Java Servlet不指向JSP页面
我们需要使用Java、HTML、bean和JSP编写Web应用程序。问题是我从未参加过HTML或CSS课程 我有一个名为index.HTML的基本HTML页面，它在带有提交按钮的文本字段中获取用户的名字和姓氏。当我按下submit时，我得到一个“页面无法显示错误”。我已经将我的代码与我的导师进行了比较，结果非常相似，因此我不确定我做错了什么。任何帮助都将不胜感激 另外，不要介意我糟糕的格式 index.htmlJava Servlet不指向JSP页面,java,html,jsp,servlets,jdbc,Java,Html,Jsp,Servlets,Jdbc,我们需要使用Java、HTML、bean和JSP编写Web应用程序。问题是我从未参加过HTML或CSS课程 我有一个名为index.HTML的基本HTML页面，它在带有提交按钮的文本字段中获取用户的名字和姓氏。当我按下submit时，我得到一个“页面无法显示错误”。我已经将我的代码与我的导师进行了比较，结果非常相似，因此我不确定我做错了什么。任何帮助都将不胜感激 另外，不要介意我糟糕的格式 index.html <!DOCTYPE html> <html> <
<!DOCTYPE html>
<html>
<head>
<title>Final Project</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<h1>Welcome to Banking by Tyler Weaver</h1>
<h4>Please Enter your First and Last Name</h4>
<form action="BankingControl" method="POST">
<input type="hidden" name="action" value="Menu">
First Name:
<input type="text" name="FirstName" required/> <br></>
Last Name:
<input type="text" name="LastName" required/> <br></>
<input type="submit" value="Login"/>
</form>
</body>
</html>
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.logging.Level;
import utilities.ErrorLogger;
public class MySQL {
private final String databaseURL;
private final String userName;
private final String password;
public MySQL(String databaseURL, String userName, String password) {
this.databaseURL = databaseURL;
this.userName = userName;
this.password = password;
initDB();
}
private void initDB() {
try {
Class.forName("com.mysql.jdbc.Driver").newInstance(); //Not needed for MySQL - here for show only
} catch (ClassNotFoundException ex) {
ErrorLogger.log(Level.SEVERE, "Could not find the class com.mysql.jdbc.Driver \n"
+ "Program will now exit. ", ex);
System.exit(1);
} catch (InstantiationException ex) {
ErrorLogger.log(Level.SEVERE, "Could not instaniate the class com.mysql.jdbc.Driver \n"
+ "Program will now exit. ", ex);
System.exit(1);
} catch (IllegalAccessException ex) {
ErrorLogger.log(Level.SEVERE, "Could not access the class com.mysql.jdbc.Driver \n"
+ "Program will now exit. ", ex);
System.exit(1);
}
try {
Connection conn = DriverManager.getConnection(databaseURL, userName, password);
conn.close();
} catch (SQLException ex) {
ErrorLogger.log(Level.SEVERE, "Could not connect to the database. "
+ "Database string = "
+ databaseURL + " user = " + userName + " password " + password, ex);
System.exit(1);
}
}
public Connection getConnection() {
Connection conn = null;
try {
conn = DriverManager.getConnection(databaseURL, userName, password);
} catch (SQLException e) {
ErrorLogger.log(Level.SEVERE, "Could not connect to the database. "
+ "Database string = "
+ databaseURL + " user = " + userName + " password " + password);
System.exit(1);
}
return conn;
}
public void closeConnection(Connection connection) {
if (connection != null) {
try {
connection.close();
} catch (SQLException e) {
ErrorLogger.log(Level.SEVERE, "SQL Exception is thrown while "
+ "trying to close a Connection object. The connection "
+ "object was not null.", e);
}
}
}
}
import java.io.IOException;
import java.sql.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.logging.FileHandler;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;
public class ErrorLogger {
private static final String errorFileName = "SQLErrorLogger";
public static boolean showLogInErrorWindow = true;
private static Logger errorLogger;
private static void initializeLogging() throws IOException {
String logFile = getLogfileName();
errorLogger = Logger.getLogger(logFile);
Handler handler = new FileHandler(logFile);
handler.setFormatter(new java.util.logging.SimpleFormatter());
if (showLogInErrorWindow) {
errorLogger.setUseParentHandlers(true);
} else {
errorLogger.setUseParentHandlers(false);
}
errorLogger.addHandler(handler);
}
private static String getFormattedDate(Date date) {
DateFormat format;
format = new SimpleDateFormat("MM-dd-yyyy");
return (format.format(date));
}
private static String getFormattedTime(Date date) {
DateFormat format;
format = new SimpleDateFormat("hh.mm.a");
return (format.format(date));
}
