JAX-WS学习笔记

发布时间：2020-12-17 01:15:48 所属栏目：安全来源：网络整理

导读：本文是根据JAX-WS使用教程.pdf学习所写笔记 ? 1、 JAX-WS 概述 JAX-WS 2.0 的全称为 Java API for XML-Based Web services (JAX-WS) 2.0。JAX-WS 2.0 是对 JAX-RPC 1.0 规范的扩展，是 JAX-RPC 1.1 的后续版本， JAX-RPC 2.0标准发布不久后便被重新命名为 JA

本文是根据<JAX-WS使用教程.pdf>学习所写笔记

1、JAX-WS概述

JAX-WS 2.0 的全称为 Java API for XML-Based Web services (JAX-WS) 2.0。JAX-WS 2.0 是对 JAX-RPC 1.0 规范的扩展，是 JAX-RPC 1.1 的后续版本， JAX-RPC 2.0标准发布不久后便被重新命名为 JAX-WS 2.0。 JAX-WS 2.0 是面向 Java 5 的开发 Web services 的最新编程标准，它提供了新的编程模型和对以往的 JAX-RPC 方式的 Web services 进行了增强。

JAX-WS2.0 (JSR 224)是Sun新的web services协议栈，是一个完全基于标准的实现。在binding层，使用的是the Java Architecture for XML Binding (JAXB,JSR 222)，在parsing层，使用的是the Streaming API for XML (StAX,JSR 173)，同时它还完全支持schema规范。

2、创建Web Service

JAX-WS 2.0 有两种开发过程：自顶向下和自底向上。自顶向下方式指通过一个 WSDL 文件来创建Web Service，自底向上是从 Java 类出发创建 Web Service。两种开发过程最终形成的文件包括：

????? l SEI。一个SEI对应WSDL中Web Service的一个port，在Java中是一个Java接口。

????? l SEI实现类。

????? l WSDL和XSD文件。

2.1 从java开始

编写类Hello

代码如下：

package ws;

import javax.jws.WebMethod;

import javax.jws.WebService;

@WebService

public class Hello {

??? @WebMethod

??? public String say(String name,int age){

??????? return "Hello,I am "+name+",I am "+age+" years old";

??? }

}

根据这webservice类，生成wsdl和服务端代码

2.1.1 运行wsgen

wsgen -cp ./bin -r ./wsdl -s ./src -d ./bin -wsdl ws.Hello

解释：

-cp 定义classpath,就是ws.Hello这个类的classes文件存放的地方（如:binwsHello.class）
?-r 生成 bean的wsdl文件的存放目录,即指定wsdl存放地方
-s 生成发布Web Service的源代码文件的存放目录（如果方法有抛出异常，则会生成该异常的描述类源文件）
-d 生成发布Web Service的编译过的二进制类文件的存放目录（该异常的描述类的class文件），即生成的Say和SayResponse的class文件存放处

生成的java代码：

package ws.jaxws;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

import javax.xml.bind.annotation.XmlType;

@XmlRootElement(name = "say",namespace = "http://ws/")

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "say",namespace = "http://ws/",propOrder = {

??? "arg0",

??? "arg1"

})

public class Say {

??? @XmlElement(name = "arg0",namespace = "")

??? private String arg0;

??? @XmlElement(name = "arg1",namespace = "")

??? private int arg1;

??? /**

???? *

???? * @return

???? *???? returns String

???? */

??? public String getArg0() {

??????? return this.arg0;

??? }

??? /**

???? *

???? * @param arg0

???? *???? the value for the arg0 property

???? */

??? public void setArg0(String arg0) {

??????? this.arg0 = arg0;

??? }

??? /**

???? *

???? * @return

???? *???? returns int

???? */

??? public int getArg1() {

??????? return this.arg1;

??? }

??? /**

???? *

???? * @param arg1

???? *???? the value for the arg1 property

???? */

??? public void setArg1(int arg1) {

??????? this.arg1 = arg1;

??? }

}

应答代码

package ws.jaxws;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlRootElement;

import javax.xml.bind.annotation.XmlType;

