js调用java webservice备忘

首先，使用javascript调用webservice原理上同开发ajax应用差不多，只不过现在发送的是SOAP协议数据，所以必须要先搞清楚服务wsdl中描述的结构，在发送时应在http header中添加sapaction（针对不同的java webservice实现略有不同）。网上很多javascript的webservce实现，不过大多都针对于c#编写的webservice，大部分不能照搬到java中使用，soapclient.js（@author: Matteo Casati, Ihar Voitka - http://www.guru4.net/）就是其中一个，经过改造之后可以使用了。

 

测试环境 ： jdk1.5 + xfire + soap1.2.

 

对原作修改如下：

1. 将c#响应Result结尾 改为 Response

 2. 添加了 getSingleValue方法兼容IE和FF.

 

注：还未用于生产环境，还需进行测试后使用。

 

修正后soapclient.js

/*****************************************************************************/ Javascript "SOAP Client" library @version: 1.4 - 2005.12.10 @author: Matteo Casati, Ihar Voitka - http://www.guru4.net/ @description: (1) SOAPClientParameters.add() method returns 'this' pointer. (2) "_getElementsByTagName" method added for xpath queries. (3) "_getXmlHttpPrefix" refactored to "_getXmlHttpProgID" (full ActiveX ProgID). @version: 1.3 - 2005.12.06 @author: Matteo Casati - http://www.guru4.net/ @description: callback function now receives (as second - optional - parameter) the SOAP response too. Thanks to Ihar Voitka. @version: 1.2 - 2005.12.02 @author: Matteo Casati - http://www.guru4.net/ @description: (1) fixed update in v. 1.1 for no string params. (2) the "_loadWsdl" method has been updated to fix a bug when the wsdl is cached and the call is sync. Thanks to Linh Hoang. @version: 1.1 - 2005.11.11 @author: Matteo Casati - http://www.guru4.net/ @description: the SOAPClientParameters.toXML method has been updated to allow special characters ("<", ">" and "&"). Thanks to Linh Hoang. @version: 1.0 - 2005.09.08 @author: Matteo Casati - http://www.guru4.net/ @notes: first release. /*****************************************************************************/ function SOAPClientParameters() { var _pl = new Array(); this.add = function(name, value) { _pl[name] = value; return this; } this.toXml = function() { var xml = ""; for(var p in _pl) { if(typeof(_pl[p]) != "function") xml += "<" + p + ">" + _pl[p].toString().replace(/&/g, "&").replace(/</g, "<").replace(/>/g, ">") + "</" + p + ">"; } return xml; } } function SOAPClient() {} SOAPClient.invoke = function(url, method, parameters, async, callback) { if(async) SOAPClient._loadWsdl(url, method, parameters, async, callback); else return SOAPClient._loadWsdl(url, method, parameters, async, callback); } // private: wsdl cache SOAPClient_cacheWsdl = new Array(); // private: invoke async SOAPClient._loadWsdl = function(url, method, parameters, async, callback) { // load from cache? var wsdl = SOAPClient_cacheWsdl[url]; if(wsdl + "" != "" && wsdl + "" != "undefined") return SOAPClient._sendSoapRequest(url, method, parameters, async, callback, wsdl); // get wsdl var xmlHttp = SOAPClient._getXmlHttp(); xmlHttp.open("POST", url + "?wsdl", async); if(async) { xmlHttp.onreadystatechange = function() { if(xmlHttp.readyState == 4) SOAPClient._onLoadWsdl(url, method, parameters, async, callback, xmlHttp); } } xmlHttp.send(null); if (!async) return SOAPClient._onLoadWsdl(url, method, parameters, async, callback, xmlHttp); } SOAPClient._onLoadWsdl = function(url, method, parameters, async, callback, req) { var wsdl = req.responseXML; SOAPClient_cacheWsdl[url] = wsdl; // save a copy in cache return SOAPClient._sendSoapRequest(url, method, parameters, async, callback, wsdl); } SOAPClient._sendSoapRequest = function(url, method, parameters, async, callback, wsdl) { // get namespace var ns = (wsdl.documentElement.attributes["targetNamespace"] + "" == "undefined") ? wsdl.documentElement.attributes.getNamedItem("targetNamespace").nodeValue : wsdl.documentElement.attributes["targetNamespace"].value; // build SOAP request var sr = "<?xml version=/"1.0/" encoding=/"utf-8/"?>" + "<soap:Envelope " + "xmlns:xsi=/"http://www.w3.org/2001/XMLSchema-instance/" " + "xmlns:xsd=/"http://www.w3.org/2001/XMLSchema/" " + "xmlns:soap=/"http://schemas.xmlsoap.org/soap/envelope//">" + "<soap:Body>" + "<" + method + " xmlns=/"" + ns + "/">" + parameters.toXml() + "</" + method + "></soap:Body></soap:Envelope>"; // send request var xmlHttp = SOAPClient._getXmlHttp(); xmlHttp.open("POST", url, async); var soapaction = ((ns.lastIndexOf("/") != ns.length - 1) ? ns + "/" : ns) + method; xmlHttp.setRequestHeader("SOAPAction", soapaction); xmlHttp.setRequestHeader("Content-Type", "text/xml; charset=utf-8"); if(async) { xmlHttp.onreadystatechange = function() { if(xmlHttp.readyState == 4) SOAPClient._onSendSoapRequest(method, async, callback, wsdl, xmlHttp); } } xmlHttp.send(sr); if (!async) return SOAPClient._onSendSoapRequest(method, async, callback, wsdl, xmlHttp); } SOAPClient._onSendSoapRequest = function(method, async, callback, wsdl, req) { var o = null; var nd = SOAPClient._getElementsByTagName(req.responseXML, method + "Response"); if( 0 == nd.length ) { nd = SOAPClient._getElementsByTagName(req.responseXML, method + "Result"); } if(nd.length == 0) { if(req.responseXML.getElementsByTagName("faultcode").length > 0) throw new Error(500, req.responseXML.getElementsByTagName("faultstring")[0].childNodes[0].nodeValue); } else o = SOAPClient._soapresult2object(nd[0], wsdl); if(callback) if(document.all) callback(o, req.responseText); else callback(o, req.responseXML); if(!async) return o; } // private: utils SOAPClient._getElementsByTagName = function(document, tagName) { try { if(document.all) { // trying to get node omitting any namespaces (latest versions of MSXML.XMLDocument) return document.selectNodes(".