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When I use my search feature, I get an http status 500 error. It claims that
Error Report
HTTP Status 500 – Internal Server Error
Type Exception Report
Message SearchServlet has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0 (unable to load class [SearchServlet])
Description The server encountered an unexpected condition that prevented it from fulfilling the request.
Exception java.lang.UnsupportedClassVersionError: SearchServlet has been compiled by a more recent version of the Java Runtime (class file version 53.0), this version of the Java Runtime only recognizes class file versions up to 52.0 (unable to load class [SearchServlet]) org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2286) org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:811) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1260) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1119) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:488) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Unknown Source)
I am using compiler compliance level 9. I have JRE 1.8 which I thought was the most recent. When I try to install Java 9, using the Eclipse Marketplace, it tells me that
No repository found at
http://download.eclipse.org/eclipse/updates/none.
I believe, given all of this, I am completely up to date, but how am I not able to search for records in the database?
<!DOCTYPE html>
<html>
<head>
<meta charset="ISO-8859-1" <title>Add contact to Phone Book</title>
<h1>Add contact to Phone Book</h1>
</head>
<body>
<form name="submitInfo" method="get" action="AddEntryServlet" First Name: <input type="text" name="firstName" />
<br/>
<br/>
Last Name: <input type="text" name="lastName" />
<br/>
<br/>
Area Code: <input type="number" name="areaCode" />
<br/>
<br/>
Phone Number: <input type="number" name="phoneNumber" />
<br/>
<br/>
<input type="submit" value="Submit" />
</form>
</body>
<h1>Search for Contact in Phone Book</h1>
<body>
<form name="searchInfo" method="get" action="SearchServlet">
Search First Name: <input type="text" name="searchFirstName" />
<br/>
<br/>
<input type="submit" name="action" value="search" />
</form>
</body>
</html>
Search servlet code
import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Query; import org.hibernate.Session;
import entities.Tbphonebook; import util.HibernateUtil;
/** * Servlet implementation class SearchServlet */
@SuppressWarnings("deprecation")
@WebServlet("/SearchServlet")
public class SearchServlet extends HttpServlet { private static final long
serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public SearchServlet() {
super();
// TODO Auto-generated constructor stub
}
/** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */
@SuppressWarnings({ "deprecation","unchecked" })
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
Session session = HibernateUtil.getSessionFactory().openSession();
session.beginTransaction();
String firstName = request.getParameter("searchFirstName");
@SuppressWarnings("rawtypes")
Query query = Session.createQuery("from Tbphonebook where firstname = ?");
List<Tbphonebook> persons = (List<Tbphonebook>) query.getResultList();
session.getTransaction().commit();
session.close();
request.setAttribute("persons", persons);
request.getRequestDispatcher("searchResults.jsp").forward(request,response);
response.sendRedirect("searchResults.jsp");
}
Results jsp
%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;
charset=ISO-8859-1"> <title>Insert title here</title> </head>
<h1>Search Results</h1>
<h1>List Books:</h1>
<table class="table table-boardered table-striped" id="searchresults">
<tr>
<th>First Name</th>
<th>Last Name</th>
<th>Area Code</th>
<th>PhoneNumber</th>
</tr>
</table>
<script>
$(document).ready(function(){
$.getJSON("persons", function(data){
var persons_data = '';
$.each(data, function(key, value){
person_date += '<tr>';
person_data += '<td>'+value.Firstname+'</td>';
person_data += '<td>'+value.Lastname+'</td>';
person_data += '<td>'+value.Areacode+'</td>';
person_data += '<td>'+value.Phonenumber+'</td>';
person_date += '</tr>';
}
);
$('#searchresults').append(persons_data);
});
});
</script>
<%
String message = (String) request.getAttribute("message");
if(!(message == null)){
out.println(message);
}else{
message= "";
out.println(message);
}
%>
</html>
414
"When I go to my compiler I am using compiler compliance level 9." Version 52.0 is Java 8; I assume 53.0 is Java 9. You are attempting to run code compiled for Java 9 on Java 8, which results in the error you are getting. Change your compliance version to Java 8.
77
To temporarily correct the problem do the following:
Project menu > Properties > Java Compiler > Compiler compliance level > 1.8
A permanent fix likely involves installing JDK 9.
FYI 1.8 is what Java 8 is called.
I recently returned to Java after a foray into C# and installed Eclipse Oxygen onto a clean system that had never had Java installed on it before. This default everything with a brand new install of Eclipse Oxygen yet somehow or other Eclipse can't get its own parameters to match the jdk that's installed. This is the second project I created and the second time I ran into this headache.
30
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