这是我创建的 servlet，当我运行它时它只给我一个空白屏幕：
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import java.util.*;
public class salesWOBriensrv extends HttpServlet {
/**
*
* @param request
* @param response
* @throws ServletException
* @throws IOException
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
response.setContentType("text/html");
Connection connection = null;
try{
Class.forName("oracle.jdbc.driver.OracleDriver");
connection = DriverManager.getConnection("jdbc:oracle:thin:@xxxx.xxxx.xxxx:1521:xxxx","xxxx","xxxxx");
Statement stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM sales ORDER BY sale_amount, sale_date");
out.println("<html>");
out.println("<head>");
out.println("<title>Step 2 - Java Servlet for SALES Data/title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Step 2 - Java Servlet for SALES Data</h1>");
out.println("<table border='1'>");
out.println("<b><th><tr><td>Sales ID</td>" +
"<td>Home ID</td>" +
"<td>Customer ID</td>" +
"<td>Agent ID</td>" +
"<td>Sale Date</td>" +
"<td>Sale Amount</td>" +
"<td></td>Contract ID</tr></th></b>");
while (rs.next()) {
// Get the columns from the current row of the result set
String saleID = rs.getString(1);
String homeID = rs.getString(2);
String customerID = rs.getString(3);
String agentID = rs.getString(4);
String saleDate = rs.getString(5);
String saleAmnt = rs.getString(6);
String contractID = rs.getString(7);
out.println("<tr><td>" + saleID + "</td>" +
"<td>" + homeID + "</td>" +
"<td>" + customerID + "</td>" +
"<td>" + agentID + "</td>" +
"<td>" + saleDate + "</td>" +
"<td>" + saleAmnt + "</td>" +
"<td>" + contractID + "</td></tr>");
}
out.println("</table>");
out.println("</body>");
out.println("</html>");
}
catch (Exception e){
out.println("<html>");
out.println("<body>");
out.println("Error");
out.println("</body>");
}
}
/**
* Handles the HTTP
* <code>POST</code> method.
*
* @param request servlet request
* @param response servlet response
* @throws ServletException if a servlet-specific error occurs
* @throws IOException if an I/O error occurs
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet (request, response);
}
}
我用 x 替换了我的连接字符串，但我知道我所拥有的是正确的。任何帮助将不胜感激。