这个程序的实现原理问题，请您回答的越详细越好！万分感谢

Question

（2）配置文件说明

applicationContext.xml文件的内容如下：

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

xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

services.xml文件的内容如下：

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

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:jaxws="http://cxf.apache.org/jaxws"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">

address="/HelloWorld" implementor="com.cxf.test.interfaces.HelloWorldImpl"/>

web.xml文件的内容如下：

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



cxfservice



contextConfigLocation

WEB-INF/classes/applicationContext.xml







org.springframework.web.context.ContextLoaderListener







CXFServlet



org.apache.cxf.transport.servlet.CXFServlet







CXFServlet

/services/*

3）发布的HelloWord服务说明

要发布的HelloWorld服务的接口定义文件com.cxf.test.interfaces.HelloWorld：

package com.cxf.test.interfaces;

import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;

@WebService
public interface HelloWorld
{
/*

• 一个简单的方法,返回一个字符串
• @param hello

• @return
  */
  String say(String hello);

  /**

• 稍微复杂一些的方法,传递一个对象给服务端处理

• @param user

• @return
  */
  String sayUserName(@WebParam(name = "user") UserDTO user);

  /**

• 最复杂的方法,返回一个List封装的对象集合

• @return
  */
  public @WebResult(partName = "o") ListObject findUsers();
  }

  要发布的HelloWorld服务的接口实现类com.cxf.test.interfaces.HelloWorldImpl：

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package com.cxf.test.interfaces;

import java.util.ArrayList;

import javax.jws.WebService;

/**

• @author zhangzk
  
• /
  /*
  
• WebService实现类.
  
• 
  

• 使用@WebService指向Interface定义类即可.
  
  */
  
  @WebService(endpointInterface = "com.cxf.test.interfaces.HelloWorld")
  
  public class HelloWorldImpl implements HelloWorld
  
  {
  
  public String sayUserName(UserDTO user)
  
  {
  
  return "hello " + user.getName();
  
  }

  public String say(String hello)
  
  {
  
  return "hello " + hello;
  
  }

  public ListObject findUsers()
  
  {
  
  ArrayList list = new ArrayList();

  list.add(instancUser(1, "lib"));   
  list.add(instancUser(2, "mld"));   
  list.add(instancUser(3, "lq"));   
  list.add(instancUser(4, "gj"));   
  ListObject o = new ListObject();   
  o.setList(list);   
  return o;   
  

  }

  private UserDTO instancUser(Integer id, String name)
  
  {
  
  UserDTO user = new UserDTO();
  
  user.setId(id);
  
  user.setName(name);
  
  return user;
  
  }
  
  }
  
  findUsers()接口返回的参数对象定义文件com.cxf.test.interfaces.ListObject：

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package com.cxf.test.interfaces;

import java.util.ArrayList;

import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "listObject", propOrder ={ "list" })

public class ListObject

{

@XmlElement(nillable = true)

protected List list;

/**  
 * Gets the value of the list property.  
 *   
 * <p>  
 * This accessor method returns a reference to the live list, not a snapshot. Therefore any modification you make to the returned list will be  
 * present inside the JAXB object. This is why there is not a <CODE>set</CODE> method for the list property.  
 *   
 * <p>  
 * For example, to add a new item, do as follows:  
 *   
 * <pre>  
 * getList().add(newItem);  
 * </pre>  
 *   
 *   
 * <p>  
 * Objects of the following type(s) are allowed in the list {@link Object }  
 *   
 *   
 */  
public List<Object> getList()   
{   
    if (list == null)   
    {   
        list = new ArrayList<Object>();   
    }   
    return this.list;   
}   

public void setList(ArrayList<Object> list)   
{   
    this.list = list;   
}   

}

UserDTO instancUser(Integer id, String name)接口返回的对象定义文件com.cxf.test.interfaces.UserDTO：

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package com.cxf.test.interfaces;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlType;

/**

• Web Service传输User信息的DTO.
  
• 
  
• 分离entity类与web service接口间的耦合，隔绝entity类的修改对接口的影响. 使用JAXB 2.0的annotation标注JAVA-XML映射，尽量使用默认约定.
  

• */
  
  @XmlAccessorType(XmlAccessType.FIELD)
  
  @XmlType(name = "User")
  
  public class UserDTO
  
  {

  protected Integer id;

  protected String name;

  public Integer getId()
  
  {
  
  return id;
  
  }

  public void setId(Integer value)
  
  {
  
  id = value;
  
  }

  public String getName()
  
  {
  
  return name;
  
  }

  public void setName(String value)
  
  {
  
  name = value;
  
  }
  
  }

http://127.0.0.1:8080/cfx_spring_webservice/services/HelloWorld?wsdl 得出的结果为

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

• wsdl:types
• /xs:complexType
• xs:sequence /xs:sequence /xs:complexType
• xs:sequence /xs:sequence /xs:complexType
• xs:sequence /xs:sequence /xs:complexType
• xs:sequence /xs:sequence /xs:complexType
• xs:sequence /xs:sequence /xs:complexType
• xs:sequence /xs:sequence /xs:complexType
• xs:sequence /xs:sequence /xs:complexType /xs:schema /wsdl:types
• /wsdl:message
• /wsdl:message
• /wsdl:message
• /wsdl:message
• /wsdl:message
• /wsdl:message
• /wsdl:operation
• /wsdl:operation
• /wsdl:operation /wsdl:portType
• /wsdl:input
• /wsdl:output /wsdl:operation
• /wsdl:input
• /wsdl:output /wsdl:operation
• /wsdl:input
• /wsdl:output /wsdl:operation /wsdl:binding
• /wsdl:port /wsdl:service /wsdl:definitions

Answer 1

实现原理？　这个不就是使用CXF来发布Web service吗？CXF本身提供了一些可以与Ｓｐｒｉｎｇ结合的东西用来分析Service上的哪些注解，然后注解设置发布Web service。web.xml中的CXFServlet则是用来处理Web service请求的。简单来说就是这样了，有兴趣的话可以研究下CXF的配置，想更深入了解的话可以研究下CXF的源码，很不错的东西。