添加webservlet的斜杠

src/com/hellogithub/servlet/deleteAllLabelServlet.java

@@ -13,7 +13,7 @@ import jakarta.servlet.http.HttpSession;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.HashMap;
-@WebServlet("deleteAllLabel")
+@WebServlet("/deleteAllLabel")
 public class deleteAllLabelServlet extends HttpServlet {
     private UserService userService = new UserService();
     @Override

src/com/hellogithub/servlet/deletelabelServlet.java

@@ -13,7 +13,7 @@ import jakarta.servlet.http.HttpSession;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.HashMap;
-@WebServlet("deletelabel")
+@WebServlet("/deletelabel")
 public class deletelabelServlet extends HttpServlet {
     private UserService userService = new UserService();
     @Override

src/com/hellogithub/servlet/selectByInputServlet.java

@@ -16,7 +16,7 @@ import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.HashMap;
 import java.util.List;
-@WebServlet("selectByInput")
+@WebServlet("/selectByInput")
 public class selectByInputServlet extends HttpServlet {
     private com.hellogithub.service.projectService projectService=new projectService();
     @Override

src/com/hellogithub/servlet/selectUserLabelServlet.java

@@ -9,7 +9,7 @@ import jakarta.servlet.http.*;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.HashMap;
-@WebServlet("selectUserLabel")
+@WebServlet("/selectUserLabel")
 public class selectUserLabelServlet extends HttpServlet {
     private UserService userService = new UserService();
     @Override