Mac上的Tomcat 10在编译servlet时不识别servlet-api.jar

Question

我正在为tomcat网页创建Servlet，Servlet不会编译。

我使用servlet-api.jar & mysql-connector.8.0.28.jar作为servlet，我还创建了几个JavaBeans来存储在数据库和页面之间传递的信息。

tomcat的目录结构如下：

所有的./Tomcat/tomcat-10/lib/

• the文件都在要编译的./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/

• the servlet中存储在./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/

• the bean中存储在./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/centerStage/

中

这是我用来编译所有内容的命令：

javac -cp .:./Tomcat/tomcat-10/lib/servlet-api.jar:./Tomcat/tomcat-10/lib/mysql-connector-java-8.0.28.jar -classpath ./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/:./Tomcat/tomcat-10/lib/ ./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java

当我试图编译servlet时，我会看到指向HttpServlet类的9个错误：

./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:32: error: cannot find symbol
public class CenterStageServlet extends HttpServlet {
                                        ^
  symbol: class HttpServlet
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:25: error: cannot find symbol
@WebServlet(name = "CenterStageServlet", 
 ^
  symbol: class WebServlet
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:41: error: cannot find symbol
   public void doGet(HttpServletRequest request, HttpServletResponse response)
                     ^
  symbol:   class HttpServletRequest
  location: class CenterStageServlet
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:41: error: cannot find symbol
   public void doGet(HttpServletRequest request, HttpServletResponse response)
                                                 ^
  symbol:   class HttpServletResponse
  location: class CenterStageServlet
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:42: error: cannot find symbol
         throws IOException, ServletException {
                             ^
  symbol:   class ServletException
  location: class CenterStageServlet
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:6: error: package jakarta.servlet does not exist
import jakarta.servlet.*;             // Tomcat 10
^
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:7: error: package jakarta.servlet.http does not exist
import jakarta.servlet.http.*;
^
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:8: error: package jakarta.servlet.annotation does not exist
import jakarta.servlet.annotation.*;  // Tomcat 10
^
./Tomcat/tomcat-10/webapps/CenterStage/WEB-INF/classes/CenterStageServlet.java:40: error: method does not override or implement a method from a supertype
   @Override
   ^
9 errors

Servlet代码：

package centerStage;

// To save as "<TOMCAT_HOME>\webapps\CenterStage\WEB-INF\classes\CenterStageServlet.java"
import java.io.*;
import java.sql.*;
import jakarta.servlet.*;             // Tomcat 10
import jakarta.servlet.http.*;
import jakarta.servlet.annotation.*;  // Tomcat 10
//import javax.servlet.*;             // Tomcat 9
//import javax.servlet.http.*;
//import javax.servlet.annotation.*;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.sql.Date;
import java.time.LocalDate;

import centerStage.*;
 
@WebServlet(name = "CenterStageServlet", 
            urlPatterns = {"/appointment", "/availibility", "/barber", "/client", "/service"})    
            // Configure the request URL for this servlet (Tomcat 7/Servlet 3.0 upwards)


public class CenterStageServlet extends HttpServlet {

    // Variables
    
   // The doGet() runs once per HTTP GET request to this servlet.
   @Override
   public void doGet(HttpServletRequest request, HttpServletResponse response)
         throws IOException, ServletException {
 
       // Do some processing
   }

   // Other Methods
}

我已经验证了我正在寻找的..jar在/lib/目录中。

在Tomcat目录中编译其他what应用程序不会给我带来任何问题，所以我不知道问题是什么。

任何帮助/建议都会很好！

Answer 1

好吧，原来是很简单的事。

当我将servlet从~Tomcat/webapp/CenterStage/WEB/classes/转移到~Tomcat/webapps/CenterStage/WEB-INF/classes/centerStage/，然后尝试使用javac -cp .:~/Tomcat/lib/servlet-api.jar:~/Tomcat/lib/mysql-connector-java-8.0.28.jar ./Tomcat/webapps/CenterStage/WEB-INF/classes/centerStage/*.java编译时，一切都很好。

因此，基本上，我应该将Servlet.java放在与JavaBeans相同的目录中，并且一切正常。