SpringMVC中文乱码 SpringMVC中文乱码踩坑记录
CloverYou 人气:0想了解SpringMVC中文乱码踩坑记录的相关内容吗,CloverYou在本文为您仔细讲解SpringMVC中文乱码的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:SpringMVC中文乱码,SpringMVC乱码,下面大家一起来学习吧。
问题
使用SpringMVC在返回一个字符串时发生了中文乱码问题。produces
属性无效
@RequestMapping(value = "/nihao", produces = "text/plain;charset=UTF-8") @ResponseBody public String hello(HttpServletResponse response) throws UnsupportedEncodingException { User user = new User(); user.setSex("男"); user.setName("Clover"); user.setAge(19); return user.toString(); }
HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Content-Type: text/plain;charset=ISO-8859-1 Content-Length: 36 Date: Sun, 01 Aug 2021 12:20:21 GMT Connection: close { "name": "Clover", "sex": "?", "age": 19 }
添加常用的过滤器org.springframework.web.filter.CharacterEncodingFilter
依然无法解决
<filter> <filter-name>characterEncodingFilter</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>utf-8</param-value> </init-param> <init-param> <param-name>forceEncoding</param-name> <param-value>true</param-value> </init-param> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
问题根源
最后查看源码时发现问题出现在处理内容协商的时候,SpringMVC使用了一个叫做org.springframework.http.converter.StringHttpMessageConverter
的转换器进行处理java.lang.String
。在这个处理器中,有个一默认的编码格式,它甚至使用了final
修饰…..
public static final Charset DEFAULT_CHARSET = Charset.forName("ISO-8859-1");
并且,通过Postman或者REST Client发送请求时,Accept
默认是*/*
。
解决方案
方案一
注册一个StringHttpMessageConverter
,注册之后不再使用SpringMVC默认的。它可以将produces
设置为Content-Type
。也就是说@RequestMapping
的produces
属性生效了
<mvc:annotation-driven> <mvc:message-converters> <bean class="org.springframework.http.converter.StringHttpMessageConverter"/> </mvc:message-converters> </mvc:annotation-driven>
HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Accept-Charset: ... Content-Type: text/plain;charset=utf-8 Content-Length: 37 Date: Sun, 01 Aug 2021 13:09:35 GMT Connection: close { "name": "Clover", "sex": "男", "age": 19 }
方案二
Accept问题,SpringMVC的默认StringHttpMessageConverter
处理的是*/*
,那手动设置一个Accept尽可能避开它…..
POST {{url}}/nihao HTTP/1.1 Accept: text/plain;charset=utf-8
HTTP/1.1 200 OK Server: Apache-Coyote/1.1 Content-Type: text/plain;charset=utf-8 Content-Length: 38 Date: Sun, 01 Aug 2021 13:20:16 GMT Connection: close { "name": "Clover", "sex": "男", "age": 19 }
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