Mysql-navicat cannot connect to the database

! IMG (img.ask.csdn.netupload20160427146175824410612142.png) used java to connect to the database in the afternoon and use java to operate navicat. However, myclipse cannot connect to navicat. So I opened navicat and found that the database could not be connected after navicat was opened. the prompt was "canntconectmysql10038". I changed the connection name and the interface. And mysql5.7commandlineclient... mysql database

During the development of java in the afternoon, java was used to connect to the database, and java was used to operate the database through navicat. However, myclipse cannot connect to navicat. So I opened navicat and found that the database could not be connected after navicat was opened. the prompt was "cannt conect mysql 10038". I changed the connection name and the interface. In addition, the mysql5.7command line client window flashes back after the password is entered. What should you do? Urgent !!!!