去哪网实习总结：递归构建“流程执行顺序”的XML文件（JavaWeb）

本来是以做数据挖掘的目的进去哪网的，结构却成了系统开发。。。

不过还是比较认真的做了三个月，老师很认同我的工作态度和成果。。。

实习马上就要结束了，总结一下几点之前没有注意过的变成习惯和问题，分享给大家。

同时打个广告：去哪网内审部招JavaWeb开发实习生，时间非常自由，每周一天、周六周日甚至都可以，时间充裕的小伙伴给我留言啊，挣个零花钱，还能长点经验。。。。（保研的、想工作的大四狗最合适不过了。。。）

map的结构为(thisProcessID, thisProcessType;nextProcessID1,nextProcessType1;...;nextProcessIDk,nextProcessTypek;)，如果processType部位start、end、split、join，则type和id相同。。。。

跑一下代码就知道是怎么回事了，直接上代码：

<span style="white-space:pre">	</span>public String XMLhead = "";	

	@SuppressWarnings({ "rawtypes", "unchecked" })
	public void formXMLfile(Map nodeMap){
		/*穿行没问题
		nodeMap.put("1", "start;2,2");
		nodeMap.put("2", "2;3,3");
		nodeMap.put("3", "3;4,end");
		nodeMap.put("4", "end");
		*/
		/* 简单并行没问题，但需要去重处理
		nodeMap.put("1", "start;2,split");
		nodeMap.put("2", "split;3,3;4,4");
		nodeMap.put("3", "3;5,join");
		nodeMap.put("4", "4;5,join");
		nodeMap.put("5", "join;6,end");
		nodeMap.put("6", "end");
		*/

		nodeMap.put("1", "start;2,split");
		nodeMap.put("2", "split;3,3;4,split;5,5");
		nodeMap.put("3", "3;6,6");
		nodeMap.put("4", "split;7,7;8,8");
		nodeMap.put("5", "5;9,join");
		nodeMap.put("6", "6;9,join");
		nodeMap.put("7", "7;10,join");
		nodeMap.put("8", "8;10,join");
		nodeMap.put("9", "join;11,end");
		nodeMap.put("10", "join;9,join");
		nodeMap.put("11", "end");
		/*简单并行没问题，但需要去重处理
		nodeMap.put("1", "start;2,split");
		nodeMap.put("2", "split;3,3;4,4");
		nodeMap.put("3", "3;5,join");
		nodeMap.put("4", "4;5,join");
		nodeMap.put("5", "join;6,split");
		nodeMap.put("6", "split;7,7;8,8");
		nodeMap.put("7", "7;9,join");
		nodeMap.put("8", "8;9,join");
		nodeMap.put("9", "join;10,end");
		nodeMap.put("10", "end");
		*/
		XMLhead = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"+"\n";
		XMLhead += "<definitions xmlns=\"http://www.omg.org/spec/BPMN/20100524/MODEL\" xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:activiti=\"http://activiti.org/bpmn\" xmlns:bpmndi=\"http://www.omg.org/spec/BPMN/20100524/DI\" xmlns:omgdc=\"http://www.omg.org/spec/DD/20100524/DC\" xmlns:omgdi=\"http://www.omg.org/spec/DD/20100524/DI\" typeLanguage=\"http://www.w3.org/2001/XMLSchema\" expressionLanguage=\"http://www.w3.org/1999/XPath\" targetNamespace=\"http://www.activiti.org/test\">"+"\n";
		String XMLtail = "</definitions>";
		XMLhead += "<process id=\"processID\" name=\"processNAME\" isExecutable=\"true\">"+"\n";
		XMLtail = "</process>\n"+XMLtail;

		String this_id = "1";//start
		String this_type = "start";
		RECUformXMLfile(nodeMap, this_id, this_type);
		String XMLfile = XMLhead + XMLtail;

		//去重
		String[] temp = XMLfile.split("\n");
		List<String> list = new LinkedList<String>();
        for(int i = 0; i < temp.length; i++) {
            if(!list.contains(temp[i])) {
                list.add(temp[i]);//改为写文件
                System.out.println(temp[i]);
            }
        }
	}

	@SuppressWarnings("rawtypes")
	public void RECUformXMLfile(Map nodeMap, String this_id, String this_type){
		if(this_type.equals("start")){//start
			String[] toNodes = nodeMap.get(this_id).toString().split(";");
			String next_id = toNodes[1].split(",")[0];
			String next_type = toNodes[1].split(",")[1];
			if(next_type.equals("split")){
				XMLhead += "<startEvent id=\"startevent1\" name=\"Start\"></startEvent>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"startevent1\" targetRef=\"gateway_"+next_id+"\"></sequenceFlow>"+"\n";
				RECUformXMLfile(nodeMap, next_id, next_type);
			} else if(next_type.equals("end_start_join")){//不可能

