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
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@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();
}
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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
}
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添加常用的过滤器org.springframework.web.filter.CharacterEncodingFilter依然无法解决
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<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>
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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…..
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public static final Charset DEFAULT_CHARSET = Charset.forName("ISO-8859-1");
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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
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<mvc:annotation-driven>
<mvc:message-converters>
<bean class="org.springframework.http.converter.StringHttpMessageConverter"/>
</mvc:message-converters>
</mvc:annotation-driven>
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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
}
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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…..
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POST {{url}}/nihao HTTP/1.1
Accept: text/plain;charset=utf-8
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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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到此这篇关于SpringMVC中文乱码踩坑记录的文章就介绍到这了,更多相关SpringMVC中文乱码内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家！
原文链接：https://www.cnblogs.com/CloverYou/p/15087741.html