第二十讲：ExtJS与Struts 2框架整合

最新推荐文章于 2020-02-14 18:14:52 发布

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最新推荐文章于 2020-02-14 18:14:52 发布

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分类专栏： EXTJS

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本文详细介绍了如何使用Java将对象转换为XML和JSON格式，包括单个对象和对象集合的转换。此外，还阐述了ExtJS与Struts2框架的整合过程，涉及配置、Action创建及JSON结果返回。

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一、 XML与JSON的生成

示例一：将Java对象转换成XML数据

package com.ibeifeng.xstream;

import com.thoughtworks.xstream.XStream;

import com.thoughtworks.xstream.io.xml.DomDriver;

public class TestXStream {

public static void main(String[] args) {

Person person = new Person();

person.setName("张三");

person.setAge(20);

person.setSex(true);

DomDriver domDriver = new DomDriver();

XStream xtream = new XStream(domDriver);

xtream.alias("person", Person.class);

String xml = xtream.toXML(person);

System.out.println(xml);

}

示例二：将Java对象集合转换成XML数据

package com.ibeifeng.xstream;

import java.util.ArrayList;

import java.util.List;

import com.thoughtworks.xstream.XStream;

import com.thoughtworks.xstream.io.xml.DomDriver;

public class TestXStreamList {

public static void main(String[] args) {

List<Person> persons = new ArrayList<Person>();

Person person1 = new Person();

person1.setName("张三");

person1.setAge(20);

person1.setSex(true);

Person person2 = new Person();

person2.setName("李四");

person2.setAge(30);

person2.setSex(false);

persons.add(person1);

persons.add(person2);

DomDriver domDriver = new DomDriver();

XStream xtream = new XStream(domDriver);

xtream.alias("person", Person.class);

String xml = xtream.toXML(persons);

System.out.println(xml);

}

实例三：将Java对象转换成JSON对象

package com.ibeifeng.jsonlib;

import net.sf.json.JSONObject;

import com.ibeifeng.xstream.Person;

public class TestJsonlib {

public static void main(String[] args) {

Person person = new Person();

person.setName("张三");

person.setAge(20);

person.setSex(true);

JSONObject jsonObject = JSONObject.fromObject(person);

System.out.println(jsonObject.toString());

}

示例四：将Java对象集合转换成JSON对象数组

package com.ibeifeng.jsonlib;

import java.util.ArrayList;

import java.util.List;

import net.sf.json.JSONArray;

import com.ibeifeng.xstream.Person;

public class TestJsonlibList {

public static void main(String[] args) {

List<Person> persons = new ArrayList<Person>();

Person person1 = new Person();

person1.setName("张三");

person1.setAge(20);

person1.setSex(true);

Person person2 = new Person();

person2.setName("李四");

person2.setAge(30);

person2.setSex(false);

persons.add(person1);

persons.add(person2);

JSONArray jsonObjects = JSONArray.fromObject(persons);

System.out.println(jsonObjects.toString());

}

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。

<filter-name>struts2</filter-name>

<filter-class>

org.apache.struts2.dispatcher.FilterDispatcher

</filter-class>

</filter>

<filter-mapping>

<filter-name>struts2</filter-name>

<url-pattern>/*</url-pattern>

</filter-mapping>

4.添加Action。

package com.ibeifeng.action;

import java.util.ArrayList;

import java.util.List;

import com.ibeifeng.xstream.Person;

import com.opensymphony.xwork2.ActionSupport;

public class GetPerson extends ActionSupport {

List<Person> persons;

public List<Person> getPersons() {

return persons;

}

public void setPersons(List<Person> persons) {

this.persons = persons;

}

public String execute() throws Exception {

persons = new ArrayList<Person>();

Person person1 = new Person();

person1.setName("张三");

person1.setAge(20);

person1.setSex(true);

Person person2 = new Person();

person2.setName("李四");

person2.setAge(30);

person2.setSex(false);

persons.add(person1);

persons.add(person2);

return SUCCESS;

}

5.配置Action。

<?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">

</action>

</package>

</struts>