項目啟動成功后，瀏覽器訪問報java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)
2019-02-15 16:23:06.230 ERROR 14604 --- [eate-1204953090] com.alibaba.druid.pool.DruidDataSource? ?: create connection error, url: jdbc:mysql://127.0.0.1:3306/dianshang, errorCode 1045, state 28000
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: NO)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1086) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:928) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1750) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1290) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2502) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2535) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2320) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46) ~[mysql-connector-java-5.1.29.jar:na]
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_92]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_92]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_92]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_92]
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416) ~[mysql-connector-java-5.1.29.jar:na]
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:347) ~[mysql-connector-java-5.1.29.jar:na]
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1464) ~[druid-1.1.3.jar:1.1.3]
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1529) ~[druid-1.1.3.jar:1.1.3]
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2239) ~[druid-1.1.3.jar:1.1.3]
使用generator可以自動生成文件，但啟動項目成功后，使用瀏覽器訪問報上面的錯誤。。。。
2019-05-10
SpringBoot項目配置文件有兩種格式，常用的
application-xx.properties和最新的application-xx.yml。?運行項目時常常出現以上錯誤。一般是兩個原因導致的：要么是連接信息配置錯誤，要么就是數據庫未授權。
localhost改成%