@XmlRootElement(name = "sayResponse",namespace = "http://ws/")

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "sayResponse",namespace = "http://ws/")

public class SayResponse {

??? @XmlElement(name = "return",namespace = "")

??? private String _return;

??? /**

???? *

???? * @return

???? *???? returns String

???? */

??? public String getReturn() {

??????? return this._return;

??? }

??? /**

???? *

???? * @param _return

???? *???? the value for the _return property

???? */

??? public void setReturn(String _return) {

??????? this._return = _return;

??? }

}

2.1.2 生成的WSDL和XSD

?????? WSDL

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

? <types>

??? <xsd:schema>

????? <xsd:import namespace="http://ws/" schemaLocation="HelloService_schema1.xsd"/>

??? </xsd:schema>

? </types>

? <message name="say">

??? <part name="parameters" element="tns:say"/>

? </message>

? <message name="sayResponse">

??? <part name="parameters" element="tns:sayResponse"/>

? </message>

? <portType name="Hello">

??? <operation name="say">

????? <input message="tns:say"/>

????? <output message="tns:sayResponse"/>

??? </operation>

? </portType>

? <binding name="HelloPortBinding" type="tns:Hello">

??? <soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document"/>

??? <operation name="say">

????? <soap:operation soapAction=""/>

????? <input>

??????? <soap:body use="literal"/>

????? </input>

????? <output>

??????? <soap:body use="literal"/>

????? </output>

??? </operation>

? </binding>

? <service name="HelloService">

??? <port name="HelloPort" binding="tns:HelloPortBinding">

????? <soap:address location="REPLACE_WITH_ACTUAL_URL"/>

??? </port>

? </service>

</definitions>

XSD

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

<xs:schema version="1.0" targetNamespace="http://ws/" xmlns:tns="http://ws/" xmlns:xs="http://www.w3.org/2001/XMLSchema">

? <xs:element name="say" type="tns:say"/>

? <xs:element name="sayResponse" type="tns:sayResponse"/>

? <xs:complexType name="say">

??? <xs:sequence>

????? <xs:element name="arg0" type="xs:string" minOccurs="0"/>

????? <xs:element name="arg1" type="xs:int"/>

??? </xs:sequence>

? </xs:complexType>

? <xs:complexType name="sayResponse">

??? <xs:sequence>

????? <xs:element name="return" type="xs:string" minOccurs="0"/>

??? </xs:sequence>

? </xs:complexType>

</xs:schema>

2.1.3 目录结构

目录结构

2.2 从WSDL开始

????????

2.2.1 运行wsimport

使用上面生成的WSDL来反向生成Java代码。生成后，不需要进行改动。

wsimport -d ./bin -s ./src -p test.ws D:MyEclipseNGCRMWorkspacejax-wswsdlHelloService.wsdl

目录结构

2.2.2 生成的java代码

Hello.java

package test.ws;

import javax.jws.WebMethod;

import javax.jws.WebParam;

import javax.jws.WebResult;

import javax.jws.WebService;

import javax.xml.bind.annotation.XmlSeeAlso;

import javax.xml.ws.RequestWrapper;

import javax.xml.ws.ResponseWrapper;

/**

?* This class was generated by the JAX-WS RI.

?* JAX-WS RI 2.1.1 in JDK 6

?* Generated source version: 2.1

?*/

@WebService(name = "Hello",targetNamespace = "http://ws/")

@XmlSeeAlso({

??? ObjectFactory.class

})

public interface Hello {

??? /**

???? *

???? * @param arg1

???? * @param arg0

???? * @return

???? *???? returns java.lang.String

???? */

??? @WebMethod

??? @WebResult(targetNamespace = "")

??? @RequestWrapper(localName = "say",targetNamespace = "http://ws/",className = "test.ws.Say")

??? @ResponseWrapper(localName = "sayResponse",className = "test.ws.SayResponse")

??? public String say(

??????? @WebParam(name = "arg0",targetNamespace = "")

??????? String arg0,

??????? @WebParam(name = "arg1",targetNamespace = "")

??????? int arg1);

}

HelloService.java

package test.ws;

import java.net.MalformedURLException;

import java.net.URL;

import javax.xml.namespace.QName;

import javax.xml.ws.Service;

import javax.xml.ws.WebEndpoint;

import javax.xml.ws.WebServiceClient;

import javax.xml.ws.WebServiceFeature;

/**

?* This class was generated by the JAX-WS RI.

