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Servlet响应未显示在网页上

嗨,我是java编码的新手,我试图在eclipse中创建动态网页.这是我的demoServlet.java代码

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet("/demoServlet")
public class demoServlet extends HttpServlet {
    private static final long serialVersionUID = 1L;
    public demoServlet() {
        super();
    }
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
             response.setContentType("text/html");
             PrintWriter out= response.getWriter();
             out.println("<!DOCTYPE html PUBLIC \''>");
             out.println("<html>");
             out.println("<head>");
             out.println("<script language=\'JavaScript\'>");
             RequestDispatcher rd= request.getRequestDispatcher("/WEB-INF/javascript/Validate.js");
             rd.include(request, response);
             out.println("</script>");
             out.println("</head>");
             out.println("<body>"); 
             out.println("<form action=\'/myWebprj/Success.jsp onSubmit=\'return Validateusername(this.username.value)\'>");
             out.println("UserName: <input type=\'text\' name=\'username\'>");
             out.println("<input type=\'submit\' value=\'Submit\'>");
             out.println("</form>");
             out.println("</body>");
             out.println("</html>"); …
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javascript java jsp servlets

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