[Thymeleaf + Spring] 18 Appendix A: Expression Basic Objects

https://www.thymeleaf.org/doc/tutorials/3.1/usingthymeleaf.html#appendix-a-expression-basic-objects

Tutorial: Using Thymeleaf

 

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default 로 가져올 수 있는 thymeleaf object, variable maps 들을 살펴본다

 

 

 

Base Objects

 

 

# ctx - context 객체, org.thymeleaf.context.IContext or org.thymeleaf.context.IWebContext 에서 가져온다

# locale - java.util.Locale 에서 직접 액세스 해서 가져온다

 

/*
 * ======================================================================
 * See javadoc API for class org.thymeleaf.context.IContext
 * ======================================================================
 */

${#ctx.locale}
${#ctx.variableNames}

/*
 * ======================================================================
 * See javadoc API for class org.thymeleaf.context.IWebContext
 * ======================================================================
 */

${#ctx.request}
${#ctx.response}
${#ctx.session}
${#ctx.servletContext}




${#locale}

 

 

Web context namespaces for request/session attributes, etc.

web 환경에서 request parameters, session attributes and application attributes 를 가져올 수 있다

 

context 에 변수로 추가된 map 으로 # 없이 액세스 해야한다

 

param, session, application

 

 

• 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.

/*
 * ============================================================================
 * See javadoc API for class org.thymeleaf.context.WebRequestParamsVariablesMap
 * ============================================================================
 */

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

 

• session : for retrieving session attributes.

/*
 * ======================================================================
 * See javadoc API for class org.thymeleaf.context.WebSessionVariablesMap
 * ======================================================================
 */

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

 

• application : for retrieving application/servlet context attributes.

/*
 * =============================================================================
 * See javadoc API for class org.thymeleaf.context.WebServletContextVariablesMap
 * =============================================================================
 */

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

Note there is no need to specify a namespace for accessing request attributes (as opposed to request parameters) because all request attributes are automatically added to the context as variables in the context root:

${myRequestAttribute}