Spring Web Services 编写服务器

在本章中，我们将了解如何使用Spring WS创建Web应用程序服务器。

序号	描述
1	在Spring WS-First Application章节中解释，在com.codingdict包下创建一个名为countryService的项目。
2	按照以下步骤中的说明创建countries.xsd，域类，CountryRepository和CountryEndPoint。
3	更新/ WEB-INF子文件夹下的spring-ws-servlet.xml。
4	最后一步是为所有源文件和配置文件创建内容并导出应用程序，如下所述。

countries.xsd

<xs:schema xmlns:xs = "http://www.w3.org/2001/XMLSchema"
   xmlns:tns = "http://codingdict/schemas"
   targetNamespace = "http://codingdict/schemas"
   elementFormDefault = "qualified">

   <xs:element name = "getCountryRequest">
      <xs:complexType>
         <xs:sequence>
            <xs:element name = "name" type = "xs:string"/>
         </xs:sequence>
      </xs:complexType>
   </xs:element>

   <xs:element name = "getCountryResponse">
      <xs:complexType>
         <xs:sequence>
            <xs:element name = "country" type = "tns:country"/>
         </xs:sequence>
      </xs:complexType>
   </xs:element>

   <xs:complexType name = "country">
      <xs:sequence>
         <xs:element name = "name" type = "xs:string"/>
         <xs:element name = "population" type = "xs:int"/>
         <xs:element name = "capital" type = "xs:string"/>
         <xs:element name = "currency" type = "tns:currency"/>
      </xs:sequence>
   </xs:complexType>

   <xs:simpleType name = "currency">
      <xs:restriction base = "xs:string">
         <xs:enumeration value = "GBP"/>
         <xs:enumeration value = "USD"/>
         <xs:enumeration value = "INR"/>
      </xs:restriction>
   </xs:simpleType>
</xs:schema>

创建项目

让我们打开命令控制台，转到C：\ MVN目录并执行以下 mvn 命令。

C:\MVN>mvn archetype:generate -DarchetypeGroupId = org.springframework.ws
-DarchetypeArtifactId = spring-ws-archetype -DgroupId = com.codingdict
-DartifactId = countryService

Maven将开始处理并将创建完整的Java Application Project Structure。

[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Maven Stub Project (No POM) 1
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] Using property: groupId = com.codingdict
[INFO] Using property: artifactId = countryService
Define value for property 'version':  1.0-SNAPSHOT: :
[INFO] Using property: package = com.codingdict
Confirm properties configuration:
groupId: com.codingdict
artifactId: countryService
version: 1.0-SNAPSHOT
package: com.codingdict
 Y: :
[INFO] -------------------------------------------------------------------------
---
[INFO] Using following parameters for creating project from Old (1.x) Archetype:
 spring-ws-archetype:2.0.0-M1
[INFO] -------------------------------------------------------------------------
---
[INFO] Parameter: groupId, Value: com.codingdict
[INFO] Parameter: packageName, Value: com.codingdict
[INFO] Parameter: package, Value: com.codingdict
[INFO] Parameter: artifactId, Value: countryService
[INFO] Parameter: basedir, Value: C:\mvn
[INFO] Parameter: version, Value: 1.0-SNAPSHOT
[INFO] project created from Old (1.x) Archetype in dir: C:\mvn\countryService
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 35.989 s
[INFO] Finished at: 2017-01-21T11:18:31+05:30
[INFO] Final Memory: 17M/178M
[INFO] ------------------------------------------------------------------------

现在转到C：/ MVN目录。我们将看到一个名为countryService的java应用程序项目（在artifactId中指定）。更新pom.xml。

的pom.xml

<?xml version = "1.0" encoding = "UTF-8"?>
<project xmlns = "http://maven.apache.org/POM/4.0.0"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "http://maven.apache.org/POM/4.0.0
   http://maven.apache.org/maven-v4_0_0.xsd">

   <modelVersion>4.0.0</modelVersion>
   <groupId>com.codingdict.hr</groupId>
   <artifactId>countryService</artifactId>
   <packaging>war</packaging>
   <version>1.0-SNAPSHOT</version>
   <name>countryService Spring-WS Application</name>
   <url>http://www.springframework.org/spring-ws</url>

