關於Xwork的配置對象和XWork第一個程序

 

XWork2中的配置主要是有以下幾個類完成：

ConfigurationManager

Configuration

ConfigurationProvider

其中：Configuration和ConfigurationProvider是兩個接口。

 

ConfigurationManager：

是XWork2配置的核心， 它支持ConfigurationProvider的動態加入，進而可以生成自設定的Configuration。通常情況下，實例化一個ConfigurationManager來完成XWork2的應用。

 

ConfigurationProvider:

ConfigurationProvider的作用是對配置Configuration對象進行支持、幫助，將該Configuration對象擁有那些Action、Result對象是如何和Action映射、使用了那些Interceptors以及它們和Action的映射關係等信息提供給Configuration對象。XWork2的默認的ConfigurationProvider是XmlConfigurationProvider, 該Provider通過參數中指定的XML文件包含的信息來配置Configuration對象。

 

Configuration:

Configuration 是一個典型的值對象， 它包含了配置的信息， 對於每個ConfigurationManager,僅對應於一個Configuration接口的實例， 它被傳遞個每一個Provider，每個Provider將自己存儲的配置信息賦給Configuration對象。

    ConfigurationManager confManager = new ConfigurationManager();

    confManager.setConfiguration(new MyCustomConfiguration(...));

 

第一個XWork程序

 

XWork的配置文件xwork-hello-world.xml：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE xwork PUBLIC

 "-//OpenSymphony Group//XWork 1.1.1//EN"

 "http://www.opensymphony.com/xwork/xwork-1.1.1.dtd">

<xwork>

 <include file="xwork-default.xml" />

 <package name="default-hello-world" extends="xwork-default" namespace="/helloWorld">

  <result-types>

   <result-type name="printToConsole" class="example.helloworld.PrintToConsoleResult" />

  </result-types>

  

  <action name="helloWorld" class="example.helloworld.HelloWorldAction">

   <result type="printToConsole">

    <param name="param">${message}</param>

   </result>

  </action>

 </package>

</xwork>

啓動程序：

package example.helloworld;

package example.helloworld;

 

import java.util.LinkedHashMap;

import com.opensymphony.xwork2.ActionProxy;

import com.opensymphony.xwork2.ActionProxyFactory;

import com.opensymphony.xwork2.config.Configuration;

import com.opensymphony.xwork2.config.ConfigurationManager;

import com.opensymphony.xwork2.config.providers.XWorkConfigurationProvider;

import com.opensymphony.xwork2.config.providers.XmlConfigurationProvider;

/**

 * @author Jackie

 *

 */

public class HelloWorldTutorial {

 public static void main(String[] args) throws Exception {

   ConfigurationManager confManager = new ConfigurationManager();

   //將自己定義xwork配置加入到Configuration Manager

   confManager.addContainerProvider(

     new XmlConfigurationProvider(

       "example/helloworld/xwork-hello-world.xml",

      true));

   //將xwork的默認xml配置加入到Configuration Provider

   confManager.addContainerProvider(new XWorkConfigurationProvider());

   //得到Configuration對象

   Configuration conf = confManager.getConfiguration();

   ActionProxyFactory actionProxyFactory = conf.getContainer().getInstance(ActionProxyFactory.class);

   ActionProxy actionProxy = actionProxyFactory.createActionProxy(

     "/helloWorld", "helloWorld", null, new LinkedHashMap());

   

  

   actionProxy.execute();

 }

}

 

HelloWorldAction.java

 

package example.helloworld;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import com.opensymphony.xwork2.ActionSupport;

/**

 * @author Jackie

 *

 */

public class HelloWorldAction extends ActionSupport{

 private static final long serialVersionUID = 6874543345469426109L;

 private static final Log _log = LogFactory.getLog(HelloWorldAction.class);

 

 private String message ;

 public String getMessage() {

  return message;

 }

 public void setMessage(String message) {

  this.message = message;

 }

 

 public String execute() {

  _log.debug("execute...");

  message = "Hello World";

  return SUCCESS;

 }

 

 

}

HelloWorldAction對應的Result：

package example.helloworld;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import com.opensymphony.xwork2.ActionInvocation;

import com.opensymphony.xwork2.Result;

import com.opensymphony.xwork2.util.TextParseUtil;

/**

 * @author Jackie

 *

 */

public class PrintToConsoleResult implements Result{

 private static final Log _log = LogFactory.getLog(PrintToConsoleResult.class);

 

 private static final long serialVersionUID = -6173326554804520601L;

  private String param = "whatsoever";

  

  public void setParam(String param) { this.param = param; }

  public String getParam() { return this.param; }

 @Override

 public void execute(ActionInvocation invocation) throws Exception {

  _log.debug("execute...");

  String result = TextParseUtil.translateVariables(param, invocation.getStack());

  System.out.println(result);

 }

}

參考：

Xwork的doc文檔 http://wiki.opensymphony.com/display/XW/XWork2+Hello+World+Tutorial