			} else{//task
				XMLhead += "<startEvent id=\"startevent1\" name=\"Start\"></startEvent>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"startevent1\" targetRef=\"task_"+next_id+"\"></sequenceFlow>"+"\n";
				RECUformXMLfile(nodeMap, next_id, next_type);
			}
		} else if(this_type.equals("split")){//split
			XMLhead += "<parallelGateway id=\"gateway_"+this_id+"\" name=\"Parallel Gateway\"></parallelGateway>"+"\n";
			String[] toNodes = nodeMap.get(this_id).toString().split(";");
			for(int i=1;i<toNodes.length;i++){
				String next_id = toNodes[i].split(",")[0];
				String next_type = toNodes[i].split(",")[1];
				if(next_type.equals("split")){
					XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"gateway_"+this_id+"\" targetRef=\"gateway_"+next_id+"\"></sequenceFlow>"+"\n";
					RECUformXMLfile(nodeMap, next_id, next_type);
				} else if(next_type.equals("end_start_join")){//不可能

				} else{//task
					XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"gateway_"+this_id+"\" targetRef=\"task_"+next_id+"\"></sequenceFlow>"+"\n";
					RECUformXMLfile(nodeMap, next_id, next_type);
				}
			}
		} else if(this_type.equals("end")){//不会出现，接下来的两个判断分支可能的next_type==end时，都已经处理

		} else if(this_type.equals("join")){//join，join和task，两者处理逻辑一样，除了一个用gateWay，一个用task
			String[] toNodes = nodeMap.get(this_id).toString().split(";");
			String next_id = toNodes[1].split(",")[0];
			String next_type = toNodes[1].split(",")[1];
			if(next_type.equals("end")){
				XMLhead += "<parallelGateway id=\"gateway_"+this_id+"\" name=\"Parallel Gateway\"></parallelGateway>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"gateway_"+this_id+"\" targetRef=\"endevent1\"></sequenceFlow>"+"\n";
				XMLhead += "<endEvent id=\"endevent1\" name=\"End\"></endEvent>"+"\n";
				return ;
			} else if(next_type.equals("start")){//不可能

			} else if(next_type.equals("split")){
				XMLhead += "<parallelGateway id=\"gateway_"+this_id+"\" name=\"Parallel Gateway\"></parallelGateway>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"gateway_"+this_id+"\" targetRef=\"gateway_"+next_id+"\"></sequenceFlow>"+"\n";
				RECUformXMLfile(nodeMap, next_id, next_type);
			} else if(next_type.equals("join")){
				XMLhead += "<parallelGateway id=\"gateway_"+this_id+"\" name=\"Parallel Gateway\"></parallelGateway>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"gateway_"+this_id+"\" targetRef=\"gateway_"+next_id+"\"></sequenceFlow>"+"\n";
				return ;
			} else{//task
				XMLhead += "<parallelGateway id=\"gateway_"+this_id+"\" name=\"Parallel Gateway\"></parallelGateway>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"gateway_"+this_id+"\" targetRef=\"task_"+next_id+"\"></sequenceFlow>"+"\n";
				RECUformXMLfile(nodeMap, next_id, next_type);
			}
		} else{//task，task和join，两者处理逻辑一样，除了一个用gateWay，一个用task
			String[] toNodes = nodeMap.get(this_id).toString().split(";");
			String next_id = toNodes[1].split(",")[0];
			String next_type = toNodes[1].split(",")[1];
			if(next_type.equals("end")){
				XMLhead += "<userTask id=\"task_"+this_id+"\" name=\""+this_id+"\"></userTask>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"task_"+this_id+"\" targetRef=\"endevent1\"></sequenceFlow>"+"\n";
				XMLhead += "<endEvent id=\"endevent1\" name=\"End\"></endEvent>"+"\n";
				return ;
			} else if(next_type.equals("start")){//不可能

			} else if(next_type.equals("split")){
				XMLhead += "<userTask id=\"task_"+this_id+"\" name=\""+this_id+"\"></userTask>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"task_"+this_id+"\" targetRef=\"gateway_"+next_id+"\"></sequenceFlow>"+"\n";
				RECUformXMLfile(nodeMap, next_id, next_type);
			} else if(next_type.equals("join")){
				XMLhead += "<userTask id=\"task_"+this_id+"\" name=\""+this_id+"\"></userTask>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"task_"+this_id+"\" targetRef=\"gateway_"+next_id+"\"></sequenceFlow>"+"\n";
				//return ;
				RECUformXMLfile(nodeMap, next_id, next_type);
			} else{//task
				XMLhead += "<userTask id=\"task_"+this_id+"\" name=\""+this_id+"\"></userTask>"+"\n";
				XMLhead += "<sequenceFlow id=\"flow_"+this_id+"\" sourceRef=\"task_"+this_id+"\" targetRef=\"task_"+next_id+"\"></sequenceFlow>"+"\n";
				RECUformXMLfile(nodeMap, next_id, next_type);
			}
		}
	}

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