?* JAX-WS RI 2.1.1 in JDK 6

?* Generated source version: 2.1

?*/

@WebServiceClient(name = "HelloService",wsdlLocation = "file:/D:/MyEclipseNGCRMWorkspace/jax-ws/wsdl/HelloService.wsdl")

public class HelloService

??? extends Service

{

??? private final static URL HELLOSERVICE_WSDL_LOCATION;

??? static {

??????? URL url = null;

??????? try {

??????????? url = new URL("file:/D:/MyEclipseNGCRMWorkspace/jax-ws/wsdl/HelloService.wsdl");

??????? } catch (MalformedURLException e) {

??????????? e.printStackTrace();

??????? }

??????? HELLOSERVICE_WSDL_LOCATION = url;

??? }

??? public HelloService(URL wsdlLocation,QName serviceName) {

??????? super(wsdlLocation,serviceName);

??? }

??? public HelloService() {

??????? super(HELLOSERVICE_WSDL_LOCATION,new QName("http://ws/","HelloService"));

??? }

??? /**

???? *

???? * @return

???? *???? returns Hello

???? */

??? @WebEndpoint(name = "HelloPort")

??? public Hello getHelloPort() {

??????? return (Hello)super.getPort(new QName("http://ws/","HelloPort"),Hello.class);

??? }

??? /**

???? *

???? * @param features

???? *???? A list of {@link javax.xml.ws.WebServiceFeature} to configure on the proxy.? Supported features not in the <code>features</code> parameter will have their default values.

???? * @return

???? *???? returns Hello

???? */

??? @WebEndpoint(name = "HelloPort")

??? public Hello getHelloPort(WebServiceFeature... features) {

??????? return (Hello)super.getPort(new QName("http://ws/",Hello.class,features);

??? }

}

ObjectFactory.java

package test.ws;

import javax.xml.bind.JAXBElement;

import javax.xml.bind.annotation.XmlElementDecl;

import javax.xml.bind.annotation.XmlRegistry;

import javax.xml.namespace.QName;

/**

?* This object contains factory methods for each

?* Java content interface and Java element interface

?* generated in the test.ws package.

?* <p>An ObjectFactory allows you to programatically

?* construct new instances of the Java representation

?* for XML content. The Java representation of XML

?* content can consist of schema derived interfaces

?* and classes representing the binding of schema

?* type definitions,element declarations and model

?* groups.? Factory methods for each of these are

?* provided in this class.

?*/

@XmlRegistry

public class ObjectFactory {

??? private final static QName _Say_QNAME = new QName("http://ws/","say");

??? private final static QName _SayResponse_QNAME = new QName("http://ws/","sayResponse");

??? /**

???? * Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: test.ws

???? *

???? */

??? public ObjectFactory() {

??? }

??? /**

???? * Create an instance of {@link Say }

? ???*

???? */

??? public Say createSay() {

??????? return new Say();

??? }

??? /**

???? * Create an instance of {@link SayResponse }

???? *

???? */

??? public SayResponse createSayResponse() {

??????? return new SayResponse();

??? }

??? /**

???? * Create an instance of {@link JAXBElement }{@code <}{@link Say }{@code >}}

???? *

???? */

??? @XmlElementDecl(namespace = "http://ws/",name = "say")

??? public JAXBElement<Say> createSay(Say value) {

??????? return new JAXBElement<Say>(_Say_QNAME,Say.class,null,value);

??? }

??? /**

???? * Create an instance of {@link JAXBElement }{@code <}{@link SayResponse }{@code >}}

???? *

???? */

??? @XmlElementDecl(namespace = "http://ws/",name = "sayResponse")

??? public JAXBElement<SayResponse> createSayResponse(SayResponse value) {

??????? return new JAXBElement<SayResponse>(_SayResponse_QNAME,SayResponse.class,value);

??? }

}

package-info.java

@javax.xml.bind.annotation.XmlSchema(namespace = "http://ws/")

package test.ws;

Say.java

package test.ws;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlType;

/**

?* <p>Java class for say complex type.

