spring mvc 请求400错误

错误提示:

Required String parameter

 The server cannot or will not process the request due to something that is perceived to be a client error (e.g., malformed request syntax, invalid request message framing, or deceptive request routing)

网上各种原因都有 , 但都不是我要找的!

最后发现我的post提交 ,且为form-data提交就会失败!

解决方案配置:

配置下面的上传组件(虽然我不上传文件, 但是也要配置)

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
    <property name="maxUploadSize"><value>100000</value></property>
    <property name="defaultEncoding"><value>UTF-8</value></property>
</bean>

加上依赖

<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.3.3</version>
</dependency>
<dependency>
  <groupId>commons-io</groupId>
  <artifactId>commons-io</artifactId>
  <version>2.6</version>
</dependency>

这样就可以解决了