SpringBoot项目上使用富文本框，如果图片很多的话，会报如下错误：

2020-09-28 14:26:59.568 ERROR 8 --- [nio-8098-exec-5] Servlet.service() for servlet [dispatcherServlet] in context with path [/product-manage] threw exception [Request processing failed; nested exception is org.springframework.web.multipart.MultipartException: Failed to parse multipart servlet request; nested exception is java.lang.IllegalStateException: The multi-part request contained parameter data (excluding uploaded files) that exceeded the limit for maxPostSize set on the associated connector] with root cause

java.lang.IllegalStateException: The multi-part request contained parameter data (excluding uploaded files) that exceeded the limit for maxPostSize set on the associated connector

这个是字符串接收，不是文件接收，请求方式是post，post本身没有参数大小限制，但是tomcat给限制了，于是解决方式如下：

一、外置的tomcat

这个简单，直接在server.xml里面添加或者修改这句话：

<Connector port="8080" protocol="HTTP/1.1" 
  connectionTimeout="2000" 
  redirectPort="8443" 
  URIEncoding="UTF-8"
  maxThreads="3000"
  compression="on" compressableMimeType="text/html,text/xml" 
  
  maxPostSize="0" 
/>

修改这里的maxPostSize的值，默认是1024，改成0，就可以不限制了大小了

二、使用spring boot自带的tomcat

那就在application.properties中加上这句话：

server.tomcat.max-http-post-size=0

如果是SpringBoot 2.x版本加这句话：

server.tomcat.max-http-post-size=-1

修改了配置之后记得重启服务器，做了热部署的伙伴，如果无效，记得重启一下再测试。