?* <p>The following schema fragment specifies the expected content contained within this class.

?* <pre>

?* <complexType name="say">

?*?? <complexContent>

?*???? <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">

?*?????? <sequence>

?*???????? <element name="arg0" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>

?*???????? <element name="arg1" type="{http://www.w3.org/2001/XMLSchema}int"/>

?*?????? </sequence>

?*???? </restriction>

?*?? </complexContent>

?* </complexType>

?* </pre>

?*/

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "say",

??? "arg1"

})

public class Say {

??? protected String arg0;

??? protected int arg1;

??? /**

???? * Gets the value of the arg0 property.

???? *

???? * @return

???? *???? possible object is

???? *???? {@link String }

???? *????

???? */

??? public String getArg0() {

??????? return arg0;

??? }

??? /**

???? * Sets the value of the arg0 property.

???? *

???? * @param value

???? *???? allowed object is

???? *???? {@link String }

???? *?? ??

???? */

??? public void setArg0(String value) {

??????? this.arg0 = value;

??? }

??? /**

???? * Gets the value of the arg1 property.

???? *

???? */

??? public int getArg1() {

??????? return arg1;

??? }

??? /**

???? * Sets the value of the arg1 property.

???? *

???? */

??? public void setArg1(int value) {

??????? this.arg1 = value;

??? }

}

SayResponse.java

package test.ws;

import javax.xml.bind.annotation.XmlAccessType;

import javax.xml.bind.annotation.XmlAccessorType;

import javax.xml.bind.annotation.XmlElement;

import javax.xml.bind.annotation.XmlType;

/**

?* <p>Java class for sayResponse complex type.

?* <p>The following schema fragment specifies the expected content contained within this class.

?* <pre>

?* <complexType name="sayResponse">

?*?? <complexContent>

?*???? <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">

?*?????? <sequence>

?*???????? <element name="return" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>

?*?????? </sequence>

?*???? </restriction>

?*?? </complexContent>

?* </complexType>

?* </pre>

?*/

@XmlAccessorType(XmlAccessType.FIELD)

@XmlType(name = "sayResponse",propOrder = {

??? "_return"

})

public class SayResponse {

??? @XmlElement(name = "return")

??? protected String _return;

??? /**

???? * Gets the value of the return property.

???? *

???? * @return

???? *???? possible object is

???? *???? {@link String }

???? *????

???? */

??? public String getReturn() {

??????? return _return;

??? }

??? /**

???? * Sets the value of the return property.

???? *

???? * @param value

???? *???? allowed object is

???? *???? {@link String }

???? *????

???? */

??? public void setReturn(String value) {

??????? this._return = value;

??? }

}

创建SEI类

实现Hello接口，并添加@WebService注释，并至少为@WebService添加endpointInterface属性。

package test.ws;

import javax.jws.WebService;

@WebService(serviceName = "HelloService",portName = "HelloPort",endpointInterface = "test.ws.Hello",targetNamespace = "http://ws/")

public class HelloSEI implements Hello {

??? @Override

??? public String say(String arg0,int arg1) {

??????

?????? return "Hello,I am "+arg0+",I am "+arg1+" years old";

??? }

}

生成服务端要领:定义一个发布接口类,该接口类实现portType里定义的接口，重写该方法即可。在WebService里定义的serviceName = "HelloService"是服务，protName是服务里定义的端口，endpointInterface是指发布的接口，该接口即是实现的接口,即在portType里定义的操作类接口，targetNamespace是定义的域名，跟wsdl相关，建议修改wsdl里的域名，自定义域名即可.

