报错1Resolved [org.springframework.http.converter.HttpMessageNotWritableException: No converter for [class cn.meowrain.pojo.User] with preset Content-Ty

依赖添加 <dependency> <groupId>com.mysql</groupId> <artifactId>mysql-connector-j</artifactId>

创建普通项目修改项目依赖：<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" x