Spring URI template, Modelandview, @ModelAttribute__spring

Spring URI Template

Uri template, equivalent to pathvariable (path variable), is used primarily to match variables in URIs, which differ from common suffix passes and appear to be more concise, and rest is recommended in this way. matches fewer precedence variables and wildcard characters, priority matches longer lengths, priority matches if the first and second are the same, and the wildcard characters are less, the precedence match can use the placeholder

A variable in the URI template can be injected using a placeholder Placeholder,placeholder through a properties file Modelandview

Holding model and View,model are models, view is views, will be parsed by Viewresolver, it is only to satisfy the method to return both the view and the data

@ModelAttribute

Can be used on a method or on a method parameter. used in the method

When used in a method, it means that the method adds one or more model attributes. It is the same type parameter as the @requestmapping method supports, but cannot map the request. Instead, @ModelAttribute method executes before the @requestmapping method executes. used on method parameters

@ModelAttribute is used on method parameters, indicating that this parameter should be fetched from model, instantiated first if not present, and then added to model. If the model has this parameter, the parameter is populated with the parameter matching the parameter field name in request, which means that the parameter's property value is populated with the request parameter.