本文案例來自業(yè)務(wù)部門的一個(gè)業(yè)務(wù)場景。他們的業(yè)務(wù)場景是他們部門研發(fā)了一個(gè)微服務(wù)上下文透傳組件，其透傳原理也挺簡單的，就是通過springboot攔截器把請求參數(shù)塞進(jìn)threadlocal，然后下游通過threadlocal取到值，服務(wù)之間進(jìn)行feign調(diào)用時(shí)，再把threadlocal的參數(shù)塞到header頭里面。這個(gè)組件一直用得好好的，突然有一天因?yàn)閭鞯膮?shù)值是中文，導(dǎo)致亂碼。他們通過嘗試下面的各種方案，都無法解決。最后就讓我們部門排查處理。

他們一開始的思路方向是參數(shù)編碼不一致導(dǎo)致中文亂碼。于是他們就朝這個(gè)方向努力著，于是就有了如下方案

String value = new String('我是中文亂碼'.getBytes('ISO-8859-1'),'UTF-8');

這個(gè)是常用解決字符串中文亂碼的方法之一

@WebFilter(urlPatterns = '/*',filterName = 'CharacterEncodingFilter')public class CharacterEncodingFilter implements Filter{ @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) servletRequest; HttpServletResponse response = (HttpServletResponse) servletResponse; request.setCharacterEncoding('UTF-8'); response.setCharacterEncoding('UTF-8'); filterChain.doFilter(request , response); } @Override public void destroy() { }}

然后啟動(dòng)類上加上@ServletComponentScan。@WebFilter是servlet3.0才有的注解。當(dāng)然這個(gè)過濾器你還可以這么寫

public class CharacterEncodingFilter implements Filter{ @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) servletRequest; HttpServletResponse response = (HttpServletResponse) servletResponse; request.setCharacterEncoding('UTF-8'); response.setCharacterEncoding('UTF-8'); filterChain.doFilter(request , response); } @Override public void destroy() { }}

然后啟動(dòng)類上加上@ServletComponentScan。@WebFilter是servlet3.0才有的注解。當(dāng)然這個(gè)過濾器你還可以這么寫

public class CharacterEncodingFilter implements Filter{ @Override public void init(FilterConfig filterConfig) throws ServletException { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) servletRequest; HttpServletResponse response = (HttpServletResponse) servletResponse; request.setCharacterEncoding('UTF-8'); response.setCharacterEncoding('UTF-8'); filterChain.doFilter(request , response); } @Override public void destroy() { }}

寫個(gè)bean配置類，如下

@Bean public FilterRegistrationBean registerAuthFilter() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(new CharacterEncodingFilter(); registration.addUrlPatterns('/*'); registration.setName('CharacterEncodingFilter'); registration.setOrder(1); return registration; }方案三：在application.yml指定編碼格式為utf-8

spring: http: encoding: charset: utf-8 enabled: true force: trueserver: tomcat: uri-encoding: UTF-8方案四：寫個(gè)StringHttpMessageConverter

百度來的基本上都是長這樣。不過在spring5版本W(wǎng)ebMvcConfigurerAdapter這個(gè)類已經(jīng)過時(shí)。其替代方式是實(shí)現(xiàn)WebMvcConfigurer接口或者繼承WebMvcConfigurationSupport。不過如果使用WebMvcConfigurationSupport，則會(huì)使springboot的mvc自動(dòng)裝配失效。失效的原因是

拓展一點(diǎn)小知識(shí)，加上@EnableWebMvc同樣也會(huì)springboot的mvc自動(dòng)裝配失效。其原因是

org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration這個(gè)配置類繼承WebMvcConfigurationSupport

介紹那么多種方案，并沒有解決按例的問題。那問題點(diǎn)出在哪里？前邊案例我們提到過，在feign調(diào)用時(shí)，會(huì)把threadlocal的參數(shù)塞到header里面。真正亂碼的問題點(diǎn)就在這里，header是不支持中文傳輸?shù)模绻阌惨獋鬏敚旧辖邮辗浇拥骄褪?#63;??這種看似亂碼的符號

在把threadlocal的值塞到header里面時(shí)，先做下URLEncoder編碼，形如

URLEncoder.encode(“我是中文亂碼”,'UTF-8')

在接收header參數(shù)時(shí)，做下URLDecoder.解碼，形如下

URLDecoder.decode(header中待解碼的參數(shù)值, 'UTF-8')總結(jié)

方向錯(cuò)了，雖然再怎么努力看似也啥沒卵用，不過至少可能會(huì)收獲其他意想不到的東西

以上就是springboot參數(shù)傳中文亂碼的解決方案的詳細(xì)內(nèi)容，更多關(guān)于springboot參數(shù)傳中文亂碼的資料請關(guān)注好吧啦網(wǎng)其它相關(guān)文章！