Spring-忽略大小写

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需求

  • 实现接口参数忽略大小写

序列化忽略大小写

  • 接口使用 @RequestBody 实现时忽略大小写序列化
  • 配置三选一

application.yml

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spring:
  jackson:
    mapper:
      accept-case-insensitive-properties: true

JacksonConfig

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@Configuration
public class JacksonConfig {

    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);

        return mapper;
    }
}

WebMvcConfigurationSupport

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@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        ObjectMapper mapper = new ObjectMapper();
        mapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
        MappingJackson2HttpMessageConverter json = new MappingJackson2HttpMessageConverter(mapper);
        converters.add(json);
    }
}

URL 忽略大小写

  • 接口路径忽略大小写

WebMvcConfigurationSupport

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@Configuration
public class WebMvcConfig extends WebMvcConfigurationSupport {

    @Override
    public void configurePathMatch(PathMatchConfigurer configurer) {
        AntPathMatcher pathMatcher = new AntPathMatcher();
        pathMatcher.setCaseSensitive(false);
        configurer.setPathMatcher(pathMatcher);
    }
}

参数忽略大小写

OncePerRequestFilter

  • 启动类添加 @ServletComponentScan
  • 可以通过 urlPatterns 配置拦截路径
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@Order(1)
@WebFilter(filterName = "caseInsensitiveFilter", urlPatterns = "/*")
public class CaseInsensitiveRequestParameterNameFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        filterChain.doFilter(new CaseInsensitiveParameterNameHttpServletRequest(request), response);
    }

    private static class CaseInsensitiveParameterNameHttpServletRequest extends HttpServletRequestWrapper {
        
        private final LinkedCaseInsensitiveMap<String[]> map = new LinkedCaseInsensitiveMap<>();

        public CaseInsensitiveParameterNameHttpServletRequest(HttpServletRequest request) {
            super(request);
            map.putAll(request.getParameterMap());
        }

        @Override
        public String getParameter(String name) {

            String[] array = this.map.get(name);
            if (array != null && array.length > 0) {
                return array[0];
            }
            return null;
        }

        @Override
        public Map<String, String[]> getParameterMap() {
            return Collections.unmodifiableMap(this.map);
        }

        @Override
        public Enumeration<String> getParameterNames() {
            return Collections.enumeration(this.map.keySet());
        }

        @Override
        public String[] getParameterValues(String name) {
            return this.map.get(name);
        }
    }
}

参考文献