今天在寫servlet的時候出現以下報錯:

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:965)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3976)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3912)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:871)at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1714)at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1224)at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2190)at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2221)at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2016)at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:776)at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:423)at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:386)at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:330)at java.sql.DriverManager.getConnection(DriverManager.java:664)at java.sql.DriverManager.getConnection(DriverManager.java:247)at com.gxuwz.medical.database.DbUtil.getConn(DbUtil.java:22)at com.gxuwz.medical.web.servlet.LoginServlet.login(LoginServlet.java:59)at com.gxuwz.medical.web.servlet.LoginServlet.doPost(LoginServlet.java:36)at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.logging.log4j.web.Log4jServletFilter.doFilter(Log4jServletFilter.java:71)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:1025)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1137)at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2575)at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2564)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:745)

解決辦法如下:
看看你當前項目的user和password和本地數據庫的用戶名密碼是否一致，不一致修改一下

總結

以上是生活随笔為你收集整理的Servlet-Access denied for user 'root'@'localhost' (using password: YES的全部內容，希望文章能夠幫你解決所遇到的問題。

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