springboot策略工厂模式动态获取service

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jack 2024-10-08 14:03:22

一.前言

说起web service最近几年restful大行其道，大有取代传统soap web service的趋势，但是一些特有或相对老旧的系统依然使用了传统的soap web service，例如银行、航空公司的机票查询接口等。本博客主要讲解得是spring boot整合cxf发布webservice服务和spring boot整合cxf客户端调用webservice服务

本案例使用maven方式

二.编码

核心文件清单

1.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/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.leftso</groupId>
	<artifactId>demo-webservice-cxf</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>demo-webservice-cxf</name>
	<description>Demo project for Spring Boot security</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.4.5.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<!-- CXF webservice -->
		<dependency>
			<groupId>org.apache.cxf</groupId>
			<artifactId>cxf-spring-boot-starter-jaxws</artifactId>
			<version>3.1.7</version>
		</dependency>
		<!-- CXF webservice -->

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>


</project>

2.CommonService.java 服务接口

package com.leftso.webservice;

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

/**
 * 接口
 * 
 * @author leftso
 *
 */
@WebService(name = "CommonService", // 暴露服务名称
		targetNamespace = "http://webservice.leftso.com/"// 命名空间,一般是接口的包名倒序
)
public interface CommonService {
	@WebMethod
	@WebResult(name = "String", targetNamespace = "")
	public String sayHello(@WebParam(name = "userName") String name);

}

3.接口实现

package com.leftso.webservice;

import javax.jws.WebService;

import org.springframework.stereotype.Component;

/**
 * 接口实现
 * 
 * @author leftso
 *
 */
@WebService(serviceName = "CommonService", // 与接口中指定的name一致
		targetNamespace = "http://webservice.leftso.com/", // 与接口中的命名空间一致,一般是接口的包名倒
		endpointInterface = "com.leftso.webservice.CommonService"// 接口地址
)
@Component
public class CommonServiceImp implements CommonService {

	@Override
	public String sayHello(String name) {

		return "Hello ," + name;
	}

}

4.配置cxf服务发布,默认服务在Host:port/services/***路径下

package com.leftso.config;

import javax.xml.ws.Endpoint;

import org.apache.cxf.Bus;
import org.apache.cxf.jaxws.EndpointImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import com.leftso.webservice.CommonService;

@Configuration
public class CxfConfig {
	@Autowired
	private Bus bus;

	@Autowired
	CommonService commonService;

	/** JAX-WS **/
	@Bean
	public Endpoint endpoint() {
		EndpointImpl endpoint = new EndpointImpl(bus, commonService);
		endpoint.publish("/CommonService");
		return endpoint;
	}
}

这里相当于把Commonservice接口发布在了路径 /services/CommonService 下,wsdl文档路径为 http://localhost:8080/services/CommonService?wsdl

创建基于cxf的客服端调用webservice接口（非使用wsdl文档生成java类）

package com.leftso.client;

import org.apache.cxf.endpoint.Client;
import org.apache.cxf.jaxws.JaxWsProxyFactoryBean;
import org.apache.cxf.jaxws.endpoint.dynamic.JaxWsDynamicClientFactory;

import com.leftso.webservice.CommonService;

public class CxfClient {
	public static void main(String[] args) {
		cl1();
	}

	/**
	 * 方式1.代理类工厂的方式,需要拿到对方的接口
	 */
	public static void cl1() {
		try {
			// 接口地址
			String address = "http://localhost:8080/services/CommonService?wsdl";
			// 代理工厂
			JaxWsProxyFactoryBean jaxWsProxyFactoryBean = new JaxWsProxyFactoryBean();
			// 设置代理地址
			jaxWsProxyFactoryBean.setAddress(address);
			// 设置接口类型
			jaxWsProxyFactoryBean.setServiceClass(CommonService.class);
			// 创建一个代理接口实现
			CommonService cs = (CommonService) jaxWsProxyFactoryBean.create();
			// 数据准备
			String userName = "Leftso";
			// 调用代理接口的方法调用并返回结果
			String result = cs.sayHello(userName);
			System.out.println("返回结果:" + result);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	/**
	 * 动态调用方式
	 */
	public static void cl2() {
		// 创建动态客户端
		JaxWsDynamicClientFactory dcf = JaxWsDynamicClientFactory.newInstance();
		Client client = dcf.createClient("http://localhost:8080/services/CommonService?wsdl");
		// 需要密码的情况需要加上用户名和密码
		// client.getOutInterceptors().add(new ClientLoginInterceptor(USER_NAME,
		// PASS_WORD));
		Object[] objects = new Object[0];
		try {
			// invoke("方法名",参数1,参数2,参数3....);
			objects = client.invoke("sayHello", "Leftso");
			System.out.println("返回数据:" + objects[0]);
		} catch (java.lang.Exception e) {
			e.printStackTrace();
		}
	}
}

调用后返回结果输出为

Hello,Leftso

项目源码GITHUB下载:

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三.问题Q&A 3.1已知问题1

将上面例子的Spring Boot版本升级至1.5.x。启动项目报错:

java.lang.NoClassDefFoundError: org/springframework/boot/context/embedded/ServletRegistrationBean
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_40]
	at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_40]
	at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_40]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613) ~[spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524) ~[spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510) ~[spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.util.ReflectionUtils.getUniqueDeclaredMethods(ReflectionUtils.java:570) ~[spring-core-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.getTypeForFactoryMethod(AbstractAutowireCapableBeanFactory.java:697) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineTargetType(AbstractAutowireCapableBeanFactory.java:640) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.predictBeanType(AbstractAutowireCapableBeanFactory.java:609) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.beans.factory.support.AbstractBeanFactory.isFactoryBean(AbstractBeanFactory.java:1484) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.doGetBeanNamesForType(DefaultListableBeanFactory.java:425) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanNamesForType(DefaultListableBeanFactory.java:395) ~[spring-beans-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:96) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:525) ~[spring-context-4.3.12.RELEASE.jar:4.3.12.RELEASE]
	at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) [spring-boot-1.5.8.RELEASE.jar:1.5.8.RELEASE]
	at com.leftso.Application.main(Application.java:10) [classes/:na]
Caused by: java.lang.ClassNotFoundException: org.springframework.boot.context.embedded.ServletRegistrationBean
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_40]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_40]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_40]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_40]
	... 23 common frames omitted

解决办法:

出现这个问题的第一时间，我以为是常规的maven管理jar包依赖问题。后面群里有小伙伴多次尝试证明了不是maven的依赖包问题。而是spring boot的版本和cxf的版本不兼容问题。

已知兼容版本:

Spring boot 1.4.x ------>cxf-spring-boot-starter-jaxws 3.1.x

Spring boot 1.5.x------->cxf-spring-boot-starter-jaxws 3.2.x

所以出现上面问题,且用了spring boot 1.5.x的小伙伴请将cxf-spring-boot-starter-jaxws 版本升级到3.2.1即可解决。

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