如何在JSP页面中使用FreeMarker标签和Struts2标签
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<filter> <filter-name>struts-cleanup</filter-name> <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class> </filter> <filter> <filter-name>sitemesh-freemarker</filter-name> <filter-class>org.apache.struts2.sitemesh.FreeMarkerPageFilter</filter-class> <init-param> <param-name>default_encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> </filter> <filter-mapping> <filter-name>struts-cleanup</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>sitemesh-freemarker</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>JspSupportServlet</servlet-name> <servlet-class>org.apache.struts2.views.JspSupportServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <filter> <filter-name>struts-cleanup</filter-name> <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class></filter><filter> <filter-name>sitemesh-freemarker</filter-name> <filter-class>org.apache.struts2.sitemesh.FreeMarkerPageFilter</filter-class> <init-param> <param-name>default_encoding</param-name> <param-value>UTF-8</param-value> </init-param></filter><filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class></filter> <filter-mapping> <filter-name>struts-cleanup</filter-name> <url-pattern>/*</url-pattern></filter-mapping><filter-mapping> <filter-name>sitemesh-freemarker</filter-name> <url-pattern>/*</url-pattern></filter-mapping><filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern></filter-mapping><servlet> <servlet-name>JspSupportServlet</servlet-name> <servlet-class>org.apache.struts2.views.JspSupportServlet</servlet-class> <load-on-startup>1</load-on-startup></servlet> 本文的重点是如何在JSP中使用FreeMarker标签，有人可能会问：为什么不直接在FreeMarker模版文件中使用JSP标签呢？<%@ taglib uri="/WEB-INF/fmtag.tld" prefix="fm" %> <html> <head> <title>Login</title> </head> <body> <h1>Hello World.</h1> <fm:template> <#assign y="Hello World"> ${y} <#assign seq = ["winter", "spring", "summer", "autumn"]> <#list seq as x> ${x_index + 1}. ${x}<#if x_has_next>,</#if> </#list> </fm:template> </body> </html> <%@ taglib uri="/WEB-INF/fmtag.tld" prefix="fm" %><html> <head> <title>Login</title> </head><body> <h1>Hello World.</h1> <fm:template> <#assign y="Hello World"> ${y} <#assign seq = ["winter", "spring", "summer", "autumn"]> <#list seq as x> ${x_index + 1}. ${x}<#if x_has_next>,</#if> </#list> </fm:template></body></html> 大家注意了FreeMarker的部分必须放在标签<fm:template>与</fm:template>之间，否则JSP不会解析FreeMarker的内容，会把源码输出在页面之中
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