private static String getDateTime(Date date) {
String sDateTime = getFormattedDate(date) + "_"
+ getFormattedTime(date);
return sDateTime;
}
private static String getLogfileName() {
String logFileName = errorFileName;
Date date = new Date(System.currentTimeMillis());
String sFormattedDateTime = getDateTime(date);
logFileName += "_" + sFormattedDateTime;
logFileName += ".log";
return logFileName;
}
public static String getNewLogFileName(String logFileBase, String logFileExt) {
String logFile = logFileBase;
Date date = new Date(System.currentTimeMillis());
String sFormattedDateTime = getDateTime(date);
logFile += "_" + sFormattedDateTime;
logFile += logFileExt;
return logFile;
}
public static void log(Level level, String message, Throwable ex) {
if (errorLogger == null) {
initLogger();
}
errorLogger.log(level, message, ex);
}
public static void log(Level level, String message) {
if (errorLogger == null) {
initLogger();
}
errorLogger.log(level, message);
}
private static void initLogger() {
try {
initializeLogging();
} catch (IOException ex) {
errorLogger = Logger.getLogger(getLogfileName());//Will not write to a file
errorLogger.log(Level.SEVERE, "Could not create a file handler for teh error logger");
}
}
public static void main(String[] args) {
ErrorLogger.log(Level.SEVERE, "Test error Message");
}
}
错误的图像
在这里输入一个答案，以防有人遇到这个问题。问题是由于缺少JAR而发生的内部服务器错误 您应该提供完整的web.xml以及错误的含义（签入控制台-服务器返回错误或浏览器根本不想连接）。伙计们，请表现出最小的努力！我想看看目录结构和你可能有的其他控制器。您正在重定向到一个资源，但我不知道该资源是否与root位于同一目录中，还是位于其他地方？干杯。@MichalWilkowski如何显示web.xml？我会在上面列出我的目录结构！顺便说一句，当从index.html转到jsp时，您的url是否如您所期望的那样？我觉得你的转发是相对的，而不是绝对的，所以它实际上发送到了一个错误的url。我从index.html转到bankingcontrolservlet，它将把它指向一个jsp。我使用相同的结构，将URL完全按照我的导师所说的方式记录下来。
import java.io.IOException;
import java.sql.Date;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.logging.FileHandler;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;
public class ErrorLogger {
private static final String errorFileName = "SQLErrorLogger";
public static boolean showLogInErrorWindow = true;
private static Logger errorLogger;
private static void initializeLogging() throws IOException {
String logFile = getLogfileName();
errorLogger = Logger.getLogger(logFile);
Handler handler = new FileHandler(logFile);
handler.setFormatter(new java.util.logging.SimpleFormatter());
if (showLogInErrorWindow) {
errorLogger.setUseParentHandlers(true);
} else {
errorLogger.setUseParentHandlers(false);
}
errorLogger.addHandler(handler);
}
private static String getFormattedDate(Date date) {
DateFormat format;
format = new SimpleDateFormat("MM-dd-yyyy");
return (format.format(date));
}
private static String getFormattedTime(Date date) {
DateFormat format;
format = new SimpleDateFormat("hh.mm.a");
return (format.format(date));
}
private static String getDateTime(Date date) {
String sDateTime = getFormattedDate(date) + "_"
+ getFormattedTime(date);
return sDateTime;
}
private static String getLogfileName() {
String logFileName = errorFileName;
Date date = new Date(System.currentTimeMillis());
String sFormattedDateTime = getDateTime(date);
logFileName += "_" + sFormattedDateTime;
logFileName += ".log";
return logFileName;
}
public static String getNewLogFileName(String logFileBase, String logFileExt) {
String logFile = logFileBase;
Date date = new Date(System.currentTimeMillis());
String sFormattedDateTime = getDateTime(date);
logFile += "_" + sFormattedDateTime;
logFile += logFileExt;
return logFile;
}
public static void log(Level level, String message, Throwable ex) {
if (errorLogger == null) {
initLogger();
}
errorLogger.log(level, message, ex);
}
public static void log(Level level, String message) {
if (errorLogger == null) {
initLogger();
}
errorLogger.log(level, message);
}
private static void initLogger() {
try {
initializeLogging();
} catch (IOException ex) {
errorLogger = Logger.getLogger(getLogfileName());//Will not write to a file
errorLogger.log(Level.SEVERE, "Could not create a file handler for teh error logger");
}
}
public static void main(String[] args) {
ErrorLogger.log(Level.SEVERE, "Test error Message");
}
}