1.假设你用以下地址访问系统:
http://www.abc.com/html/aboutLaw?name=cat&age=20
很明显是渲染了aboutLaw.ftl这个页面。如果要在aboutLaw.ftl中直接使用传来的参数name和age,要怎么用呢?
很简单,用以下变量:
<#list RequestParameters?keys as x> ${x}<br/> ${RequestParameters[x]}<br/> ---------------------<br/> </#list>
其实就是用到了RequestParameters。在上例中,可以用${RequestParameters['name']}直接得到传过来的参数值。
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2.还有一个变量:Request
<#list Request?keys as x> key:${x}<br/> value:${Request[x]}<br/> --------------------- <br/> </#list>
我的controller如下:
package controller import java.util.HashSet; import net.sf.json.JSONArray import javax.servlet.RequestDispatcher import java.lang.Thread import model.* import javax.servlet.ServletResponse import org.springframework.web.servlet.ModelAndView class HtmlController extends BaseController { def gotoHtml={ render(view:"${params.page}") } def aboutLaw={ } def aboutYuanli={ } def aboutFee={ } def aboutUs={ } def help={ } }
访问地址为:
http://www.abc.com/html/aboutLaw
打印出的信息如下:
key:javax.servlet.forward.request_uri value:/html/aboutLaw --------------------- key:javax.servlet.forward.context_path value: --------------------- key:javax.servlet.forward.servlet_path value:/html/aboutLaw --------------------- key:aboutFee value:controller.HtmlController$_closure4@3b889b --------------------- key:manager value:manager.Manager@793ec9 --------------------- key:org.springframework.web.servlet.DispatcherServlet.THEME_SOURCE value:org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@1f39cb2: startup date [Tue Nov 08 09:21:17 CST 2011]; parent: Root WebApplicationContext --------------------- key:org.springframework.web.servlet.DispatcherServlet.THEME_RESOLVER value:org.springframework.web.servlet.theme.FixedThemeResolver@5e67f1 --------------------- key:springMacroRequestContext value:org.springframework.web.servlet.support.RequestContext@857f69 --------------------- key:metaClass value:groovy.lang.ExpandoMetaClass@359912[class controller.HtmlController] --------------------- key:aboutUs value:controller.HtmlController$_closure5@6ffb14 --------------------- key:help value:controller.HtmlController$_closure6@1cd022c --------------------- key:org.codehaus.groovy.grails.GRAILS_APPLICATION_ATTRIBUTES value:org.codehaus.groovy.grails.web.servlet.DefaultGrailsApplicationAttributes@49c8dd --------------------- key:urlMapping.FILTERED value: --------------------- key:charEncodingFilter.FILTERED value: --------------------- key:ctx value:org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@1f39cb2: startup date [Tue Nov 08 09:21:17 CST 2011]; parent: Root WebApplicationContext --------------------- key:org.codehaus.groovy.grails.CONTROLLER_NAME_ATTRIBUTE value:html --------------------- key:grailsApp value:org.codehaus.groovy.grails.commons.DefaultGrailsApplication@11aed03 --------------------- key:org.codehaus.groovy.grails.CONTROLLER value:controller.HtmlController@22537a --------------------- key:hiddenHttpMethod.FILTERED value: --------------------- key:grailsWebRequest.FILTERED value: --------------------- key:org.springframework.web.servlet.DispatcherServlet.CONTEXT value:org.codehaus.groovy.grails.commons.spring.GrailsWebApplicationContext@1f39cb2: startup date [Tue Nov 08 09:21:17 CST 2011]; parent: Root WebApplicationContext --------------------- key:aboutLaw value:controller.HtmlController$_closure2@1968017 --------------------- key:aboutYuanli value:controller.HtmlController$_closure3@1b3a564 --------------------- key:class value:class controller.HtmlController --------------------- key:org.codehaus.grails.INCLUDED_JS_LIBRARIES value: --------------------- key:gotoHtml value:controller.HtmlController$_closure1@12f7431 --------------------- key:getPage value:controller.BaseController$_closure1@753f9f --------------------- key:org.codehaus.groovy.grails.ACTION_NAME_ATTRIBUTE value:aboutLaw --------------------- key:org.codehaus.groovy.grails.web.sitemesh.GrailsPageFilter.GSP_SITEMESH_PAGE value:org.codehaus.groovy.grails.web.sitemesh.GSPSitemeshPage@1a41860 --------------------- key:reloadFilter.FILTERED value: --------------------- key:com.opensymphony.sitemesh.APPLIED_ONCE value: --------------------- key:sysParaService value:service.SysParaService@6231ed --------------------- key:day value:86400 --------------------- key:org.codehaus.groovy.grails.WEB_REQUEST value:ServletWebRequest: uri=/grails/html/aboutLaw.dispatch;client=127.0.0.1;session=D0849CBBEA6B59B4B7A0653BBF363064 --------------------- key:org.springframework.web.servlet.DispatcherServlet.LOCALE_RESOLVER value:org.springframework.web.servlet.i18n.SessionLocaleResolver@44899b
其中的javax.servlet.forward.request_uri很有用。
在freemarker中取得当前url ,就可以用以下语句
${Request['javax.servlet.forward.request_uri']}