//*[local-name()=/""+ tagName +"/"]"); }else { return document.evaluate(".//*[local-name()=/""+ tagName +"/"]", document, null, XPathResult.ANY_TYPE,null); } } catch (ex) {} // old XML parser support return document.getElementsByTagName(tagName); } SOAPClient._soapresult2object = function(node, wsdl) { return SOAPClient._node2object(node, wsdl); } SOAPClient._node2object = function(node, wsdl) { // null node if(node == null) return null; // text node if(node.nodeType == 3 || node.nodeType == 4) return SOAPClient._extractValue(node, wsdl); // leaf node if (node.childNodes.length == 1 && (node.childNodes[0].nodeType == 3 || node.childNodes[0].nodeType == 4)) return SOAPClient._node2object(node.childNodes[0], wsdl); var isarray = SOAPClient._getTypeFromWsdl(node.nodeName, wsdl).toLowerCase().indexOf("arrayof") != -1; // object node if(!isarray) { var obj = null; if(node.hasChildNodes()) obj = new Object(); for(var i = 0; i < node.childNodes.length; i++) { var p = SOAPClient._node2object(node.childNodes[i], wsdl); obj[node.childNodes[i].nodeName] = p; } return obj; } // list node else { // create node ref var l = new Array(); for(var i = 0; i < node.childNodes.length; i++) l[l.length] = SOAPClient._node2object(node.childNodes[i], wsdl); return l; } return null; } SOAPClient._extractValue = function(node, wsdl) { var value = node.nodeValue; switch(SOAPClient._getTypeFromWsdl(node.parentNode.nodeName, wsdl).toLowerCase()) { default: case "s:string": return (value != null) ? value + "" : ""; case "s:boolean": return value+"" == "true"; case "s:int": case "s:long": return (value != null) ? parseInt(value + "", 10) : 0; case "s:double": return (value != null) ? parseFloat(value + "") : 0; case "s:datetime": if(value == null) return null; else { value = value + ""; value = value.substring(0, value.lastIndexOf(".")); value = value.replace(/T/gi," "); value = value.replace(/-/gi,"/"); var d = new Date(); d.setTime(Date.parse(value)); return d; } } } SOAPClient._getTypeFromWsdl = function(elementname, wsdl) { var ell = wsdl.getElementsByTagName("s:element"); // IE if(ell.length == 0) ell = wsdl.getElementsByTagName("element"); // MOZ for(var i = 0; i < ell.length; i++) { if(ell[i].attributes["name"] + "" == "undefined") // IE { if(ell[i].attributes.getNamedItem("name") != null && ell[i].attributes.getNamedItem("name").nodeValue == elementname && ell[i].attributes.getNamedItem("type") != null) return ell[i].attributes.getNamedItem("type").nodeValue; } else // MOZ { if(ell[i].attributes["name"] != null && ell[i].attributes["name"].value == elementname && ell[i].attributes["type"] != null) return ell[i].attributes["type"].value; } } return ""; } // private: xmlhttp factory SOAPClient._getXmlHttp = function() { try { if(window.XMLHttpRequest) { var req = new XMLHttpRequest(); // some versions of Moz do not support the readyState property and the onreadystate event so we patch it! if(req.readyState == null) { req.readyState = 1; req.addEventListener("load", function() { req.readyState = 4; if(typeof req.onreadystatechange == "function") req.onreadystatechange(); }, false); } return req; } if(window.ActiveXObject) return new ActiveXObject(SOAPClient._getXmlHttpProgID()); } catch (ex) {} throw new Error("Your browser does not support XmlHttp objects"); } SOAPClient._getXmlHttpProgID = function() { if(SOAPClient._getXmlHttpProgID.progid) return SOAPClient._getXmlHttpProgID.progid; var progids = ["Msxml2.XMLHTTP.5.0", "Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0", "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"]; var o; for(var i = 0; i < progids.length; i++) { try { o = new ActiveXObject(progids[i]); return SOAPClient._getXmlHttpProgID.progid = progids[i]; } catch (ex) {}; } throw new Error("Could not find an installed XML parser"); } /* 以下为添加方法 */ SOAPClient.getSingleValue = function(repXML , name) { if(document.all) { var xmldom = new ActiveXObject("Microsoft.XMLDOM"); xmldom.async = false; xmldom.loadXML(repXML); return xmldom.getElementsByTagName(name)[0].text; }else { return repXML.getElementsByTagName(name)[0].textContent; } }