本文案例來自業務部門的一個業務場景。他們的業務場景是他們部門研發了一個微服務上下文透傳組件，其透傳原理也挺簡單的，就是通過springboot攔截器把請求參數塞進threadlocal，然后下游通過threadlocal取到值，服務之間進行feign調用時，再把threadlocal的參數塞到header頭里面。這個組件一直用得好好的，突然有一天因為傳的參數值是中文，導致亂碼。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編碼不一致導致中文亂碼。于是他們就朝這個方向努力著，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() { }}

然后啟動類上加上@ServletComponentScan。@WebFilter是servlet3.0才有的注解。當然這個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() { }}

然后啟動類上加上@ServletComponentScan。@WebFilter是servlet3.0才有的注解。當然這個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StringHttpMessageConverter

百度來的基本上都是長這樣。不過在spring5版本WebMvcConfigurerAdapter這個類已經過時。其替代方式是實現WebMvcConfigurer接口或者繼承WebMvcConfigurationSupport。不過如果使用WebMvcConfigurationSupport，則會使springboot的mvc自動裝配失效。失效的原因是

拓展一點小知識，加上@EnableWebMvc同樣也會springboot的mvc自動裝配失效。其原因是

org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration這個配置類繼承WebMvcConfigurationSupport

介紹那么多種方案，并沒有解決按例的問題。那問題點出在哪里？前邊案例我們提到過，在feign調用時，會把threadlocal的參數塞到header里面。真正亂碼的問題點就在這里，header是不支持中文傳輸的，如果你硬要傳輸，基本上接收方接到就是???這種看似亂碼的符號

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

URLEncoder.encode(“我是中文亂碼”,'UTF-8')

在接收header參數時，做下URLDecoder.解碼，形如下

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

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

以上就是springboot參數傳中文亂碼的解決方案的詳細內容，更多關于springboot參數傳中文亂碼的資料請關注好吧啦網其它相關文章！