spring boot踩坑记

• resolved exception caused by handler execution: org.springframework.http.converter.httpmessagenotwritableexception: no converter found for return value of type: class cn.argonavis.labeltool.bean.responsebean

  将return的类添加getter/setter；

• 前端报错：post net::err_connection_reset 且后端报错：2018-09-21 10:57:29.469 warn 7076 --- [nio-8080-exec-4] .w.s.m.s.defaulthandlerexceptionresolver : resolved exception caused by handler execution: org.springframework.web.bind.missingservletrequestparameterexception: required string parameter 'userid' is not present
  2018-09-21 10:57:30.442 warn 7076 --- [nio-8080-exec-5] .w.s.m.s.defaulthandlerexceptionresolver : resolved exception caused by handler execution: org.springframework.web.bind.missingservletrequestparameterexception: required string parameter 'userid' is not present
  2018-09-21 10:57:31.446 warn 7076 --- [io-8080-exec-14] .w.s.m.s.defaulthandlerexceptionresolver : resolved exception caused by handler execution: org.springframework.web.bind.missingservletrequestparameterexception: required string parameter 'userid' is not present

  这个的意思应该是数据量太大，spring boot自动拦截了，所以会不停的发好几次，导致后端报好几个这个问题；解决方法：
  配置文件里添加：server.tomcat.max-http-post-size=50000000

• log4j:warn no appenders could be found for logger (cn.argonavis.labeltool.util.httprequestutils).
  log4j:warn please initialize the log4j system properly.
  log4j:warn see for more info.

  在主类的main函数中添加 basicconfigurator.configure();即可；

• java.io.ioexception: stream closed

  将

  fw.close();
  bw.close();
  改成

  bw.close();
  fw.close();
  运行war：nohup java -jar spring-boot-1.0-snapshot.jar > log.file 2>&1 &