JAVA Pattern和Matcher 的用法

最新推荐文章于 2023-07-28 12:02:59 发布

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本文介绍如何在Java中使用正则表达式处理字符串，包括Pattern和Matcher类的基本使用方法，以及通过实例演示如何编译正则表达式并进行匹配。

String上可使用正则表达式的操作，实际上是利用了java.util.regex.Pattern与java.util.regex.Matcher的功能。当调用String的matches()方法时，实际上是调用Pattern的静态方法matches()，这个方法会返回boolean值，表示字符串是否符合正则表达式。
如果想要将正则表达式视为一个对象来重复使用，可以使用Pattern的静态方法compile()进行编译。compile()方法会返回一个Pattern的实例，这个实例代表正则表达式，之后就可以重复使用Pattern实例的matcher()方法来返回一个Matcher的实例，代表符合正则式的实例，这个实例上有一些寻找符合正则式条件的方法可供操作。

function ajaxExportExcel(formName){
		var type = "${isBranch}";
		
		//if(type=="0"){
		//	Ext.MessageBox.alert("警告", "没有数据！");
		//	return;
		//}
		
		var agentName = "agentName:" + Ext.getCmp("agentName").getValue();
		
		var system = "system:" + Ext.getCmp("system_id").getValue();
		
		if (Ext.getCmp("system_id").getRawValue()=='') {
		    system = "system:";
		}
		
		var officeNo = "officeNo:" + Ext.getCmp("officeNo").getValue();
		var status = "status:" + Ext.getCmp("status_id").getValue();
		if (Ext.getCmp("status_id").getRawValue()=='') {
		    status = "status:";
		}
		var startTime = "startTime:" + Ext.getCmp("startTime_index_1").getRawValue();
		var endTime = "endTime:" + Ext.getCmp("startTime_index_2").getRawValue();
		var zData = "zData:" + Ext.getCmp("zData").getValue();

		var params = agentName + "_@_" + system + "_@_" + officeNo + "_@_" 
		+ status + "_@_"+ startTime + "_@_" + endTime + "_@_" + zData;
		
		var myMask = new Ext.LoadMask(Ext.getBody(), {msg:"请稍候..."});
		myMask.show();
		
		Ext.Ajax.request({
			url: "./report!exportqueryHistorysReport.action",
			timeout: 900000,  
		    method: 'post',
			params: {queryInfo: params},
			success:function(action){
				var response = action.responseText;
				if(response.indexOf('file:')==-1){
					myMask.hide();
					Ext.MessageBox.show({
	   					title: "导出报表失败",
		           		msg: response,
		           		buttons: Ext.MessageBox.OK,
		           		icon: Ext.MessageBox.INFO
		       		});
				}else{
					var reportFileName = response.substring(5);
					var newWindow = new Ext.Window({
		                	id: 'winExportReport',
		                	title: this.title,
		                	width: 850,
		                	layout: 'fit',
		                	collapsible: true,
		                	height: this.height,
		                	frame: true,
		                	modal: true,
		                	html: '<iframe id="iframe1" src="../report/download?filePath='+reportFileName+'" width="100%" height="500"/>'
						});
		            newWindow.addListener("show", function(){delayCloseWindow(myMask);}); 
		            newWindow.addListener("close", function(){myMask.hide();});
	                newWindow.show();
	            }
            },
		    failure: function(action){ 
				var response = action.responseText;
		       	myMask.hide(); 
		       	Ext.MessageBox.show({
					title: "导出报表失败",
		           	msg: response,
		           	buttons: Ext.MessageBox.OK,
		           	icon: Ext.MessageBox.INFO
		       	});
			}
		});
	}

private static Pattern configSummaryQueryParameterPatternhy = 
		Pattern.compile("^agentName:(.*)_@_system:(.*)_@_officeNo:(.*)_@_status:(.*)_@_startTime:(.*)_@_endTime:(.*)_@_zData:(.*)$");


public String exportqueryHistorysReport()throws Exception{
		//数据渲染器选择标记
		ServletActionContext.getRequest().setAttribute(
				com.travelsky.bravo.core.ui.Constants.AJAX_HANDLE_KEY,
				com.travelsky.bravo.core.ui.Constants.AJAX_HANDLE_VALUE);
		try{
	        String queryInfo = ServletActionContext.getRequest().getParameter("queryInfo").trim();
			Matcher matcher = configSummaryQueryParameterPatternhy.matcher(queryInfo);
			if (!matcher.find()) {
				throw new RuntimeException("wrong parameters:" + queryInfo);
			}
			SecUser currentUser = RequestHandler.getContextRequestHandler().getCurrentUser();
			String islocaluse=currentUser.getBranchId().getIslocaluse();
			String fileName = reportManager.generateConfigHistorysReport(
					StringUtils.trim(matcher.group(1)), 
					StringUtils.trim(matcher.group(2)), 
					StringUtils.trim(matcher.group(3)), 
					StringUtils.trim(matcher.group(4)), 
					StringUtils.trim(matcher.group(5)), 
					StringUtils.trim(matcher.group(6)),
					StringUtils.trim(matcher.group(7)),islocaluse); 
			
			ServletActionContext.getRequest().setAttribute(
					Constants.AJAX_HANDLE_STATUS,  "Y");
			ServletActionContext.getRequest().setAttribute(
					Constants.AJAX_HANDLE_MSG,  "file:" + fileName);
		}catch(Exception e){
			logger.error(e.getMessage(), e);
			ServletActionContext.getRequest().setAttribute(
					Constants.FORM_AJAX_SUBMIT_STATUS,
					Constants.FORM_AJAX_SUBMIT_FAILURE);
			ServletActionContext.getRequest().setAttribute(
					Constants.FORM_AJAX_SUBMIT_MSG,
					e.getMessage());
		}
		return JSON_DATA_RENDER_CHAIN;
	}