   <build>
      <finalName>countryService</finalName>
   </build>

   <dependencies>
      <dependency>
         <groupId>org.springframework.ws</groupId>
         <artifactId>spring-ws-core</artifactId>
         <version>2.4.0.RELEASE</version>
      </dependency>

      <dependency>
         <groupId>jdom</groupId>
         <artifactId>jdom</artifactId>
         <version>1.0</version>
      </dependency>

      <dependency>
         <groupId>jaxen</groupId>
         <artifactId>jaxen</artifactId>
         <version>1.1</version>
      </dependency>

      <dependency>
         <groupId>wsdl4j</groupId>
         <artifactId>wsdl4j</artifactId>
         <version>1.6.2</version>
      </dependency>
   </dependencies>
</project>

创建域类

将countries.xsd复制到C：\ mvn \ countryService \ src \ main \ resources文件夹中。让我们打开命令控制台，转到C：\ mvn \ countryService \ src \ main \ resources目录并执行以下 xjc 命令以使用countries.xsd生成域类。

C:\MVN\countryService\src\main\resources>xjc -p com.codingdict countries.xsd

Maven将开始处理并将在com.codingdict包中创建域类。

parsing a schema...
compiling a schema...
com\codingdict\Country.java
com\codingdict\Currency.java
com\codingdict\GetCountryRequest.java
com\codingdict\GetCountryResponse.java
com\codingdict\ObjectFactory.java
com\codingdict\package-info.java

在C：\ mvn \ countryService \ src \ main文件夹中创建文件夹java。复制C：\ mvn \ countryService \ src \ main \ java文件夹中的所有类。创建CountryRepository和CountryEndPoint分别表示国家/地区数据库和国家/地区服务器。

CountryRepository.java

package com.codingdict;

import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.propertyeditors.CurrencyEditor;
import org.springframework.stereotype.Component;
import org.springframework.util.Assert;

@Component
public class CountryRepository {
   private static final List<Country> countries = new ArrayList<Country>();

   public CountryRepository(){
      initData();
   }
   public void initData() {
      Country us = new Country();
      us.setName("United States");
      us.setCapital("Washington");
      us.setCurrency(Currency.USD);
      us.setPopulation(46704314);

      countries.add(us);

      Country india = new Country();
      india.setName("India");
      india.setCapital("New Delhi");
      india.setCurrency(Currency.INR);
      india.setPopulation(138186860);

      countries.add(india);

      Country uk = new Country();
      uk.setName("United Kingdom");
      uk.setCapital("London");
      uk.setCurrency(Currency.GBP);
      uk.setPopulation(63705000);

      countries.add(uk);
   }
   public Country findCountry(String name) {
      Assert.notNull(name);
      Country result = null;

      for (Country country : countries) {
         if (name.trim().equals(country.getName())) {
            result = country;
         }
      }
      return result;
   }
}

CountryEndPoint.java

package com.codingdict.ws;

import org.jdom.JDOMException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.ws.server.endpoint.annotation.Endpoint;
import org.springframework.ws.server.endpoint.annotation.PayloadRoot;
import org.springframework.ws.server.endpoint.annotation.RequestPayload;
import org.springframework.ws.server.endpoint.annotation.ResponsePayload;

import com.codingdict.Country;
import com.codingdict.CountryRepository;
import com.codingdict.GetCountryRequest;
import com.codingdict.GetCountryResponse;

@Endpoint
public class CountryEndPoint {
   private static final String NAMESPACE_URI = "http://codingdict/schemas";
   private CountryRepository countryRepository;

   @Autowired
   public CountryEndPoint(CountryRepository countryRepository) throws JDOMException {
      this.countryRepository = countryRepository;
   }
   @PayloadRoot(namespace = NAMESPACE_URI, localPart = "getCountryRequest")
   @ResponsePayload
   public GetCountryResponse getCountry(@RequestPayload GetCountryRequest request)
      throws JDOMException {

      Country country = countryRepository.findCountry(request.getName());
      GetCountryResponse response = new GetCountryResponse();
      response.setCountry(country);
      return response;
   }
}

/WEB-INF/spring-ws-servlet.xml

<beans xmlns = "http://www.springframework.org/schema/beans"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xmlns:context = "http://www.springframework.org/schema/context"
   xmlns:sws = "http://www.springframework.org/schema/web-services"
   xsi:schemaLocation = "http://www.springframework.org/schema/beans

