Expession Basic Objects

Kontextvariabeln

Die folgenden Context-Variables werden von OGNL zur Verfügung gestellt:

• #ctx : the context object.
• #vars: the context variables.
• #locale : the context locale.
• #httpServletRequest : (only in Web Contexts) the HttpServletRequest object.
• #httpSession : (only in Web Contexts) the HttpSession object.

Beispiel:

Established locale country: <span th:text="${#locale.country}">US</span>.

ctx

#ctx : the context object. It will be an implementation of org.thymeleaf.context.IContext , org.thymeleaf.context.IWebContext depending on our environment (standalone or web). If we are using the Spring integration module, it will be an instance of org.thymeleaf.spring[3|4].context.SpringWebContext .

Verwendung:

${#ctx.applicationAttributes}
${#ctx.httpServletRequest}
${#ctx.httpServletResponse}
${#ctx.httpSession}
${#ctx.requestAttributes}
${#ctx.requestParameters}
${#ctx.servletContext}
${#ctx.sessionAttributes}

locale

direct access to the java.util.Locale associated with current request.

Verwendung:

${#locale}

vars

#vars : an instance of org.thymeleaf.context.VariablesMap with all the variables in the Context

Unqualified expressions are evaluated against this object. In fact, ${something} is completely equivalent to (but more beautiful than) ${#vars.something} . \root is a synomyn for the same object.

Verwendung:

${#vars.get('foo')}
${#vars.containsKey('foo')}
${#vars.size()}

param

for retrieving request parameters. ${param.foo} is a String[] with the values of the foo request parameter, so ${param.foo[0]} will normally be used for getting the first value.

Verwendung:

${param.foo} // Retrieves a String[] with the values of request parameter 'foo'
${param.size()}
${param.isEmpty()}
${param.containsKey('foo')}

Session

for retrieving session attributes.

Verwendung:

${session.foo} // Retrieves the session atttribute 'foo'
${session.size()}
${session.isEmpty()}
${session.containsKey('foo')}

Application

: for retrieving application/servlet context attributes.

Verwendung:

${application.foo} // Retrieves the ServletContext atttribute 'foo'
${application.size()}
${application.isEmpty()}
${application.containsKey('foo')}

httpServletRequest

direct access to the javax.servlet.http.HttpServletRequest object associated with the current request.

Verwendung:

${#httpServletRequest.getAttribute('foo')}
${#httpServletRequest.getParameter('foo')}
${#httpServletRequest.getContextPath()}
${#httpServletRequest.getRequestName()}

httpSession

direct access to the javax.servlet.http.HttpSession object associated with the current request.

Mit Spring sind auch die folgenden Objekte verfügbar:

themes

provides the same features as the Spring spring:theme JSP tag.

Verwendung:

${#themes.code('foo')}

Spring beans

Thymeleaf also allows accessing beans registered at your Spring Application Context in the standard way defined by Spring EL, which is using the syntax @beanName , for example:

<div th:text="${@authService.getUserName()}">...</div>