JAVA调用返回XML格式数据的WebService，并通过XPath解析XML的应用

一、获取WSDL定义和endpoit地址
WSDL定义地址由开发者提供，为http://10.10.xx.xxx/webservice/Pangus.SCC.OracleEBS.WebService.dll/wsdl/IWebService
通过浏览器访问WSDL地址，可以看到endpoint地址的说明：
<service name="IWebServiceservice">
<port name="IWebServicePort" binding="tns:IWebServicebinding">
<soap:address location="http://10.10.xx.xxx/webservice/Pangus.SCC.OracleEBS.WebService.dll/soap/IWebService"/>
</port>
</service>

二、eclipse生成Java WebService Client代理
Eclipse->New->Other->Web Service Client->输入wsdl地址->Finish。
生成的类代码为（不包含IReelIdService.java和ReelIdServiceImpl.java类）：


三、调用WebService提供的方法
本例调用的是getIMSData方法，通过代理类IWebServicProxy.java调用，返回的数据为XML，需要解析
/**
* 调用盘古WMS系统的WebService获取REELID信息
* 返回格式是字符串，需要自己解析

* @param reelId
* @return String
*/
private
String getReelIdInfoFromPangusWebService(String reelId) {

if (null == reelId || reelId.equals("")) {
return "";
}
IWebServiceProxy wsProxy = new IWebServiceProxy();
wsProxy.setEndpoint("http://10.10.xx.xxx/webservice/Pangus.SCC.OracleEBS.WebService.dll/soap/IWebService");
StringHolder resultDTOXml = new StringHolder();
StringHolder
resultMsg = new StringHolder();
try {
Boolean success
= wsProxy.getIMSData("REELID", reelId, resultDTOXml, resultMsg);
if (!success) {
throw new
MESException("ERR-0002");
}
} catch (RemoteException
e) {
e.printStackTrace();
throw new
MESException("ERR-0002");
}
return
resultDTOXml.value;
}
四、解析XML
通过XPath解析返回的XML数据，并包装成VO。XPath有点类似于JQuery，它对XML解析，而JQuery是对DOM进行解析，XPath的具体知识可参考：http://w3school.com.cn/xpath/
/**
* 解析盘古WMS WebService返回的REELID字符串
*
格式：<DataSet><row><REELID>T905555273842-130706-0008</REELID><DATECODE/><QTY>5000.000</QTY><MTRL_ID>307674</MTRL_ID><STATUS>0</STATUS><CUST_REELID/></row></DataSet>
* @param reelIdInfo REELID字符串
* @return ReelIdVO
*/
private ReelIdVO parseXmlToVO(String reelIdInfo) {
System.out.println(reelIdInfo);
LOG.debug("reelIdInfo = " +
reelIdInfo);
try {
DocumentBuilderFactory dbf =
DocumentBuilderFactory.newInstance();
DocumentBuilder builder =
dbf.newDocumentBuilder();
// 增加XML定义
//String data
= "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
reelIdInfo;
StringReader sr = new
StringReader(reelIdInfo);
InputSource is = new
InputSource(sr);
Document doc = builder.parse(is);
//Document doc = builder.parse(new File("C:/test.xml"));
//
通过XPath查找XML节点数据
XPathFactory factory =
XPathFactory.newInstance();
XPath xPath =
factory.newXPath();
//
根下的DataSet下的第一个row下的REELID元素文本
XPathExpression expr =
xPath.compile("/DataSet/row[1]//*");
NodeList nodes = (NodeList)
expr.evaluate(doc, XPathConstants.NODESET);
if (null == nodes)
{
return null;
}
ReelIdVO reelIdVO = new ReelIdVO();
// 库存组织
reelIdVO.setOrganizationId(Long.valueOf(getNodeValueByNodeName(nodes,
"organizationId")));
// REELID
reelIdVO.setReelId(getNodeValueByNodeName(nodes, "REELID"));
//
剩余数量
reelIdVO.setRemainQty(Double.valueOf(getNodeValueByNodeName(nodes,
"QTY")));
// 原始数量
reelIdVO.setQty(Double.valueOf(reelIdVO.getRemainQty()) +
Double.valueOf(getNodeValueByNodeName(nodes, "usedQTY")));
reelIdVO.setStatus(getNodeValueByNodeName(nodes,
"STATUS"));
reelIdVO.setManufactory(getNodeValueByNodeName(nodes,
"manufactory"));
reelIdVO.setDateCode(getNodeValueByNodeName(nodes, "DATECODE"));
reelIdVO.setLotCode(getNodeValueByNodeName(nodes, "LOTCODE"));
reelIdVO.setInventoryItemId(Long.valueOf(getNodeValueByNodeName(nodes,
"MTRL_ID")));
reelIdVO.setCustReelId(getNodeValueByNodeName(nodes,
"CUST_REELID"));
return reelIdVO;

}
catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (XPathExpressionException e)
{
e.printStackTrace();
}
return
null;
}

