when I replace the js file, the src address of js I want to add ${pageContext.request.contextPath} to the red box, but I will error: Failed to execute goal com.google.code.maven-replacer-plugin:replacer:1.5.2:replace (default) on project mission: named capturing group is missing trailing"}"- > [Help 1] say one less}, but I don"t know where it is missing! The figure is as follows 
$has a special purpose in the configuration file, and needs to be escaped when using it
change it to src= "/ static/js/testjs/$ {'$'} 1" try
EDITED
src="${'$'}{pageContext.request.contextPath}/static/js/testjs/${'$'}1"> & dollar; {pageContext.request.contextPath} escape this paragraph to ok 
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