我試圖從數據庫中提取記錄。但我面臨這個拒絕訪問的問題。我嘗試了堆棧溢出中提到的其他解決方案,如授予用戶權限..但沒有工作。訪問被拒絕用戶'root'@'localhost'
代碼,用於訪問數據庫:錯誤的
public void service(HttpServletRequest request,HttpServletResponse response) throws IOException, ServletException{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<head><title>Servlet JDBC</title></head>");
out.println("<body>");
out.println("<h1>Servlet JDBC</h1>");
out.println("</body></html>");
// connecting to database
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection("jdbc:mysql://localhost:3306/employees","root","root");
stmt = con.createStatement();
rs = stmt.executeQuery("SELECT * FROM employee");
// displaying records
while(rs.next()){
out.print(rs.getObject(1).toString());
out.print("\t\t\t");
out.print(rs.getObject(2).toString());
out.print("<br>");
}
} catch (SQLException e) {
throw new ServletException("Servlet Could not display records.", e);
} catch (ClassNotFoundException e) {
throw new ServletException("JDBC Driver not found.", e);
} finally {
try {
if(rs != null) {
rs.close();
rs = null;
}
if(stmt != null) {
stmt.close();
stmt = null;
}
if(con != null) {
con.close();
con = null;
}
} catch (SQLException e) {}
}
out.close();
}
堆棧跟蹤:
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4187)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4119)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:927)
com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4686)
com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1304)
com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2483)
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2516)
com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2301)
com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)
com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416)
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
java.sql.DriverManager.getConnection(Unknown Source)
java.sql.DriverManager.getConnection(Unknown Source)
WebAppAss.DatabaseAccess.service(DatabaseAccess.java:36)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
什麼能在這種情況下的問題。我試圖創建一個新的數據庫,但這並不起作用。
密碼可能是錯誤的。 –
no it isnt ..我使用相同的密碼在mysql中登錄 –
您能告訴我們您用來授予訪問權限的命令嗎? – Claudio