第二十讲：ExtJS与Struts 2框架整合

短命女 2022-03-27 14:10 154阅读 0赞

一、 XML与JSON的生成

示例一：将Java对象转换成XML数据

示例二：将Java对象集合转换成XML数据

<table style="width:426.1pt;"> 
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 <td style="vertical-align:top;width:426.1pt;"> package com.ibeifeng.xstream; &nbsp; import java.util.ArrayList; import java.util.List; &nbsp; import com.thoughtworks.xstream.XStream; import com.thoughtworks.xstream.io.xml.DomDriver; &nbsp; public class TestXStreamList { public static void main(String[] args) { List&lt;Person&gt; persons = new ArrayList&lt;Person&gt;(); Person person1 = new Person(); person1.setName("张三"); person1.setAge(20); person1.setSex(true); &nbsp; Person person2 = new Person(); person2.setName("李四"); person2.setAge(30); person2.setSex(false); &nbsp; persons.add(person1); persons.add(person2); &nbsp; DomDriver domDriver = new DomDriver(); XStream xtream = new XStream(domDriver); xtream.alias("person", Person.class); String xml = xtream.toXML(persons); System.out.println(xml); } } </td> 
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实例三：将Java对象转换成JSON对象

示例四：将Java对象集合转换成JSON对象数组

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 <td style="vertical-align:top;width:426.1pt;"> package&nbsp;com.ibeifeng.jsonlib; &nbsp; import&nbsp;java.util.ArrayList; import&nbsp;java.util.List; &nbsp; import&nbsp;net.sf.json.JSONArray; &nbsp; import&nbsp;com.ibeifeng.xstream.Person; &nbsp; public&nbsp;class&nbsp;TestJsonlibList { public&nbsp;static&nbsp;void&nbsp;main(String[] args) { List&lt;Person&gt; persons = new&nbsp;ArrayList&lt;Person&gt;(); Person person1 = new&nbsp;Person(); person1.setName("张三"); person1.setAge(20); person1.setSex(true); &nbsp; Person person2 = new&nbsp;Person(); person2.setName("李四"); person2.setAge(30); person2.setSex(false); &nbsp; persons.add(person1); persons.add(person2); &nbsp; JSONArray jsonObjects&nbsp;= JSONArray.fromObject(persons); System.out.println(jsonObjects.toString()); } } &nbsp; </td> 
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二、ExtJS和Struts 2框架整合。

1.添加Struts 2所需JAR包。

2.导入Struts 2的JSON插件JAR包。

3.在web.xml文件中添加Struts 2监听器。

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 <td style="vertical-align:top;width:426.1pt;"> &nbsp; &nbsp;&nbsp;&lt;!--定义核心Filter FilterDispatcher --&gt; &lt;filter&gt; &lt;!-- 定义核心Filter的名称 --&gt; &lt;filter-name&gt;struts2&lt;/filter-name&gt; &lt;!--定义核心Filter的实现类 --&gt; &lt;filter-class&gt; org.apache.struts2.dispatcher.FilterDispatcher &lt;/filter-class&gt; &lt;/filter&gt; &nbsp; &lt;filter-mapping&gt; &lt;!--核心Filter的名称 --&gt; &lt;filter-name&gt;struts2&lt;/filter-name&gt; &lt;!--使用该核心Filter来接受所有的Web请求 --&gt; &lt;url-pattern&gt;/*&lt;/url-pattern&gt; &lt;/filter-mapping&gt; </td> 
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4.添加Action。

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 <td style="vertical-align:top;width:426.1pt;"> package&nbsp;com.ibeifeng.action; &nbsp; import&nbsp;java.util.ArrayList; import&nbsp;java.util.List; &nbsp; import&nbsp;com.ibeifeng.xstream.Person; import&nbsp;com.opensymphony.xwork2.ActionSupport; &nbsp; public&nbsp;class&nbsp;GetPerson extends&nbsp;ActionSupport { List&lt;Person&gt; persons; &nbsp; public&nbsp;List&lt;Person&gt; getPersons() { return&nbsp;persons; } &nbsp; public&nbsp;void&nbsp;setPersons(List&lt;Person&gt; persons) { this.persons&nbsp;= persons; } &nbsp; public&nbsp;String&nbsp;execute() throws&nbsp;Exception { persons&nbsp;= new&nbsp;ArrayList&lt;Person&gt;(); Person person1 = new&nbsp;Person(); person1.setName("张三"); person1.setAge(20); person1.setSex(true); &nbsp; Person person2 = new&nbsp;Person(); person2.setName("李四"); person2.setAge(30); person2.setSex(false); &nbsp; persons.add(person1); persons.add(person2); return&nbsp;SUCCESS; } &nbsp; } &nbsp; </td> 
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5.配置Action。

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 <td style="vertical-align:top;width:426.1pt;"> &lt;?xml version="1.0" encoding="UTF-8" ?&gt; &nbsp; &lt;!DOCTYPE struts PUBLIC &nbsp;&nbsp;&nbsp;&nbsp;"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" &nbsp;&nbsp;&nbsp;&nbsp;"http://struts.apache.org/dtds/struts-2.0.dtd"&gt; &nbsp; &lt;struts&gt; &nbsp; &lt;package name="struts2" extends="json-default"&gt; &lt;action name="getPerson" class="com.ibeifeng.action.GetPerson"&gt; &lt;result type="json"/&gt; &lt;/action&gt; &lt;/package&gt; &lt;/struts&gt; </td> 
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