SOC基本实现研究

1.  Java：AXIS2 + Tomcat

** 安装后的目录如下所示

** 配置好相关的环境（包括Tomcat，AXIS2， 以及AXIS2中的Lib路径）

** 发布服务，调用服务

*** 发布

//Server： Calculator.java

public class Calculator
{
    public double add(double x, double y)
    {
        return x + y;
    }
    public double sub(double x, double y)
    {
        return x - y;
    }
    public double mul(double x, double y)
    {
        return x * y;
    }
    public double div(double x, double y)
    {
        return x / y;
    }
}

>>> javac Calculator.java
然后将生成的 .class 文件放到pojo文件夹(如果没有可以手动创建)中， 此时已经默认发布为 web service。

启动Tomcat，在浏览器中输入：http://localhost:8080/axis2/

如果成功则web服务已经成功发布。

*** 调用

// Client: Calculator.java

//此处用到的一些包是axis2中的
import javax.xml.namespace.QName;
import org.apache.axis2.addressing.EndpointReference;
import org.apache.axis2.client.Options;
import org.apache.axis2.rpc.client.RPCServiceClient;

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

        // 使用RPC方式调用WebService
        RPCServiceClient serviceClient = new RPCServiceClient();
        Options options = serviceClient.getOptions();

        // 调用WebService的URL
        EndpointReference targetEPR = new EndpointReference(
                "http://localhost:8080/axis2/services/Calculator");

        options.setTo(targetEPR);

        // add方法的参数值
        Object[] add_args = new Object[] {1.0, 2.0 };

        // 指定add方法返回值的数据类型
        Class[] add_return = new Class[] { double.class };

        // 指定要调用的add方法及WSDL文件的命名空间
        QName add_method = new QName("http://ws.apache.org/axis2", "add");

        // 调用add方法并输出该方法的返回值
        System.out.println("1 + 2 = "+serviceClient.invokeBlocking(add_method, add_args,
                add_return)[0]);

    }
}

2. Python：SOAPpy模块

** 访问刚才用AXIS2发布的web服务（体现与编程环境的独立性，以及Web Service的松散耦合性）

import SOAPpy
#local client that calls local web service
url = "http://localhost:8080/axis2/services/Calculator?wsdl"
namespace = "http://ws.apache.org/axis2"

server = SOAPpy.SOAPProxy(url, namespace)

##if you want to Show SOAP exchange message, uncomment the following lines
#proxy = SOAPpy.WSDL.Proxy(url)
#proxy.soapproxy.config.dumpHeadersIn = 1
#proxy.soapproxy.config.dumpHeadersOut = 1
#proxy.soapproxy.config.dumpSOAPIn = 1
#proxy.soapproxy.config.dumpSOAPOut = 1
#proxy.soapproxy.config.debug = 9

print server.add(1,2)

** 访问远程的Web Service

import SOAPpy

#web service: wsdl url
#content: country's and region's infomation
url = 'http://www.mobilefish.com/services/web_service/countries.php?wsdl'

server = SOAPpy.WSDL.Proxy(url)

# get all available methods
for method in server.methods:
    print method

# get all countries' info: IANA(缩写形式), country_name
for res in server.getIANAInfo():
    print res

# get a country's info through IANA
print server.countryInfoByIana('cn')

# get a country's all regions' info: latitude, longitude, ianacode, region_name 
for res in server.regionsInfoByIana('cn'):
    print res