客户管理系统 Java Spring启动项目 系统要求 阿帕奇Tomcat MySQL的 Maven 目前正在进行中: 与Frontend集成 REST API端点 实体 顾客 { " ID " : " xx " , " CompanyName " : " xx " , " Email " : " xx@x.com " , " Telephone " : 123 , " Calls " : " Calls[] " , } 来电 { " ID " : String , " timestamp " : datetime , " Notes " : String