LoadRunner-----关联函数使用（一）

理解关联

关联是将服务器返回的数据通过一定的规则过滤出来，并将其保存为参数，以供后续的代码中使用

什么情况下需要关联

当服务器返回的数据是动态化的，且后续脚本中需要使用这个动态变化的数据

怎么关联

LR提供了关联函数web_reg_save_param，通过设置左右边界和取值范围来获取服务器返回的数据（关联函数必须放在对应请求之前，先注册，后使用）

实践案例：随机进入一个版块发帖

1、首先，在要测试页面点击鼠标右键，点击查看源文件

2、在html源文件中找到各板块链接



通过观察可以得出规律，每个板块的url前半部分一致。
因此得出~
左边界为“forunAction_show.action?id=”
右边界为“"”

3、点击Insert–>New Step，输入关联函数名称web_reg_save_param，点击OK添加函数~



（此处要注意，所有引号都要用反斜杠转义哟~）

添加好之后，脚本中会自动生成如下代码段~

打开扩展日志打印

打印结果如下~

最后把脚本中所有取板块id的地方修改为fids即可
脚本内容如下：

Action()
{

	web_set_max_html_param_len("1024");

	web_reg_save_param("JSESSIONID2", 
		"LB/IC=jsessionid=", 
		"RB/IC=\"", 
		"Ord=1", 
		"Search=body", 
		"RelFrameId=1", 
		LAST);

	web_url("userAction_loginUI.action", 
		"URL=http://localhost:8080/TestOA/userAction_loginUI.action", 
		"TargetFrame=", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=", 
		"Snapshot=t1.inf", 
		"Mode=HTML", 
		EXTRARES, 
		"Url=style/blue/images/login_bg.gif", ENDITEM, 
		"Url=style/blue/images/login.gif", ENDITEM, 
		LAST);

	web_submit_data("userAction_login.action;jsessionid=27C9A6FAA6FA9D92E13DBD466B03FB1D", 
		"Action=http://localhost:8080/TestOA/userAction_login.action;jsessionid={JSESSIONID2}", 
		"Method=POST", 
		"TargetFrame=", 
		"RecContentType=text/html", 
		"Referer=http://localhost:8080/TestOA/userAction_loginUI.action", 
		"Snapshot=t2.inf", 
		"Mode=HTML", 
		ITEMDATA, 
		"Name=loginName", "Value=admin", ENDITEM, 
		"Name=password", "Value=1234", ENDITEM, 
		"Name=x", "Value=52", ENDITEM, 
		"Name=y", "Value=22", ENDITEM, 
		EXTRARES, 
		"Url=style/blue/images/head2_bg.gif", "Referer=http://localhost:8080/TestOA/homeAction_top.action", ENDITEM, 
		"Url=style/blue/images/menu_btn_bg.gif", "Referer=http://localhost:8080/TestOA/homeAction_left.action", ENDITEM, 
		"Url=style/blue/images/top_bg.gif", "Referer=http://localhost:8080/TestOA/homeAction_top.action", ENDITEM, 
		LAST);

    
	web_reg_save_param("fids",
		"LB=forumAction_show.action?id=",
		"RB=\"",
		"Ord=all",
		LAST);



	web_url("论坛", 
		"URL=http://localhost:8080/TestOA/forumAction_list.action", 
		"TargetFrame=right", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=http://localhost:8080/TestOA/homeAction_left.action", 
		"Snapshot=t3.inf", 
		"Mode=HTML", 
		EXTRARES, 
		"Url=style/blue/images/title_bg.gif", ENDITEM, 
		"Url=style/blue/images/inputPageHeadBg.gif", ENDITEM, 
		"Url=style/blue/images/title_bg_head.gif", ENDITEM, 
		"Url=style/blue/images/title_bg_end.gif", ENDITEM, 
		LAST);
		
	web_url("技术交流", 
		"URL=http://localhost:8080/TestOA/forumAction_show.action?id={fids_2}", 
		"TargetFrame=", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=http://localhost:8080/TestOA/forumAction_list.action", 
		"Snapshot=t4.inf", 
		"Mode=HTML", 
		EXTRARES, 
		"Url=style/blue/images/pageSelector_bg.gif", "Referer=http://localhost:8080/TestOA/forumAction_show.action?id={fid}", ENDITEM, 
		LAST);

	web_url("publishNewTopic.png", 
		"URL=http://localhost:8080/TestOA/topicAction_addUI.action?forumId={fids_2}", 
		"TargetFrame=", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=http://localhost:8080/TestOA/forumAction_show.action?id={fids_2}", 
		"Snapshot=t5.inf", 
		"Mode=HTML", 
		LAST);

	web_url("fckeditor.html", 
		"URL=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", 
		"TargetFrame=", 
		"Resource=0", 
		"RecContentType=text/html", 
		"Referer=http://localhost:8080/TestOA/topicAction_addUI.action?forumId={fids_2}", 
		"Snapshot=t6.inf", 
		"Mode=HTML", 
		EXTRARES, 
		"Url=../fckconfig.js", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=js/fckeditorcode_ie.js", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=../myconfig.js", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=lang/zh-cn.js", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=skins/default/fck_editor.css", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=skins/default/images/toolbar.collapse.gif", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=skins/default/images/toolbar.expand.gif", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=skins/default/images/toolbar.buttonarrow.gif", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=skins/default/images/toolbar.start.gif", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=skins/default/fck_strip.gif", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		"Url=../fckstyles.xml", "Referer=http://localhost:8080/TestOA/fckeditor/editor/fckeditor.html?InstanceName=content&Toolbar=bbs", ENDITEM, 
		LAST);

	web_submit_data("topicAction_add.action", 
		"Action=http://localhost:8080/TestOA/topicAction_add.action", 
		"Method=POST", 
		"TargetFrame=", 
		"RecContentType=text/html", 
		"Referer=http://localhost:8080/TestOA/topicAction_addUI.action?forumId={fids_2}", 
		"Snapshot=t7.inf", 
		"Mode=HTML", 
		ITEMDATA, 
		"Name=forumId", "Value={fids_2}", ENDITEM, 
		"Name=title", "Value=测试关联发帖标题", ENDITEM, 
		"Name=content", "Value=测试关联发帖内容", ENDITEM, 
		"Name=x", "Value=35", ENDITEM, 
		"Name=y", "Value=5", ENDITEM, 
		LAST);

	return 0;
}

回放结果如下~