在application.properties 中增加
spring.http.encoding.force=true spring.http.encoding.charset=UTF-8 spring.http.encoding.enabled=true server.tomcat.uri-encoding=UTF-8
解决办法
设置 File Encodings的Transparent native-to-ascii conversion为true，具体步骤如下：依次点击
File -> Settings -> Editor -> File Encodings
将Properties Files (*.properties)下的Default encoding for properties files设置为UTF-8，将Transparent native-to-ascii conversion前的勾选上。