如何解决springboot参数传中文乱码 |
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前言
本文案例来自业务部门的一个业务场景。他们的业务场景是他们部门研发了一个微服务上下文透传组件,其透传原理也挺简单的,就是通过springboot拦截器把请求参数塞进threadlocal,然后下游通过threadlocal取到值,服务之间进行feign调用时,再把threadlocal的参数塞到header头里面。这个组件一直用得好好的,突然有一天因为传的参数值是中文,导致乱码。他们通过尝试下面的各种方案,都无法解决。最后就让我们部门排查处理。 业务部门的实现思路他们一开始的思路方向是参数编码不一致导致中文乱码。于是他们就朝这个方向努力着,于是就有了如下方案 方案一: String value = new String("我是中文乱码".getBytes("ISO-8859-1"),"UTF-8");这个是常用解决字符串中文乱码的方法之一 方案二:编写字符编码过滤器 @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() { } }然后启动类上加上@ServletComponentScan。@WebFilter是servlet3.0才有的注解。当然这个过滤器你还可以这么写 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() { } }写个bean配置类,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指定编码格式为utf-8 spring: http: encoding: charset: utf-8 enabled: true force: true server: tomcat: uri-encoding: UTF-8 方案四:写个StringHttpMessageConverter
在把threadlocal的值塞到header里面时,先做下URLEncoder编码,形如 URLEncoder.encode(“我是中文乱码”,"UTF-8")在接收header参数时,做下URLDecoder.解码,形如下 URLDecoder.decode(header中待解码的参数值, "UTF-8") 总结方向错了,虽然再怎么努力看似也啥没卵用,不过至少可能会收获其他意想不到的东西 |
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