2.3发布Web Service

2.3.1在应用程序中发布

JDK6提供了发布Web Service的简便方法： Endpoint.publish("http://localhost:8080/HelloService",new Hello());

如果是从WSDL生成的Web Service，则为， Endpoint.publish("http://localhost:8080/HelloService",new HelloSEI());

代码如下：

package test;

import javax.xml.ws.Endpoint;

import test.ws.HelloSEI;

public class TestHello {

??? public static void main(String[] args) {

?????? Endpoint.publish("http://localhost:8080/HelloService", new HelloSEI());

??? }

}

2.3.2在Web应用程序中发布

利用SUN公司提供的辅助包，可以将Web Service发布为Web应用程序。

2.3.2.1 依赖包

????????????? l activation.jar

????????????? l FastInfoset.jar

????????????? l http.jar

????????????? l jaxb-impl.jar

? l jaxws-rt.jar

? l mimepull.jar

? l resolver.jar

? l stax-ex.jar

? l streambuffer.jar

2.3.2.1发布步骤

1) 修改web.xml，添加

<listener> <listener-class> com.sun.xml.ws.transport.http.servlet.WSServletContextListener</listener-class> </listener> <servlet> <servlet-name>Hello</servlet-name> <servlet-class>com.sun.xml.ws.transport.http.servlet.WSServlet</servlet-class> <load-on-startup>2</load-on-startup> </servlet> <servlet-mapping> <servlet-name>Hello</servlet-name> <url-pattern>/HelloService</url-pattern> </servlet-mapping> 为每一个WebService声明一个com.sun.xml.ws.transport.http.servlet.WSServlet。

2) 在WEB-INF目录下新建sun-jaxws.xml文件，内容如下，

<?xml version="1.0" encoding="UTF-8"?> <endpoints version="2.0" xmlns="http://java.sun.com/xml/ns/jax-ws/ri/runtime"> <endpoint implementation="ws.server.fromjava.Hello" name="Hello" url-pattern="/HelloService" /> </endpoints> 将ws.server.fromjava.Hello声明为Web Service。

如果是从WSDL生成的Web Service，则为，

<?xml version="1.0" encoding="UTF-8"?> <endpoints version="2.0" xmlns="http://java.sun.com/xml/ns/jax-ws/ri/runtime"> <endpoint implementation="ws.server.fromjava.HelloSEI" name="Hello" url-pattern="/HelloService" /> </endpoints>

2.4 创建Web Service客户端

客户端开发的通常过程是从已有的WSDL出发，创建辅助类JAXB对象和Service代理类，然后基于这些类开发自己的客户端应用。

????????

2.4.1同步调用方式的客户端

2.4.1.1 开发步骤

????? 1) 运行wsimport命令，生成客户端代码；

????? 2) 修改生成的Java代码中的WSDL地址。

2.4.1.2 运行wsimport

???

??? wsimport -d ./bin -s ./src -p test.ws D:MyEclipseNGCRMWorkspacejax-wswsdlHelloService.wsdl

src是生成的源代码的存放路径。 bin是生成的class文件的存放路径。HelloService.wsdl是Web Service WSDL的路径。

详情请参考2.2节

2.4.1.3 修改生成的Java代码

?????? 编辑HelloService.java，将

package test.ws;

import java.net.MalformedURLException;

import java.net.URL;

import javax.xml.namespace.QName;

import javax.xml.ws.Service;

import javax.xml.ws.WebEndpoint;

import javax.xml.ws.WebServiceClient;

import javax.xml.ws.WebServiceFeature;

/**

?* This class was generated by the JAX-WS RI.

?* JAX-WS RI 2.1.1 in JDK 6

?* Generated source version: 2.1

?*/

@WebServiceClient(name = "HelloService",features);

??? }

}

修改为，

package test.ws;

import java.net.MalformedURLException;

import java.net.URL;

import javax.xml.namespace.QName;

import javax.xml.ws.Service;

import javax.xml.ws.WebEndpoint;

import javax.xml.ws.WebServiceClient;

import javax.xml.ws.WebServiceFeature;

/**

?* This class was generated by the JAX-WS RI.

