java.sql.SQLException : Access denied for user 'root' @'localhost' (using password: YES) when trying to connect to database in eclipse

Question

我已经在我的电脑上安装了wamp服务器。我可以访问 phpmyadmin，没有任何错误。

但是当我尝试在 Eclipse 中连接数据库时，对于应用程序，出现错误:

java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4074) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4006) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:919) at com.mysql.jdbc.MysqlIO.proceedHandshakeWithPluggableAuthentication(MysqlIO.java:1694) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1244) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2397) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2430) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2215) at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:813) at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:399) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:334) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at org.apache.jsp.data_jsp._jspService(data_jsp.java:74) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:225) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1001) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:585) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

这是 data.jsp 文件:

    <%@ page import="java.sql.*" %>
    <%@ page import="java.io.*" %>
    <%@ page import="com.mysql.*" %>
<?xml version="1.0"?>
<train>
<%
    Connection connection = null;
    Statement statement = null;
    ResultSet result = null;

    try {
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/train", "root", "*****");
        out.println("connected to database");
    } catch(Exception e) {
        e.printStackTrace();
        out.println("error!!!!");
    }
%>
</train>

所有密码都是正确的，但我在网上找不到任何可以帮助我解决此问题的信息。

有人可以帮助我吗？

Answer 1

尝试运行此命令，看看是否有帮助。授予火车上的所有权限。* TO root@localhost IDENTIFIED BY 'nezinasi';