代码如下：

package cn.com.scc.wms.biz.reelid;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.rmi.RemoteException;
import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.rpc.holders.StringHolder;
import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathExpression;
import javax.xml.xpath.XPathExpressionException;
import javax.xml.xpath.XPathFactory;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

import cn.com.scc.common.sys.MESException;
import cn.com.scc.wms.vo.ReelIdVO;

/**
* REELID业务方法
* @author XUHL
* @deprecated  从盘古WebService获取数据
*
*/
//@Service(value = "reelIdServiceImpl")
public class ReelIdServiceImpl implements IReelIdService {

private final Logger LOG = LoggerFactory.getLogger(getClass());

@Override
public ReelIdVO getByReelId(String reelId) {

String reelIdString = this.getReelIdInfoFromPangusWebService(reelId);
return this.parseXmlToVO(reelIdString);
}

@Override
public List<ReelIdVO> getAllByInventoryItemNumber(String inventoryItemNumber) {
// TODO Auto-generated method stub
return null;
}

@Override
public List<ReelIdVO> getAllByCustReelId(String custReelId) {
// TODO Auto-generated method stub
return null;
}

/**
* 调用盘古WMS系统的WebService获取REELID信息
* 返回格式是字符串，需要自己解析
* @param reelId
* @return String
*/
private String getReelIdInfoFromPangusWebService(String reelId) {

if (null == reelId || reelId.equals("")) {
return "";
}
IWebServiceProxy wsProxy = new IWebServiceProxy();
wsProxy.setEndpoint("http://10.10.1.109/webservice/Pangus.SCC.OracleEBS.WebService.dll/soap/IWebService");
StringHolder resultDTOXml = new StringHolder();
StringHolder resultMsg = new StringHolder();
try {
Boolean success = wsProxy.getIMSData("REELID", reelId, resultDTOXml, resultMsg);
if (!success) {
throw new MESException("ERR-0002");
}
} catch (RemoteException e) {
e.printStackTrace();
throw new MESException("ERR-0002");
}
return resultDTOXml.value;
}

/**
* 解析盘古WMS WebService返回的REELID字符串
* 格式：<DataSet><row><REELID>T905555273842-130706-0008</REELID><DATECODE/><QTY>5000.000</QTY><MTRL_ID>307674</MTRL_ID><STATUS>0</STATUS><CUST_REELID/></row></DataSet>
* @param reelIdInfo REELID字符串
* @return ReelIdVO
*/
private ReelIdVO parseXmlToVO(String reelIdInfo) {
System.out.println(reelIdInfo);
LOG.debug("reelIdInfo = " + reelIdInfo);
try {
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = dbf.newDocumentBuilder();
// 增加XML定义
//String data = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + reelIdInfo;
StringReader sr = new StringReader(reelIdInfo);
InputSource is = new InputSource(sr);
Document doc = builder.parse(is);
//Document doc = builder.parse(new File("C:/test.xml"));
// 通过XPath查找XML节点数据
XPathFactory factory = XPathFactory.newInstance();
XPath xPath = factory.newXPath();
// 根下的DataSet下的第一个row下的REELID元素文本
XPathExpression expr = xPath.compile("/DataSet/row[1]//*");
NodeList nodes = (NodeList) expr.evaluate(doc, XPathConstants.NODESET);
if (null == nodes) {
return null;
}
ReelIdVO reelIdVO = new ReelIdVO();
// 库存组织
reelIdVO.setOrganizationId(Long.valueOf(getNodeValueByNodeName(nodes, "organizationId")));
// REELID
reelIdVO.setReelId(getNodeValueByNodeName(nodes, "REELID"));
// 剩余数量
reelIdVO.setRemainQty(Double.valueOf(getNodeValueByNodeName(nodes, "QTY")));
// 原始数量
reelIdVO.setQty(Double.valueOf(reelIdVO.getRemainQty()) + Double.valueOf(getNodeValueByNodeName(nodes, "usedQTY")));
reelIdVO.setStatus(getNodeValueByNodeName(nodes, "STATUS"));
reelIdVO.setManufactory(getNodeValueByNodeName(nodes, "manufactory"));
reelIdVO.setDateCode(getNodeValueByNodeName(nodes, "DATECODE"));
reelIdVO.setLotCode(getNodeValueByNodeName(nodes, "LOTCODE"));
reelIdVO.setInventoryItemId(Long.valueOf(getNodeValueByNodeName(nodes, "MTRL_ID")));
reelIdVO.setCustReelId(getNodeValueByNodeName(nodes, "CUST_REELID"));
return reelIdVO;

} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (XPathExpressionException e) {
e.printStackTrace();
}
return null;
}

private String getNodeValueByNodeName(NodeList nodes, String nodeName) {

for (int i = 0; i < nodes.getLength(); i++) {
if (nodes.item(i).getNodeName().equals(nodeName)) {
return nodes.item(i).getTextContent();
}
}
return "";
}

}