[英]java.lang.ClassNotFoundException with Tomcat WAR file
我正在嘗試為我目前正在處理的項目制作一個簡單的 REST API,以簡化我每天必須完成的任務,當我到達托管它的地方時,我遇到了 500 服務器錯誤. 查看(tomcat home dir)/logs/localhost.2021-10-22.log中的日志,我發現了這個錯誤:
22-Oct-2021 21:33:58.974 SEVERE [http-nio-13760-exec-64] org.apache.catalina.core.StandardWrapperValve.invoke Allocate exception for servlet [OrderServlet]
java.lang.ClassNotFoundException: api.OrderServlet
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1407)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1215)
at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:538)
at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:519)
at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:149)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1070)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:788)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:128)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1722)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
我還有這里“不存在”的類的代碼:
package api;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.JSONObject;
import data.Order;
public class OrderServlet extends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
String requestUrl = request.getRequestURI();
String id = requestUrl.substring("cafe/orders/".length());
Order order = Requests.getInstance().getOrder(id);
if (order != null) {
String json = "{\n";
json += "\"id\": " + JSONObject.quote(order.getID()) + ",\n";
json += "\"id\": " + JSONObject.quote(order.getName()) + ",\n";
json += "\"id\": " + JSONObject.quote(String.valueOf(order.getTime())) + ",\n";
//various parameters removed to prevent abuse in the future (I'm looking at you, Dax)
//I'd rather not have a coffee order show up with a comically large amount of creamers in it
json += "};";
response.getOutputStream().println(json);
} else {
//order was not found
response.sendError(404);
}
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse responce) throws IOException, ServletException {
String id = request.getParameter("id");
String name = request.getParameter("name");
int time = Integer.parseInt(request.getParameter("time"));
//various parameters removed
Requests.getInstance().putOrder(new Order(id, name, time, type, //various parameters removed
));
}
}
我已經檢查過該類是否確實存在,我已經嘗試重建類,作為非編譯文件導入並處理 web.xml,並且我已經檢查過構建路徑中沒有隨機的 jre6 庫(從這里)。 我沒有使用 Maven,Tomcat 能夠很好地加載文檔和管理器。 如何讓 Tomcat 能夠識別該類?
看起來文件沒有從 Eclipse 正確導出,因此手動修復了問題。
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