Httpclient远程调用WebService示例（Eclipse+httpclient

感谢大神，仅作备忘（http://www.cnblogs.com/lanxuezaipiao/archive/2013/05/10/3072216.html）

 我们将Web Service发布在Tomcat或者其他应用服务器上后，有很多方法可以调用该Web Service，常用的有两种：

      1、通过浏览器HTTP调用，返回规范的XML文件内容
      2、通过客户端程序调用，返回结果可自定义格式

      接下来，我利用Eclipse作为开发工具，演示一个Httpclient调用WebService的简单示例
      

      第一步：新建Java Project，项目名称为HttpCallWebService

      第二步：将所需jar包导入到库中

      第三步：编写调用class，这里有两种方式调用，即GET方式和POST方式，由于POST方式较安全，故这里采用POST方式调用；请求数据的构造也有两种方式：静态和动态构造，下面分别介绍这两种方式：

      注：这里以E邮宝开放的webservice接口为例调用其中一个API函数，而E邮宝的webservice基于SOAP，故请求数据为SOAP格式，大家可根据自己情况进行修改

      静态构造请求数据：

package com.http;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.RequestEntity;

public class StaticHttpclientCall {

    /**
     * @param args
     * @throws IOException
     * @throws HttpException
     */
    public static void main(String[] args) throws HttpException, IOException {
        // TODO Auto-generated method stub

        String soapRequestData = ""
                + ""
                + " "
                + " "
                + " "
                + " 123"
                + " 123"
                + " 123"
                + " 123"
                + " 123"
                + " 123"
                + " "
                + " " + ""
                + " ";

        System.out.println(soapRequestData);

        PostMethod postMethod = new PostMethod(
                "http://epacketws.pushauction.net/v3/orderservice.asmx?wsdl");

        // 然后把Soap请求数据添加到PostMethod中
        byte[] b = soapRequestData.getBytes("utf-8");
        InputStream is = new ByteArrayInputStream(b, 0, b.length);
        RequestEntity re = new InputStreamRequestEntity(is, b.length,
                "application/soap+xml; charset=utf-8");
        postMethod.setRequestEntity(re);

        // 最后生成一个HttpClient对象，并发出postMethod请求
        HttpClient httpClient = new HttpClient();
        int statusCode = httpClient.executeMethod(postMethod);
        if(statusCode == 200) {
            System.out.println("调用成功！");
            String soapResponseData = postMethod.getResponseBodyAsString();
            System.out.println(soapResponseData);
        }
        else {
            System.out.println("调用失败！错误码：" + statusCode);
        }

    }

}

    动态构造数据：

package com.http;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.InputStreamRequestEntity;
import org.apache.commons.httpclient.methods.PostMethod;
import org.apache.commons.httpclient.methods.RequestEntity;

// 动态构造调用串，灵活性更大
public class DynamicHttpclientCall {

    private String namespace;
    private String methodName;
    private String wsdlLocation;
    private String soapResponseData;

    public DynamicHttpclientCall(String namespace, String methodName,
            String wsdlLocation) {

        this.namespace = namespace;
        this.methodName = methodName;
        this.wsdlLocation = wsdlLocation;
    }

    private int invoke(Map patameterMap) throws Exception {
        PostMethod postMethod = new PostMethod(wsdlLocation);
        String soapRequestData = buildRequestData(patameterMap);

        byte[] bytes = soapRequestData.getBytes("utf-8");
        InputStream inputStream = new ByteArrayInputStream(bytes, 0,
                bytes.length);
        RequestEntity requestEntity = new InputStreamRequestEntity(inputStream,
                bytes.length, "application/soap+xml; charset=utf-8");
        postMethod.setRequestEntity(requestEntity);

        HttpClient httpClient = new HttpClient();
        int statusCode = httpClient.executeMethod(postMethod);
        soapResponseData = postMethod.getResponseBodyAsString();

        return statusCode;
    }

    private String buildRequestData(Map patameterMap) {
        StringBuffer soapRequestData = new StringBuffer();
        soapRequestData.append("");
        soapRequestData
                .append("");
        soapRequestData.append("");
        soapRequestData.append("<" + methodName + " xmlns=\"" + namespace
                + "\">");
        soapRequestData.append("<" + methodName + "Request>");

        Set nameSet = patameterMap.keySet();
        for (String name : nameSet) {
            soapRequestData.append("<" + name + ">" + patameterMap.get(name)
                    + "");
        }
        
        soapRequestData.append("");
        soapRequestData.append("");
        soapRequestData.append("");
        soapRequestData.append("");

        return soapRequestData.toString();
    }

    /**
     * @param args
     * @throws Exception
     */
    public static void main(String[] args) throws Exception {
        // TODO Auto-generated method stub

        DynamicHttpclientCall dynamicHttpclientCall = new DynamicHttpclientCall(
                "http://shippingapi.ebay.cn/", "GetAPACShippingPackage",
                "http://epacketws.pushauction.net/v3/orderservice.asmx?wsdl");

        Map patameterMap = new HashMap();

        patameterMap.put("TrackCode", "123");
        patameterMap.put("Version", "123");
        patameterMap.put("APIDevUserID", "123");
        patameterMap.put("APIPassword", "123");
        patameterMap.put("APISellerUserID", "123");
        patameterMap.put("MessageID", "123");
        patameterMap.put("TrackCode", "123");

        String soapRequestData = dynamicHttpclientCall.buildRequestData(patameterMap);
        System.out.println(soapRequestData);

        int statusCode = dynamicHttpclientCall.invoke(patameterMap);
        if(statusCode == 200) {
            System.out.println("调用成功！");
            System.out.println(dynamicHttpclientCall.soapResponseData);
        }
        else {
            System.out.println("调用失败！错误码：" + statusCode);
        }
        
    }

}

      最终运行结果：

      可见最终返回的也是xml格式的数据，这里数据未进行格式化显示和处理