?* JAX-WS RI 2.1.1 in JDK 6

?* Generated source version: 2.1

?*/

@WebServiceClient(name = "HelloService",targetNamespace = "http://ws/")

public class HelloService

??? extends Service

{

??? private final static URL HELLOSERVICE_WSDL_LOCATION;

??? public HelloService(URL wsdlLocation){? //wsdl地址由构造函数提供，非指定

??? ???????? ??super(wsdlLocation,"HelloService"));

??? }

??? static {

??????? URL url = null;

??????? try {

??????????? url = new URL("file:/D:/MyEclipseNGCRMWorkspace/jax-ws/wsdl/HelloService.wsdl");

??????? } catch (MalformedURLException e) {

??????????? e.printStackTrace();

??????? }

??????? HELLOSERVICE_WSDL_LOCATION = url;

??? }

??? public HelloService(URL wsdlLocation,features);

??? }

}

即删除WSDL具体地址。

2.4.1.4 调用Web Service

代码如下：

package test;

import java.net.URL;

import test.ws.HelloService;

public class TestHelloClient {

??? public static void main(String[] args) {

?????? try {

?????????? URL url = new URL("http://localhost:8080/HelloService?wsdl");

?????????? HelloService server = new HelloService(url);

?????????? String s = server.getHelloPort().say("liangbinny",24);

?????????? System.out.println(s);

?????? } catch (Exception e) {

?????????? e.printStackTrace();

?????? }

??? }

}

或者是

package ws.client;

import java.net.URL;

import javax.xml.namespace.QName;

import ws.server.Hello;

import ws.server.HelloService;

public class TestHelloClient {

??? public static void main(String[] args) {

?????? try {

?????????? URL url = new URL("http://localhost:8080/hello?wsdl");

?????????? //域名和服务

?????????? QName qName = new QName("http://www.liangbinny.com/","HelloService");

?????????? HelloService server = new HelloService(url,qName);

?????????? Hello hello = server.getHelloPort();

?????????? String s = hello.say("liangbinny",24);

?????????? System.out.println(s);

?????? } catch (Exception e) {

?????????? // TODO: handle exception

?????????? e.printStackTrace();

?????? }

??????

??? }

}

调用客户端要领：HelloService server = new HelloService(url,qName);(先new service),然后server.getHelloPort()(获取服务里的端口，得到的端口类即portType里定义的操作类)，最后hello.say("liangbinny",24);(得到portType里的操作类后，就得到各种方法了).

2.5 SOAP headers

2.5.1 客户端添加SOAP headers

代码如下：

package test;

import java.net.URL;

import javax.xml.namespace.QName;

import test.ws.Hello;

import test.ws.HelloService;

import com.sun.xml.ws.api.message.Headers;

import com.sun.xml.ws.developer.WSBindingProvider;

public class TestHelloClient {

??? public static void main(String[] args) {

?????? try {

?????????? URL url = new URL("http://localhost:8080/HelloService?wsdl");

?????????? HelloService server = new HelloService(url);

?????????? Hello hello = server.getHelloPort();

?????????? WSBindingProvider bp = (WSBindingProvider) hello;

?????????? bp.setOutboundHeaders(Headers.create(new QName("username"),

????????????????? "liangbinny"),Headers.create(new QName("password"),

????????????????? "123456"));

?????????? String s = server.getHelloPort().say("liangbinny",24);

?????????? System.out.println(s);

?????? } catch (Exception e) {

?????????? e.printStackTrace();

?????? }

??? }

}

2.5.2 访问SOAP headers

2.5.2.1 服务器端

@WebService public class FooService { @Resource WebServiceContext context; @WebMethod public void sayHelloTo(String name) { HeaderList hl = context.getMessageContext().get( JAXWSProperties.INBOUND_HEADER_LIST_PROPERTY); Header h = hl.get(MYHEADER); } private static final QName MYHEADER = new QName("myNsUri","myHeader"); } }

2.5.2.2 客户端

HelloPort port = helloService.getHelloPort(); // or something like that... port.sayHelloTo("duke"); HeaderList hl = port.getResponseContext().get(JAXWSProperties.INBOUND_HEADER_LIST_PROPERTY); Header h = hl.get(MYHEADER);

（编辑：李大同）

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