arg index="0" ref="sqlSessionFactory" /> </bean> <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置事务的传播特性 --> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED"/> <tx:method name="save*" propagation="REQUIRED"/> <tx:method name="del*" propagation="REQUIRED"/> <tx:method name="update*" propagation="REQUIRED"/> <tx:method name="modify*" propagation="REQUIRED"/> <tx:method name="*" read-only="false"/> </tx:attributes> </tx:advice> <!-- 那些类的哪些方法参与事务 --> <aop:config> <aop:pointcut id="allServiceMethod" expression="(execution(* com.henu.*.service.impl.*.*(..))) or (execution (* com.henu.*.*.service.impl.*.*(..)))"/> <aop:advisor pointcut-ref="allServiceMethod" advice-ref="txAdvice"/> </aop:config> </beans>
spring-mvc.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:mvc="http://www.springframework.org/schema/mvc" 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-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"> <!-- 注解扫描包 --> <context:component-scan base-package="com.henu" /> <!-- 开启注解 --> <mvc:annotation-driven /> <!-- 静态资源(js/image)的访问 --> <mvc:resources location="/js/" mapping="/js/**"/> <mvc:resources location="/css/" mapping="/css/**"/> <mvc:resources location="/images/" mapping="/images/**"/> <!-- 定义视图解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/view/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- 启动Spring MVC的注解功能,完成请求和注解POJO的映射 处理ajax请求加入--> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="cacheSeconds" value="0"/> <property name="messageConverters"> <list> <bean class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"></bean> </list> </property> </bean> <!-- SpringMVC上传文件时,需要配置MultipartResolver处理器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="utf-8" /> <property name="maxUploadSize" value="10485760000" /> <property name="maxInMemorySize" value="40960" /> </bean> </beans>
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"> <welcome-file-list> <welcome-file>ztree/page</welcome-file> </welcome-file-list> <!-- 加载所有的配置文件,如果配置文件放在src下面则用classpath:application-context.xml --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/config/application-context.xml</param-value> </context-param> <!-- 配置Spring监听 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 配置SpringMVC --> <servlet> <servlet-name>springMVC</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/config/spring-mvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>*.ht</url-pattern> </servlet-mapping> <servlet-mapping> <servlet-name>springMVC</servlet-name> <url-pattern>/ztree/page</url-pattern> </servlet-mapping> <!-- 配置字符集 --> <filter> <filter-name>encodingFilter</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> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>encodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 配置Session --> <!-- <filter> <filter-name>openSession</filter-name> <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>openSession</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> --> </web-app>
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