MockMvc WebFilter不生效问题解决

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@Configuration
@Order(1)
@WebFilter(urlPatterns = ["/**"])
class HttpServletRequestWrapperFilter : Filter {
    override fun doFilter(req: ServletRequest?, resp: ServletResponse?, chain: FilterChain?) {
        when (req) {
            is HttpServletRequest -> chain?.doFilter(MyHttpServletRequestWrapper(req), resp)
            else -> chain?.doFilter(req, resp)
        }
    }
}

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@Before
fun setUp() {
    mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext)
        .addFilters<DefaultMockMvcBuilder>(HttpServletRequestWrapperFilter())
        .build()
}