   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
   http://www.springframework.org/schema/web-services
   http://www.springframework.org/schema/web-services/web-services-2.0.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">

   <context:component-scan base-package = "com.codingdict"/>
   <sws:annotation-driven/>

   <sws:dynamic-wsdl id="countries"
      portTypeName = "CountriesPort"
      locationUri = "/countryService/"
      targetNamespace = "http://codingdict.com/definitions">
      <sws:xsd location = "/WEB-INF/countries.xsd"/>
   </sws:dynamic-wsdl>
</beans>

/WEB-INF/web.xml

<web-app xmlns = "http://java.sun.com/xml/ns/j2ee"
   xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation = "http://java.sun.com/xml/ns/j2ee
   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
   version = "2.4">

   <display-name>codingdict Country Service</display-name>

   <servlet>
      <servlet-name>spring-ws</servlet-name>
      <servlet-class>org.springframework.ws.transport.http.MessageDispatcherServlet
      </servlet-class>
      <init-param>
         <param-name>transformWsdlLocations</param-name>
         <param-value>true</param-value>
      </init-param>
   </servlet>

   <servlet-mapping>
      <servlet-name>spring-ws</servlet-name>
      <url-pattern>/*</url-pattern>
   </servlet-mapping>
</web-app>

建立项目

让我们打开命令控制台。转到C：\ MVN \ countryService目录并执行以下 mvn 命令。

C:\MVN\countryService>mvn clean package

Maven将开始构建该项目。

INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building countryService Spring-WS Application 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ countryService ---
[INFO] Deleting C:\mvn\countryService\target
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ countrySer
vice ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ countryService
---
[INFO] Changes detected - recompiling the module!
[WARNING] File encoding has not been set, using platform encoding Cp1252, i.e.
build is platform dependent!
[INFO] Compiling 4 source files to C:\mvn\countryService\target\classes
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) @ co
untryService ---
[WARNING] Using platform encoding (Cp1252 actually) to copy filtered resources,
i.e. build is platform dependent!
[INFO] skip non existing resourceDirectory C:\mvn\countryService\src\test\resour
ces
[INFO]
[INFO] --- maven-compiler-plugin:3.1:testCompile (default-testCompile) @ country
Service ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) @ countryService ---

[INFO] No tests to run.
[INFO]
[INFO] --- maven-war-plugin:2.2:war (default-war) @ countryService ---
[INFO] Packaging webapp
[INFO] Assembling webapp [countryService] in [C:\mvn\countryService\target\count
ryService]
[INFO] Processing war project
[INFO] Copying webapp resources [C:\mvn\countryService\src\main\webapp]
[INFO] Webapp assembled in [5137 msecs]
[INFO] Building war: C:\mvn\countryService\target\countryService.war
[INFO] WEB-INF\web.xml already added, skipping
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 16.484 s
[INFO] Finished at: 2017-01-28T09:07:59+05:30
[INFO] Final Memory: 19M/170M
[INFO] ------------------------------------------------------------------------

运行项目

创建源文件和配置文件后，将countryService.war文件导出到Tomcat的webapps文件夹中。

现在，启动Tomcat服务器并确保我们是否可以使用标准浏览器从webapps文件夹访问其他网页。对URL发出POST请求 - http://localhost:8080/countryService/ 并使用任何SOAP客户端发出以下请求。

<x:Envelope xmlns:x = "http://schemas.xmlsoap.org/soap/envelope/"
   xmlns:tns = "http://codingdict/schemas">
   <x:Header/>
   <x:Body>
      <tns:getCountryRequest>
         <tns:name>United States</tns:name>
      </tns:getCountryRequest>
   </x:Body>
</x:Envelope>

您将看到以下结果。

<SOAP-ENV:Envelope xmlns:SOAP-ENV = "http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header/>
   <SOAP-ENV:Body>
      <ns2:getCountryResponse xmlns:ns2 = "http://codingdict/schemas">
         <ns2:country>
            <ns2:name>United States</ns2:name>
            <ns2:population>46704314</ns2:population>
            <ns2:capital>Washington</ns2:capital>
            <ns2:currency>USD</ns2:currency>
         </ns2:country>
      </ns2:getCountryResponse>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>