次のようなサーブレットがあり、Eclipse tomcat で完全に実行されています。それを webapps フォルダーにアップロードし、Ubuntu サーバーで Tomcat を再起動すると、Tomcat のルート ページは正常に機能しますが、その URL (/ServerAPP/Login) は読み込まれません。なぜこれが起こっているのか誰かが何か考えているなら、私はそれを大いに感謝します. 私はUbuntuとTomcatの内部構造にかなり慣れていないので、何も見逃していた可能性があります。リクエストに応じてより多くの情報を提供できます。必要な量がわからないだけでなく、考えていない単純でばかげた何かがあるかどうかもわかりません。
package Actions;
import java.io.*;
import java.sql.*;
import java.util.logging.Logger;
import javax.servlet.*;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.*;
import javax.sql.DataSource;
@WebServlet(urlPatterns={"/Login"})
public class Login extends HttpServlet implements DataSource {
private String User = null;
Connection connection = null;
private String password = null;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
if(request.getParameter("User") != null){
this.setUser((String) request.getParameter("User").toString());
}
if(request.getParameter("password") != null){
this.setPassword((String) request.getParameter("password").toString());
}
try {
System.out.println("Loading driver...");
Class.forName("com.mysql.jdbc.Driver");
System.out.println("Driver loaded!");
} catch (ClassNotFoundException e) {
throw new RuntimeException("Cannot find the driver in the classpath!", e);
}
Login ds = new Login();
try {
connection = ds.getConnection();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
PrintWriter out = response.getWriter();
if(connection != null){
//out.println(User + " " + password);
//Check if user exists in database
if(User!= null){
Statement stmt;
ResultSet rs;
try {
stmt = connection.createStatement();
rs = stmt.executeQuery("SELECT * FROM tblUsers WHERE Username = '" + User + "';");
if(!rs.next()){
out.println("Username: " + User + " was not found in Users table.");
}
else{
//User was found now check if password is correct
if(rs.getString(3).equals(password)){
out.println("User: " + User + " login successful!");
}
else if(rs.getString(3).equals(password) == false){
//password was incorrect
out.println("Password incorrect!");
}
/*
while(rs.next()){
out.println("User ID: " + rs.getInt(1) + " Username: " + rs.getString(2));
}
*/
}
rs.close();
stmt.close();
connection.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/*
Statement stmt;
ResultSet rs;
try {
stmt = connection.createStatement();
rs = stmt.executeQuery("Select * from tblUsers;");
while(rs.next()){
out.println("User ID: " + rs.getInt(1) + " Username: " + rs.getString(2));
}
rs.close();
stmt.close();
connection.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
*/
}
}
@Override
public PrintWriter getLogWriter() throws SQLException {
// TODO Auto-generated method stub
return null;
}
@Override
public void setLogWriter(PrintWriter out) throws SQLException {
// TODO Auto-generated method stub
}
@Override
public void setLoginTimeout(int seconds) throws SQLException {
// TODO Auto-generated method stub
}
@Override
public int getLoginTimeout() throws SQLException {
// TODO Auto-generated method stub
return 0;
}
@Override
public Logger getParentLogger() throws SQLFeatureNotSupportedException {
// TODO Auto-generated method stub
return null;
}
@Override
public <T> T unwrap(Class<T> iface) throws SQLException {
// TODO Auto-generated method stub
return null;
}
@Override
public boolean isWrapperFor(Class<?> iface) throws SQLException {
// TODO Auto-generated method stub
return false;
}
@Override
public Connection getConnection() throws SQLException {
if (connection != null) {
System.out.println("Cant craete a Connection");
} else {
connection = DriverManager.getConnection(
"<redacted>", "AWSCards", "Cards9876");
}
return connection;
}
@Override
public Connection getConnection(String username, String password)
throws SQLException {
// TODO Auto-generated method stub
if (connection != null) {
System.out.println("Cant craete a Connection");
} else {
connection = DriverManager.getConnection(
"<redacted>", username, password);
}
return connection;
}
public String getUser() {
return User;
}
public void setUser(String user) {
User = user;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}