requestScope对象

请问jsp打印出来的requestScope对象里面的javax.servlet.forward.query_string值代表什么，如何获取在用JavaScript获取里面的key-value

打印出来的requestScope部分：

'{javax.servlet.forward.context_path=/SETTLEMENT, javax.servlet.forward.servlet_path=/dsf/stat/error, javax.servlet.forward.mapping=org.apache.catalina.core.ApplicationMappingImpl@c55a92a, org.springframework.web.context.request.async.WebAsyncManager.WEB_ASYNC_MANAGER=org.springframework.web.context.request.async.WebAsyncManager@56a2a0a3, CharacterEncodingFilter.FILTERED=true, org.springframework.web.servlet.HandlerMapping.bestMatchingHandler=com.ums.settlement.dsf.controller.StatController#errorList(Model, HttpServletRequest), org.springframework.web.servlet.DispatcherServlet.CONTEXT=WebApplicationContext for namespace 'springmvc-servlet', started on Fri Jun 04 15:36:04 CST 2021, parent: Root WebApplicationContext, javax.servlet.jsp.jstl.fmt.localizationContext.request=org.springframework.web.servlet.support.JstlUtils$SpringLocalizationContext@638eee1f, javax.servlet.forward.request_uri=/SETTLEMENT/dsf/stat/error, org.springframework.web.servlet.HandlerMapping.lookupPath=/dsf/stat/error, org.springframework.web.servlet.DispatcherServlet.THEME_SOURCE=WebApplicationContext for namespace 'springmvc-servlet', started on Fri Jun 04 15:36:04 CST 2021, parent: Root WebApplicationContext, org.springframework.web.servlet.DispatcherServlet.LOCALE_RESOLVER=org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver@4bc57b97, 
javax.servlet.forward.query_string=OutChlName=%25E5%258C%2597%25E4%25BA%25AC%25E9%2593%25B6%25E8%25A1%258C&FollwDate=&FollwStatus=&SettleDate=2016-01-01&SettleDate1=2021-01-01, org.springframework.web.servlet.HandlerMapping.bestMatchingPattern=/dsf/stat/error, org.springframework.web.servlet.DispatcherServlet.OUTPUT_FLASH_MAP=FlashMap [attributes={}, targetRequestPath=null, targetRequestParams={}], org.apache.logging.log4j.web.Log4jServletFilter.FILTERED=true, org.springframework.web.servlet.HandlerMapping.pathWithinHandlerMapping=/dsf/stat/error, org.springframework.web.servlet.DispatcherServlet.FLASH_MAP_MANAGER=org.springframework.web.servlet.support.SessionFlashMapManager@41032f92, org.springframework.web.servlet.HandlerMapping.uriTemplateVariables={}, 
SettleDate=123456, org.springframework.web.servlet.DispatcherServlet.THEME_RESOLVER=org.springframework.web.servlet.theme.FixedThemeResolver@2e43ca51, org.springframework.core.convert.ConversionService=ConversionService converters =

尝试 用以下方法，但是获取不到值

var SettleDate1=${requestScope.SettleDate1};

requestScope主要是值范围，page,request,session,application

requestScope主要是值范围，page,request,session,application

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