Spring get/post 中文乱码

<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>/web/*</url-pattern>

<dispatcher>REQUEST</dispatcher>

<dispatcher>FORWARD</dispatcher>

</filter-mapping>

该方式为什么对POST而对GET无效呢？

不妨看看CharacterEncodingFilter内的实现 doFilterInternal

该方法调用

request.setCharacterEncoding(this.encoding);

而该方法的说明

Overrides the name of the character encoding used in the body
of this
request. This method must be called prior to reading request parameters or
reading input using getReader().

注意到没，只对body起作用。

而get方式的请求参数在hearder里

post方式的请求参数在body里

原因自然清晰了。